CN108610988A

CN108610988A - A kind of absorption of silicon titanium aeroge and photocatalysis interior wall coating

Info

Publication number: CN108610988A
Application number: CN201810482004.6A
Authority: CN
Inventors: 郑善
Original assignee: 郑善
Current assignee: TIANJIN WEIYUAN TECHNOLOGY DEVELOPMENT Co.,Ltd.
Priority date: 2017-06-12
Filing date: 2017-06-12
Publication date: 2018-10-02
Also published as: CN108659711A; CN108410366B; CN107189692B; CN108659711B; CN107189692A; CN108410366A

Abstract

The invention belongs to the indoor absorption of functional coating technical field more particularly to a kind of environment-friendly type and photocatalysis silicon titanium aeroge interior wall coating, in parts by weight, including water A, batch mixing A 1, batch mixing A 2, according to weight ratio meter, the water A：Batch mixing A 1, batch mixing A 2=1~3：2~6：1~3, the batch mixing A 1 include nano-titanium oxide comprehensive silicon aerogels powder, aerogel powder A, wetting agent A 1, wetting agent A 2, color stuffing A, and batch mixing A 2 is binder；Preparation method is finished product after progress shear agitation, emulsification after material batch mixed；This interior wall coating have the function of while absorption while decompose indoor pollutant and self-cleaning function, service life is long.

Description

A kind of absorption of silicon titanium aeroge and photocatalysis interior wall coating

The application is the Chinese invention patent (applying date that number of patent application is 201710450934.9：06 month 2017 12 Day, patent name：A kind of absorption of silicon titanium aeroge and photocatalysis interior wall coating and preparation method thereof) divisional application.

Technical field

The invention belongs to the indoor absorption of functional coating technical field more particularly to a kind of environment-friendly type and photocatalysis silicon titanium Aeroge interior wall coating and preparation method thereof.

Background technology

Formaldehyde is a kind of colourless gas with penetrating odor, and finishing material used in everyday and new indoor furniture are Cause the main source of formaldehyde pollution.Due to the limitation of technology and material, house generally has a large amount of residues of formaldehyde after finishing, Scientific investigations showed that the time existing for formaldehyde is very long, incubation period is generally 3-15, by simply divulging information, adsorbing not It can thoroughly be eradicated, only thoroughly decomposing formaldehyde could be thoroughly removed, and secondary pollution is prevented.

Activated carbon, diatom ooze are the traditional products using adsorption function removal formaldehyde.Activated carbon passes through physical absorption Mode removes formaldehyde, and after the adsorption capacity of activated carbon reaches saturation, can not just remain valid removal formaldehyde, when air themperature or When humidity changes, the Form aldehyde release of absorption can also be come out.Diatom ooze is a kind of coating being directly used in wall decoration, is only had The function of formaldehyde adsorption, there is no the function of degradation of formaldehyde, adsorption capacity can not just continue to adsorb after reaching saturation, Bu Nengchi Continuous and long-acting removal formaldehyde, therefore formaldehyde cannot be inherently eliminated.

Nano-titanium dioxide (TiO₂) it is a kind of emerging in recent years catalysis material, under illumination condition, nano-silica Changing titanium can make Degradation Formaldehyde be carbon dioxide and water, formaldehyde thoroughly be eliminated, therefore, nano-titanium dioxide is a kind of excellent light Catalyst.Nano-titanium dioxide plays photocatalysis, and it is necessary to meet following condition：1, illumination；2, the grain size of titanium dioxide reaches Nanoscale, to make its particle surface that there is sufficiently strong energy of oxidation；3, the crystal phase structure of nano-titanium dioxide anatase titanium dioxide with On.But the nano-titanium dioxide of single dispersion is difficult to prepare, concrete reason is as follows：Crystal phase structure receiving more than anatase titanium dioxide Rice titanium dioxide has to pass through 600 DEG C or more of high temperature sintering in the production process, and nano level material is in high-temperature sintering process In be bound to reunite, therefore, production cost is very high；In addition, the specific surface area due to nano-titanium dioxide is very big, surface Can be also very big, the nano-titanium dioxide to complete is in coating system also very easy in the dispersion process of other materials It is poly-, cause photocatalysis effect to reduce and even fails.

For purifying formaldehyde, although occurring the product of some addition nano-titanium dioxides in existing coating, it is based on The problem that nano-titanium dioxide is easily reunited in preparation process, these coating products often only with only with adsorption function or Although only with photo-catalysis function or with absorption and light-catalysed dual function, technical difficulty is non-in its manufacturing process Chang great, production cost are very high；In addition, to be also easy to produce catalyst poisoning existing for nano-titanium dioxide in use for these coating As shortening its service life.

It is aqueous interior that the Chinese patent of Patent No. 201210573769.3 discloses a kind of Compound type photocatalyst air purification Wall coating, a kind of Compound type photocatalyst air purification aqueous inner wall paint, it is characterised in that：Including photocatalysis filler, polyurethane Lotion, propylene glycol phenylate, dispersant, stabilizer, wetting agent, water, mould inhibitor, antifoaming agent, levelling agent, thickener, it is nano oxidized Zinc or nano-stannic oxide are constituted.This interior wall coating utilizes in the air purifying paint formula that photocatalysis principle is developed only By a variety of photocatalyst substances of addition, reach light-catalysed purpose, but it does not have adsorption capacity, photocatalysis effect is poor, Single TiO₂With other materials are compound is also easy to produce agglomeration, in addition, being also easy to produce catalyst poisoning phenomenon, service life is short.

The Chinese patent of Patent No. 201110123361.1 discloses a kind of Novel anti-formaldehyde smell-clearing full-effective water-based inner wall Coating, including remove aldehyde lotion, polyurethane modified acrylic resin, bamboo charcoal powder, nano titanium dioxide photocatalyst, calcium carbonate and face Filler, antifoaming agent, dispersant, anti-settling agent, water and auxiliary agent, although what such coating was combined using physical absorption with chemical breakdown Method removes formaldehyde, but nano titanium dioxide photocatalyst is easily reunited in the preparation process of coating, and then influences it Catalytic performance, in addition, being also also easy to produce catalyst poisoning phenomenon, service life is short.

Therefore, developing a kind of PARA FORMALDEHYDE PRILLS(91,95) has aobvious particularly important of the coating products of long-acting catalytic effect.

Invention content

The purpose of the present invention is being directed to technological deficiency existing in the prior art, there is long-acting catalysis in order to reach PARA FORMALDEHYDE PRILLS(91,95) The purpose of effect provides a kind of absorption of silicon titanium aeroge and photocatalysis interior wall coating and preparation method thereof, interior wall coating profit With silica aerogel formaldehyde adsorption, nano-titanium dioxide photodissociation formaldehyde forms the pattern decomposed in absorption.

The technical solution adopted in the present invention is：

A kind of absorption of silicon titanium aeroge and photocatalysis interior wall coating, in parts by weight, including it is water A, batch mixing A-1, mixed Expect A-2, according to weight ratio meter, the water A：Batch mixing A-1, batch mixing A-2=1~3：2~6：1~3；

The batch mixing A-1 includes nano-titanium oxide comprehensive silicon aerogels powder, aerogel powder A, wetting agent A-1, wetting agent A-2, color stuffing A, the parts by weight of the aerogel powder A additions are the compound silica aerogel light of nano-titanium oxide The parts by weight of 0.02~0.25 times of catalyst powder parts by weight, the wetting agent A-1 additions are that nano-titanium oxide is compound The parts by weight of 0.5~3 times of silica aerogel photochemical catalyst powder parts by weight, the wetting agent A-2 additions are airsetting rubber powder The parts by weight of 0.5~2 times of body A parts by weight, the color stuffing A additions are the compound silica aerogel photocatalysis of nano-titanium oxide 0.5~3 times of agent powder parts by weight；

The batch mixing A-2 in parts by weight, includes the dispersion of the levelling agent A, 1~20 parts by weight of 1~12 parts by weight The styrene-acrylic emulsion of agent A, the preservative A of 1~10 parts by weight, the antifoaming agent A of 1~10 parts by weight, 10~50 parts by weight A, the elastic emulsion A of 5~40 parts by weight, the organosilicon-modified acrylic emulsion A of 5~40 parts by weight, coalescents A, thickener A, pH adjusting agent A, pH value are 7~8.5；Batch mixing A-2 is binder；

The parts by weight of coalescents A addition are styrene-acrylic emulsion A, elastic emulsion A, organic-silicon-modified The 0.1~12% of the sum of acrylic emulsion A parts by weight；

The parts by weight of the thickener A additions are styrene-acrylic emulsion A, elastic emulsion A, organic-silicon-modified third The 0.5~5% of the sum of olefin(e) acid latex A parts by weight；

The parts by weight of pH adjusting agent A addition are styrene-acrylic emulsion A, elastic emulsion A, organic-silicon-modified The 0.5~5% of the sum of acrylic emulsion A parts by weight.

Preferably, the color stuffing A be zinc oxide A, barium sulfate A, talcum powder A, diatomite A, one kind in dicalcium powder A or Several and titanium dioxide A.

Preferably, the titanium dioxide A is anatase titanium dioxide.

Preferably, the wetting agent A-1 is methanol A, ethyl alcohol A, propyl alcohol A, n-butanol A, one or more of amylalcohol A, The wetting agent A-2 is one or both of ethylene glycol A or propylene glycol A.

Preferably, the solid content of the styrene-acrylic emulsion A, elastic emulsion A, organosilicon-modified acrylic emulsion A >=60%, viscosity >=1000cps；The levelling agent A is polyether silicone levelling agent, and the antifoaming agent A active ingredients are hydrophobic Property silica, the coalescents A be trimethylpentanediol A, mono isobutyrate A, alcohol ester 12A one or more, institute It is anionic dispersing agent to state dispersant A, and the thickener A is hydroxyethyl cellulose A, one kind of hydroxymethyl cellulose A or two Kind.

Specifically, the preparation method of aerogel powder A, includes the following steps：

(A) mixed solution of silicon source and solvent is prepared

The sodium metasilicate B for the number 3.0~4.0 that rubs is taken to be fitted into reaction kettle, the water B progress that 1~3 times of sodium metasilicate B mass is added is dilute It releases, reaction kettle obtains sodium silicate solution B with the speed stirring 30min of 80~200r/min through 200 mesh screens；

The aqueous solution of sodium metasilicate is commonly called as waterglass, it is made of the alkali metal and silica of different proportion, changes Formula is R₂O·nSiO₂, R in formula₂O is alkali metal oxide, and n is the ratio of silica and alkali metal oxide molal quantity, The referred to as number that rubs of waterglass, the most commonly used is sodium silicate water glass Na₂O·nSiO₂；

(B) colloidal sol

It takes A sour, A acid metal salts is added in A acid and rare earth A hydrochlorates are added in a manner of spray to step after mixing Suddenly the sodium silicate solution B that (A) is obtained；The material in reaction kettle is carried out with the speed of 1200~2000r/min while spray The pH value of quickly stirring, control sodium silicate solution B is 1.5~3.0, and it is 15~30 nanometers to control its average pore size, obtains colloidal sol, 60~120min of this step used time；

Preferably, in above-mentioned steps (B), the A acid is sulfuric acid B, hydrochloric acid B, oxalic acid B or nitric acid B, 6 are adjusted to water B~ 15mol/L；

Preferably, in above-mentioned steps (B), the A acid metal salts are A acid zirconates or A acid aluminium salts；

Preferably, in above-mentioned steps (B), the rare earth A hydrochlorates are A acid cerium salt, A acid yttrium salt or A acid lanthanum salts；

A acid metal salts and rare earth A hydrochlorates are easy the moisture absorption, and metering can be caused inaccurate, so for its addition of accurate quantitative analysis Amount, in terms of oxide, the molar ratio of the two is 100 for A acid metal salts described in above-mentioned steps (B) and rare earth A hydrochlorates：1~6；Step Suddenly in (B) in the oxide of A acid metal salts and sodium metasilicate B silica molar ratio 2~5：100；For example, A acid metal salts are sulphur Sour aluminium B, in terms of its oxide, i.e., with the molar ratio of silica in aluminium oxide B and sodium metasilicate B for 2~5：100.

(C) gel

Sodium hydroxide B or ammonium hydroxide B is taken, it is 10~11.5 that water B, which is added, and is diluted to pH value, is added in a manner of spray to reaction In kettle；The material in reaction kettle is quickly stirred with the speed of 1200~2000r/min while spray, when in reaction kettle When the pH value of material is 4.5~5.5, spray is terminated, gel, 80~180min of this step used time are obtained；

(D) aging

3~10h of stirring is continued with the speed of 20~50r/min in reaction kettle, aging, control are carried out to the material in reaction kettle Material in reactor temperature processed is 35~50 DEG C；The mode that standing is usually used in the prior art carries out aging, takes 3~5 days, Gel can't be stirred, the reason is that the prior art needs to stand during generally believing aging, standing can Convenient for the structure growth of aeroge；

(E) solvent is replaced

It carries out continuing 60~180min of stirring in reaction kettle, while being added same with aging material in step (D) reaction kettle The displacement solvent B of volume, to displace remaining moisture；The prior art worries that stirring can destroy its structure, will not generally set It is stirred when changing, stewing process can be taken, cause to take longer；Preparation method provided by the invention is carried out when solvent is replaced 60~180min is stirred, can greatly shorten period of a permutation, there is no destroyed microstructure；

Preferably, in above-mentioned steps (E), the described displacement solvent B is methanol B, acetone B, n-hexane B or heptane B one Kind or several mixtures.

(F) surface modification

It carries out continuing stirring in reaction kettle, while continuously adding and aging material same volume in step (D) reaction kettle Coupling agent B；By stirring 60~180min, the silica aerogel precursor B for being coated with displacement solvent B and coupling agent B is obtained；

The coupling agent B that above-mentioned steps (F) surface modification is added cements out the water in aeroge micropore, and coupling agent B is filled out It is charged into aeroge micropore, the stability of microcellular structure can be improved, improve the evenness of pore size；In addition, by pair plus Enter after different coupling agent B is surface modified, aeroge hydrophobicity, hydrophilic sexual function can be adjusted.

Preferably, coupling agent B described in above-mentioned steps (F) be hexamethyldisilazane B, bis- (trimethylsilyl) acetamide B, Methoxytrimethylsilane B, dimethoxydimethylsilane B, phenyl triethoxysilane B, phenyltrimethoxysila,e B, second The one or more of alkenyl trimethoxy silane B, methyltriethoxysilane B and methyl trimethoxy oxygroup alkane B；

Preferably, the stirring described in above-mentioned steps (E) or step (F) is to be stirred in reaction kettle；

Preferably, stirring described in above-mentioned steps (E) or step (F) provides for reaction kettle center quickly forward stirs The periphery of (high speed shear disk), reaction kettle center provides baffle plate to realize.

This silica aerogel precursor B is a kind of light porous amorphous inorganic nano material of structure-controllable, is had continuous Tridimensional network, porosity are up to 80% or more, and average pore size is 20nm or so, and specific surface area is more than 500 ㎡/g, density Less than 70kg/m³, thermal coefficient is less than 0.020W/ (mK) under normal temperature and pressure, than the thermal conductivity 0.022W/ (m of still air K) also low, be at present rare low cost, industrialization, low heat conductivity solid material；

Existing precursor silica aerogel presoma is to be made at high temperature under high pressure using supercritical drying process, life Production condition is harsh, complex process, dangerous big, and process units investment is big, and preparation efficiency is low, and raw material are with the silanol of high price It is main, it is of high cost；Silica aerogel presoma in the present invention is to prepare at normal temperatures and pressures, stabilization simple for process, safe, work Skill process is down to 30h from traditional 300h, and the process units investment of same production capacity is only the 1/20 of conventional method, the prices of raw materials 10 times lower than traditional silicon source or more, product cost is only the 1/10 of conventional method.

(G) preparation of silica aerogel powder B

Silica aerogel precursor B is put into drying kettle, nitrogen is filled in drying kettle and catches up with oxygen, until oxygen content in drying kettle Less than 3%, micro-wave vacuum then is carried out to the material in drying kettle；0.08~0.12mpa of negative pressure in drying kettle, temperature are 80~135 DEG C, the silica aerogel powder B of solid powder is made after dry, this silica aerogel powder B is to be used in batch mixing A Aerogel powder A；Silica aerogel precursor B is coated with displacement solvent B and coupling agent B, belongs to hydroxide, dry by microwave Become the oxide of solid powder after dry.

Preferably, in above-mentioned steps (G), 50~80 minutes microwave time of micro-wave vacuum, microwave frequency 2450MHZ ±10MHZ。

Preferably, the water A, water B are deionized water；Further decrease production cost.

Specifically, the nano-titanium oxide comprehensive silicon aerogels raw powder's production technology according to Prepared by the method described in ZL201410311741.1, include the following steps：

(I) aerogel particles C is sieved through 300 mesh, is soaked in 30~36h in 20 ° of ammonium hydroxide C, obtain material A；By rare earth nitre Hydrochlorate C is with 1：1 weight ratio is dissolved in deionized water C, and material B is obtained after filtering；

(II) scaling method due to titanium sulfate C in buying and standard are had nothing in common with each other, in order to which sulphur is more accurately added The amount of sour titanium C is converted into the amount of titanium oxide C as calibration means using titanium sulfate C；The weight ratio of titanium oxide C is converted into titanium sulfate C It is calculated as 5%, carries out required titanium sulfate C and weight ratio meter the deionized water C for being 95% to be mixed and made into solution；Solution is carried out It persistently stirs and is heated to 75~90 DEG C, constant temperature, speed of agitator control is kept to open ultrasound while 500~800r/min and shake It is dynamic, the material A that step (I) is produced at the uniform velocity is added in 60~90min, the amount that material A is added is determined by the weight of silica aerogel C Fixed, the weight of silica aerogel C is 0.36~0.5 times of the weight that titanium oxide C is converted into titanium sulfate C；

(III) it is to be adjusted to 8.0~9.5 to continuously add appropriate ammonium hydroxide C by pH value, then with the stirring of 30~80r/min speed Degree continues to stir, and stirring while opens ultrasonic vibration；60~90min is reacted, slurry C is obtained；

(IV) slurry C is filtered, washed, the pH value for controlling slurry C is 7~8, while making the slurry C after being filtered, washed Solid content ＞ 40%；Then, its 2 times of deionized water C is added, while being added and expecting that (rare earth nitrades C is easy the moisture absorption to B, can cause Inaccuracy is measured, so for the addition of accurate quantitative analysis rare earth nitrades C, by rare earth nitrades C in terms of rare earth oxide), Wherein, weight of the material B middle rare earth nitrate C in terms of oxide is the 3~7% of titanium oxide C weight, and speed of agitator is controlled 500 ~800r/min, when stirring is warming up to 75~90 DEG C, it is 7~7.5 that ammonium hydroxide C tune pH value, which is added dropwise, and hydrogen peroxide C is added, hydrogen peroxide C's Addition is expect weight of the B middle rare earth nitrate C in terms of oxide 10%, is stirred to react 30 minutes；To object after washing, filtering When expecting solid content ＞ 40%, collects and obtain slurry D；

At this moment, rare earth nitrades C and ammonium hydroxide C, which reacts, is changed into rare-earth hydroxide C, and titanium sulfate C is reacted with ammonium hydroxide C Generate titanium hydroxide C；Rare-earth hydroxide C is coated on the surface of titanium hydroxide C, is filled in the specific surface of silica aerogel C jointly On, it is filled with rare-earth hydroxide C and titanium hydroxide C inside the microcellular structure of silica aerogel C；Rare-earth hydroxide C and hydrogen-oxygen The zwitterion for changing titanium C is combined closely, and by being spray-dried with after high temperature sintering, rare-earth hydroxide C changes with titanium hydroxide C For nano-titanium oxide/rare earth oxide solid solution C (its volume-diminished to original 0.2~0.4 times), make that silica aerogel C's is micro- Pore structure, which is appointed, so to be existed.

(V) slurry D is spray-dried, tubular type oscillation sintering furnace is entered after dry, adding in tubular type oscillation sintering furnace Hot temperature is 450~600 DEG C, and the titanium hydroxide C and rare-earth hydroxide C that are coated on silica aerogel C Surface is made to be converted into nanometer Grade anatase type titanium oxide C and rare earth oxide C, finally obtains nano-titanium oxide and silicon gas compound rare earth oxide solid solution C Gel photocatalyst is the nano-titanium oxide comprehensive silicon aerogels powder used in batch mixing A.

The nano-titanium oxide of preparation has higher specific surface area with silica aerogel photochemical catalyst compound lanthanum solid solution C, Adsorption capacity is stronger, makes its catalytic performance higher.

Preferably, the rare earth nitrades C in above-mentioned steps (I) is lanthanum nitrate C, cerous nitrate C or neodymium nitrate C.

Preferably, the frequency of ultrasonic vibration is 20~35KHz in above-mentioned steps (II) or step (III), and power density is 0.3~0.8W/cm².Mixing when stirring can be made more uniform using ultrasonic vibration, promote the formation of nano-scale particle without Reunite, covering material can be made equably to coat silica aerogel C.

Preferably, 200~300 DEG C of spray drying inlet temperature used, outlet temperature 100~120 in above-mentioned steps (V) ℃。

Preferably, in above-mentioned steps (V) tubular type oscillation sintering furnace angle of inclination be 5~8 °, vibration frequency be 300~ 380 beats/min.

A kind of preparation method of silicon titanium aeroge absorption and photocatalysis interior wall coating, includes the following steps：

(1) aerogel powder A, the wetting agent A-2 that parts by weight are 0.5~2 times of aerogel powder A parts by weight are being turned In the sand mill that speed is 800~2500r/min after 20~80min of grinding, cross the mesh sieve of 200 mesh~1000, obtain grain size (grain size with D₅₀Indicate) be 500nm~2000nm aerogel powder A and wetting agent A-2 mixture；

Grain size D₅₀Contact angle for the aerogel powder A of 500nm~2000nm is more than 140 °, is super hydrophobic material, makes painting The surface of material is not infected with dust, moisture, to play self-cleaning function；

Wetting agent A-2 is added in aerogel powder A process of lapping to grind the purpose is to prevent from grinding aerogel particle The aerogel powder A epigranulars ground, grinding effect are good；In addition, in process of lapping, airsetting is occupied using wetting agent A-2 The porous structure of rubber powder body A interior three-dimensional solid spaces prevents binder or other materials in dope preparing process from entering it Three-dimensional space blocks porous structure, and after coating is sprayed on wall, wetting agent A-2 volatilizees naturally, inside aerogel powder A Its three-dimensional space structure is still maintained, ensures the performance of its self-cleaning function；

(2) nano-titanium oxide comprehensive silicon aerogels powder, wetting agent A-1 are added in kneader and are stirred Even, speed of agitator is 30~250 revs/min, and the stirring used time is 20~50 minutes, is then by grain size obtained by step (1) again The mixture of the aerogel powder A and wetting agent A-2 of 500nm~2000nm, which are added in kneader, to stir evenly, speed of agitator It it is 30~250 revs/min, the stirring used time is 20~50 minutes；In terms of aerogel powder A before being ground up, sieved, aerogel powder A The parts by weight of addition are 0.02~0.25 times of nano-titanium oxide comprehensive silicon aerogels powder parts by weight, described The parts by weight of wetting agent A-1 additions are the 0.5~3 of nano-titanium oxide comprehensive silicon aerogels powder parts by weight Times；

Nano-titanium oxide comprehensive silicon aerogels powder interior three-dimensional solid space structure adsorbs it urges with light Change active performance to play an important roll, binder or other materials are sealed into its three-dimensional space in dope preparing process It can be made to reduce or lose absorption and photocatalytic activity after stifled porous structure；The effect of wetting agent A-1 is wetting nano-titanium oxide It is three-dimensional empty to occupy nano-titanium oxide comprehensive silicon aerogels powder interior three-dimensional for comprehensive silicon aerogels powder Between porous structure, prevent in dope preparing process binder or other materials to enter its three-dimensional space and block porous knot Structure, after coating is sprayed on wall, wetting agent A-1 volatilizees naturally, in nano-titanium oxide comprehensive silicon aerogels powder Portion still maintains its three-dimensional space structure, plays absorption and photocatalytic activity；

(3) color stuffing A, water A are added in kneader and are mediated uniformly, it is 100~500 revs/min to mediate rotating speed, is mediated Used time is 10~50 minutes, and the parts by weight of the color stuffing A additions are nano-titanium oxide comprehensive silicon aerogels powder 0.5~3 times of body weight number, according to weight ratio meter, the water A：(the compound silica aerogel of aerogel powder A+ nano-titanium oxides Photochemical catalyst powder+wetting agent A-1+ wetting agent A-2+ color stuffing A)=1~3：2~6；

(4) by the levelling agent A of 1~12 parts by weight, the dispersant A of 1~20 parts by weight, the preservative A of 1~10 parts by weight, 1 The antifoaming agent A of~10 parts by weight, the styrene-acrylic emulsion A of 10~50 parts by weight, the elastic emulsion A of 5~40 parts by weight, 5 Organosilicon-modified acrylic emulsion A, coalescents A, thickener A, the pH adjusting agent A of~40 parts by weight are stirred evenly after mixing Batch mixing A-2, speed of agitator are 150~850r/min, and the stirring used time is 10~50min, and the pH value of batch mixing A-2 is 7~8.5；It presses According to weight ratio meter, the water A：Batch mixing A-2=1~3：1~3；The parts by weight of coalescents A additions are Styrene And Chloroalkyl Acrylates The 0.1~12% of the sum of latex A, elastic emulsion A, organosilicon-modified acrylic emulsion A parts by weight, the weight of thickener A additions Amount number is styrene-acrylic emulsion A, elastic emulsion A, the sum of organosilicon-modified acrylic emulsion A parts by weight 0.5~ 5%, the parts by weight that pH adjusting agent A is added are styrene-acrylic emulsion A, elastic emulsion A, organosilicon-modified acrylic are newborn The 0.5~5% of the sum of liquid A parts by weight；

(5) mixture obtained by step (2), step (3), step (4) is put into shear mixer and is stirred evenly, stirred Rotating speed is 50~650r/min, and the stirring used time is 25~55min；

(6) by mixture Over emulsfication pump homogenizing material obtained by step (5), the rotating speed of emulsification pump is 500~2500r/min, It is 10-20min to spend the pump used time；Mixture is crossed 200-300 mesh sieve and is applied with photocatalysis interior wall to get the absorption of silicon titanium aeroge after emulsification Material.

Preferably, in the step (4), thickener A diluted using the preceding water D using 1~5 times of weight and stand 5h~ 24h；In traditional coating preparation process, cellulose thickener A is to be directly appended to use in coating without dilution, due to fiber Plain class thickener A is polysaccharose substance, coating be susceptible to local viscosity it is excessive and the phenomenon that lump, influence the performance of coating； Thickener A is diluted with water and places and reuses after a period of time in the present invention, avoids coating from local viscosity occur excessive and tie Block, paint ingredient is uniform, and performance is highly stable.

The operation principle of the present invention

The silica aerogel of nanostructure can be used as new gas filtering body, and the material hole is big unlike other materials Small to be evenly distributed, the porosity is high, and is accumulated than table with king-sized, is a kind of efficient gas filtering material；It is first in the present invention It then using the photocatalysis of nano-titanium dioxide, will be adsorbed first with the porosity characteristic absorption and capture formaldehyde of aeroge It is carbon dioxide and water to capture Formaldehyde decomposition, and formaldehyde is fundamentally given to photodissociation elimination, such to be decomposed in absorption, is successfully reached To the effect of long-acting removal formaldehyde.

The beneficial effects of the present invention are：

1, the present invention is added to nano-titanium oxide comprehensive silicon aerogels powder in raw material in preparing for coating, The techniques such as ultrasonic vibration, spray drying, tubular type oscillation high temperature sintering are added in the preparation process of photochemical catalyst powder, are solved Nano size Titania is easy the technical issues of spontaneously forming aggregate, and the photochemical catalyst powder photocatalysis performance in the present invention is good, Simultaneously formaldehyde is catalytically decomposed in absorption that can be long-acting, potent；

2, in addition to formaldehyde, coating in the present invention is to other volatile organic compounds (abbreviation VOC) existing for interior, thin Bacterium, virus, PM2.5 also have long-acting removal effect；

3, it is 500nm~2000nm aerogel powder A to be ground to grain size, and coating is made to have self-cleaning function, protection absorption With catalysis material, the only pollutants such as formaldehyde can be adsorbed and degraded by photochemical catalyst, prevent photochemical catalyst to be poisoned, light Catalyst service life is long, and coating is permanently effective；

4, nano-titanium oxide comprehensive silicon aerogels powder is nano-titanium dioxide and silica aerogel (nanometer TiO₂/ Si aeroges) complex form, coating when in use, utilizes the pollutants such as silica aerogel formaldehyde adsorption, nano-TiO₂Light The pollutants such as formaldehyde are solved, is decomposed in absorption, achievees the effect that long-acting decomposition, using the form decomposed in absorption, are solved After sorbing material adsorption saturation the problem of disabler, the pollutant of absorption will not discharge again；

5, nano-titanium oxide comprehensive silicon aerogels powder uses nano-TiO₂The compound form of/Si aeroges, Have the characteristics that two aspects of potent property and long-term effect, for removing formaldehyde：First, it is potent, under fluorescent light in 48 hours Removal rate >=95% of PARA FORMALDEHYDE PRILLS(91,95)；Second, long-acting, aeroge is responsible for formaldehyde adsorption, TiO₂It is responsible for photocatalysis Decomposition, by formaldehyde point Xie Chengshui and carbon dioxide decompose in absorption, then adsorb and decompose again, formaldehyde is constantly removed, even if in not illumination Under environment, still can formaldehyde adsorption, have and the formaldehyde of absorption decomposed again when illumination；

6, of the invention by nano-TiO₂It is supported on silica aerogel surface, effect has following two points：

(1) it is said from material preparation angle, makes nano-TiO₂Uniform particle is dispersed in aerogel particle surfaces, and due to gas The inhibition of gel carrier, nano-TiO₂Particle is difficult to the reunion that attracts each other；In addition, since aeroge carrier itself is contained The ingredients such as amorphous silica, iron oxide, aluminium oxide make nano-TiO₂Energy gap reduce, it is seen that the utilization rate of light carries Height, namely significantly improve the photocatalysis performance of material under visible light；

(2) it is said from application performance angle, nano-titanium dioxide is loaded on silica aerogel, silica aerogel is made not only to have Absorption captures the function for the aerial formaldehyde molecule that dissociates, and is fixed on aeroge surface or nano-pore by uniform load The nano-TiO of wall₂Photocatalysis the formaldehyde that capture is adsorbed in aeroge nano aperture can be decomposed in illumination condition； Not only it had solved aeroge itself and has not had photocatalytic degradation function, but also overcome the pure nano-titanium dioxide absorption of monodisperse and capture work( The deficiency of energy；The function that absorption captures the pollutants such as the functions of the pollutants such as formaldehyde and formaldehyde degradation by photocatalytic oxidation process is set to roll into one； Although while using sorbing material such as aeroge and pure nano-TiO₂Also the combination that can realize two kinds of functions, still, due to nanometer TiO₂Dosage seldom and be difficult to evenly dispersed in sorbing material, nano-TiO₂Particle may be from adsorbate aerogel particle Distance farther out, because the limitation of operating distance is difficult to degrade the pollutants such as the formaldehyde adsorbed in aerogel particle；This material is due to receiving Rice TiO₂Particle just in the surface of aerogel particle or hole wall, can closely act on the pollutants such as the formaldehyde that absorption captures, because This, photocatalytic degradation efficiency is higher, and dosage is few；

7, it is 10~20nm that titanium dioxide, which selects anatase titanium dioxide, crystal grain, in the present invention, is Nano titanium dioxide, can be equal Even load is fixed on aerogel particle surfaces, not will produce agglomeration, and photocatalysis is good, adsorbs the effect ratio of pernicious gas Similar product, such as activated carbon, diatom ooze are higher by 20~50 times or more；

8, sunlight and light can be used as the light source of photodissociation, applied widely；

9, this product is white liquid coating, and product viscosity is 800~1500cps；

10, product of the present invention is water paint, and the volatile organic solvents such as containing benezene, ethers, formaldehyde, not pollution-free, symbol Close modern environmental protection concept；

11, the coalescents A in paint ingredient of the present invention, levelling agent A be in addition to the traditional function that it is applied in coating, Play the role of adjusting coating viscosity；

12, the operation principle that in the present invention prepared by silica aerogel powder B is：In the preparation method of silica aerogel precursor B, The A acid metal salts and rare earth A hydrochlorates being added in gel process can achieve the effect that toughening and improve silica aerogel heat resistance； Aging and solvent swap step are carried out in the state of stirring, are substantially increased reaction efficiency, are had compressed the process time, are fitted Close industrialization；The technique that solid powder silica aerogel is prepared using silica aerogel precursor B is dried using negative-pressure microwave Method carries out, and microwave can realize heat transfer pattern from the inside to the outside directly deeply to the microcellular structure of silica aerogel；Microwave " vibrations " in microcosmic meaning can be generated to the material in microcellular structure simultaneously, effectively avoid agglomeration；Negative pressure Under state, boiling point, evaporating point or the gasification point of the solvent in micropore can reduce；

13, compared with prior art, advantage has the following to the preparation method of silica aerogel powder B in the present invention：

(1) in recent years, there are some about the relevant report and patent for preparing silica aerogel under normal temperature and pressure in the prior art Document, but be to rest on laboratory preparatory phase mostly, technical process is longer, while process implementing narrow limits, it is difficult to real Existing large-scale industrialized production and application；The present invention provides the preparation methods under normal temperature and pressure, and it is relatively quiet to change the prior art Technique only applies in critical process process and stirs, speeded up to the hydrolysis, polycondensation and modification of aeroge, it is small to realize 30 When interior synthesis gas Gel Precursor technique, provide a kind of method that industrial batch prepares rare earth toughening silica aerogel, be A large amount of manufacture and use of aeroge provide premise；

(2) one of hinder the reason of aeroge development that be aeroge have reticular structure, but the structure in the prior art Edge it is relatively thin, more crisp, compression strength is low, and easy compression is caved in, and causes performance unstable；Present invention addition rare earth A hydrochlorates With A acid metal salts, the toughness of the material is improved, improves the intensity of silica aerogel；

(3) temperature in use of the silica aerogel of prior art preparation is relatively low, generally used below also relatively more steady at 500 DEG C Fixed, 500 DEG C or more the internal structure changes that can lead to silica aerogel cause thermal coefficient to decline；The present invention is sour with rare earth A is added Salt and A acid metal salts, improve the heat resistance of the material, improve the heat resisting temperature of silica aerogel；

(4) the methods of the prior art generally uses during preparing solid-state silica aerogel high temperature sintering, drying, meeting Lead to structure collapses or agglomeration in material sintering process, reduce the specific surface area of material, leverages its thermal coefficient； The present invention uses micro-wave vacuum, microwave can be real directly deeply to the microcellular structure of aeroge silica aerogel precursor B Heat transfer pattern from the inside to the outside is showed；Under negative pressure state, boiling point, evaporating point or the gasification point of the solvent in micropore can drop It is low；Microwave can generate microcosmic vibrations to the material in microcellular structure, effectively avoid caused by the methods of high temperature sintering, drying Material structure collapses or agglomeration phenomenon occur, effectively raise the specific surface area and thermal coefficient of material；

(5) nitrogen protection is filled with when micro-wave vacuum, negative pressure low temperature replaces solvent or coupling to carry out safe retrieving Agent recycles, to reduce manufacturing cost.Be filled with nitrogen protection when the micro-wave vacuum, and under negative pressure low-temperature condition into Row；Micro-wave vacuum makes displacement solvent in microcellular structure or coupling agent gasify in negative pressure state, by it in low temperature shape State liquefies, and can realize that safe retrieving recycles, to reduce process costs.

Specific implementation mode

One, nano-TiO₂/ Si aerogel composites degradation removal indoor pollutant (comprising VOC, bacterium, virus, PM2.5 mechanism), illustrates by taking formaldehyde as an example：

Formaldehyde is in nano-TiO₂/ Si aerogel composite superficial degradations are divided into two processes：(1) formaldehyde molecule is compound The adsorption process of material surface；(2) formaldehyde molecule of composite material surface is adsorbed under light illumination by optical active substance TiO₂Drop The process of solution.

When energy is more than TiO₂The photon irradiation of energy gap is in nano-TiO₂When the aerogel composite surfaces /Si, it is in TiO₂The electronics of valence band will be excited on conduction band, to generate the free-moving light of high activity in valence band and conduction band respectively Raw electrons and holes；Due to the TiO of composite material surface load₂It is nanometer particle, therefore the electrons and holes that light excitation generates Can be quickly from vivo migration to surface, hole is strong oxidizer, can will be adsorbed on TiO₂The hydroxyl and water oxygen on surface For OH；And conduction band electron is strong reductant, is attracted to TiO₂The dissolved oxygen on surface captures and forms O₂；Part O₂ Chain reaction can be continued through and generate OH；The OH and O of generation₂With stronger oxidisability, it is documented that, TiO₂Light The OH free radicals that catalysis reaction generates have the reaction energy of 402.8MJ/mol, all kinds of chemical bond energys higher than in organic compound, Such as：C-C (83), C-H (99), C-N (73), C-O (80), N-H (93), H-O (111) etc., thus generate OH and O₂The c h bond that formaldehyde can be attacked generates new free radical with its active H atom, excites chain reaction, finally makes the Formaldehyde decomposition be Innocuous substance.

Nano-TiO₂When/Si aerogel composite Photo-Catalytic Degradation of Formaldehyde, active OH and O₂Oxygen is played jointly Change acts on, and first oxidizes the formaldehyde into as formic acid, is finally decomposed to water and carbon dioxide, decomposition mechanism is as follows：

HCHO+·OH→·CHO+H₂O

·CHO-+·OH→HCOOH

Two, with reference to embodiment, the invention will be further described：

Embodiment 1-8

1, a kind of formula of silicon titanium aeroge absorption and photocatalysis interior wall coating, including water A, batch mixing A-1, batch mixing A-2, are pressed According to weight ratio meter, the water A：Batch mixing A-1, batch mixing A-2=1~3：2~6：Component proportion in being formulated in 1~3, embodiment 1-8 Detail is shown in Table 1；

The component proportion detail list of silicon titanium aeroge absorption and photocatalysis interior wall coating in 1 embodiment 1-8 of table

Batch mixing A-1 include nano-titanium oxide comprehensive silicon aerogels powder, aerogel powder A, wetting agent A-1, The parts by weight of wetting agent A-2, color stuffing A, aerogel powder A additions are nano-titanium oxide comprehensive silicon aerogels powder The parts by weight of 0.02~0.25 times of body weight number, wetting agent A-1 additions are that the compound silica aerogel light of nano-titanium oxide is urged The parts by weight of 0.5~3 times of agent powder parts by weight, wetting agent A-2 additions are the 0.5 of aerogel powder A parts by weight ~2 times, the parts by weight of color stuffing A additions are the 0.5 of nano-titanium oxide comprehensive silicon aerogels powder parts by weight ~3 times, the component detail of batch mixing A-1 is shown in Table 2 in embodiment 1-8；

The component proportion detail list of batch mixing A-1 in 2 embodiment 1-8 of table

Batch mixing A-2 in parts by weight, including the dispersant A of the levelling agent A of 1~12 parts by weight, 1~20 parts by weight, 1 The preservative A of~10 parts by weight, the antifoaming agent A of 1~10 parts by weight, the styrene-acrylic emulsion A of 10~50 parts by weight, 5~ The elastic emulsion A of 40 parts by weight, the organosilicon-modified acrylic emulsion A of 5~40 parts by weight, coalescents A, thickener A, pH tune Agent A is saved, pH value is 7~8.5；

Wherein, the parts by weight of coalescents A additions be styrene-acrylic emulsion A, it is elastic emulsion A, organic-silicon-modified The 0.1~12% of the sum of acrylic emulsion A parts by weight；The parts by weight of thickener A addition be styrene-acrylic emulsion A, The 0.5~5% of the sum of elastic emulsion A, organosilicon-modified acrylic emulsion A parts by weight；The parts by weight of pH adjusting agent A additions It is the 0.5~5% of the sum of styrene-acrylic emulsion A, elastic emulsion A, organosilicon-modified acrylic emulsion A parts by weight, it is real The component detail for applying batch mixing A-2 in a 1-8 is shown in Table 3；

The component proportion detail list of batch mixing A-2 in 3 embodiment 1-8 of table

Color stuffing A is one or more of zinc oxide A, barium sulfate A, talcum powder A, diatomite A, dicalcium powder A and titanium white Powder A, titanium dioxide A are anatase titanium dioxide, and the specific constituents of color stuffing A and each component dosage are shown in Table 4 in embodiment 1-8；

The specific constituents of color stuffing A and each component detailed list of usage in 4 embodiment 1-8 of table

Solid content >=60% of styrene-acrylic emulsion A, elastic emulsion A, organosilicon-modified acrylic emulsion A, viscosity Styrene-acrylic emulsion A, elastic emulsion A, organosilicon-modified acrylic emulsion A are specifically bright in >=1000cps, embodiment 1-8 Carefully it is shown in Table 5；

Styrene-acrylic emulsion A, elastic emulsion A, organosilicon-modified acrylic emulsion A are detailed in 5 embodiment 1-8 of table Table

Wetting agent A-1 is one or more of methanol A, ethyl alcohol A, propyl alcohol A, n-butanol A, amylalcohol A, and wetting agent A-2 is One or both of ethylene glycol A or propylene glycol A, the specific ingredient detail of wetting agent A-1, wetting agent A-2 is shown in Table in embodiment 1-8 6；

The specific ingredient detail list of wetting agent A-1, wetting agent A-2 in 6 embodiment 1-8 of table

Water A is deionized water；

Levelling agent A is polyether silicone levelling agent, and antifoaming agent A active ingredients are hydrophobic silica；

Coalescents A is the one or more of trimethylpentanediol A, mono isobutyrate A, alcohol ester 12A, and dispersant A is the moon Ionic dispersant, thickener A are the one or two of hydroxyethyl cellulose A, hydroxymethyl cellulose A, are formed a film in embodiment 1-8 The specific ingredient detail of auxiliary agent A, thickener A is shown in Table 7.

The specific ingredient detail list of coalescents A, thickener A in 7 embodiment 1-8 of table

2, the preparation method of silicon titanium aeroge absorption and photocatalysis interior wall coating, carries out in accordance with the following steps：

(1) each component is weighed according to the dosage in above-mentioned formula；

(2) by aerogel powder A, wetting agent A-2 rotating speed be 800~2500r/min sand mill in grinding 20~ After 80min, the mesh sieve of 200 mesh~1000 is crossed, mixing for the aerogel powder A and wetting agent A-2 that grain size is 500nm~2000nm is obtained Close object；

(3) nano-titanium oxide comprehensive silicon aerogels powder, wetting agent A-1 are added in kneader and are stirred Even, first speed of agitator is 30~250r/min, first to stir the used time for 20~50min, then again by grain size obtained by step (2) It is added in kneader and stirs evenly for the mixture of the aerogel powder A and wetting agent A-2 of 500nm~2000nm, it is secondary to stir Mix rotating speed is 30~250r/min, and the secondary agitation used time is 20~50min；

(4) color stuffing A, water A are added in kneader and are mediated uniformly, kneading rotating speed is 100~500r/min, mediates and uses When be 10~50min；

(5) thickener A is diluted using the deionized water D of 1~5 times of weight and is stood 5h-24h；By levelling agent A, dispersant A, preservative A, antifoaming agent A, styrene-acrylic emulsion A, elastic emulsion A, organosilicon-modified acrylic emulsion A, coalescents A, batch mixing A-2, the pH of batch mixing A-2 are stirred evenly to obtain after the thickener A, pH adjusting agent A mixing after deionized water is diluted and stood Value is 7~8.5, and specific pH value is shown in Table the component proportion detail list of batch mixing A-2 in 3 embodiment 1-8；Speed of agitator be 150~ 850r/min, stirring used time are 10~50min；

(6) mixture obtained by step (3), step (4), step (5) is put into shear mixer and is stirred evenly, stirred Rotating speed is 50~650r/min, and the stirring used time is 25~55min；

(7) by mixture Over emulsfication pump homogenizing material obtained by step (6), the rotating speed of emulsification pump is 500~2500r/min, It is 10~20min to spend the pump used time；Mixture crosses 200~300 mesh sieve to get the absorption of silicon titanium aeroge and photocatalysis interior wall after emulsification Coating；Variable parameter detail in embodiment 1-8 in step (2)-(7) is shown in Table 8.

Variable parameter detail list in 8 embodiment 1-8 of table in step (2)-(7)

3, the absorption of silicon titanium aeroge and the grain size D that uses in photocatalysis interior wall coating₅₀For the aeroge of 500nm~2000nm Powder A, specific preparation process are as follows：

(A) mixed solution of silicon source and solvent is prepared

It takes the waterglass B for the number 3.0~4.0 that rubs to be fitted into reaction kettle, the deionized water B of 1~3 times of waterglass B mass is added It is diluted, reaction kettle is stirred 30 minutes with 80~200 revs/min of speed, through 200 mesh screens, obtains water glass solution B；

(B) colloidal sol

It takes A sour, A acid metal salts is added in A acid and rare earth A hydrochlorates are added in a manner of spray to step after mixing Suddenly the water glass solution B that (A) is obtained；While spray with 1200~2000 revs/min of speed to the material in reaction kettle into Row quickly stirring, control ph to 1.5~3.0 stop spray, and spray time was controlled at 60~120 minutes, obtained colloidal sol；

A acid is sulfuric acid B, hydrochloric acid B, oxalic acid B or nitric acid B, its concentration is adjusted to 6~15mol/L with deionized water B；

A acid metal salts are A acid zirconates or A acid aluminium salts, and rare earth A hydrochlorates are A acid cerium salt, A acid yttrium salt or A acid lanthanum salts；

In terms of oxide, the molar ratio of the two is 100 for A acid metal salts and rare earth A hydrochlorates：1~6；

The molar ratio 2~5 of silica in the oxide and water glass solution B of A acid metal salts：100；

(C) gel

Sodium hydroxide B or ammonium hydroxide B is taken, it is 10~11.5 that deionized water B, which is added, and is diluted to pH value, is added in a manner of spray In to step (B) reaction kettle in gained colloidal sol；With 1200~2000 revs/min of speed to the material in reaction kettle while spray It is quickly stirred, when the pH value of material in reactor is 4.5~5.5, sprays 80~180 minutes used times, obtain gel；

(D) aging

Stirring is continued 3~10 hours with 20~50 revs/min of speed in reaction kettle, the material in reaction kettle is carried out old Change, control material in reactor temperature is 35~50 DEG C；

(E) solvent is replaced

The displacement solvent B with aging material same volume in step (D) reaction kettle is added while stirring in reaction kettle, with Remaining moisture is displaced, is stirred 60~180 minutes；

Replace one or more mixtures that solvent B is methanol B, acetone B, n-hexane B or heptane B；

(F) surface modification

It carries out continuing stirring in reaction kettle, while continuously adding and aging material same volume in step (D) reaction kettle Coupling agent B obtained the silica aerogel for being coated with displacement solvent B and coupling agent B after surface modification by stirring 60~180 minutes Precursor B；

Stirring described in step (E) or step (F) is that heart offer is quickly forward stirred in a kettle, in reaction kettle The periphery of the heart provides baffle plate；

Coupling agent B is hexamethyldisilazane B, bis- (trimethylsilyl) acetamide B, methoxytrimethylsilane B, dimethoxy Base dimethylsilane B, phenyl triethoxysilane B, phenyltrimethoxysila,e B, vinyltrimethoxysilane B, methyl three One or more mixtures of Ethoxysilane B and methyl trimethoxy oxygroup alkane B；

(G) preparation of silica aerogel powder B

The silica aerogel precursor B for being coated with displacement solvent B and coupling agent B is put into progress microwave vacuum in drying kettle to do It is dry, it is filled with nitrogen in drying kettle and catches up with oxygen until oxygen content is less than 3%, 0.08~0.12mpa of negative pressure, temperature is 80~135 DEG C, Microwave frequency 2450MHZ ± 10MHZ, the solid-state silica aerogel powder B for obtaining toughening in 50~80 minutes；

The variable parameter of each embodiment and concrete numerical value are shown in Table 9 in the preparation method of aerogel powder A in embodiment 1-8.

The design parameter detail list that step (A)~(G) is used in the preparation method of aerogel powder A in 9 embodiment 1-8 of table

3, the absorption of silicon titanium aeroge and the compound silica aerogel photocatalysis of nano-titanium oxide that uses in photocatalysis interior wall coating Agent raw powder's production technology is prepared according to the method described in ZL 201410311741.1, is included the following steps：

(I) aerogel particles C is sieved through 300 mesh, being soaked in 20 ° of ammonium hydroxide C, (liquefied ammonia content is 20%, and pure water content is 80%) 30~36h in referred to as expects that A is spare；Rare earth nitrades C selection lanthanum nitrates C, cerous nitrate C or neodymium nitrate C；By rare earth nitric acid Salt C is with 1：1 weight ratio is dissolved in deionized water C, spare after filtering to be known as material B；

(II) it by the mixed solution of titanium sulfate C (20% oxide meter) and deionized water C 500kg, is heated to while stirring 75~90 DEG C, constant temperature, speed of agitator control is kept to open ultrasonic vibration while 500~800 revs/min, ultrasonic vibration Frequency F is 20~35KHz, and power density P is 0.3~0.8W/cm², silica aerogel (material is at the uniform velocity added in 60~90 minutes A), the reaction was continued after adding a period of time；

(III) be added appropriate ammonium hydroxide C (pH value of system is to be adjusted to 8.0~9.5 by a concentration of 20%), then with 30~ 80 revs/min of mixing speed continues to stir, and stirring while opens ultrasonic vibration；Reaction 60~90 minutes, obtains slurry C；

(IV) slurry C is filtered, washed, it is 7~8 to make the pH value of slurry C, and filter material makes solid content ＞ 40%；Then, Its 2 times of deionized water C is added, while material B is added, wherein weight of the material B middle rare earth nitrate C in terms of oxide is oxidation The 3~7% of titanium C weight, speed of agitator is controlled at 500~800 revs/min, and when stirring is warming up to 75~90 DEG C, ammonium hydroxide C is added dropwise It is 7~7.5 to adjust pH value, and hydrogen peroxide C is added, is stirred to react 30 minutes；When after washing, filtering to material solid content ＞ 40%, receive Collect and obtains slurry D；

(V) slurry D is spray-dried, dry 200~300 DEG C of inlet temperature, 100~120 DEG C of outlet temperature, so Enter tubular type afterwards and vibrate stove, the heating temperature in stove is 450~600 DEG C, makes the titanium hydroxide C for being coated on silica aerogel C Surface Be converted into nano-scale anatase titanium oxide C and rare earth oxide C with rare-earth hydroxide C, finally obtain nano-titanium oxide with it is dilute Silica aerogel photochemical catalyst compound native oxide solid solution C is the compound silica aerogel of nano-titanium oxide used in batch mixing A Photochemical catalyst powder；Step (I) in nano-titanium oxide comprehensive silicon aerogels raw powder's production technology in embodiment 1-8 Each variable parameter and concrete numerical value are shown in Table 10 in~(V).

Step (I) in nano-titanium oxide comprehensive silicon aerogels raw powder's production technology in 10 embodiment 1-8 of table The design parameter detail list that~(V) uses

Three, performance detection

Purifying formaldehyde performance, anti-microbial property and catalytic decomposition methylene blue are carried out to the coating products in embodiment 1-8 Performance be detected, it is specific to detect foundation and testing result is shown in Table 11, table 12.

Product clean-up effect detection foundation and testing result detail list in 11 embodiment 1-8 of table

By data in table 11 it is found that the persistence of the clean-up effect of product PARA FORMALDEHYDE PRILLS(91,95) has reached 70 or more in embodiment 1-8, The purifying property of PARA FORMALDEHYDE PRILLS(91,95) has reached 88%, meets I class standard, and PARA FORMALDEHYDE PRILLS(91,95) has long-acting catalytic effect；In addition, also showing Good anti-microbial property.

Product detects foundation with existing product to methylene blue clean-up effect in 12 embodiment 1-8 of table and testing result is detailed Table

By data in table 12 it is found that identical in other conditions, existing absorption makes with light catalyzed coating in system Methylene blue fade 1 time after, then methylene blue is added in system, methylene blue can not fade；And product in embodiment 1-8 After the methylene blue in system can be made to fade 1 time, then 7 methylene blues are added in system, methylene blue can fade, i.e., So that methylene blue is continuously faded 8 times, there is long-acting catalytic effect.

In the present invention product be permanently effective functional material, using thickness in 100um hereinafter, finishing 48 hours after, Indoor pollutant can be up to state standards, and can realize long-acting decomposition, be examined through Chinese architecture material industry environmental monitoring center It surveys, product can remove 80% or more indoor air pollutants.

8 embodiments of the present invention are described in detail above, but the content is only the preferable implementation of the present invention Example should not be construed as limiting the practical range of the present invention.It is all according to all the changes and improvements made by the present patent application range Deng should all still fall within the scope of the patent of the present invention.

Claims

1. a kind of absorption of silicon titanium aeroge and photocatalysis interior wall coating, which is characterized in that in parts by weight, including it is water A, mixed Expect A-1, batch mixing A-2, according to weight ratio meter, the water A：Batch mixing A-1, batch mixing A-2=1~3：2~6：1~3；

The batch mixing A-1 include nano-titanium oxide comprehensive silicon aerogels powder, aerogel powder A, wetting agent A-1, Wetting agent A-2, color stuffing A, the parts by weight of the aerogel powder A additions are the compound silica aerogel photocatalysis of nano-titanium oxide The parts by weight of 0.02~0.25 times of agent powder parts by weight, the wetting agent A-1 additions are nano-titanium oxide comprehensive silicon gas The parts by weight of 0.5~3 times of gel photocatalyst powder parts by weight, the wetting agent A-2 additions are aerogel powder A weights The parts by weight of measure number 0.5~2 times, the color stuffing A additions are nano-titanium oxide comprehensive silicon aerogels powder 0.5~3 times of body weight number；

The preparation method of aerogel powder A, includes the following steps：

（A）Prepare the mixed solution of silicon source and solvent

The sodium metasilicate B for the number 3.0~4.0 that rubs is taken to be fitted into reaction kettle, the water B that 1~3 times of sodium metasilicate B mass is added is diluted, instead Kettle is answered to obtain sodium silicate solution B through 200 mesh screens with the speed stirring 30min of 80~200r/min；

（B）Colloidal sol

It takes A sour, A acid metal salts is added in A acid and rare earth A hydrochlorates are added in a manner of spray to step after mixing （A）Obtained sodium silicate solution B；The material in reaction kettle is carried out soon with the speed of 1200~2000r/min while spray The pH value of speed stirring, control sodium silicate solution B is 1.5~3.0, obtains colloidal sol；

（C）Gel

Sodium hydroxide B or ammonium hydroxide B is taken, it is 10~11.5 that water B, which is added, and is diluted to pH value, is added in a manner of spray to reaction kettle In；The material in reaction kettle is quickly stirred with the speed of 1200~2000r/min while spray, when object in reaction kettle When the pH value of material is 4.5~5.5, spray is terminated, gel is obtained；

（D）Aging

3~10h of stirring is continued with the speed of 20~50r/min in reaction kettle, aging is carried out to the material in reaction kettle, control is anti- It is 35~50 DEG C to answer material temperature in kettle；

（E）Solvent is replaced

It carries out continuing 60~180min of stirring, while addition and step in reaction kettle（D）Aging material same volume in reaction kettle Displacement solvent B, to displace remaining moisture；

（F）Surface modification

It carries out continuing stirring in reaction kettle, while continuously adding and step（D）The coupling of aging material same volume in reaction kettle Agent B；By stirring 60~180min, the silica aerogel presoma for being coated with the rare earth toughening of displacement solvent B and coupling agent B is obtained B；

（G）The preparation of silica aerogel powder B

Silica aerogel precursor B is put into drying kettle, nitrogen is filled in drying kettle and catches up with oxygen, until oxygen content is less than in drying kettle 3%, micro-wave vacuum then is carried out to the material in drying kettle；0.08~0.12mpa of negative pressure in drying kettle, temperature be 80~ 135 DEG C, the silica aerogel powder B of solid powder is made after dry, silica aerogel powder B is aerogel powder A.

2. silicon titanium aeroge absorption according to claim 1 and photocatalysis interior wall coating, it is characterised in that：

The batch mixing A-2 in parts by weight, including the dispersant A of the levelling agent A of 1~12 parts by weight, 1~20 parts by weight, 1 The preservative A of~10 parts by weight, the antifoaming agent A of 1~10 parts by weight, the styrene-acrylic emulsion A of 10~50 parts by weight, 5~ The elastic emulsion A of 40 parts by weight, the organosilicon-modified acrylic emulsion A of 5~40 parts by weight, coalescents A, thickener A, pH tune Agent A is saved, pH value is 7~8.5；

The parts by weight of the coalescents A additions are styrene-acrylic emulsion A, elastic emulsion A, organic-silicon-modified propylene The 0.1~12% of the sum of sour latex A parts by weight；

The parts by weight of the thickener A additions are styrene-acrylic emulsion A, elastic emulsion A, organosilicon-modified acrylic The 0.5~5% of the sum of latex A parts by weight；

The parts by weight of the pH adjusting agent A additions are styrene-acrylic emulsion A, elastic emulsion A, organic-silicon-modified propylene The 0.5~5% of the sum of sour latex A parts by weight.

3. silicon titanium aeroge absorption according to claim 1 and photocatalysis interior wall coating, it is characterised in that：The color stuffing A is one or more of zinc oxide A, barium sulfate A, talcum powder A, diatomite A, dicalcium powder A and titanium dioxide A.

4. silicon titanium aeroge absorption according to claim 1 and photocatalysis interior wall coating, it is characterised in that：The wetting agent A-1 is one kind in methanol A, ethyl alcohol A, propyl alcohol A, n-butanol A, amylalcohol A, and the wetting agent A-2 is ethylene glycol A or propylene glycol A In one kind.

5. silicon titanium aeroge absorption according to claim 2 and photocatalysis interior wall coating, it is characterised in that：The benzene second Solid content >=60% of alkene-acrylic emulsion A, elastic emulsion A, organosilicon-modified acrylic emulsion A, viscosity >=1000cps.

6. silicon titanium aeroge absorption according to claim 2 and photocatalysis interior wall coating, it is characterised in that：The levelling agent A is polyether silicone levelling agent, and the antifoaming agent A active ingredients are hydrophobic silica, and the coalescents A is front three The one or more of base pentanediol A, mono isobutyrate A, alcohol ester 12A, the dispersant A are anionic dispersing agent, the increasing Thick dose of A is the one or two of hydroxyethyl cellulose A, hydroxymethyl cellulose A.

7. silicon titanium aeroge absorption according to claim 1 and photocatalysis interior wall coating, it is characterised in that:The water A, water B is deionized water.

8. silicon titanium aeroge absorption according to claim 1 and photocatalysis interior wall coating, it is characterised in that：The nano oxygen Change titanium comprehensive silicon aerogels raw powder's production technology, includes the following steps：

（Ⅰ）Aerogel particles C is sieved through 300 mesh, is soaked in 30~36h in 20 ° of ammonium hydroxide C, obtains material A；By rare earth nitrades C With 1：1 weight ratio is dissolved in deionized water C, and material B is obtained after filtering；

（Ⅱ）The weight ratio meter of titanium oxide C is converted into as 5% with titanium sulfate C, is 95% by required titanium sulfate C and weight ratio meter Deionized water C carry out being mixed and made into solution；Solution is carried out continuing to stir and be heated to 75~90 DEG C, keeps constant temperature, The material A that step (I) is produced at the uniform velocity is added in 60~90min, speed of agitator control is opened super while 500~800r/min Acoustic vibration, the amount that material A is added is by the weight of silica aerogel C, and the weight of silica aerogel C is converted into titanium sulfate C 0.36~0.5 times of the weight of titanium oxide C；

（Ⅲ）Continuously add appropriate ammonium hydroxide C by pH value be adjusted to 8.0~9.5, then with the mixing speed of 30~80r/min after Continuous stirring, stirring while, open ultrasonic vibration；60~90min is reacted, slurry C is obtained；

（Ⅳ）Slurry C is filtered, washed, the pH value for controlling slurry C is 7~8, while consolidating for the slurry C after being filtered, washed being made to contain Measure ＞ 40%；Then, its 2 times of deionized water C is added, while being added and expecting that (rare earth nitrades C is easy the moisture absorption to B, can cause to measure Inaccuracy, so for the addition of accurate quantitative analysis rare earth nitrades C, by rare earth nitrades C in terms of rare earth oxide), In, weight of the material B middle rare earth nitrate C in terms of oxide is the 3~7% of titanium oxide C weight, and speed of agitator is controlled 500 ~800r/min, when stirring is warming up to 75~90 DEG C, it is 7~7.5 that ammonium hydroxide C tune pH value, which is added dropwise, and hydrogen peroxide C, hydrogen peroxide C is added Addition be expect weight of the B middle rare earth nitrate C in terms of oxide 10%, be stirred to react 30min；After washing, filtering When to material solid content ＞ 40%, collects and obtain slurry D；

（Ⅴ）Slurry D is spray-dried, tubular type oscillation sintering furnace, the heating temperature in tubular type oscillation sintering furnace are entered after dry Degree is 450~600 DEG C, so that the titanium hydroxide C and rare-earth hydroxide C that are coated on silica aerogel C Surface is converted into nanoscale sharp Titanium-type titanium oxide C and rare earth oxide C solid solution, finally obtain nano-titanium oxide and silicon compound rare earth oxide solid solution C Aerogels are nano-titanium oxide comprehensive silicon aerogels powder.

9. silicon titanium aeroge absorption according to claim 1 and photocatalysis interior wall coating, it is characterised in that：Step（F）In The coupling agent B is hexamethyldisilazane B, bis- (trimethylsilyl) acetamide B, methoxytrimethylsilane B, dimethoxy Dimethylsilane B, phenyl triethoxysilane B, phenyltrimethoxysila,e B, vinyltrimethoxysilane B, three second of methyl The one or more of oxysilane B and methyl trimethoxy oxygroup alkane B.