CN1511889A - Surface modified nano zinc oxide water dispersion and its preparing method and use - Google Patents
Surface modified nano zinc oxide water dispersion and its preparing method and use Download PDFInfo
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Abstract
The present invention belongs to the field of inorganic material, and is especially surface modified nano zinc oxide water dispersion and its preparation process and use. The water dispersion consists of: nano zinc oxide 0.1-10 wt%; hydrated SiO2 0.06-10 wt%, hydrated Al2O3 0.12-20 wt% or hydrated Fe2O3 0.05-10 wt%; silane coupling agent 0.1-10 wt%; and water soluble polymer 0.2-9 wt% other than water. The water dispersion is prepared through depositing hydrated SiO2, hydrated Al2O3 or hydrated Fe2O3 onto the surface of zinc oxide, and subsequent homogeneous mixing with silane coupling agent, water soluble polymer and water. The zinc oxide inside the water dispersion is dispersed homogeneously and stably without aggregation, and the water dispersion of the present invention may be used in preparing uvioresistant fabric.
Description
Technical field
The invention belongs to field of inorganic materials, particularly nano zine oxide water dispersion of surface modification and its production and use.
Background technology
Nano zine oxide is a kind of multifunctional material, has obtained widely in piezoelectric ceramics, pigment, petrochemical catalyst, sensitive material or field of fine chemical and has used.The application foundation of this type of material is the physical property of their uniquenesses, as the spectral response curve of material, can be with characteristic etc.And when the size of material reached nanometer scale, owing to have important structural performances such as quantum confined effect, dimensional effect, surface effects, its physical property and common material were far different.
The purposes of nano zine oxide is extensive day by day:
Application in makeup---as novel sunscreen agent and antiseptic-germicide.It is strong that nano zine oxide absorbs ultraviolet ability, plays sun-proof effect.And, especially under uviolizing, in water and air (oxygen), can resolve into the electronegative electronics that moves freely voluntarily at sunlight, stay the hole of positively charged simultaneously.There is extremely strong chemically reactive in this hole, can with multiple organism generation oxidizing reaction (comprising organism such as bacterium), kill pathogens and virus play the antimicrobial effect.Application in textile industry, mainly be utilize that nano zine oxide is antibiotic, deodorization, anti-ultraviolet performance.
Nano zine oxide is a raw material of making the high-speed abrasion-proof rubber item.
Nano zine oxide is because size is little, specific surface area is big, and the key attitude on surface is different with granule interior, and the surface atom coordination is not congruent, causes the activity site on surface to increase, and has formed rough atomic steps, has strengthened the reaction contact surface.Thereby it can do catalyzer and photocatalyst.
Nano zine oxide not only has good receptivity to hertzian wave, can also absorb visible light and infrared rays, do stealth material, not only can in very wide frequency band range, escape the scouting of radar with it, and can play the infrared stealth effect, important meaning is arranged on national defence.
Nano zine oxide has now become one of research focus of absorbing material because of having light weight, of light color, advantage such as wave-sucking performance is strong.
Yet, because the minimizing of nano zinc oxide particles size, the surface atom number of particle increases significantly with the ratio of total atom number, the surface energy of particle and surface tension are also along with increase, residing crystal field environment of its surface atom and bound energy and inner atom are different, there are many dangling bondss, and has unsaturated character, thereby very easily combine and tend towards stability with other atoms, so, nano zinc oxide particles has very high chemically reactive, causes it very easily to reunite in producing and using, especially in liquid phase.So expect finely dispersed system, just need handle to the surface of nano zine oxide.
Summary of the invention
One of purpose of the present invention be uniformly dispersed in order to overcome the defective that nano zine oxide is very easily reunited in water dispersion, to provide a kind of, the nano zine oxide water dispersion of stable surface modification.
A further object of the present invention provides the preparation method of the nano zine oxide water dispersion of this surface modification.
An also purpose of the present invention provides the purposes of the nano zine oxide water dispersion of this surface modification.
The nano zine oxide water dispersion of surface modification of the present invention is hydration SiO
2, hydration Al
2O
3Or hydration Fe
2O
3Deposit to the surface of nano zine oxide, form heterogeneous coating layer; Hydrophilic radical by silane coupling agent with heterogeneous coating layer and/or the nano oxidized zinc surface on coating act on mutually, the hydrophobic grouping of silane coupling agent and the hydrophobic grouping of water-soluble polymers combine simultaneously, thereby nano zine oxide evenly, stably is dispersed in the water dispersion, has prevented the reunion between the nano granular of zinc oxide effectively.
The nano zine oxide water dispersion of surface modification provided by the invention, in system weight per-cent, this dispersion comprises: 0.1～10% nano zine oxide; 0.06～10% hydration SiO
2, 0.12～20% hydration Al
2O
3Or the Fe of 0.05～10% hydration
2O
30.1～10% silane coupling agent; 0.2～9% water-soluble polymers; All the other are water.
Wherein said silane coupling agent is a vinyltriethoxysilane, vinyltrimethoxy silane, vinyl trichloro silane, vinyl three ('beta '-methoxy oxyethyl group) silane, vinyl three tert.-butoxy silane, vinyl silane tri-butyl peroxy, vinyltriacetoxy silane, γ-An Bingjisanyiyangjiguiwan, the phenylamino Union carbide A-162, N-(β-aminoethyl)-γ-An Bingjisanyiyangjiguiwan, N-(β-aminoethyl)-γ-aminopropyl methyl dimethoxysilane, γ-(2, the 3-epoxypropyl) propyl trimethoxy silicane, γ-(methacryloxypropyl) propyl trimethoxy silicane, γ-mercaptopropyl trimethoxysilane, methyltrimethoxy silane, methyl three (acryloyl oxyethyl group) silane, methyl three (methacryloyl oxyethyl group) silane, methyl three (epoxy ethyl methoxyl group) silane, phenyl triethoxysilane or they are mixture arbitrarily.
Described water-soluble polymers is a polyacrylic ester, for example polymethyl acrylate, polyethyl acrylate, polyacrylic acid propyl ester, butyl polyacrylate or polyisobutyl acrylate; Polymethacrylate, for example polymethylmethacrylate, polyethyl methacrylate, polypropylmethacryla,es, poly-n-butyl methacrylate or polyisobutyl methacrylate; Poly-ethyl propylene acid esters, for example poly-ethylacrylic acid methyl esters, poly-ethyl propylene acetoacetic ester, poly-ethyl propylene propyl propionate, poly-ethyl propylene acid butyl ester or poly-ethylacrylic acid isobutyl ester; Polyvinyl acetate (PVA), for example Vinyl Acetate Copolymer methyl esters, Vinyl Acetate Copolymer ethyl ester, Vinyl Acetate Copolymer propyl ester, Vinyl Acetate Copolymer butyl ester or Vinyl Acetate Copolymer isobutyl ester; Urethane; Polyvinyl alcohol; The polycarboxylate compound; Or mixture arbitrarily between these water-soluble polymerss.
The nano zine oxide water dispersion of surface modification provided by the invention also further comprises alcohol, in system weight per-cent, and the content 1～10% of alcohol; Described alcohol is methyl alcohol, ethanol, propyl alcohol, Virahol, butanols, isopropylcarbinol or they mixture arbitrarily.
The nano zine oxide water dispersion of surface modification provided by the invention, by following method preparation, step is as follows:
(1), hydration SiO
2The preparation of surface-modified nano zinc oxide:
Sodium rice zinc oxide, water-soluble silicate are joined in the container by mass ratio 1: 0.8～1.2, and adding is the water of 5～50 times of sodium rice zinc oxide quality again, under agitation, with acid the pH value of this mixture is transferred between 6～8, is stirred to evenly; Then carry out centrifugation, leave standstill, remove supernatant liquor, obtain hydration SiO
2The nano zine oxide of surface modification; Wherein said water-soluble silicate is water glass, potassium silicate or it is arbitrarily than mixture; Described acid is hydrochloric acid, sulfuric acid or acetate etc.;
Or hydration Al
2O
3The preparation of surface-modified nano zinc oxide:
Sodium rice zinc oxide, water-soluble aluminum salt are joined in the container by mass ratio 1: 2～6, and adding is the water of 5～50 times of sodium rice zinc oxide quality again, under agitation, with acid or alkali the pH value of this mixture is transferred between 4～7, is stirred to evenly; Then carry out centrifugation, leave standstill, remove supernatant liquor, obtain hydration Al
2O
3The nano zine oxide of surface modification; Wherein said water-soluble aluminum salt is aluminum chloride, aluminum nitrate, potassium aluminium sulfate or they mixture arbitrarily; Described acid is hydrochloric acid, sulfuric acid or acetate etc.; Described alkali is sodium hydroxide, potassium hydroxide or ammoniacal liquor etc.;
Or hydration Fe
2O
3The preparation of surface-modified nano zinc oxide:
Sodium rice zinc oxide, water-soluble molysite are joined in the container by mass ratio 1: 0.5～1, and adding is the water of 5～50 times of sodium rice zinc oxide quality again, under agitation, with alkali the pH value of this mixture is transferred between 11～13, is stirred to evenly; Then carry out centrifugation, leave standstill, remove supernatant liquor, obtain hydration Fe
2O
3The nano zine oxide of surface modification; Wherein said water-soluble molysite is iron(ic) chloride, iron nitrate or they mixture arbitrarily; Described alkali is sodium hydroxide, potassium hydroxide or ammoniacal liquor etc.;
(2), the preparation of the nano zine oxide water dispersion of surface modification:
Hydration SiO with step (1) preparation
2Water-soluble polymers emulsion and the water of the nano zine oxide of surface modification, silane coupling agent, 10～30wt% join in the container, and make hydration SiO
2The content of the nano zine oxide of surface modification in system is 0.16～20% of system gross weight, the content of silane coupling agent in system is 0.1～10% of system gross weight, the content of water-soluble polymers in system is 0.2～9% of system gross weight, mix to evenly, obtain hydration SiO
2The nano zine oxide water dispersion of surface modification;
Or with the hydration Al of step (1) preparation
2O
3Water-soluble polymers emulsion and the water of the nano zine oxide of surface modification, silane coupling agent, 10～30wt% join in the container, and make hydration Al
2O
3The content of the nano zine oxide of surface modification in system is 0.22～30% of system gross weight, the content of silane coupling agent in system is 0.1～10% of system gross weight, the content of water-soluble polymers in system is 0.2～9% of system gross weight, mix to evenly, obtain hydration Al
2O
3The nano zine oxide water dispersion of surface modification;
Or with the hydration Fe of step (1) preparation
2O
3Water-soluble polymers emulsion and the water of the nano zine oxide of surface modification, silane coupling agent, 10～30wt% join in the container, and make hydration Fe
2O
3The content of the nano zine oxide of surface modification in system is 0.15～20% of system gross weight, the content of silane coupling agent in system is 0.1～10% of system gross weight, the content of water-soluble polymers in system is 0.2～9% of system gross weight, mix to evenly, obtain hydration Fe
2O
3The nano zine oxide water dispersion of surface modification;
Wherein said water-soluble polymers emulsion is to be used for the present invention's water-soluble polymers and the emulsion that water forms.
Preparation method of the present invention also further comprises, in described step (2), also can add alcohol in container, and making the content of alcohol in system is system gross weight 1～10%, and is stirred to evenly.
In preparation method provided by the invention, reaction system is stirred, preferably adopt the mode of ultrasonic concussion.
In preparation method's step of the present invention (1), the preferred pH buffer reagent pH value of the hierarchy of control better that adopts, the pH value of system is not fluctuateed in reaction process, and described pH buffer reagent is sodium phosphate, SODIUM PHOSPHATE, MONOBASIC, Sodium phosphate dibasic or they mixture arbitrarily.
The nano zine oxide water dispersion of surface modification provided by the invention can be used for textile coating, obtain uvioresistant textiles, described textiles comprises cotton, fiber crops, wool, silk, artificial cotton, terylene, polypropylene fibre, acrylic fibers, polyamide fibre, washs/cotton, hair/wash or hair/nitrile fabric; Or be used to prepare the fiber of tool uvioresistant function; Or be used to prepare uvioresistant glass; Or be used to prepare the uvioresistant plastics; Or be used for makeup as sun-screening agent and antiseptic-germicide; Or be used for coating, improve the ageing resistance of coating, described coating comprises that urethane, moisture cure urethanes, oily resin modified phenol resin, Toenol 1140, Synolac, outdoor latex, silicone resin (masonry dewater usefulness), silicon are resin, inorganic zinc-rich system, acrylic resin, thermosetting acrylic resin, vinyl acetate resin, Resins, epoxy, aminoresin; Or, work to increase rubber wear-resisting intensity as the supplementary additive of loading material of rubber lime carbonate.
The nano zine oxide water dispersion of surface modification of the present invention, nano zine oxide evenly, stably is dispersed in the water dispersion, has prevented the reunion between the nano granular of zinc oxide effectively, and water dispersion of the present invention can be stablized 7～30 days; The preparation method of the nano zine oxide water dispersion of surface modification provided by the invention, easy handling, favorable reproducibility.
Embodiment
The invention will be further described below in conjunction with embodiment.
Embodiment 1:
1. get 1g sodium rice zinc oxide, 0.2g sodium phosphate and 6ml water and put into the 50ml beaker, be warmed up to 60 ℃, ultrasonic concussion 2 hours fully disperses nano zine oxide.Add 1g water glass and 10ml water then.With hydrochloric acid (1%) adjust pH, between 7～8, adding water to cumulative volume then is 25ml, sonic oscillation 1 hour, centrifugation is after 1 hour, remove supernatant liquor after, obtain hydration SiO
2The nano zine oxide of surface modification.
2. the hydration SiO that obtains to above-mentioned steps 1
2Adding water to cumulative volume in the nano zine oxide of surface modification is 25ml, add γ-An Bingjisanyiyangjiguiwan 0.5ml and dehydrated alcohol 1ml, ultrasonic concussion further added 17wt% polymethyl acrylate emulsion 6ml after 50 minutes, ultrasonic concussion obtained hydration SiO after 30 minutes
2The nano zine oxide water dispersion of surface modification.
The nano zine oxide water dispersion that present embodiment makes is faint yellow, does not all have precipitation after leaving standstill 30 minutes, 60 minutes, 3 hours or 6 hours, and the high precipitation of 2mm is arranged after leaving standstill one day, and after this continuing to leave standstill 30 days precipitation capacities does not have considerable change.
Embodiment 2:
1. get 1g sodium rice zinc oxide, 0.2g sodium phosphate and 6ml water and put into the 50ml beaker, be warmed up to 60 ℃, ultrasonic concussion 2 hours fully disperses nano zine oxide.Add 5g potassium aluminium sulfate and 10ml water then.With hydrochloric acid (1%) adjust pH, between 5.5～6.0, adding water to cumulative volume then is 25ml, sonic oscillation 1 hour, centrifugation is after 1 hour, remove supernatant liquor after, obtain hydration Al
2O
3The nano zine oxide of surface modification.
2. the hydration Al that obtains to above-mentioned steps 1
2O
3Adding water to cumulative volume in the nano zine oxide of surface modification is 25ml, γ-An Bingjisanyiyangjiguiwan 0.5ml and dehydrated alcohol 1ml, and ultrasonic concussion added 17wt% polymethyl acrylate emulsion 6ml after 50 minutes, and ultrasonic concussion obtained hydration Al after 30 minutes
2O
3The nano zine oxide water dispersion of surface modification.
The nano zine oxide water dispersion that present embodiment makes is creamy white, after leaving standstill 30 minutes, 60 minutes, 3 hours or 6 hours, all there is not precipitation, the high precipitation of 13mm is arranged after leaving standstill one day, and this precipitation is loosely organized, and after this continuing to leave standstill 30 days precipitation capacities does not have considerable change.
Embodiment 3:
1. get 1g sodium rice zinc oxide, 0.2g sodium phosphate and 6ml water and put into the 50ml beaker, be warmed up to 60 ℃, ultrasonic concussion 2 hours fully disperses nano zine oxide, adds 0.8g iron trichloride and 10ml water then.With ammoniacal liquor (1%) adjust pH, between 12～13 (color of dispersion liquid gradually becomes pale brown look), adding water to cumulative volume then is 25ml, sonic oscillation 1 hour.After the centrifugation 1 hour, remove supernatant liquor after, obtain hydration Fe
2O
3The nano zine oxide of surface modification.
2. the hydration Fe that obtains to above-mentioned steps 1
2O
3Adding water to cumulative volume in the nano zine oxide of surface modification is 25ml, add silane coupling agent γ-An Bingjisanyiyangjiguiwan 0.5ml and dehydrated alcohol 1ml, ultrasonic concussion added 17wt% polymethyl acrylate emulsion 6ml after 50 minutes, ultrasonic concussion obtained hydration Fe after 30 minutes
2O
3The nano zine oxide water dispersion of surface modification.
The nano zine oxide water dispersion that present embodiment makes is khaki color, does not all have precipitation after leaving standstill 30 minutes, 60 minutes, 3 hours or 6 hours, and the high precipitation of 2.5mm is arranged after leaving standstill one day, and after this continuing to leave standstill 30 days precipitation capacities does not have considerable change.
Owing to use hydration Fe
2O
3The color of surface-modified nano Zinc oxide water dispersion, along with the difference of the consumption of iron trichloride in the preparation and change, color changes to reddish-brown from light yellow.So use hydration Fe
2O
3During surface-modified nano zinc oxide, the consumption of iron trichloride should be decided according to practical situation.
Embodiment 4:
Comparative experiments:
Comparative experiments one: in the 100ml beaker, the γ-An Bingjisanyiyangjiguiwan, 17wt% polymethyl acrylate emulsion 6ml and the 25ml water that add 1g nano zine oxide, 0.5ml, ultrasonic concussion obtained the water dispersion of nano zine oxide after 30 minutes, and this water dispersion is left standstill placement.
Reuniting and following precipitation appears after leaving standstill 5 minutes in the water dispersion of the nano zine oxide that comparative experiments one makes, and 20 minutes postprecipitations are 7.5mm, and supernatant liquor is transparent after one day, precipitates fully, and precipitation highly is 8mm.
Comparative experiments two: in the 100ml beaker, add 1g nano zine oxide and 25ml water, ultrasonic concussion obtained the water dispersion of nano zine oxide after 30 minutes, and this water dispersion is left standstill placement.
The water dispersion of the nano zine oxide that comparative experiments two makes precipitation occurs after leaving standstill 5 minutes, demixing phenomenon occurs after one day, and supernatant liquor is transparent, and the precipitation part highly is 7mm below.
Illustrate clearly that from the foregoing description precipitation appears in the nano zine oxide water dispersion of surface modification of the present invention after placing one day, after this continue to place the no considerable change of precipitation, demixing phenomenon do not occur; And precipitation, layering after a day promptly appear in the nano zine oxide water dispersion of comparative experiments after placing 5 minutes.Therefore, the nano zine oxide water dispersion of surface modification of the present invention, nano zine oxide evenly, stably is dispersed in the water dispersion, has prevented the reunion between the nano granular of zinc oxide effectively.
Claims (10)
1. the nano zine oxide water dispersion of a surface modification is characterized in that, in system weight per-cent, this water dispersion comprises: 0.1～10% nano zine oxide; 0.06～10% hydration SiO
2, 0.12～20% hydration Al
2O
3Or 0.05～10% hydration Fe
2O
30.1～10% silane coupling agent; 0.2～9% water-soluble polymers; All the other are water.
2. water dispersion as claimed in claim 1, it is characterized in that, described silane coupling agent is a vinyltriethoxysilane, vinyltrimethoxy silane, vinyl trichloro silane, vinyl three ('beta '-methoxy oxyethyl group) silane, vinyl three tert.-butoxy silane, vinyl silane tri-butyl peroxy, vinyltriacetoxy silane, γ-An Bingjisanyiyangjiguiwan, the phenylamino Union carbide A-162, N-(β-aminoethyl)-γ-An Bingjisanyiyangjiguiwan, N-(β-aminoethyl)-γ-aminopropyl methyl dimethoxysilane, γ-(2, the 3-epoxypropyl) propyl trimethoxy silicane, γ-(methacryloxypropyl) propyl trimethoxy silicane, γ-mercaptopropyl trimethoxysilane, methyltrimethoxy silane, methyl three (acryloyl oxyethyl group) silane, methyl three (methacryloyl oxyethyl group) silane, methyl three (epoxy ethyl methoxyl group) silane, phenyl triethoxysilane or their any mixture.
3. water dispersion as claimed in claim 1, it is characterized in that described water-soluble polymers is a mixture arbitrarily between polyacrylic ester, polymethacrylate, poly-ethyl propylene acid esters, polyvinyl acetate (PVA), urethane, polyvinyl alcohol, polycarboxylate compound or these water-soluble polymerss.
4. water dispersion as claimed in claim 3 is characterized in that, described polyacrylic ester is polymethyl acrylate, polyethyl acrylate, polyacrylic acid propyl ester, butyl polyacrylate or polyisobutyl acrylate; Described polymethacrylate is polymethylmethacrylate, polyethyl methacrylate, polypropylmethacryla,es, poly-n-butyl methacrylate or polyisobutyl methacrylate; Described poly-ethyl propylene acid esters is poly-ethylacrylic acid methyl esters, poly-ethyl propylene acetoacetic ester, poly-ethyl propylene propyl propionate, poly-ethyl propylene acid butyl ester or poly-ethylacrylic acid isobutyl ester; Described polyvinyl acetate (PVA) is Vinyl Acetate Copolymer methyl esters, Vinyl Acetate Copolymer ethyl ester, Vinyl Acetate Copolymer propyl ester, Vinyl Acetate Copolymer butyl ester or Vinyl Acetate Copolymer isobutyl ester.
5. water dispersion as claimed in claim 1 is characterized in that described water dispersion also comprises 1～10% alcohol, in system weight per-cent.
6. water dispersion as claimed in claim 5 is characterized in that, described alcohol is methyl alcohol, ethanol, propyl alcohol, Virahol, butanols, isopropylcarbinol or its mixture arbitrarily.
7. preparation method as water dispersion as described in any one of the claim 1～6 is characterized in that described preparation method's step is as follows:
(1), hydration SiO
2The preparation of surface-modified nano zinc oxide:
Sodium rice zinc oxide, water-soluble silicate are joined in the container by mass ratio 1: 0.8～1.2, and adding is the water of 5～50 times of sodium rice zinc oxide quality again, under agitation, with acid the pH value of this mixture is transferred between 6～8, is stirred to evenly; Then carry out centrifugation, leave standstill, remove supernatant liquor, obtain hydration SiO
2The nano zine oxide of surface modification; Wherein said water-soluble silicate is water glass, potassium silicate or they mixture arbitrarily; Described acid is hydrochloric acid, sulfuric acid or acetate;
Or hydration Al
2O
3The preparation of surface-modified nano zinc oxide:
Sodium rice zinc oxide, water-soluble aluminum salt are joined in the container by mass ratio 1: 2～6, and adding is the water of 5～50 times of sodium rice zinc oxide quality again, under agitation, with acid or alkali the pH value of this mixture is transferred between 4～7, is stirred to evenly; Then carry out centrifugation, leave standstill, remove supernatant liquor, obtain hydration Al
2O
3The nano zine oxide of surface modification; Wherein said water-soluble aluminum salt is aluminum chloride, aluminum nitrate, potassium aluminium sulfate or they mixture arbitrarily; Described acid is hydrochloric acid, sulfuric acid or acetate; Described alkali is sodium hydroxide, potassium hydroxide or ammoniacal liquor;
Or hydration Fe
2O
3The preparation of surface-modified nano zinc oxide:
Sodium rice zinc oxide, water-soluble molysite are joined in the container by mass ratio 1: 0.5～1, and adding is the water of 5～50 times of sodium rice zinc oxide quality again, under agitation, with alkali the pH value of this mixture is transferred between 11～13, is stirred to evenly; Then carry out centrifugation, leave standstill, remove supernatant liquor, obtain hydration Fe
2O
3The nano zine oxide of surface modification; Wherein said water-soluble molysite is iron(ic) chloride, iron nitrate or they mixture arbitrarily; Described alkali is sodium hydroxide, potassium hydroxide or ammoniacal liquor;
(2), the preparation of the nano zine oxide water dispersion of surface modification:
Hydration SiO with step (1) preparation
2Water-soluble polymers emulsion and the water of the nano zine oxide of surface modification, silane coupling agent, 10～30wt% join in the container, and make hydration SiO
2The content of the nano zine oxide of surface modification in system is 0.16～20% of system gross weight, the content of silane coupling agent in system is 0.1～10% of system gross weight, the content of water-soluble polymers in system is 0.2～9% of system gross weight, mix to evenly, obtain hydration SiO
2The nano zine oxide water dispersion of surface modification;
Or with the hydration Al of step (1) preparation
2O
3Water-soluble polymers emulsion and the water of the nano zine oxide of surface modification, silane coupling agent, 10～30wt% join in the container, and make hydration Al
2O
3The content of the nano zine oxide of surface modification in system is 0.22～30% of system gross weight, the content of silane coupling agent in system is 0.1～10% of system gross weight, the content of water-soluble polymers in system is 0.2～9% of system gross weight, mix to evenly, obtain hydration Al
2O
3The nano zine oxide water dispersion of surface modification;
Or with the hydration Fe of step (1) preparation
2O
3Water-soluble polymers emulsion and the water of the nano zine oxide of surface modification, silane coupling agent, 10～30wt% join in the container, and make hydration Fe
2O
3The content of the nano zine oxide of surface modification in system is 0.15～20% of system gross weight, the content of silane coupling agent in system is 0.1～10% of system gross weight, the content of water-soluble polymers in system is 0.2～9% of system gross weight, mix to evenly, obtain hydration Fe
2O
3The nano zine oxide water dispersion of surface modification;
Wherein said water-soluble polymers emulsion is the emulsion that water-soluble polymers and water form.
8. the preparation method of the nano zine oxide water dispersion of surface modification as claimed in claim 7 is characterized in that, in described step (2) process, also adds alcohol in container, and making the content of alcohol in system is system gross weight 1～10%, and is stirred to evenly.
9. as the preparation method of the nano zine oxide water dispersion of claim 7 or 8 described surface modifications, it is characterized in that described stirring is ultrasonic concussion.
10. the application as the nano zine oxide water dispersion of any described surface modification of claim 1～6 is characterized in that described water dispersion is used for textile coating, obtains uvioresistant textiles; Or be used to prepare the fiber of tool uvioresistant function; Or be used to prepare uvioresistant glass; Or be used to prepare the uvioresistant plastics; Or be used for makeup as sun-screening agent and antiseptic-germicide; Or add in the coating; Or as the supplementary additive of loading material of rubber lime carbonate.
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