CN117510996A - Preparation method and application of modified cellulose - Google Patents
Preparation method and application of modified cellulose Download PDFInfo
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- CN117510996A CN117510996A CN202311796119.XA CN202311796119A CN117510996A CN 117510996 A CN117510996 A CN 117510996A CN 202311796119 A CN202311796119 A CN 202311796119A CN 117510996 A CN117510996 A CN 117510996A
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- 229920002678 cellulose Polymers 0.000 title claims abstract description 147
- 239000001913 cellulose Substances 0.000 title claims abstract description 144
- 238000002360 preparation method Methods 0.000 title claims abstract description 34
- 230000000844 anti-bacterial effect Effects 0.000 claims abstract description 40
- SOQBVABWOPYFQZ-UHFFFAOYSA-N oxygen(2-);titanium(4+) Chemical compound [O-2].[O-2].[Ti+4] SOQBVABWOPYFQZ-UHFFFAOYSA-N 0.000 claims abstract description 34
- 239000010902 straw Substances 0.000 claims abstract description 22
- 235000021355 Stearic acid Nutrition 0.000 claims abstract description 21
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims abstract description 21
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims abstract description 21
- 241000609240 Ambelania acida Species 0.000 claims abstract description 12
- 239000010905 bagasse Substances 0.000 claims abstract description 12
- 230000004048 modification Effects 0.000 claims abstract description 12
- 238000012986 modification Methods 0.000 claims abstract description 12
- 229920005989 resin Polymers 0.000 claims abstract description 12
- 239000011347 resin Substances 0.000 claims abstract description 12
- 239000003242 anti bacterial agent Substances 0.000 claims abstract description 10
- 239000006087 Silane Coupling Agent Substances 0.000 claims abstract description 7
- 239000002994 raw material Substances 0.000 claims abstract description 7
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 52
- 238000002156 mixing Methods 0.000 claims description 42
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 claims description 40
- 238000003756 stirring Methods 0.000 claims description 37
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 35
- 238000001035 drying Methods 0.000 claims description 35
- 239000004408 titanium dioxide Substances 0.000 claims description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 23
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 21
- 238000000034 method Methods 0.000 claims description 20
- 238000001132 ultrasonic dispersion Methods 0.000 claims description 20
- 238000005406 washing Methods 0.000 claims description 20
- 238000006243 chemical reaction Methods 0.000 claims description 18
- 239000008367 deionised water Substances 0.000 claims description 15
- 229910021641 deionized water Inorganic materials 0.000 claims description 15
- 239000000706 filtrate Substances 0.000 claims description 15
- 238000001914 filtration Methods 0.000 claims description 15
- 239000002244 precipitate Substances 0.000 claims description 15
- 238000007873 sieving Methods 0.000 claims description 15
- 238000009210 therapy by ultrasound Methods 0.000 claims description 14
- 239000000203 mixture Substances 0.000 claims description 13
- 230000007935 neutral effect Effects 0.000 claims description 10
- 238000002390 rotary evaporation Methods 0.000 claims description 10
- 238000002791 soaking Methods 0.000 claims description 10
- 239000000725 suspension Substances 0.000 claims description 10
- HQFCOGRKGVGYBB-UHFFFAOYSA-N ethanol;nitric acid Chemical compound CCO.O[N+]([O-])=O HQFCOGRKGVGYBB-UHFFFAOYSA-N 0.000 claims description 9
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 7
- WXENFNJZXUNZIN-UHFFFAOYSA-M decyl-dimethyl-tetradecylazanium bromide Chemical compound [Br-].C(CCCCCCCCC)[N+](C)(C)CCCCCCCCCCCCCC WXENFNJZXUNZIN-UHFFFAOYSA-M 0.000 claims description 6
- 238000007731 hot pressing Methods 0.000 claims description 6
- WYTZZXDRDKSJID-UHFFFAOYSA-N (3-aminopropyl)triethoxysilane Chemical compound CCO[Si](OCC)(OCC)CCCN WYTZZXDRDKSJID-UHFFFAOYSA-N 0.000 claims description 5
- RUPBZQFQVRMKDG-UHFFFAOYSA-M Didecyldimethylammonium chloride Chemical compound [Cl-].CCCCCCCCCC[N+](C)(C)CCCCCCCCCC RUPBZQFQVRMKDG-UHFFFAOYSA-M 0.000 claims description 5
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 5
- JBIROUFYLSSYDX-UHFFFAOYSA-M benzododecinium chloride Chemical compound [Cl-].CCCCCCCCCCCC[N+](C)(C)CC1=CC=CC=C1 JBIROUFYLSSYDX-UHFFFAOYSA-M 0.000 claims description 5
- 238000004061 bleaching Methods 0.000 claims description 5
- 238000005119 centrifugation Methods 0.000 claims description 5
- WOWHHFRSBJGXCM-UHFFFAOYSA-M cetyltrimethylammonium chloride Chemical compound [Cl-].CCCCCCCCCCCCCCCC[N+](C)(C)C WOWHHFRSBJGXCM-UHFFFAOYSA-M 0.000 claims description 5
- 229960004670 didecyldimethylammonium chloride Drugs 0.000 claims description 5
- 235000019441 ethanol Nutrition 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 5
- 229910017604 nitric acid Inorganic materials 0.000 claims description 5
- 238000005303 weighing Methods 0.000 claims description 5
- 238000009835 boiling Methods 0.000 claims description 4
- AXYXAGRFJFVAFQ-UHFFFAOYSA-M decyl-dodecyl-dimethylazanium;bromide Chemical compound [Br-].CCCCCCCCCCCC[N+](C)(C)CCCCCCCCCC AXYXAGRFJFVAFQ-UHFFFAOYSA-M 0.000 claims description 4
- 230000002787 reinforcement Effects 0.000 claims 1
- 230000002209 hydrophobic effect Effects 0.000 abstract description 12
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 abstract description 4
- 239000001569 carbon dioxide Substances 0.000 abstract description 2
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 abstract description 2
- 238000006297 dehydration reaction Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 abstract description 2
- 125000001165 hydrophobic group Chemical group 0.000 abstract description 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 229910021392 nanocarbon Inorganic materials 0.000 abstract description 2
- 239000002861 polymer material Substances 0.000 abstract description 2
- 239000011148 porous material Substances 0.000 abstract description 2
- 150000003242 quaternary ammonium salts Chemical class 0.000 abstract description 2
- 238000004064 recycling Methods 0.000 abstract description 2
- 239000002699 waste material Substances 0.000 abstract description 2
- 235000010980 cellulose Nutrition 0.000 description 110
- 230000000052 comparative effect Effects 0.000 description 14
- 239000011248 coating agent Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 241000196324 Embryophyta Species 0.000 description 3
- 230000009471 action Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- PBLNBZIONSLZBU-UHFFFAOYSA-N 1-bromododecane Chemical compound CCCCCCCCCCCCBr PBLNBZIONSLZBU-UHFFFAOYSA-N 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 150000004676 glycans Chemical class 0.000 description 2
- 230000035800 maturation Effects 0.000 description 2
- 239000000178 monomer Substances 0.000 description 2
- 229920001277 pectin Polymers 0.000 description 2
- 229920001282 polysaccharide Polymers 0.000 description 2
- 239000005017 polysaccharide Substances 0.000 description 2
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 description 1
- 229920002488 Hemicellulose Polymers 0.000 description 1
- 230000002730 additional effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000002421 cell wall Anatomy 0.000 description 1
- 235000013325 dietary fiber Nutrition 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000003623 enhancer Substances 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 239000008103 glucose Substances 0.000 description 1
- 229920005610 lignin Polymers 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 239000001814 pectin Substances 0.000 description 1
- 235000010987 pectin Nutrition 0.000 description 1
- 239000002952 polymeric resin Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K9/00—Use of pretreated ingredients
- C08K9/12—Adsorbed ingredients, e.g. ingredients on carriers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K9/00—Use of pretreated ingredients
- C08K9/04—Ingredients treated with organic substances
- C08K9/06—Ingredients treated with organic substances with silicon-containing compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Polysaccharides And Polysaccharide Derivatives (AREA)
- Apparatus For Disinfection Or Sterilisation (AREA)
Abstract
The invention relates to the technical field of high polymer materials, in particular to a preparation method and application of modified cellulose, wherein crop straws and bagasse are used as raw materials to prepare the cellulose, so that the effect of recycling waste can be achieved, and the production cost of the cellulose can be reduced; the cellulose is subjected to hydrophobic modification by the octadecanoic acid, and the carboxyl on the surface of the octadecanoic acid and the hydroxyl on the surface of the cellulose can be subjected to dehydration reaction in the modification, so that a hydrophobic group is introduced to the surface of the cellulose, and the cellulose has stable hydrophobic performance; according to the invention, different types of quaternary ammonium salt antibacterial agents are adsorbed in the pore diameter structure of the surface of the nano titanium dioxide, and then the nano carbon dioxide can have stable antibacterial performance after being subjected to surface modification of the silane coupling agent, and then the nano titanium dioxide with antibacterial performance is grafted and adsorbed on the surface of cellulose, so that the cellulose has good antibacterial performance, and the antibacterial and mildew-proof performances of the resin after the cellulose is added can be enhanced.
Description
Technical Field
The invention relates to the technical field of high polymer materials, in particular to a preparation method and application of modified cellulose.
Background
Cellulose is a macromolecular polysaccharide composed of glucose, is insoluble in water and common organic solvents, is a main component of plant cell walls, and is usually combined with hemicellulose, pectin and lignin in a manner and to a degree that greatly affects the texture of plant-derived foods. The change of the texture of the plant during maturation and after maturation is caused by the change of pectic substances, and the cellulose is also an important dietary fiber and is the polysaccharide with the widest distribution and the highest content in the nature.
The cellulose has wide application, can be used as an enhancer in high polymer resin, and can be prepared into tableware with different shapes by hot pressing, and more additional properties, such as antibacterial property, can be given to the resin by adding the modified cellulose.
Disclosure of Invention
Technical problem to be solved
In view of the above-mentioned shortcomings of the prior art, the present invention provides a preparation method and application of modified cellulose, which aims to prepare cellulose with better hydrophobicity and antibacterial property, and make it better for being applied to the enhancement of tableware resin.
Technical proposal
In order to achieve the above purpose, the invention is realized by the following technical scheme:
a method for preparing modified cellulose, the method comprising the steps of:
s1, preparing self-made cellulose components by taking crop straws and bagasse as raw materials, weighing 1-2 parts by weight of self-made cellulose components, dispersing the self-made cellulose components in 100 parts by weight of deionized water, and preparing cellulose suspension after ultrasonic dispersion;
s2, mixing the cellulose suspension in the S1 with 150-160 parts by weight of absolute ethyl alcohol, adding 3-4 parts by weight of octadecanoic acid after ultrasonic treatment, stirring for 5-6 hours at the temperature of 80 ℃ for reaction, centrifuging after the reaction is finished, washing the precipitate 3 times by using absolute ethyl alcohol, and recording the obtained precipitate as octadecanoic acid modified cellulose;
s3, adsorbing an antibacterial agent on the surface of the nano titanium dioxide to prepare antibacterial titanium dioxide, and carrying out surface modification on the antibacterial titanium dioxide by using a silane coupling agent to prepare modified titanium dioxide;
s4, mixing octadecanoic acid modified cellulose, modified titanium dioxide and isopropanol according to the following ratio of 3:2:20, stirring and mixing, putting the mixture at 70-72 ℃ after stirring and mixing, removing isopropanol by rotary evaporation, and drying the obtained components to obtain the modified cellulose.
Further, the preparation steps of the self-made cellulose component in the S1 are as follows:
step 1, crushing crop straws to a length of 0.5-0.8mm, pouring the crushed crop straws into deionized water, soaking the crushed crop straws for 15-20min, filtering to remove filtrate, drying the filtrate in an oven at 45-48 ℃ for 3-5h, and then performing treatment according to the formula 1:20 in nitric acid-ethanol solution, heating to 75-90 ℃ and standing for 3-5h for reaction, washing 3 times with ethanol after the reaction is finished, drying in a baking oven at 48-50 ℃ for 3-5h, crushing and sieving with a 200-mesh sieve to obtain a first cellulose component;
step 2, crushing bagasse, sieving with a 50-mesh sieve, pouring into deionized water, soaking for 18-20min, filtering to remove filtrate, drying in a baking oven at 48-50 ℃ for 4-5h, then placing in a sodium hydroxide solution for boiling water bath for 1-2h, washing to be neutral, bleaching with a hydrogen peroxide solution for two times at the temperature of 75 ℃, washing again to be neutral, placing in a baking oven at 48-50 ℃ for drying for 4-5h, crushing, sieving with a 200-mesh sieve, and marking as a second cellulose component;
and step 3, mixing the first cellulose component and the second cellulose component according to the equal weight ratio, and obtaining the self-made cellulose component after mixing.
Further, the nitric acid-ethanol solution in the step 1 is prepared by mixing nitric acid with the volume concentration of 40% and absolute ethanol according to the equal volume ratio.
Further, the volume concentration of the sodium hydroxide solution in the step 2 is 45%, and the volume concentration of the hydrogen peroxide solution in the step 2 is 30%.
Further, the frequency of ultrasonic dispersion in the step S1 is 26-28kHz, and the time of ultrasonic dispersion is 5-6min.
Further, the specific steps of the ultrasonic treatment in S2 are as follows: placing into an ultrasonic cleaner, and performing ultrasonic treatment at a power of 1-2kW for 25-30min, wherein the rotating speed of S2 centrifugation is 6000-8000r/min.
Further, the preparation method of the antibacterial titanium dioxide in the step S3 comprises the following steps: 18-25 parts by weight of nano titanium dioxide is weighed and dispersed in 200-300 parts by weight of absolute ethyl alcohol, then 1-2 parts by weight of tetradecyldimethyl decyl ammonium bromide, 2-3 parts by weight of dodecyl dimethyl decyl ammonium bromide, 1-2 parts by weight of dodecyl dimethyl benzyl ammonium chloride, 1-2 parts by weight of didecyl dimethyl ammonium chloride and 1-2 parts by weight of hexadecyl trimethyl ammonium chloride are added, ultrasonic dispersion is carried out for 30min under the condition of power of 32-35kHz, and the obtained precipitate is the antibacterial titanium dioxide after filtration.
Further, the preparation method of the modified titanium dioxide in the step S3 comprises the following steps: dispersing 8-10 parts by weight of antibacterial titanium dioxide in 65-70 parts by weight of isopropanol, then adding 5-6 parts by weight of 3-aminopropyl triethoxysilane, stirring at a stirring speed of 200-300r/min for 15-20min, and then placing the mixture at a temperature of 70 ℃ for rotary evaporation to remove the isopropanol, thus obtaining the modified titanium dioxide.
Further, the stirring speed of stirring and mixing in the step S4 is 100-200r/min, the drying temperature in the step S4 is 45-48 ℃, and the drying time is 2-3h.
The application of the modified cellulose is that the modified cellulose is prepared by the preparation method of the modified cellulose, and the modified cellulose is applied to the coating enhancement, and the specific application is as follows: adding the modified cellulose into the resin with the required compatibility according to the weight ratio of 2-3%, stirring and mixing, and hot-pressing to prepare the tableware.
Advantageous effects
The invention provides a preparation method and application of modified cellulose, and compared with the prior art, the preparation method has the following beneficial effects:
the invention prepares the cellulose by taking the crop straws and the bagasse as raw materials, which not only can play a role in recycling waste, but also can reduce the production cost of the cellulose; secondly, performing hydrophobic modification on cellulose by using octadecanoic acid, wherein the carboxyl on the surface of the octadecanoic acid and the hydroxyl on the surface of the cellulose can be subjected to dehydration reaction in the modification, so that a hydrophobic group is introduced on the surface of the cellulose, and the cellulose has stable hydrophobic performance; finally, according to the invention, different types of quaternary ammonium salt antibacterial agents are adsorbed in the pore diameter structure of the surface of the nano titanium dioxide, the nano carbon dioxide can have stable antibacterial performance after being subjected to surface modification by the silane coupling agent, and then the nano titanium dioxide with antibacterial performance is grafted and adsorbed on the surface of cellulose, so that the cellulose has better antibacterial performance, and the antibacterial and mildew-proof performances of the resin after the cellulose is added can be enhanced, therefore, the modified cellulose prepared by the invention has better application prospect in the field of tableware resin.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below. It will be apparent that the described embodiments are some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention is further described below with reference to examples.
Example 1
The preparation method of the modified cellulose comprises the following preparation steps:
s1, preparing a self-made cellulose component by taking crop straws and bagasse as raw materials, then weighing 1 part by weight of the self-made cellulose component, dispersing the self-made cellulose component in 100 parts by weight of deionized water, and preparing a cellulose suspension after ultrasonic dispersion, wherein the frequency of ultrasonic dispersion is 26kHz, and the time of ultrasonic dispersion is 5min;
wherein, the preparation steps of the self-made cellulose component in S1 are as follows:
step 1, crushing crop straws to be 0.5mm in length, pouring the crushed crop straws into deionized water, soaking the crushed crop straws for 15min, filtering to remove filtrate, drying the filtrate in an oven at 45 ℃ for 3h, and then carrying out the steps of: 20 in a nitric acid-ethanol solution, heating to 75 ℃, standing for 3 hours for reaction, washing 3 times with ethanol after the reaction is finished, drying in a baking oven at 48 ℃ for 3 hours, crushing, sieving with a 200-mesh sieve, and mixing nitric acid with the volume concentration of 40% and absolute ethanol according to an equal volume ratio.
Step 2, crushing bagasse, sieving with a 50-mesh sieve, pouring into deionized water, soaking for 18min, filtering to remove filtrate, drying in a 48-mesh oven for 4h, then placing in a 45-volume-concentration sodium hydroxide solution for boiling water bath for 1h, washing to be neutral, bleaching with a 30-volume-concentration hydrogen peroxide solution for two times at a temperature of 75 ℃, washing again to be neutral, placing in a 48-mesh oven for drying for 4h, crushing, sieving with a 200-mesh sieve, and marking as a second cellulose component;
and step 3, mixing the first cellulose component and the second cellulose component according to the equal weight ratio, and obtaining the self-made cellulose component after mixing.
S2, mixing the cellulose suspension in the S1 with 150 parts by weight of absolute ethyl alcohol, adding 3 parts by weight of octadecanoic acid after ultrasonic treatment, stirring for 5 hours at the temperature of 80 ℃ for reaction, centrifuging after the reaction is finished, washing the precipitate 3 times by using the absolute ethyl alcohol, and recording the obtained precipitate as octadecanoic acid modified cellulose;
the specific steps of ultrasonic treatment are as follows: the mixture was placed in an ultrasonic cleaner and subjected to ultrasonic treatment at a power of 1kW for 25min, and the rotational speed of S2 centrifugation was 6000r/min.
S3, adsorbing an antibacterial agent on the surface of the nano titanium dioxide to prepare antibacterial titanium dioxide, and carrying out surface modification on the antibacterial titanium dioxide by using a silane coupling agent to prepare modified titanium dioxide;
the preparation method of the antibacterial titanium dioxide in the S3 comprises the following steps: 18 parts by weight of nano titanium dioxide is weighed and dispersed in 200 parts by weight of absolute ethyl alcohol, then 1 part by weight of tetradecyldimethyl decyl ammonium bromide, 2 parts by weight of dodecyl dimethyl decyl ammonium bromide, 1 part by weight of dodecyl dimethyl benzyl ammonium chloride, 1 part by weight of didecyl dimethyl ammonium chloride and 1 part by weight of hexadecyl trimethyl ammonium chloride are added, ultrasonic dispersion is carried out for 30 minutes under the condition that the power is 32kHz, and the obtained precipitate is the antibacterial titanium dioxide after filtration.
The preparation method of the modified titanium dioxide in the S3 comprises the following steps: 8 parts by weight of antibacterial titanium dioxide is dispersed in 65 parts by weight of isopropanol, then 5 parts by weight of 3-aminopropyl triethoxysilane is added, stirring is carried out for 15min at a stirring speed of 200r/min, and then the obtained mixture is subjected to rotary evaporation at a temperature of 70 ℃ to remove the isopropanol, so that the modified titanium dioxide is obtained.
S4, mixing octadecanoic acid modified cellulose, modified titanium dioxide and isopropanol according to the following ratio of 3:2:20, and after the stirring and mixing are completed, placing the mixture at a temperature of 70 ℃ for rotary evaporation to remove isopropanol, and drying the obtained components to obtain the modified cellulose, wherein the stirring speed of the stirring and mixing is 100r/min, the drying temperature is 45 ℃, and the drying time is 2h.
The application of the modified cellulose is that the modified cellulose is prepared by the preparation method of the modified cellulose, and the modified cellulose is applied to the coating enhancement, and the specific application is as follows: adding the modified cellulose into the resin with the required property to be enhanced according to the weight ratio of 2%, stirring and mixing, and then hot-pressing to prepare the tableware.
Example 2
The preparation method of the modified cellulose comprises the following preparation steps:
s1, preparing a self-made cellulose component by taking crop straws and bagasse as raw materials, then weighing 2 parts by weight of the self-made cellulose component, dispersing the self-made cellulose component in 100 parts by weight of deionized water, and preparing a cellulose suspension after ultrasonic dispersion, wherein the frequency of ultrasonic dispersion is 28kHz, and the time of ultrasonic dispersion is 6min;
wherein, the preparation steps of the self-made cellulose component in S1 are as follows:
step 1, crushing crop straws to be 0.8mm in length, pouring the crushed crop straws into deionized water, soaking the crushed crop straws for 20min, filtering to remove filtrate, drying the filtrate in an oven at 48 ℃ for 5h, and then carrying out the steps of: 20 in a nitric acid-ethanol solution, heating to 90 ℃, standing for 5 hours for reaction, washing 3 times by ethanol after the reaction is finished, placing in a 50 ℃ oven for drying for 5 hours, crushing and sieving by a 200-mesh sieve to obtain a first cellulose component, wherein the nitric acid-ethanol solution is prepared by mixing nitric acid with the volume concentration of 40% and absolute ethanol according to the equal volume ratio.
Step 2, crushing bagasse, sieving with a 50-mesh sieve, pouring into deionized water, soaking for 20min, filtering to remove filtrate, drying in a 50-mesh oven for 5h, then placing in a 45-volume-concentration sodium hydroxide solution for 2h in a boiling water bath, washing to be neutral, bleaching with a 30-volume-concentration hydrogen peroxide solution for two times at a temperature of 75 ℃, washing again to be neutral, placing in a 50-mesh oven for drying for 5h, crushing, sieving with a 200-mesh sieve, and marking as a second cellulose component;
and step 3, mixing the first cellulose component and the second cellulose component according to the equal weight ratio, and obtaining the self-made cellulose component after mixing.
S2, mixing the cellulose suspension in the S1 with 160 parts by weight of absolute ethyl alcohol, adding 4 parts by weight of octadecanoic acid after ultrasonic treatment, stirring for 6 hours at the temperature of 80 ℃ to react, centrifuging after the reaction is finished, washing the precipitate with the absolute ethyl alcohol for 3 times, and recording the obtained precipitate as octadecanoic acid modified cellulose;
the specific steps of ultrasonic treatment are as follows: the mixture is placed in an ultrasonic cleaner to be treated by ultrasonic with power of 2kW for 30min, and the rotating speed of S2 centrifugation is 8000r/min.
S3, adsorbing an antibacterial agent on the surface of the nano titanium dioxide to prepare antibacterial titanium dioxide, and carrying out surface modification on the antibacterial titanium dioxide by using a silane coupling agent to prepare modified titanium dioxide;
the preparation method of the antibacterial titanium dioxide in the S3 comprises the following steps: 25 parts by weight of nano titanium dioxide is weighed and dispersed in 300 parts by weight of absolute ethyl alcohol, then 2 parts by weight of tetradecyldimethyl decyl ammonium bromide, 3 parts by weight of dodecyl dimethyl decyl ammonium bromide, 2 parts by weight of dodecyl dimethyl benzyl ammonium chloride, 2 parts by weight of didecyl dimethyl ammonium chloride and 2 parts by weight of hexadecyl trimethyl ammonium chloride are added, ultrasonic dispersion is carried out for 30 minutes under the condition of 35kHz of power, and the obtained precipitate is the antibacterial titanium dioxide after filtration.
The preparation method of the modified titanium dioxide in the S3 comprises the following steps: 10 parts by weight of antibacterial titanium dioxide is dispersed in 70 parts by weight of isopropanol, then 6 parts by weight of 3-aminopropyl triethoxysilane is added, stirring is carried out for 20min at a stirring speed of 300r/min, and then the obtained mixture is subjected to rotary evaporation at a temperature of 70 ℃ to remove the isopropanol, so that the modified titanium dioxide is obtained.
S4, mixing octadecanoic acid modified cellulose, modified titanium dioxide and isopropanol according to the following ratio of 3:2:20, and after the stirring and mixing are completed, placing the mixture at a temperature of 72 ℃ to remove isopropanol by rotary evaporation, and drying the obtained components to obtain the modified cellulose, wherein the stirring speed of the stirring and mixing is 200r/min, the drying temperature is 48 ℃, and the drying time is 3h.
The application of the modified cellulose is that the modified cellulose is prepared by the preparation method of the modified cellulose, and the modified cellulose is applied to the coating enhancement, and the specific application is as follows: adding the modified cellulose into the resin with the required property to be enhanced according to the weight ratio of 3%, stirring and mixing, and then hot-pressing to prepare the tableware.
Example 3
The preparation method of the modified cellulose comprises the following preparation steps:
s1, preparing a self-made cellulose component by taking crop straws and bagasse as raw materials, then weighing 2 parts by weight of the self-made cellulose component, dispersing the self-made cellulose component in 100 parts by weight of deionized water, and preparing a cellulose suspension after ultrasonic dispersion, wherein the frequency of ultrasonic dispersion is 27kHz, and the time of ultrasonic dispersion is 6min;
wherein, the preparation steps of the self-made cellulose component in S1 are as follows:
step 1, crushing crop straws to be 0.7mm in length, pouring the crushed crop straws into deionized water, soaking the crushed crop straws for 18min, filtering to remove filtrate, drying the filtrate in an oven at 46 ℃ for 4h, and then carrying out the steps of: 20 in a nitric acid-ethanol solution, heating to 82 ℃, standing for 4 hours for reaction, washing 3 times by ethanol after the reaction is finished, drying for 4 hours in a baking oven at 49 ℃, crushing and sieving by a 200-mesh sieve to obtain a first cellulose component, wherein the nitric acid-ethanol solution is prepared by mixing nitric acid with the volume concentration of 40% and absolute ethanol according to the equal volume ratio.
Step 2, crushing bagasse, sieving with a 50-mesh sieve, pouring into deionized water, soaking for 19min, filtering to remove filtrate, drying in an oven at 49 ℃ for 5h, then placing in a sodium hydroxide solution with the volume concentration of 45% for 2h, washing to be neutral, bleaching with a hydrogen peroxide solution with the volume concentration of 30% at the temperature of 75 ℃ for two times, washing again to be neutral, placing in an oven at 49 ℃ for drying for 5h, crushing, sieving with a 200-mesh sieve, and marking as a second cellulose component;
and step 3, mixing the first cellulose component and the second cellulose component according to the equal weight ratio, and obtaining the self-made cellulose component after mixing.
S2, mixing the cellulose suspension in the S1 with 155 parts by weight of absolute ethyl alcohol, adding 4 parts by weight of octadecanoic acid after ultrasonic treatment, stirring for 6 hours at the temperature of 80 ℃ to react, centrifuging after the reaction is finished, washing the precipitate for 3 times by using the absolute ethyl alcohol, and recording the obtained precipitate as octadecanoic acid modified cellulose;
the specific steps of ultrasonic treatment are as follows: the mixture was placed in an ultrasonic cleaner and subjected to ultrasonic treatment at a power of 2kW for 28min, and the rotational speed of S2 centrifugation was 7000r/min.
S3, adsorbing an antibacterial agent on the surface of the nano titanium dioxide to prepare antibacterial titanium dioxide, and carrying out surface modification on the antibacterial titanium dioxide by using a silane coupling agent to prepare modified titanium dioxide;
the preparation method of the antibacterial titanium dioxide in the S3 comprises the following steps: 22 parts by weight of nano titanium dioxide is weighed and dispersed in 250 parts by weight of absolute ethyl alcohol, then 2 parts by weight of tetradecyldimethyl decyl ammonium bromide, 2 parts by weight of dodecyl dimethyl benzyl ammonium chloride, 2 parts by weight of didecyl dimethyl ammonium chloride and 2 parts by weight of hexadecyl trimethyl ammonium chloride are added, ultrasonic dispersion is carried out for 30 minutes under the condition of power of 33kHz, and the obtained precipitate is the antibacterial titanium dioxide after filtration.
The preparation method of the modified titanium dioxide in the S3 comprises the following steps: 9 parts by weight of antibacterial titanium dioxide is dispersed in 68 parts by weight of isopropanol, then 6 parts by weight of 3-aminopropyl triethoxysilane is added, stirring is carried out for 18min at a stirring speed of 300r/min, and then the obtained mixture is subjected to rotary evaporation at a temperature of 70 ℃ to remove the isopropanol, so that the modified titanium dioxide is obtained.
S4, mixing octadecanoic acid modified cellulose, modified titanium dioxide and isopropanol according to the following ratio of 3:2:20, and after the stirring and mixing are completed, placing the mixture at a temperature of 71 ℃ for rotary evaporation to remove isopropanol, and drying the obtained components to obtain the modified cellulose, wherein the stirring speed of the stirring and mixing is 200r/min, the drying temperature is 47 ℃, and the drying time is 3h.
The application of the modified cellulose is that the modified cellulose is prepared by the preparation method of the modified cellulose, and the modified cellulose is applied to the coating enhancement, and the specific application is as follows: adding the modified cellulose into the resin with the required property to be enhanced according to the weight ratio of 2%, stirring and mixing, and then hot-pressing to prepare the tableware.
Comparative example 1
The preparation method of the modified cellulose provided in this comparative example is substantially the same as that of example 1, with the main differences that: this comparative example 1 replaces the octadecanoic acid of example 1 with the hydrophobe monomer bromododecane.
Comparative example 2
The preparation method of the modified cellulose provided in this comparative example is substantially the same as that of example 1, with the main differences that: this comparative example 2 replaces the antibacterial agent added in the preparation method of antibacterial titanium dioxide in example 1 with tetradecyldimethyl decyl ammonium bromide in its entirety, and the weight parts of the added antibacterial agent are unchanged.
Performance testing
The modified celluloses prepared in examples 1-3 and comparative examples 1-2 were labeled as example 1, example 2, example 3, comparative example 1 and comparative example 2, respectively, and then the properties of examples 1-3 and comparative examples 1-2 were examined, with the following specific examination methods and examination items:
1. the modified celluloses of examples 1-3 and comparative examples 1-2 were tested for water contact angle, and the data obtained are recorded in the following table;
2. the antibacterial properties of the modified celluloses of examples 1 to 3 and comparative examples 1 to 2 were tested, and the obtained data are recorded in the following table;
as shown by the data in the above table, the modified cellulose in the present examples 1 to 3 has a higher water contact angle, and the degree of the water contact angle is far greater than 90 °, which can indicate that the modified cellulose in the present examples 1 to 3 has a better hydrophobic property, and indicates that the hydrophobic property of the prepared hydrophobic cellulose using octadecanoic acid as the hydrophobic agent is better than the hydrophobic property of the hydrophobic cellulose prepared by bromododecane as the hydrophobic agent monomer in comparative example 1; secondly, the antibacterial rate of the modified cellulose in the present examples 1 to 3 is significantly higher than that of comparative example 2, indicating that different antibacterial agents are compatible with each other to exert a better antibacterial effect.
In conclusion, the modified cellulose prepared by the preparation method of the modified cellulose has better antibacterial property and hydrophobic property, and has excellent application prospect in the field of tableware resin.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A method for preparing modified cellulose, comprising the steps of:
s1, preparing self-made cellulose components by taking crop straws and bagasse as raw materials, weighing 1-2 parts by weight of self-made cellulose components, dispersing the self-made cellulose components in 100 parts by weight of deionized water, and preparing cellulose suspension after ultrasonic dispersion;
s2, mixing the cellulose suspension in the S1 with 150-160 parts by weight of absolute ethyl alcohol, adding 3-4 parts by weight of octadecanoic acid after ultrasonic treatment, stirring for 5-6 hours at the temperature of 80 ℃ for reaction, centrifuging after the reaction is finished, washing the precipitate 3 times by using absolute ethyl alcohol, and recording the obtained precipitate as octadecanoic acid modified cellulose;
s3, adsorbing an antibacterial agent on the surface of the nano titanium dioxide to prepare antibacterial titanium dioxide, and carrying out surface modification on the antibacterial titanium dioxide by using a silane coupling agent to prepare modified titanium dioxide;
s4, mixing octadecanoic acid modified cellulose, modified titanium dioxide and isopropanol according to the following ratio of 3:2:20, stirring and mixing, putting the mixture at 70-72 ℃ after stirring and mixing, removing isopropanol by rotary evaporation, and drying the obtained components to obtain the modified cellulose.
2. The method for preparing modified cellulose according to claim 1, wherein the step of preparing the homemade cellulose component in S1 comprises the steps of:
step 1, crushing crop straws to a length of 0.5-0.8mm, pouring the crushed crop straws into deionized water, soaking the crushed crop straws for 15-20min, filtering to remove filtrate, drying the filtrate in an oven at 45-48 ℃ for 3-5h, and then performing treatment according to the formula 1:20 in nitric acid-ethanol solution, heating to 75-90 ℃ and standing for 3-5h for reaction, washing 3 times with ethanol after the reaction is finished, drying in a baking oven at 48-50 ℃ for 3-5h, crushing and sieving with a 200-mesh sieve to obtain a first cellulose component;
step 2, crushing bagasse, sieving with a 50-mesh sieve, pouring into deionized water, soaking for 18-20min, filtering to remove filtrate, drying in a baking oven at 48-50 ℃ for 4-5h, then placing in a sodium hydroxide solution for boiling water bath for 1-2h, washing to be neutral, bleaching with a hydrogen peroxide solution for two times at the temperature of 75 ℃, washing again to be neutral, placing in a baking oven at 48-50 ℃ for drying for 4-5h, crushing, sieving with a 200-mesh sieve, and marking as a second cellulose component;
and step 3, mixing the first cellulose component and the second cellulose component according to the equal weight ratio, and obtaining the self-made cellulose component after mixing.
3. The method for preparing modified cellulose according to claim 2, wherein the nitric acid-ethanol solution in step 1 is prepared by mixing nitric acid with a volume concentration of 40% and absolute ethanol according to an equal volume ratio.
4. The method for preparing modified cellulose according to claim 2, wherein the volume concentration of the sodium hydroxide solution in the step 2 is 45%, and the volume concentration of the hydrogen peroxide solution in the step 2 is 30%.
5. The method for preparing modified cellulose according to claim 1, wherein the frequency of ultrasonic dispersion in S1 is 26-28kHz, and the time of ultrasonic dispersion is 5-6min.
6. The method for preparing modified cellulose according to claim 1, wherein the specific steps of the ultrasonic treatment in S2 are as follows: placing into an ultrasonic cleaner, and performing ultrasonic treatment at a power of 1-2kW for 25-30min, wherein the rotating speed of S2 centrifugation is 6000-8000r/min.
7. The method for preparing modified cellulose according to claim 1, wherein the method for preparing antibacterial titanium dioxide in S3 comprises the steps of: 18-25 parts by weight of nano titanium dioxide is weighed and dispersed in 200-300 parts by weight of absolute ethyl alcohol, then 1-2 parts by weight of tetradecyldimethyl decyl ammonium bromide, 2-3 parts by weight of dodecyl dimethyl decyl ammonium bromide, 1-2 parts by weight of dodecyl dimethyl benzyl ammonium chloride, 1-2 parts by weight of didecyl dimethyl ammonium chloride and 1-2 parts by weight of hexadecyl trimethyl ammonium chloride are added, ultrasonic dispersion is carried out for 30min under the condition of power of 32-35kHz, and the obtained precipitate is the antibacterial titanium dioxide after filtration.
8. The method for preparing modified cellulose according to claim 1, wherein the method for preparing modified titanium dioxide in S3 comprises the steps of: dispersing 8-10 parts by weight of antibacterial titanium dioxide in 65-70 parts by weight of isopropanol, then adding 5-6 parts by weight of 3-aminopropyl triethoxysilane, stirring at a stirring speed of 200-300r/min for 15-20min, and then placing the mixture at a temperature of 70 ℃ for rotary evaporation to remove the isopropanol, thus obtaining the modified titanium dioxide.
9. The method for preparing modified cellulose according to claim 1, wherein the stirring speed of the stirring and mixing in S4 is 100-200r/min, the drying temperature in S4 is 45-48 ℃, and the drying time is 2-3h.
10. Use of a modified cellulose as defined in any one of claims 1 to 9 in the preparation of a modified cellulose for the reinforcement of resins, in particular: adding the modified cellulose into the resin with the required compatibility according to the weight ratio of 2-3%, stirring and mixing, and hot-pressing to prepare the tableware.
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005289660A (en) * | 2004-03-31 | 2005-10-20 | Toto Ltd | Surface-modified titanium dioxide particulate and dispersion thereof and method for manufacturing the same |
| CN105088776A (en) * | 2015-09-11 | 2015-11-25 | 江苏锦宇环境工程有限公司 | Preparation method for degradable cellulose antibacterial agent |
| US20180119334A1 (en) * | 2015-06-05 | 2018-05-03 | Cornell University | Modified cellulosic compositions having increased hydrophobicity and processes for their production |
| CN108840954A (en) * | 2018-05-29 | 2018-11-20 | 华南理工大学 | A kind of preparation method for the cellulose micro-nano crystalline substance that surface hydrophobicity is modified |
| CN109627345A (en) * | 2018-12-06 | 2019-04-16 | 广西大学 | A kind of preparation method and application of sugarcane top hydrophobically modified nano-cellulose |
| JP2020128513A (en) * | 2019-02-12 | 2020-08-27 | 日本製紙株式会社 | Tableware complex and molding |
| CN113773404A (en) * | 2021-07-23 | 2021-12-10 | 天津科技大学 | Super-hydrophobic modification method of nano-cellulose |
| CN115992453A (en) * | 2022-12-06 | 2023-04-21 | 中国制浆造纸研究院有限公司 | Hydrophobic nanocellulose powder and preparation method thereof |
| CN116023112A (en) * | 2023-03-27 | 2023-04-28 | 广州市泓景首饰铸造材料有限公司 | Gypsum material for jewelry mold and preparation method thereof |
-
2023
- 2023-12-25 CN CN202311796119.XA patent/CN117510996B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005289660A (en) * | 2004-03-31 | 2005-10-20 | Toto Ltd | Surface-modified titanium dioxide particulate and dispersion thereof and method for manufacturing the same |
| US20180119334A1 (en) * | 2015-06-05 | 2018-05-03 | Cornell University | Modified cellulosic compositions having increased hydrophobicity and processes for their production |
| CN105088776A (en) * | 2015-09-11 | 2015-11-25 | 江苏锦宇环境工程有限公司 | Preparation method for degradable cellulose antibacterial agent |
| CN108840954A (en) * | 2018-05-29 | 2018-11-20 | 华南理工大学 | A kind of preparation method for the cellulose micro-nano crystalline substance that surface hydrophobicity is modified |
| CN109627345A (en) * | 2018-12-06 | 2019-04-16 | 广西大学 | A kind of preparation method and application of sugarcane top hydrophobically modified nano-cellulose |
| JP2020128513A (en) * | 2019-02-12 | 2020-08-27 | 日本製紙株式会社 | Tableware complex and molding |
| CN113773404A (en) * | 2021-07-23 | 2021-12-10 | 天津科技大学 | Super-hydrophobic modification method of nano-cellulose |
| CN115992453A (en) * | 2022-12-06 | 2023-04-21 | 中国制浆造纸研究院有限公司 | Hydrophobic nanocellulose powder and preparation method thereof |
| CN116023112A (en) * | 2023-03-27 | 2023-04-28 | 广州市泓景首饰铸造材料有限公司 | Gypsum material for jewelry mold and preparation method thereof |
Non-Patent Citations (3)
| Title |
|---|
| WENKAI ZHU等: "Synthesis and characterisation of superhydrophobic CNC/ZnO nanocomposites by using stearic acid", 《MICRO & NANO LETTERS》, vol. 14, no. 13, 31 December 2019 (2019-12-31) * |
| 朱文凯;吴燕;曹坤丽;: "疏水型纳米纤维素/纳米ZnO复合材料的制备及性能表征", 科技创新与应用, no. 23, 18 August 2016 (2016-08-18) * |
| 杨峰 等: "硬脂酸/TiO2/CNF超疏水复合材料的制备与表征", 《林产工业》, vol. 46, no. 1, 31 December 2019 (2019-12-31) * |
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