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A kind of modified chitosan-silicon dioxide composite airgel material and its preparation method and application

A composite airgel and silica technology, which is applied in the field of textile finishing, can solve the problems of easy adsorption, good oil adsorption performance, and easy dirt of jacket fabrics

Active Publication Date: 2019-03-15
SUZHOU TANGHUA NANO TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The main function of the jacket is to keep warm from the cold, but the jackets currently on the market mainly achieve the effect of keeping warm by adding a thermal lining, and the fabric has no thermal performance, so the warmer the jacket, the thicker the lining, and the more bloated it looks
[0003] As a high-efficiency thermal insulation material, silica airgel is currently widely used in the building materials industry. Its thermal insulation effect is excellent, and its thermal conductivity is lower than 0.013W / m·K. The layer is coated on the fabric to form a high-efficiency thermal insulation fabric. However, although silica has good waterproof performance, its pore structure is very easy to absorb non-polar substances, that is, it is easy to absorb oil, which will cause the jacket fabric to be very easy to get dirty and reduce clothing. practicality
Although the composite airgel has improved the mechanical properties to a certain extent, the composite airgel also has the problem of good oil adsorption performance and easy to be dirty.

Method used

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  • A kind of modified chitosan-silicon dioxide composite airgel material and its preparation method and application
  • A kind of modified chitosan-silicon dioxide composite airgel material and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The present embodiment provides a modified chitosan-silicon dioxide composite airgel material, which is prepared through the following steps:

[0039] (1) Add 100g of trifluoroethanol, 96g of carbonic acid, and 19.6g of sulfuric acid into a 500ml three-necked flask, stir and heat to reflux, keep the temperature at 60°C, react for 10h, filter, and then add 200ml of cyclohexane to the filtrate Extraction. After extraction, add 10.2 g of acetic anhydride to the upper layer solution, stir and heat to reflux at 80° C. for 8 hours, and then distill to obtain white crystalline solid A.

[0040] (2) Add 270g of solid A, 108.16g of benzylamine, and 500ml of ethyl acetate into a 1000ml three-necked flask, heat, stir and reflux at 60°C for 5h, then distill at 80°C to obtain pale yellow needle-like solid B.

[0041] (3) Solid B was roasted at 200°C for 1 hour to obtain solid C, which is the airgel modification additive. The NMR data are as follows:

[0042] 1 H-NMR (400Hz) δ (ppm) ...

Embodiment 2

[0047] The present embodiment provides a chitosan-silicon dioxide composite airgel material, which is prepared through the following steps:

[0048] (1) Add 100 g of trifluoroethanol, 100 g of carbonic acid, and 20 g of sulfuric acid into a 500 ml three-neck flask, stir and heat to reflux, keep the temperature at 65° C., and filter after 12 hours of reaction, then add 200 ml of cyclohexane to the filtrate for extraction. After extraction, 10.5 g of acetic anhydride was added to the upper layer solution, stirred and heated to reflux at 85°C for 10 h, and then distilled to obtain white crystalline solid A.

[0049] (2) Add 280g of solid A, 110g of benzylamine, and 500ml of ethyl acetate into a 1000ml three-neck flask, heat, stir and reflux at 65°C for 5h, then distill at 85°C to obtain light yellow needle-like solid B.

[0050] (3) Calcining solid B at 210° C. for 1 h to obtain solid C, which is the airgel modification aid.

[0051] (4) Heat and stir 95g tetraethyl orthosilicat...

Embodiment 3

[0055] The present embodiment provides a chitosan-silicon dioxide composite airgel material, which is prepared through the following steps:

[0056] (1) Add 100g of trifluoroethanol, 90g of carbonic acid, and 19g of sulfuric acid into a 500ml three-necked flask, stir and heat to reflux, keep the temperature at 60°C, react for 8h, filter, then add 200ml of cyclohexane to the filtrate for extraction, After extraction, 10 g of acetic anhydride was added to the upper layer solution, stirred and heated to reflux at 80° C. for 8 h, and then distilled to obtain white crystalline solid A.

[0057] (2) Add 270g of solid A, 105g of benzylamine, and 500ml of ethyl acetate into a 1000ml three-neck flask, heat, stir and reflux at 60°C for 5h, then distill at 80°C to obtain light yellow needle-like solid B.

[0058] (3) Calcining solid B at 190° C. for 1 h to obtain solid C, which is the airgel modification aid.

[0059] (4) Take 92g tetraethyl orthosilicate, 28g chitosan, 4.5g citric acid...

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Abstract

The invention relates to a modified chitosan-silicon dioxide composite aerogel material as well as a preparation method and application thereof. According to the modified chitosan-silicon dioxide composite aerogel, a chitosan-silicon dioxide aerogel is modified by an aerogel modifying aid containing a fluorinated urethane monomer structure; by reacting active hydroxyl on the chitosan surface with amino of the modifying aid and grafting the surface of the composite aerogel with a group with waterproof and oil-proof properties, the pores of the aerogel are covered, and oily substances are no longer adsorbed; the silicon dioxide aerogel structure in the aerogel has a heat retention property; meanwhile, since chitosan has a property of forming an air- and moisture-permeable film, a coating with uniform thickness is formed on textile surface to realize comprehensive properties of water and oil proofing, moisture permeation and heat retention.

Description

technical field [0001] The invention belongs to the field of finishing of textiles, and relates to a modified chitosan-silicon dioxide composite airgel material and a preparation method thereof, which is applied to the finishing of textiles and forms a waterproof, oil-proof and moisture-permeable layer on the surface of textiles Warm coating, used as a jacket fabric. Background technique [0002] The main function of the jacket is to keep warm from the cold, but the jackets currently on the market mainly achieve the effect of keeping warm by adding a thermal lining, and the fabric has no thermal performance. As a result, the warmer the jacket, the thicker the lining, and the more bloated it looks. [0003] As a high-efficiency thermal insulation material, silica airgel is currently widely used in the building materials industry. Its thermal insulation effect is excellent, and its thermal conductivity is lower than 0.013W / m·K. The layer is coated on the fabric to form a high...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J3/075C09D175/04C09D105/08C09D7/61C09D7/63C09D5/16D06N3/14D06N3/00C08L5/08
CPCC08J3/075C08J2305/08C09D5/1656C09D5/1687C09D7/61C09D7/63C09D175/04D06N3/0063D06N3/0065D06N3/142D06N2201/0263C08L5/08C08K3/36C08K5/20
Inventor 陈艳珍王鹏曾桂香张仁海陈精明黄海彬
Owner SUZHOU TANGHUA NANO TECH
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