Preparation method of nanocellulose hollow microspheres and coating material of nanocellulose hollow microspheres

A nano-cellulose, hollow technology, applied in the direction of coating, etc., can solve the problems of no public reports in the research, achieve good application prospects, increase the diffusion rate, and improve the dispersion effect

Active Publication Date: 2022-04-19
XI'AN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, there are no public reports on the research on nanocellulose hollow microsphere composites at home and abroad.

Method used

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  • Preparation method of nanocellulose hollow microspheres and coating material of nanocellulose hollow microspheres
  • Preparation method of nanocellulose hollow microspheres and coating material of nanocellulose hollow microspheres

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preparation example Construction

[0025] The embodiment of the present invention provides a preparation method of nanocellulose hollow microspheres, comprising the following steps:

[0026] Step 1, the nanocellulose is subjected to esterification surface modification to obtain a modified nanocellulose Pickering emulsifier;

[0027] Step 2, dispersing the modified nanocellulose Pickering emulsifier into deionized water to obtain a modified nanocellulose aqueous solution;

[0028] In step 3, the modified nanocellulose aqueous solution is used as the water phase, and the mixed solution of dichloromethane and acrylate monomer is used as the oil phase, and the nanocellulose hollow microsphere composite material is obtained by the Pickering emulsion polymerization method.

[0029] An embodiment of the present invention also provides a reinforced, toughened and highly air-permeable nanocellulose hollow microsphere coating material, which includes a nanocellulose hollow microsphere coating material and a film layer at...

Embodiment 1

[0033] 1) Preparation of modified nanocellulose Pickering emulsifier: prepare 70 parts of nanocellulose anhydrous pyridine solution, the mass concentration of nanocellulose anhydrous pyridine solution is 0.1g / mL, ultrasonic treatment for 10min, and then add it to a 100mL three-necked flask , add 30 parts of succinic anhydride, stir at room temperature for 6 hours, after the reaction, the modified nanocellulose is precipitated, then repeatedly washed with absolute ethanol, centrifuged, and then placed in a vacuum drying oven to constant weight to obtain a white Solid powder to prepare modified nano-cellulose Pickering emulsifier.

[0034] 2) Preparation of modified nanocellulose aqueous solution: Weigh 1 part of modified nanocellulose prepared in step 1, dissolve it in deionized water, and obtain modified nanocellulose aqueous solution; wherein, the mass concentration of modified nanocellulose solution 0.1g / mL.

[0035] 3) Preparation of nanocellulose hollow microsphere compos...

Embodiment 2

[0037] 1) Preparation of modified nanocellulose Pickering emulsifier: prepare 75 parts of nanocellulose anhydrous pyridine solution, the mass concentration of nanocellulose anhydrous pyridine solution is 0.1g / mL, ultrasonic treatment for 15min, and then add it to a 100mL three-necked flask , add 25 parts of acetic anhydride, and stir at room temperature for 8 hours. After the reaction, the nanocellulose after esterification modification is precipitated, then repeatedly washed with absolute ethanol, centrifuged, and then placed in a vacuum drying oven to constant weight to obtain a white The solid powder of esterified modified nanocellulose Pickering emulsifier was obtained.

[0038] 2) Preparation of modified nanocellulose aqueous solution: Weigh 1 part of modified nanocellulose prepared in step 1, dissolve it in deionized water, and obtain modified nanocellulose aqueous solution; wherein, the mass concentration of modified nanocellulose solution 0.1g / mL.

[0039]3) Preparati...

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Abstract

The invention discloses a nano-crystalline cellulose hollow microsphere composite material and a nano-crystalline cellulose hollow microsphere coating material, a preparation method comprises the following steps: firstly, carrying out esterification modification on nano-crystalline cellulose to obtain a modified nano-crystalline cellulose Pickering emulsifier; then, dispersing the modified nanocellulose Pickering emulsifier into deionized water, so as to obtain a modified nanocellulose aqueous solution; the nano-cellulose hollow microsphere composite material is obtained by taking a modified nano-cellulose aqueous solution as an aqueous solution and taking a dichloromethane and acrylate monomer mixed solution as an oil phase through a Pickering emulsion polymerization method. According to the invention, the unique properties and hollow structure of the nanocellulose are combined to prepare the reinforced and toughened nanocellulose hollow microsphere coating material with high air permeability, and compared with a solid modified nanocellulose emulsion, on one hand, the nanocellulose hollow microsphere composite material improves the dispersibility of the nanocellulose in a solvent and reduces agglomeration; and on the other hand, the hollow structure can shorten the gas molecule passing path, improve the gas diffusion rate and realize the air permeability of the coating while enhancing and toughening, so that the base material is endowed with good air permeability, and the application of the base material in the fields of fabrics, leather and the like is improved.

Description

technical field [0001] The invention relates to a preparation method of a nanocellulose hollow microsphere composite material and a coating material thereof, belonging to the technical field of nanocellulose composite materials. Background technique [0002] Nanocellulose is an emerging green nano-polymer material. It not only has excellent characteristics such as natural cellulose biodegradability and good biocompatibility, but also has large specific surface area, high aspect ratio, high strength, high rigidity and high These excellent properties have opened up new paths for its development and application in the fields of composite materials, energy, electronics, medicine, papermaking, food, textiles, etc. In recent years, nanocellulose has been used to strengthen high molecular polymers (such as polyvinyl alcohol, water-based polyurethane, polylactic acid, polycaprolactone, etc.), and a nanocellulose composite coating film with light weight, transparency and high strengt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F251/02C08F220/10C08F2/22C09D151/02
CPCC08F251/02C08F2/22C09D151/02C08F220/10
Inventor 张帆孙远见陶浩然宋冰瑶何佳
Owner XI'AN POLYTECHNIC UNIVERSITY
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