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A kind of ultraviolet reflection material based on nanocrystalline cellulose and preparation method thereof

A technology of nano-crystallization and reflective materials, which is applied in the direction of fiber treatment, fiber type, fiber chemical characteristics, etc., can solve the problems of low UV resistance and durability, decreased mechanical strength of the film, and poor compatibility, so as to achieve environmental protection and reliability. The effect of sustainable development

Active Publication Date: 2019-10-11
HENAN INST OF ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a film based on nanocrystalline cellulose for the deficiencies such as the decrease in film mechanical strength and the low durability of ultraviolet resistance caused by the poor compatibility between inorganic additives and film substrates. Ultraviolet reflective material and preparation method thereof

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The preparation method of the ultraviolet reflective material based on nanocrystalline cellulose of the present embodiment is as follows:

[0030] (1) Take 2g of polyacrylonitrile and 12g of ethylene carbonate and mix them in a conical flask, and carry out mechanical stirring for 60 minutes under the condition of heating in a water bath at 80°C until completely dissolved, and the mechanical stirring speed is 60r / min to obtain polyacrylonitrile Spinning solution 13.2g;

[0031] (2) Take 13 g of the spinning solution obtained in step (1) and put it into a syringe for electrospinning. The anode is connected to the needle, the cathode is connected to the aluminum foil receiver, and the flow rate of the syringe pump is 0.5 mL / h to obtain polyacrylonitrile spinning electrospinning. Fiber 11.7g;

[0032] (3) Use hydrochloric acid to adjust the pH value of ethanol to 3-4 to obtain a hydrochloric acid / ethanol system at room temperature, take 100g of γ-mercaptopropyltrimethoxysi...

Embodiment 2

[0039] The preparation method of the ultraviolet reflective material based on nanocrystalline cellulose of the present embodiment is as follows:

[0040](1) Take 3g of polyacrylonitrile and 21g of ethylene carbonate and mix them in a conical flask, and carry out mechanical stirring for 50 minutes under the condition of heating in a water bath at 80°C until completely dissolved, and the mechanical stirring speed is 60r / min to obtain polyacrylonitrile Spinning solution 22.6g;

[0041] (2) Take 20 g of the spinning solution obtained in step (1) and put it into a syringe for electrospinning. The anode is connected to the needle, the cathode is connected to the aluminum foil receiver, and the flow rate of the syringe pump is 1.0 mL / h to obtain polyacrylonitrile spinning electrospinning. Fiber 19.2g;

[0042] (3) Regulate the pH value of ethanol to 3-4 with hydrochloric acid at normal temperature to obtain hydrochloric acid / ethanol system, take 90g of γ-mercaptopropyl trimethoxysil...

Embodiment 3

[0049] The preparation method of the ultraviolet reflective material based on nanocrystalline cellulose of the present embodiment is as follows:

[0050] (1) Take 4g of polyacrylonitrile and 32g of ethylene carbonate and mix them in a conical flask, and carry out mechanical stirring for 50 minutes under the condition of heating in a water bath at 80°C until completely dissolved, and the mechanical stirring speed is 60r / min to obtain polyacrylonitrile Spinning solution 33.9g;

[0051] (2) Take 30 g of the spinning solution obtained in step (1) and put it into a syringe for electrospinning. The anode is connected to the needle, the cathode is connected to the aluminum foil receiver, and the flow rate of the syringe pump is 2.0 mL / h to obtain polyacrylonitrile spinning electrospinning. Fiber 27.5g;

[0052] (3) Use hydrochloric acid to adjust the pH value of ethanol to 3-4 at normal temperature to obtain a hydrochloric acid / ethanol system, take 120g of γ-mercaptopropyltrimethoxy...

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Abstract

The invention discloses an ultraviolet reflective material based on nanocrystalline cellulose and a preparation method of the ultraviolet reflective material. The ultraviolet reflective material is prepared by taking polyacrylonitrile electrospun fibers as a base material, and grafting the nanocrystalline cellulose to the surface of the base material by using a surface modification process, wherein the reflectivity of the ultraviolet reflective material for ultraviolet rays with the wavelength of 280nm when an incident angle is 30 degrees is greater than 70 percent, and the reflectivity of theultraviolet reflective material for the ultraviolet rays with the wavelength of 280nm when the incident angle is 45 degrees is greater than 90 percent. According to the ultraviolet reflective material disclosed by the invention, a hydrogen bond is formed by using active hydroxyl on the surface of the cellulose and hydrogen atoms with high electronegativity in a molecular structure of the polyacrylonitrile electrospun fiber, and a stable cross-linking structure is formed inside a connecting material structure; according to the preparation method disclosed by the invention, a membrane materialis prepared by using an electrospinning technology and the like, so that mass use of volatile pollutants such as an organic solvent can be avoided, and environmental protection and sustainable development are benefited.

Description

technical field [0001] The invention belongs to the technical field of composite material preparation, and in particular relates to an ultraviolet reflective material with polyacrylonitrile electrospun fibers as the base material and nano-grafted crystalline cellulose particles grafted on the base material as the main reflector. its preparation method. Background technique [0002] In recent years, the application of thin film materials has become increasingly widespread, and people's research on thin films has gradually deepened (Tang Jinfa, et al., Modern Optical Thin Film Technology, Zhejiang University Press, 2006; Zhuang Daming, Zhang Gong, Liu Jiajun, Research Status and Applications of Functional Thin Films Prospects, China Surface Engineering, Issue 4, 2001; Xue Chunrong, Yi Kui, Shao Jianda, Fan Zhengxiu, Optical Properties of Several Fluoride Film Materials, Optical Precision Engineering, Issue 7, 2009; Cao Longyi, Yu Zhibin, Edible Packaging Films Research Progre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M15/05D06M13/513D01F6/54D06M101/28
Inventor 张浩吕金燕庄洛欣洪亮朱明王娜
Owner HENAN INST OF ENG
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