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Biodegradable nano composite material

A nanocomposite material and biodegradable technology, applied in the field of biodegradable nanocomposite materials, can solve the problems of unsuitable industrial production, complex process, complex process flow, etc., to achieve improved compatibility and dispersibility, simple production process, Good mechanical properties

Active Publication Date: 2020-04-17
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CN 103937182 A reports a biodegradable polyester / cellulose nanocomposite material and its preparation method. The method is to increase the compatibility between polycaprolactone and cellulose through a compatibilizer, but the compatibilizer is developed from Cyclopolymerization synthesis, complex process
CN 101077924A discloses a polyester / SiO 2 The preparation method of nanocomposite materials, this method is to disperse nanoparticles in polyester by in-situ copolymerization, the process is complicated, and it is not suitable for industrial production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 1. Modified nano filler

[0027] The first nanometer material selects silicon dioxide with a particle diameter of 30 nanometers: 98.5% of silicon dioxide is dissolved in 9850% water and ethanol mixed solution (mass ratio is 1:9) to obtain a filler organic solution; the added mass is 5% coupling agent (select γ-(2,3-glycidoxy) propyltrimethoxysilane) of the mass of silica, stir and react at 70°C, react for 8 hours, and dry after the reaction Modified fillers are obtained after treatment.

[0028] The second nanometer material selects the nanocellulose whose aspect ratio is 50: 90% nanocellulose is dissolved in 9760% water and ethanol mixed solution (mass ratio is 1:9), obtains filler organic solution; The coupling agent (γ-aminopropyltriethoxysilane) with 5% of the mass of nanocellulose was stirred and reacted at 70° C. for 8 hours. After the reaction was completed, the modified filler was obtained after drying treatment.

[0029] 2. First resin synthesis

[0030] Mix...

Embodiment 2

[0035] 1. Modified nano filler

[0036] Calcium carbonate with a particle size of 50 nanometers is selected as the first nanomaterial: 95% calcium carbonate is dissolved in 1000% water and ethanol mixed solution (mass ratio is 1:8) to obtain a filler organic solution; the added quality is calcium carbonate 5.5% of the mass of the coupling agent (gamma-aminopropyltriethoxysilane was selected) was stirred and reacted at 80° C. for 7.5 hours. After the reaction was completed, the modified filler was obtained after drying treatment.

[0037] The second nanomaterial selects the cellulose nanocrystal that aspect ratio is 20 for use: 88% cellulose nanocrystal is dissolved in 7760% water and ethanol mixed solution (mass ratio is 1:8), obtains filler organic solution; Add A coupling agent (γ-(2,3-epoxypropoxy)propyltrimethoxysilane) with a mass of 10% of the mass of cellulose nanocrystals was stirred and reacted at 70°C for 8 hours. After the reaction, The modified filler is obtained ...

Embodiment 3

[0044] 1. Modified nano filler

[0045] The first nanomaterial is composed of silicon dioxide with a particle size of 20 nm and calcium carbonate with a particle size of 30 in a mass ratio of 2:1: 20% of the first nanomaterial is dissolved in a 1950% mixed solution of water and ethanol (mass ratio is 1:9.5) to obtain filler organic solution; add a coupling agent (selecting isostearyl titanate isopropyl isopropyl titanate) whose mass is 19.5% of the mass of the first nanomaterial, and carry out stirring reaction at 85° C. After 2.5 hours, after the reaction is completed, the modified filler is obtained after drying treatment.

[0046] The second nanomaterial is composed of cellulose nanocrystals with an aspect ratio of 20 and cellulose nanofibers with an aspect ratio of 80 according to a mass ratio of 1:1: 38% of the second nanomaterial is dissolved in 4760% of water and In the ethanol mixed solution (mass ratio is 1:8.5), the filler organic solution is obtained; add a couplin...

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Abstract

The invention discloses a biodegradable nano composite material, which is prepared by the following steps: mixing polymer resin, a first nano filler, a compound stabilizer and an interfacial compatibilizer in a screw extruder to obtain a resin melt, and carrying out melt blending on the resin melt and a second nano filler. The modification groups on the surfaces of the two nano-fillers can be subjected to a chemical reaction, so that the second nano-filler is well dispersed in the composite material and well compatible with a polymer matrix, and the mechanical property of the biodegradable nano-composite material is improved.

Description

technical field [0001] The invention relates to the technical field of agricultural films, in particular to a biodegradable nanocomposite material. Background technique [0002] With the rapid development of economy and society, the widespread use of polymer materials, especially plastic films, sheets and plates, has brought great convenience to people's lives. Most of the current polymer materials, such as polyethylene, polypropylene, polyvinyl chloride and polystyrene, can be used as food packaging, stationery, tableware, craft electromechanical packaging and other products involving all aspects of life. However, these polymers are generally chemically stable and difficult to degrade. Their use, especially in the agricultural and packaging industries where disposable consumer products are used in large quantities, will cause serious white pollution. In fact, in agriculture, packaging and medical industries, many plastic products do not require a long service life, so vari...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08L67/04C08L1/02C08K9/06C08K3/36C08K3/26C08K13/06C08J5/18A01G13/02
CPCA01G13/0275C08J5/18C08J2367/02C08J2401/02C08J2467/04C08K3/36C08K9/06C08K13/06C08K2003/265C08K2201/011
Inventor 王文俊来蕾刘平伟李伯耿
Owner ZHEJIANG UNIV
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