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Preparation method of unsaturated lignocellulose material for polyurethane shape memory material

A technology of lignocellulose and polyurethane materials, which is applied in the field of preparation of unsaturated lignocellulose materials used in polyurethane shape memory materials, can solve the problems of shape memory materials application limitations, damaged structures, etc., and improve the thermally induced length recovery rate , Improvement range and good folding resistance and shape recovery rate

Inactive Publication Date: 2020-10-30
东阳市前途工业设计有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The existing inventions are all aimed at the research of thermotropic polyurethane shape memory materials. Although thermotropic shape memory polyurethane has a high shape recovery rate, simple operation and easy realization, in some heat-sensitive materials such as biomaterials, thermal stimulation will Destroying the structure of the original material leads to the limitation of the application of shape memory materials, while photoinduced shape memory polyurethane can avoid the damage to the original materials, greatly expanding the application range of shape memory materials, which is of great significance

Method used

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  • Preparation method of unsaturated lignocellulose material for polyurethane shape memory material
  • Preparation method of unsaturated lignocellulose material for polyurethane shape memory material
  • Preparation method of unsaturated lignocellulose material for polyurethane shape memory material

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Effect test

Embodiment 1

[0044] Add 60g of polytetrahydrofuran into the reaction kettle, and heat it to 100 while stirring at 200r / min o C, evacuate to -0.1MPa, keep for 2h, then cool down to 45 o C, feed high-purity nitrogen to standard atmospheric pressure, add 30g of hexamethylene diisocyanate, 1g of cinnamic acid, and heat up to 80 o C, react for 4 hours, evacuate to -0.1MPa, keep for 2 hours, and then pass nitrogen to standard atmospheric pressure to obtain a prepolymer reaction liquid; mix 10g of 1,4-butanediol, 5g of isophorone diamine, 7g of unsaturated wood The cellulose material and 0.1g of bis(ethylhexanoyloxy)tin were mixed evenly, and quickly added to the prepolymer reaction solution under nitrogen protection, stirred at 200r / min for 1min, and then poured into a Teflon mold. When the reaction solution turns into a gel, it is pressurized and solidified for 60 minutes, demolded, and then the product obtained is heated at 100 o After curing at C for 15 hours, a shape-recoverable polyuretha...

Embodiment 2

[0048] Add 63.1g of poly-4-methylbutyrolactone diol into the reactor, and heat it to 102.3 while stirring at 226.6r / min o C, evacuate to -0.1MPa, keep for 2h, then cool down to 47 o C, feed high-purity nitrogen to standard atmospheric pressure, add 31.5g of isophorone diisocyanate, 1.2g of methyl cinnamate, and heat up to 80.8 o C, reacted for 3.8 hours, evacuated to -0.1MPa, kept for 2.2 hours, and then passed nitrogen to standard atmospheric pressure to obtain a prepolymer reaction liquid; -Methylphenyl)methane, 7g unsaturated lignocellulosic material, and 0.1g of dibutylene dilaurate are mixed uniformly, and are quickly added to the prepolymer reaction solution under nitrogen protection, and stirred at 200r / min for 1.3min, Then pour into the Teflon mold, when the reaction solution becomes gel, pressurize and solidify for 56min, demold, then the product obtained o After curing at C for 16.8 hours, a shape-recoverable polyurethane material was obtained.

[0049] The unsatu...

Embodiment 3

[0052] Add 66.2g of polypropylene glycol into the reactor and heat to 106.6 while stirring at 244.3r / min o C, evacuate to -0.1MPa, keep for 2h, then cool down to 48 o C, feed high-purity nitrogen to standard atmospheric pressure, add 32.6g biuret triisocyanate, 1.5g ethyl cinnamate, and heat up to 81.9 o C, reacted for 3.5h, evacuated to -0.1MPa, kept for 2.3h, and then passed nitrogen to standard atmospheric pressure to obtain a prepolymer reaction solution; 12.4g of 1,4-butanediol, 3.9g of diaminodiethyltoluene, Mix 9g of unsaturated lignocellulosic material and 0.1g of dimethyltin dichloride evenly, quickly add it to the prepolymer reaction solution under nitrogen protection, stir at 200r / min for 1.8min, and then pour it into a Teflon mold , when the reaction solution turns into a gel, it is pressurized and solidified for 51.3 minutes, demolded, and then the obtained product is prepared at 104.6 o After curing at C for 19.1 hours, a shape-recoverable polyurethane material...

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Abstract

The invention discloses a preparation method of an unsaturated lignocellulose material for a polyurethane shape memory material. The preparation method comprises the following steps of: by mass, uniformly stirring 30-50 parts of lignocellulose, 59-80 parts of cinnamic acid, 5-12 parts of a D001 resin catalyst, 200-320 parts of water and 0.03-0.2 part of 1-carboxyethyl-3-methylimidazole nitrate, controlling the temperature to be 70-80DEG C, conducting stirring for 3-7h, conducting evaporation and drying, and then grinding the mixture into 50-70mesh powder, thus obtaining the unsaturated lignocellulose material.

Description

technical field [0001] A method for preparing unsaturated lignocellulosic materials used in polyurethane shape memory materials. Background technique [0002] Shape memory polymer (SMP) is a new class of functional polymer materials, which are endowed with a certain shape (initial state) under certain conditions. Fixed (transformation), if the external environment changes again in a specific way and regularity, they will reversibly return to the initial state, so far, complete the cycle of "memory initial state-fixed deformation-restore initial state". As a class of smart materials, shape memory polymers play an important role in biomaterials, and have a wide range of applications in surgical sutures, stents, heart valves, tissue engineering, drug release, orthopedics, and optical therapy. Biocompatibility Better polyurethane materials smart materials have a wide range of potential applications in the field of biomaterials. [0003] Traditional polyurethane shape memory ma...

Claims

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Application Information

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IPC IPC(8): C08H8/00C08G18/67
CPCC08G18/6705C08G2280/00C08H8/00
Inventor 蔡兰花王芳李培则
Owner 东阳市前途工业设计有限公司
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