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Photocurable castor oil-based shape memory elastomer as well as preparation method and application thereof

A technology of castor oil-based and elastic body, which is applied in the field of castor oil-based shape memory elastomer and its preparation, can solve the problems of waste of energy and time, complex operation, environmental and human health hazards, etc., and achieve reduction of emissions, abundant sources, The effect of fast curing

Active Publication Date: 2022-07-12
INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In most reports, the traditional thermal curing method is complicated to operate, has strict requirements on equipment and environment, and wastes a lot of energy and time
At the same time, the large amount of organic solvent consumption in the synthesis process will cause harm to the environment and human health

Method used

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  • Photocurable castor oil-based shape memory elastomer as well as preparation method and application thereof
  • Photocurable castor oil-based shape memory elastomer as well as preparation method and application thereof
  • Photocurable castor oil-based shape memory elastomer as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] 15.54 g isophorone diisocyanate (IPDI) and 10.4 g castor oil (CO) were added to a 250 mL round bottom flask under N 2 Mechanical stirring under the atmosphere, adding dibutyltin dilaurate accounting for 0.5% to 0.6% of the total mass of the reactants, and reacting at 65 ° C for 45 min; the obtained castor oil-based polyurethane prepolymer was mixed with 4.62 g of bis(2-hydroxyethyl) ) disulfide to carry out chain extension reaction, add 13g hydroxyethyl methacrylate, add 50% bisphenol A epoxy resin E51 of the total mass of the reaction system, mix, add photoinitiator 1173 that accounts for 1% of the total mass of the reaction system and photoinitiator 6976, which accounts for 1% of the total mass of the reaction system, to perform photocuring to obtain a castor oil-based shape memory elastomer.

Embodiment 2

[0020] 15.54 g isophorone diisocyanate (IPDI) and 10.4 g castor oil (CO) were added to a 250 mL round bottom flask under N 2 Mechanical stirring under the atmosphere, adding dibutyltin dilaurate accounting for 0.5% to 0.6% of the total mass of the reactants, and reacting at 65 ° C for 45 min; the obtained castor oil-based polyurethane prepolymer was mixed with 4.62 g of bis(2-hydroxyethyl) ) disulfide to carry out chain extension reaction, add 13g hydroxyethyl methacrylate, add 50% bisphenol A epoxy resin E44 of the total mass of the reaction system, mix, add photoinitiator 1173 that accounts for 1% of the total mass of the reaction system and photoinitiator 6976, which accounts for 1% of the total mass of the reaction system, to perform photocuring to obtain a castor oil-based shape memory elastomer.

Embodiment 3

[0022] 15.54 g isophorone diisocyanate (IPDI) and 10.4 g castor oil (CO) were added to a 250 mL round bottom flask under N 2 Mechanical stirring under the atmosphere, adding dibutyltin dilaurate accounting for 0.5% to 0.6% of the total mass of the reactants, and reacting at 65 ° C for 45 min; the obtained castor oil-based polyurethane prepolymer was mixed with 4.62 g of bis(2-hydroxyethyl) ) disulfide to carry out chain extension reaction, add 13g hydroxyethyl methacrylate, add 50% bisphenol A epoxy resin E42 of the total mass of the reaction system, mix, add photoinitiator 1173 that accounts for 1% of the total mass of the reaction system and photoinitiator 6976, which accounts for 1% of the total mass of the reaction system, to perform photocuring to obtain a castor oil-based shape memory elastomer.

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Abstract

The invention discloses a photo-curable castor oil-based shape memory elastomer as well as a preparation method and application thereof. The preparation method comprises the following steps: reacting castor oil with diisocyanate to obtain a castor oil-based polyurethane prepolymer; carrying out chain extension reaction on the prepared castor oil-based polyurethane prepolymer and bis (2-ethoxyl) disulfide, adding hydroxyethyl methylacrylate for blocking, adding glycidyl methacrylate for diluting in the reaction process, finally mixing with bisphenol A epoxy resin, adding a photoinitiator, and carrying out UV photocuring, so as to obtain the epoxy resin. The castor oil-based shape memory elastomer is obtained. The disulfide dynamic bond in the castor oil-based shape memory elastomer prepared by the invention can endow the prepared polymer with excellent shape memory behavior, and the shape fixing rate and the recovery rate after four cycles are respectively kept at 98.9% and 79.0% or above. Meanwhile, the ultraviolet light curing material has the advantages in the aspects of rapid curing at room temperature, reduction of energy consumption, reduction of emission of volatile organic chemical substances, shortening of the production cycle of products and the like.

Description

technical field [0001] The invention belongs to the field of vegetable oil-based elastic polymers, in particular to a light-curable castor oil-based shape memory elastomer and a preparation method and application thereof. Background technique [0002] With the depletion of fossil resources, wild swings in oil prices and growing environmental concerns, the world is focusing on finding renewable resources to deal with the crisis. Vegetable oil is one of the typical promising renewable resources, which can be obtained in large quantities from nature with relatively low cost. Vegetable oils are triglycerides composed of glycerol and fatty acids. Fatty acids are mostly long-chain compounds containing 12-22 carbon atoms and different reactive sites (such as ester groups, hydroxyl groups, and carbon-carbon double bonds). These reactive sites can be chemically modified to introduce other functional groups. Based on these unique structures, many researchers have studied vegetable o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G81/00C08G18/36C08G18/62C08G18/10C08G18/32
CPCC08G81/00C08G18/36C08G18/10C08G18/6229C08G18/3855C08G18/62
Inventor 李守海聂圆李梅刘芮同邓天翔丁海阳许利娜姚娜杨小华张燕
Owner INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY