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A 4D printing photosensitive resin based on dynamic covalent bond and its preparation method

A dynamic covalent bond and photosensitive resin technology, applied in the direction of additive processing, etc., can solve the problems of non-recyclable, low mechanical properties, environmental pollution, etc., achieve 100% atom utilization, excellent mechanical properties, simple and fast preparation process Effect

Active Publication Date: 2022-04-05
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the technical problems that the cured photosensitive resin used in the current photocuring 3D printing cannot be recycled, cannot be reshaped, has low mechanical properties, and causes great pollution to the environment. Preparation method of 4D printing photosensitive resin based on dynamic covalent bond

Method used

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  • A 4D printing photosensitive resin based on dynamic covalent bond and its preparation method
  • A 4D printing photosensitive resin based on dynamic covalent bond and its preparation method
  • A 4D printing photosensitive resin based on dynamic covalent bond and its preparation method

Examples

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Effect test

Embodiment 1

[0038] In this example, the 4D printing photosensitive resin is a mixture of a reaction product of a dihydric mercaptan and a (meth)acrylate monomer containing an isocyanate group and a photoinitiator, specifically 3,6-dioxa-1,8-octyl Alkedithiol is a dibasic mercaptan, using isocyanoethyl methacrylate as a (meth)acrylate containing isocyanate groups, using N,N-diisopropylethylamine as a catalyst, and using phenyl bis( 2,4,6-Trimethylbenzoyl)phosphine oxide as photoinitiator.

[0039] In this embodiment, a method for preparing a 4D printing photosensitive resin based on a dynamic covalent bond, the specific steps are as follows:

[0040] Add 16g of 3,6-dioxa-1,8-octanedithiol and 0.04g of N,N-diisopropylethylamine to a flask equipped with a shading and stirring bar, mix well, and place on ice Slowly add 28 g of isocyanoethyl methacrylate into the water bath, and react at room temperature for 3 hours. After the reaction, add 0.4g of phenylbis(2,4,6-trimethylbenzoyl)phosphine ox...

Embodiment 2

[0042] In this example, the 4D printing photosensitive resin is a mixture of a reaction product of a dihydric mercaptan and a (meth)acrylate monomer containing an isocyanate group and a photoinitiator, specifically 3,6-dioxa-1,8-octyl Alkanedithiol is a dihydric mercaptan, with isocyanate ethyl acrylate as (meth)acrylate containing isocyanate groups, triethylamine as a catalyst, and phenyl bis(2,4,6-trimethylbenzyl Acyl)phosphine oxides are examples of photoinitiators.

[0043] In this embodiment, a method for preparing a 4D printing photosensitive resin based on a dynamic covalent bond, the specific steps are as follows:

[0044] Add 16g of 3,6-dioxa-1,8-octanedithiol and 0.04g of triethylamine into a darkened flask equipped with a stirring bar. After mixing evenly, slowly add 25g of isocyanate in an ice-water bath Ethyl acrylate, react at room temperature for 1 hour. After the reaction, 0.4g of 2,4,6-trimethylbenzoyldiphenylphosphine oxide was added, and stirred evenly to ...

Embodiment 3

[0046] In this example, the 4D printing photosensitive resin is a mixture of a reaction product of a dihydric thiol and a (meth)acrylate monomer containing an isocyanate group, and a photoinitiator, specifically, 1,6-hexanedithiol is used as the dihydric thiol , with isocyanoethyl methacrylate as (meth)acrylate containing isocyanate group, 1,8-diazabicycloundec-7-ene as catalyst, 1-hydroxy-cyclohexyl- Phenyl phenone is an example of a photoinitiator.

[0047] In this embodiment, a method for preparing a 4D printing photosensitive resin based on a dynamic covalent bond, the specific steps are as follows:

[0048] Add 16g of 1,6-hexanedithiol and 0.04g of 1,8-diazabicycloundec-7-ene into a light-shielded flask equipped with a stirring bar, mix well, and slowly Add 28 g of isocyanoethyl methacrylate and react at room temperature for 2 hours. After the reaction, add 0.4g of 1-hydroxy-cyclohexyl-phenyl ketone, stir evenly to obtain a remodelable and recyclable 4D printing photose...

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Abstract

The invention discloses a 4D printing photosensitive resin based on a dynamic covalent bond and a preparation method thereof. The photosensitive resin is a reaction product of a dihydric mercaptan, a (meth)acrylate monomer containing an isocyanate group, and a photoinitiator. The preparation method of the photosensitive resin comprises the following steps: After mixing a certain proportion of dihydric mercaptan, (meth)acrylate containing isocyanate group and catalyst, reacting at room temperature for 1 to 3 hours, and then adding photoinitiator , to obtain a remodelable, degradable and recyclable, high-strength 4D printing photosensitive resin. The entire synthesis process does not involve the use of solvents. The photosensitive resin of the present invention utilizes the dynamic reversibility of the thiourethane bond to achieve remodeling and degradation. Recycling , using the double bond radical polymerization in (meth)acrylate to realize photocuring 3D printing, and using the shape memory effect of the material to realize 4D printing.

Description

technical field [0001] The invention relates to the technical field of 4D printing photosensitive resin, in particular to a dynamic covalent bond-based 4D printing photosensitive resin and a preparation method thereof. Background technique [0002] 3D printing, also known as additive manufacturing, is a technology that uses the method of gradually accumulating materials to manufacture solid parts. Compared with traditional processing technologies, it can quickly and cheaply produce objects with complex and fine structures without molds. Light-curing 3D printing is a 3D printing method that uses photosensitive resin to light-cure under ultraviolet radiation to manufacture parts. The system has a simple structure and low cost, and can realize rapid prototyping of high-precision complex models. Printing technology has a wider range of product applications and development prospects. However, at present, the photosensitive resin used in photocuring 3D printing is a covalently cr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F120/38C08F2/48B33Y70/00
CPCC08F120/38C08F2/48B33Y70/00
Inventor 张彦峰崔晨晖张卓琳陈兴幸马丽钟倩云
Owner XI AN JIAOTONG UNIV
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