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A photosensitive resin preparation, shaping and driving method for 4D printing

A photosensitive resin, 4D technology, used in manufacturing tools, additive manufacturing, manufacturing auxiliary devices, etc., can solve problems such as low curing rate, and achieve improved processing efficiency, short design and manufacturing cycle, excellent shape fixation rate and shape recovery rate. Effect

Active Publication Date: 2021-03-26
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the photosensitive resin of the epoxy resin system is a cationic curing system, and its curing rate is lower than that of the free radical curing system

Method used

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  • A photosensitive resin preparation, shaping and driving method for 4D printing
  • A photosensitive resin preparation, shaping and driving method for 4D printing
  • A photosensitive resin preparation, shaping and driving method for 4D printing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] (1) Select 90g of tert-butyl acrylate as the monomer of photosensitive resin, 10g of 1,6-hexanediol diacrylate as the crosslinking agent of photosensitive resin, bis(2,4,6-trimethylbenzoyl) 1 g of phosphine oxide was used as photoinitiator. The three were mixed together and subjected to ultrasonic treatment for 10 min until a colorless and transparent liquid was formed.

[0062] (2) Slowly pour the configured photosensitive resin into the resin tank of the photocuring equipment, and import the three-dimensional CAD model into the DLP equipment, that is, a ring with a gap, such as image 3 As shown, make it into shape, the forming parameters are set to 20 μm for each curing layer, and the curing time for each layer is 5s. After forming, soak the formed part with alcohol for 5 minutes, so as to clean the residual resin on the surface of the formed part;

[0063] (3) Post-processing of the formed part: the formed part is further exposed to light for 20 minutes in an ultra...

Embodiment 2

[0066] (1) Choose 80g of isobornyl acrylate as the monomer of photosensitive resin, 20g of 1,6-hexanediol dimethacrylate as the crosslinking agent of photosensitive resin, bis(2,4,6-trimethylbenzene Formyl) phenyl phosphine oxide 1g was used as photoinitiator. The three were mixed together and subjected to ultrasonic treatment for 10 minutes until a colorless and transparent liquid was formed to obtain a photosensitive resin.

[0067] (2) Slowly pour the configured photosensitive resin into the resin tank of the photocuring equipment, and import the 3D CAD model into the DLP equipment to form it. The forming parameters are set to 50 μm for each curing layer, and the curing time for each layer is 8s. After forming, soak the formed part with alcohol for 5 minutes, so as to clean off the residual photosensitive resin on the surface of the formed part;

[0068] (3) Post-processing of the formed part: the formed part is further exposed to light for 20 minutes in an ultraviolet cur...

Embodiment 3

[0071] (1) Select 70g of β-hydroxyethyl acrylate as the monomer of photosensitive resin, 30g of polyethylene glycol dimethacrylate as the crosslinking agent of photosensitive resin, 1g of α, α-diethoxyacetophenone as photoinitiator. The three were mixed together and subjected to ultrasonic treatment for 10 min until a colorless and transparent liquid was formed.

[0072] (2) Slowly pour the prepared photosensitive resin into the resin tank of the photocuring equipment, and import the 3D CAD model into the DLP equipment to form it. The forming parameters are set to 100 μm for each curing layer, and the curing time for each layer is 8s. After forming, soak the formed part with alcohol for 5 minutes, so as to clean off the residual photosensitive resin on the surface of the formed part;

[0073] (3) Post-processing of the formed part: the formed part is further exposed to light for 18 minutes in an ultraviolet curing light box to cure the uncured photosensitive resin inside the ...

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Abstract

The invention belongs to the field of polymer 4D printing and discloses preparation, formation and drive methods of photosensitive resin for 4D printing. The preparation method comprises steps as follows: S11, a polyfunctional acrylate cross-linking agent is added to single-functional acrylate monomers firstly, then a photoinitiator is added, and a mixture is obtained; S12, the mixture is subjected to ultrasonic treatment until a colorless and transparent liquid is formed, and the photosensitive resin for SLA (stereolighography apparatus) or DLP (Digital light processing) technological printing is obtained. The invention further provides the corresponding formation and drive methods of the photosensitive resin. With the adoption of a free radical type photosensitive resin system, the photocuring rate is increased, the photosensitive resin prepared by adoption of the acrylate system with single functionality and polyfunctionality is suitable for SLA or DLP technological formation, a formed part contains a hard segment and a soft segment in SMP (shape memory polymer) and shows good shape memory performance, and a formed thermosetting network has excellent heat performance and mechanical performance.

Description

technical field [0001] The invention belongs to the technical field of polymer 4D printing, and more specifically relates to a method for preparing, forming and driving a photosensitive resin for 4D printing. Background technique [0002] Smart material is a new type of functional material that can perceive external stimuli, judge and change its own structure and function independently, and it has sensing function, feedback function, response function and driving function. When smart materials are applied to additive manufacturing, that is, 3D printing technology, a new dimension of "time" is introduced into 3D printing, which is the so-called 4D printing technology that has just emerged. 3D printed parts of smart materials can self-change in shape, performance or function over time under external stimuli (such as temperature, light, electric field, magnetic field and humidity, etc.), which is a very subversive innovation. Manufacturing Technology. 4D printed products are ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/18C08F222/14C08F2/48C08F220/20C08F222/20B33Y70/00B33Y80/00B29C64/135B29C64/30B29C64/379B29C64/35
CPCB33Y70/00B33Y80/00B29C64/135B29C64/30B29C64/35B29C64/379C08F2/48C08F220/18C08F220/20C08F222/1006C08F220/1804C08F220/1811C08F222/102C08F222/1063
Inventor 闫春泽伍宏志蔡超陈鹏史玉升杨磊李昭青刘主峰张策
Owner HUAZHONG UNIV OF SCI & TECH
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