Preparation method and use of 4D printed wire

A printing wire, 4D technology, applied in the direction of additive processing, etc., can solve the problems of easy card machine, uneven texture of 4D printing materials, unsmooth printing, etc., to achieve better compatibility, optimize fixing performance, and facilitate processing Effect

Active Publication Date: 2018-11-06
深圳康勋记忆材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Another object of the present invention is to provide a 4D printing wire and its preparation method to solve the technical problems of uneven texture of current 4D printing materials, unsmooth printing, and easy jamming of the machine

Method used

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  • Preparation method and use of 4D printed wire
  • Preparation method and use of 4D printed wire
  • Preparation method and use of 4D printed wire

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preparation example Construction

[0040] The preparation method of concrete shape memory composite resin comprises the following steps:

[0041] S01: Melt and mix polyester alcohol with diisocyanate, diol and catalyst in a protective atmosphere and anhydrous environment, and then perform curing treatment to obtain a polyurethane prepolymer.

[0042] S02: Melt and masticate the polyurethane prepolymer with polylactic acid after crushing.

[0043] Specifically, in the above step S01, a polyester alcohol with a number average molecular weight of 100,000-200,000 is used as a raw material to react with a diisocyanate to prepare a high-molecular-weight polyurethane prepolymer, which can endow the shape-memory composite resin with good crystallization properties, thereby realizing rapid cooling and Good fixing performance. At the same time, high-molecular-weight polyester alcohol is used as a raw material. After reacting with diisocyanate, the number-average molecular weight of the polyurethane prepolymer can be mor...

Embodiment 11

[0067] This embodiment provides a shape memory composite resin and a preparation method thereof. The preparation method of the shape memory composite resin comprises the following steps:

[0068] Adopt the polyhexamethylene adipate diol (PHAG) of 75g molecular weight 100,000 as main raw material, after vacuum dewatering, add hexamethylene diisocyanate (HDI) and 1 by -NCO / -OH molar ratio 1.2 , 4-butanediol (BDO), the content of HDI and BDO is controlled to be 25%; Then add 0.1g tin dilaurate catalyst, 60 ℃ melt and mix, stir rapidly; Then solidify 10 hours in 80 ℃ vacuum oven, obtain high Molecular weight polyurethane prepolymer. Then the polyurethane prepolymer prepared above is crushed-dried, and the polyurethane and polylactic acid are melt-blended-granulated at 180°C with a twin-screw extruder at a mass ratio of 7:3 to prepare a polyurethane / polylactic acid shape memory composite resin.

Embodiment 12

[0070] Using 80g of polybutylene adipate monoalcohol (PBAG) with a molecular weight of 150,000 as the main raw material, after removing water in vacuum, add toluene diisocyanate (TDI) and hexanediol (HDO) according to the -NCO / -OH molar ratio of 1.5 , the content of TDI and HDO was controlled at 20%; then 0.1g of tin dilaurate catalyst was added, melted and mixed at 50°C, and stirred rapidly; then cured in a vacuum oven at 100°C for 18 hours to obtain a high molecular weight polyurethane prepolymer. Then the polyurethane prepolymer prepared above is crushed-dried, and the polyurethane and polylactic acid are melt-blended-granulated at 190°C with a twin-screw extruder at a mass ratio of 6:4 to prepare a polyurethane / polylactic acid composite resin.

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Abstract

The invention discloses a preparation method and use of a 4D printed wire based on a high molecular weight polyester alcohol/polylactic acid composite resin. The preparation method comprises 1) preparing a polyurethane prepolymer from high molecular weight polyester alcohol and an excess of diisocyanate, 2) preparing a memory composite resin from the polyurethane prepolymer and polylactic acid asraw materials through melting plastication, and 3) preparing a 4D printed wire from the memory composite resin through an improved 3D printing method. The 4D printed wire has thermally sensitive shapememory effects. After pretreatment, under the action of external heat stimulation, the printed 3D patterns can automatically deform along with temperatures. The 4D printed wire has broad applicationprospects in the fields of aerospace, medical treatment, smart toys and complex devices.

Description

technical field [0001] The invention relates to the technical field of 4D printing, in particular to a shape-memory composite resin and a preparation method thereof, a 4D printing wire and a preparation method thereof. Background technique [0002] 4D printing, inherited from 3D printing, is expected to change our lives in the near future, and has important application prospects in aerospace, military equipment, smart wear, smart medical and other fields. 4D printing is a time dimension added to 3D printing, and it is a technology for programmable materials to realize self-construction and reassembly. That is, in the 3D printing process, smart materials are embedded in preset positions. After the printing is completed, the product is placed in a specific environment, and the smart material undergoes physical or chemical changes under the action of the external environment, resulting in changes in the shape and strength of the product, and finally folded into a corresponding...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/06C08L67/04C08L71/02C08K5/05C08G18/42C08G18/73C08G18/32C08G18/66C08G18/76C08J7/12B33Y70/00
CPCC08G18/3206C08G18/4238C08G18/664C08G18/73C08G18/7614C08G18/7671C08J7/123C08L75/06B33Y70/00C08J2375/06C08J2471/02C08J2467/04C08L67/04C08L71/02C08K5/05
Inventor 陈少军周迪卓海涛程兵
Owner 深圳康勋记忆材料有限公司
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