Multi-thermoplastic shape memory polymer 4D printing method

A memory polymer, thermoplastic technology, applied in 3D object support structure, additive manufacturing, processing data acquisition/processing, etc., can solve problems such as structural deformation recovery, achieve recovery of organ function and rehabilitation, broad application prospects, and achieve personalized customization the effect of

Active Publication Date: 2020-11-10
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the continuous deepening of SMP 4D printing research, the application of SMP in the biomedical field has achieved a series of remarkable results. Although the current SMP 4D printing research results are gratifying, there are still shortcomings, that is, SMP 4D printing is only for a single SMP Materials are used for printing research, and the printed structure can only undergo a simple deformation recovery

Method used

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  • Multi-thermoplastic shape memory polymer 4D printing method
  • Multi-thermoplastic shape memory polymer 4D printing method
  • Multi-thermoplastic shape memory polymer 4D printing method

Examples

Experimental program
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Effect test

Embodiment 1

[0062] First, two materials, MM4520 and MM5520 from SMP Technologies, Japan, were selected, and their phase transition temperatures were 45°C and 55°C respectively, and the two materials were put into a vacuum drying oven for 3 to 4 hours to obtain dried MM4520 and MM5520 particles;

[0063] see figure 1 , respectively put MM4520 and MM5520 particles into a commercial wire drawing machine, set the corresponding preheating temperature zone 1 to 160-170°C, heating temperature zone 2 to 180-190°C, die opening temperature zone 3 to 185-195°C, and the traction mechanism The speed of 5 is 20-60 r / min, the screw speed of wire-receiving mechanism 6 is 100-250 r / min, and the MM4520 and MM5520 particles are respectively preheated, heated and melted, screw extruded, drawn and cooled, and wire-retracted to obtain MM4520 and MM5520 filaments available for fused deposition printing.

[0064] see figure 2 , use 3D CAD design software to design the structure in the figure from bottom to to...

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Abstract

The invention discloses a multi-thermoplastic shape memory polymer 4D printing method. According to the multi-thermoplastic shape memory polymer 4D printing method, two or more thermoplastic shape memory polymers are adopted as a raw material, a solid structure is finally obtained through multiple steps of raw material wire drawing, target structure modeling and step-by-step fused deposition printing, initial structure modeling, programming mold manufacturing, shape programming and the like, and under the effect of the gradually-increased temperature, the solid structure can be recovered to atarget structure through step deformation. The multi-thermoplastic shape memory polymer 4D printing method can be widely applied to medical instruments such as tracheal stents and esophageal stents, gradually expands tissues such as trachea and esophagus, recovers organ functions and helps rehabilitation, and has important practical value.

Description

technical field [0001] The invention belongs to the technical field of additive manufacturing of intelligent polymer materials, and in particular relates to a 4D printing method of multiple thermoplastic shape memory polymers. Background technique [0002] Shape memory polymer (shape memory polymer, SMP) is a stimuli-responsive material, which can change the initial shape under certain conditions and solidify into a temporary shape, and then pass specific external conditions (such as heat, electricity, light, etc.) , chemical induction, etc.) stimulation, and can return to the original shape of the polymer material. Due to SMP's light weight, low price, large deformation, adjustable phase transition temperature, diverse driving methods, and its unique shape memory effect and deformation ability, it is widely used in aerospace, biomedical, smart textiles, micro optics, electronic devices, anti-counterfeiting Instructions and other aspects have great application prospects and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C64/118B29C64/386B29C64/30B29C48/05B33Y10/00B33Y40/00B33Y50/00
CPCB33Y10/00B33Y40/00B33Y50/00B29C64/118B29C64/30B29C64/386B29C48/05
Inventor 朱子才潘亚东罗斌
Owner XI AN JIAOTONG UNIV
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