A preparation method and application of TPU-based microwave response 4D printing consumables

A technology of printing consumables and microwaves, applied in the direction of additive processing, etc., can solve problems such as ideas that have not been reported in the literature, and achieve excellent thermal and sensitive microwave response effects

Active Publication Date: 2021-02-09
GUILIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

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  • A preparation method and application of TPU-based microwave response 4D printing consumables

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Experimental program
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Embodiment 1

[0023] (1) Dissolve 1 mass part of carbon nanotubes in 5 mass parts of dichloromethane, seal and ultrasonically disperse for 1.5 h to prepare a dispersion.

[0024] (2) Mix the dispersion prepared in step (1) with an equal volume of ε-caprolactone monomer, seal and ultrasonically disperse for 1 hour, add the catalyst, and stir and react at 130°C for 20 hours under a nitrogen atmosphere to obtain a viscous Dichloromethane whose volume is 2 times the volume of ε-caprolactone monomer was added to dilute, filtered and washed to remove impurities, precipitated in ice n-hexane, filtered and washed to remove unreacted monomers, and black powder was obtained That is, modified carbon nanotubes.

[0025] (3) Take the TPU resin and dry it in an oven at 80°C for 4 hours to obtain the dried TPU resin for later use.

[0026] (4) Weigh raw materials according to the following mass percentages: 5% of the modified carbon nanotubes obtained in step (2), 91.5% of the dried TPU resin obtained in...

Embodiment 2

[0034] (1) Dissolve 1 mass part of nano-silicon carbide in 6 mass parts of dichloromethane, seal and ultrasonically disperse for 2 hours to obtain a dispersion.

[0035] (2) Mix the dispersion prepared in step (1) with an equal volume of ε-caprolactone monomer, seal and ultrasonically disperse for 1 hour, add the catalyst, and stir and react at 130°C for 20 hours under a nitrogen atmosphere to obtain a viscous Dichloromethane whose volume is 2 times the volume of the ε-caprolactone monomer was added to dilute the mixed solution, filtered and washed to remove impurities, precipitated in ice n-hexane, filtered and washed to remove unreacted monomers, and modified nano silicon carbide.

[0036] (3) Take the TPU resin and dry it in an oven at 80°C for 4 hours to obtain the dried TPU resin for later use.

[0037] (4) Weigh raw materials according to the following mass percentages: 8% of the modified nano-silicon carbide obtained in step (2), 89.0% of the dried TPU resin obtained i...

Embodiment 3

[0045] (1) Dissolve 1 mass part of nano-zinc oxide in 4 mass parts of dichloromethane, seal and ultrasonically disperse for 2 hours to obtain a dispersion.

[0046] (2) Mix the dispersion prepared in step (1) with an equal volume of ε-caprolactone monomer, seal and ultrasonically disperse for 1 hour, add the catalyst, and stir and react at 130°C for 20 hours under a nitrogen atmosphere to obtain a viscous Dichloromethane whose volume is 2 times the volume of the ε-caprolactone monomer was added to dilute the mixed solution, filtered and washed to remove impurities, precipitated in ice n-hexane, filtered and washed to remove unreacted monomers, and modified Nano Zinc Oxide.

[0047] (3) Take the TPU resin and dry it in an oven at 80°C for 4 hours to obtain the dried TPU resin for later use.

[0048] (4) Take the raw material according to the following mass percentages: 13% of the modified nano-zinc oxide obtained in step (2), 84.0% of the dried TPU resin obtained in step (3), ...

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Abstract

The invention discloses a preparation method and application of a TPU-based microwave response 4D printing consumable. Firstly, the filler (carbon nanotubes, nano-silicon carbide or nano-zinc oxide) is subjected to surface active reaction to prepare active functional fillers, and then the active functional fillers are introduced into the semi-crystalline TPU resin with excellent shape memory performance by melt blending method, and then TPU-based microwave-responsive 4D printing consumables were prepared by twin-screw extrusion. The TPU-based microwave-responsive 4D printing consumables are applied to FDM technology to print microwave-responsive smart structural parts. The invention prepares a TPU-based microwave-responsive 4D printing consumable through a simple method, and the prepared TPU-based microwave-responsive 4D printing consumable has sensitive microwave responsiveness, and excellent thermal, mechanical and shape memory properties. The 4D printed smart structural parts are sensitive to microwaves and have excellent mechanical properties.

Description

technical field [0001] The invention belongs to the technical field of smart materials, and in particular relates to a preparation method and application of a TPU-based microwave response 4D printing consumable. Background technique [0002] At the Entertainment and Design (TED) Conference in 2013, Tibbits from the Massachusetts Institute of Technology first proposed the concept of 4D printing (Four-dimensional Printing). The so-called 4D printing refers to one more "Dimension" than 3D printing (Three-dimensional Printing), that is, the time dimension. In other words, the physical properties and functions (structure, shape, size, etc.) of a three-dimensional object processed by 3D printing will change under specific environments and stimuli (such as electricity, light, magnetism, water, heat, and sound, etc.). ) can transform itself over time. Simply put, 4D printing is a combination of 3D printing and smart materials. The objects processed by 3D printing are static and i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L75/04C08K13/06C08K9/04C08K7/24C08K5/134C08K3/34C08K3/22B33Y70/10
CPCB33Y70/00C08K3/22C08K3/34C08K5/1345C08K9/04C08K13/06C08K2003/2296C08K2201/011C08L2201/12C08K3/041C08L75/04
Inventor 徐旭李裕琪陈硕平杨超陆绍荣韦春
Owner GUILIN UNIVERSITY OF TECHNOLOGY
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