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Liquid metal/polymer 3D printing ink and preparation method thereof

A liquid metal and 3D printing technology, applied in the field of materials, can solve problems such as uneven dispersion of liquid metal, only thin films can be prepared, and poor mechanical properties of materials

Active Publication Date: 2021-05-18
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems of easy sedimentation of liquid metal in liquid metal / polymer composite materials, uneven dispersion of liquid metal, poor mechanical properties of materials, and only thin films can be prepared, the invention provides a liquid metal / polymer 3D printing ink and its preparation method, a method of preparing liquid metal / polymer composite ink by atom transfer radical polymerization technology induced on the surface of sonochemical technology is proposed to realize the 3D printing of liquid metal / polymer composite material, so that the material has better mechanical properties, and It has the characteristics of electrical conductivity, thermal conductivity, dielectric and photothermal response

Method used

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  • Liquid metal/polymer 3D printing ink and preparation method thereof
  • Liquid metal/polymer 3D printing ink and preparation method thereof
  • Liquid metal/polymer 3D printing ink and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0039]Liquid metal (6.25g, 1mL) was mixed with tert-butyl acrylate (10mL), copper bromide (0.27mg), 2-bromo-N-(2-(((((8-hydroxyquinolin-2-yl) Methyl)amino)ethyl)-2-methylpropanamide (53mg) was uniformly mixed under the action of ultrasound in a cell disruptor (75W, 20min, in an ice bath). Ultrasound initiates polymerization, after NMR measurement of conversion rate, stop the reaction, add mass 1% initiator (phenylbis(2,4,6-trimethylbenzoyl) phosphorus oxide) and mass 3% A crosslinking agent (ethylene glycol dimethacrylate) was vibrated and mixed evenly to obtain a printing ink, and the ink was added to a 3D printer for photocuring printing.

Embodiment 2

[0041] Liquid metal (1.57g, 0.25mL) was mixed with butyl acrylate (5mL), copper bromide (0.1mg), 2-bromo-N-(2-(((((8-hydroxyquinolin-2-yl) Methyl)amino)ethyl)-2-methylpropanamide (2.66mg) was uniformly mixed under the action of ultrasound in a cell disruptor (75W, 20min, ice bath), and after 30min deoxygenation with nitrogen, placed in an ultrasonic cleaner, Turn on the ultrasound to initiate polymerization, and after the conversion rate is determined by NMR, the reaction is stopped, and a photoinitiator (phenylbis(2,4,6-trimethylbenzoyl) phosphine oxide) of 5% by mass is added to the mixed solution and a mass of 1 % cross-linking agent (ethylene glycol dimethacrylate) and shake and mix evenly to obtain printing ink, and add the ink into the 3D printer for photocuring printing.

Embodiment 3

[0043] Liquid metal (1.57g, 0.25mL) was mixed with methyl acrylate (5mL), copper bromide (0.1mg), 2-bromo-N-(2-(((((8-hydroxyquinolin-2-yl) Methyl)amino)ethyl)-2-methylpropanamide (2.66mg) was uniformly mixed under the action of ultrasound in a cell disruptor (75W, 20min, ice bath), and after 30min deoxygenation with nitrogen, placed in an ultrasonic cleaner, Turn on the ultrasound to initiate polymerization, and after the nuclear magnetic measurement conversion rate, stop the reaction, add a mass of 10% photoinitiator (phenylbis(2,4,6-trimethylbenzoyl) phosphorus oxide) and a mass of 3 % cross-linking agent (ethylene glycol dimethacrylate) and shake and mix evenly to obtain printing ink, and add the ink into the 3D printer for photocuring printing.

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Abstract

The invention discloses a preparation method of liquid metal / polymer 3D printing ink, and the method comprises the following steps of: mixing liquid metal liquid drops modified by a surface initiator, a copper catalyst and an acrylate monomer, and carrying out ice-bath ultrasonic initiated polymerization; after a set conversion rate is reached, terminating the reaction, thus obtaining a liquid metal / polymer composite material; and adding a photoinitiator and a cross-linking agent according to the proportion to obtain a mixed solution, and shaking and uniformly mixing the substances to obtain the 3D printing ink. The method has the characteristics of being adjustable in material fluorescence, adjustable in mechanical property and capable of achieving 3D printing, the defects that in a traditional liquid metal / polymer material preparation method, liquid metal sedimentation is too fast, only a thin film material can be prepared, the mechanical property of the material is poor, and the material function is single are overcome, therefore a high application value is achieved.

Description

technical field [0001] The invention belongs to the technical field of materials and relates to the preparation of liquid metal / polymer composite materials, in particular to a liquid metal / polymer 3D printing ink and a preparation method thereof. Background technique [0002] Flexible electronic materials are a class of materials with both flexibility and electronic properties, and have broad application prospects in wearable technology, soft robots, transducers and other fields. Both dielectric elastomer materials and flexible conductor materials belong to flexible electronic systems. The traditional method of research on the above-mentioned materials is mostly to introduce rigid particles into the elastomer matrix to increase the electrical properties of the material. However, due to the mismatch between the inherent rigidity of the inorganic filler and the flexibility of the elastomer matrix, it is easy to lead to internal stress concentration of the material and increase...

Claims

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Application Information

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IPC IPC(8): C09D11/52C09D11/107C09D11/03B33Y70/10
CPCC09D11/52C09D11/107C09D11/03B33Y70/10
Inventor 王振华高小宇范文如张彪陈祥刘福康
Owner NORTHWESTERN POLYTECHNICAL UNIV
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