Hydrogel-elastomer composite 3D printing method

A 3D printing and hydrogel technology, applied in the field of composite material manufacturing, can solve the problems of complex steps, unsystematic research, urgent needs, etc., and achieve the effect of simple and effective mechanism and good adhesion

Inactive Publication Date: 2019-06-14
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The printing of the above composite flexible materials requires the preparation of the elastomer first, and the surface treatment of the elastomer, the steps are more complicated
And the elastomer can only be prepared as a plane, and the printed composite structure does not have a complex three-dimensional structure, but is more inclined to a two-dimensional structure
And the bonding performance between the two materials is not emphasized in the former, and the latter is not systematically studied
Therefore, the composite material 3D printing of true hydrophilic and hydrophobic (here hydrogel and elastomer) has not been realized, and the demand is urgent

Method used

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  • Hydrogel-elastomer composite 3D printing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] In terms of hydrogel, first use deionized water to configure AAm (acrylamide) solution with a concentration of 1-4M, add the initiator α-ketoglutarate with a concentration of 0.5M% (minimum 0.1M%, maximum 1M%), add The concentration of the cross-linking agent MBAA is 0.8M% (minimum 0.5M% maximum 1M%), placed on a magnetic stirrer and stirred until all the reagents are dissolved. Add nanoclay (Laponite XLG) mass fraction 5wt% (minimum 4wt%, maximum 8wt%), continue to stir until L nanoclay dissolves, and the liquid viscosity increases.

[0036] For elastomers, use Ecoflex, add benzophenone to A solution and stir evenly, heat at 60°C for 30 minutes. Remove and stir again until cool. Add solution B and add 5wt% (minimum 4wt%, maximum 8wt%) of nano-silica 15nm (10-50nm can be used according to actual needs) with a total mass of 5wt%, and use a mixer to stir all elastomer-containing materials evenly. The Ecoflex was extruded and printed, and pre-cured at room temperature fo...

Embodiment 2

[0038]In terms of hydrogel, first use deionized water to prepare NiPAM (N-isopropylacrylamide) solution at a concentration of 0.5M to a saturated solution, add the initiator α-ketoglutarate at a concentration of 0.1%-1M%, add the initiator The concentration of agent α-ketoglutaric acid is 0.5M% (minimum 0.1M%, maximum 1M%), the concentration of cross-linking agent MBAA is 0.8M% (minimum 0.5M%, maximum 1M%), placed on a magnetic stirrer and stirred until All reagents dissolved. Add nanoclay (Laponite XLG) mass fraction 5wt% (minimum 4wt%, maximum 8wt%), continue to stir until L nanoclay dissolves, and the liquid viscosity increases.

[0039] For elastomers, use Ecoflex, add benzophenone to A solution and stir evenly, heat at 60°C for 30 minutes. Remove and stir again until cool. Add solution B and add 5wt (minimum 4wt%, maximum 8wt%) of nano-silica 15nm with a total mass of 15nm, and use a stirrer to stir all the elastomer-containing materials evenly. The Ecoflex was extrude...

Embodiment 3

[0041] In terms of hydrogel, PNaAMPS (sodium poly(2-acrylamide-2-methylpropane sulfonate)) was prepared first. The specific steps are as follows: use deionized water to configure NaAMPS solution with a concentration of 2M, add an initiator α-ketoglutarate with a concentration of 0.5M% (minimum 0.1M%, maximum 1M%), and add a crosslinking agent MBAA with a concentration of 1M%. (minimum 0.5M% maximum 2M%), placed on a magnetic stirrer and stirred until all the reagents were dissolved, placed under an argon ambient UV lamp for cross-linking for 8 hours, taken out, mashed and freeze-dried completely. Use a planetary ball mill to grind the dried block to a particle size of about 10 μm. Use deionized water to prepare an AAm (acrylamide) solution with a concentration of 4M, add the initiator α-ketoglutarate at a concentration of 0.5M%, and add The concentration of the joint agent MBAA is 0.8M%, placed on a magnetic stirrer and stirred until all the reagents are dissolved. Add nanocl...

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Abstract

The invention discloses a hydrogel-elastomer composite 3D printing method. In the aspect of a hydrogel, deionized water is firstly used for preparing a solution, an initiator and a cross-linking agentare added, the solution is placed on a magnetic stirring machine to be stirred until all reagents are dissolved, nano clay is added and dissolved through stirring, the liquid viscosity is increased,and a hydrogel is obtained; in the aspect of an elastomer, Ecoflex is used, benzophenone is doped into a molten elastomer or an elastomer pre-polymerization solution, the benzophenone is uniformly dispersed into the elastomer in a heating and stirring manner, and an elastomer is obtained; extruding, printing and forming are carried out on the obtained hydrogel and elastomer, pre-curing is carriedout at room temperature for 2 hours, and extruding, printing and forming are carried out on a hydrogel prepolymer. The 3D printing of a composite material of the hydrogel material and the elastomer isachieved, the two materials are well bonded, the composite 3D printing method is suitable for printing or bonding of most of elastomer and hydrogel composite materials, and the application of composite material 3D printing and the application of a hydrogel in the aspects of flexible electronics, biological materials, wearable equipment and the like are expanded.

Description

technical field [0001] The invention relates to the technical field of composite material manufacturing, in particular to a hydrogel-elastomer composite 3D printing method. Background technique [0002] Hydrogel is composed of its hydrophilic polymer network and a large amount of water. It is widely used in biomedicine, tissue engineering, flexible devices, soft machines, etc. On the other hand, hydrophilic-hydrophobic composite structures also exist in large quantities in nature, such as stomach, nerve, cell membrane, animal skin, plant outer skin, etc. The animal stomach is composed of hydrophobic and hydrophilic four-layer structure, which realizes the function of nutrient absorption. The hydrophilic and hydrophobic structures of nerve cells realize the function of nerve signal transmission. For animals and plants, the hydrophobic outer skin reduces the evaporation of water in the body and maintains the water level in the body. The skin of some animals, such as sharks...

Claims

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Application Information

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IPC IPC(8): C08L67/00C08L33/26C08K3/34C08K3/36C08J3/24C08J3/28B29C35/08B33Y70/00
Inventor锁志刚杨航唐敬达李成海
OwnerXI AN JIAOTONG UNIV