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Method for preparing temperature driven programmable 4D printing intelligent material

A smart material, 4D technology, applied in the direction of liquid material additive processing, processing and manufacturing, additive processing, etc., can solve the problems of weakening the mechanical strength of deformed materials, reducing deformation ability, and reducing production efficiency, etc., to achieve high bonding strength , low production cost, high mechanical strength

Inactive Publication Date: 2018-09-04
JILIN UNIV
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the above solutions have achieved certain results, there are still deficiencies, which are mainly reflected in: simply improving the cross-linking method can improve the mechanical strength of the 4D intelligent temperature-sensitive hydrogel to a certain extent, but the deformation ability has appeared. Reduction of response; improvement of curing mechanism, although the curing rate of 4D intelligent temperature-sensitive hydrogel is improved, but anisotropic deformable structure cannot be prepared at one time
If you want to realize the deformable structure, you can only carry out subsequent processing after the hydrogel is solidified and formed, which increases the preparation cost and reduces the preparation efficiency; by selecting a double-layer structure composed of materials with different responses to the temperature field, although the deformable structure can be realized Anisotropy, but the lower bonding strength between different materials weakens the overall mechanical strength of the deformed material and becomes a key factor limiting the service life of the material

Method used

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  • Method for preparing temperature driven programmable 4D printing intelligent material
  • Method for preparing temperature driven programmable 4D printing intelligent material
  • Method for preparing temperature driven programmable 4D printing intelligent material

Examples

Experimental program
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Effect test

Embodiment 1

[0024] Preparation of temperature-driven programmable 4D printing smart materials with nano-wood pulp cellulose content of 5 mg / mL:

[0025] Choose N-isopropylacrylamide as monomer, XLG type synthetic magnesium lithium silicate as crosslinking agent, potassium persulfate as initiator, N,N,N',N'-tetramethylethylenediamine as catalyst, Nano-wood pulp cellulose is used as a reinforcing phase, monomer, initiator, and the molar ratio between the catalyst is 100:0.370:0.638, the concentration of nano-wood pulp cellulose is 0 mg / mL and 5 mg / mL, and the mass fraction of crosslinking agent is 3wt.%~3.5wt.%, stir the nano-wood pulp cellulose for 30-40 minutes under ice-water bath conditions, then ultrasonically treat for 10-15 minutes, then add XLG type synthetic magnesium lithium silicate, stir for 60-65 minutes, Then add N-isopropylacrylamide and stir for 120-130 minutes, and finally add potassium persulfate and N,N,N',N'-tetramethylethylenediamine in turn, stir for 5-6 minutes, and t...

Embodiment 2

[0027] Preparation of temperature-driven programmable 4D printing smart materials with nano-wood pulp cellulose content of 4mg / mL:

[0028]Choose N-isopropylacrylamide as monomer, XLG type synthetic magnesium lithium silicate as crosslinking agent, potassium persulfate as initiator, N,N,N',N'-tetramethylethylenediamine as catalyst, Nano-wood pulp cellulose is used as a reinforcing phase, monomer, initiator, and the molar ratio between the catalyst is 100:0.370:0.638, the concentration of nano-wood pulp cellulose is 0 mg / mL and 4 mg / mL, and the mass fraction of crosslinking agent is 3wt.%~3.5wt.%, stir the nano-wood pulp cellulose for 30-40 minutes under ice-water bath conditions, then ultrasonically treat for 10-15 minutes, then add XLG type synthetic magnesium lithium silicate, stir for 60-65 minutes, Then add N-isopropylacrylamide and stir for 120-130 minutes, and finally add potassium persulfate and N,N,N',N'-tetramethylethylenediamine in turn, stir for 5-6 minutes, and the...

Embodiment 3

[0030] Preparation of temperature-driven programmable 4D printing smart materials with nano-wood pulp cellulose content of 3 mg / mL:

[0031] Choose N-isopropylacrylamide as monomer, XLG type synthetic magnesium lithium silicate as crosslinking agent, potassium persulfate as initiator, N,N,N',N'-tetramethylethylenediamine as catalyst, Nano-wood pulp cellulose is used as a reinforcing phase, monomer, initiator, and the molar ratio between the catalyst is 100:0.370:0.638, the concentration of nano-wood pulp cellulose is 0 mg / mL and 3 mg / mL, and the mass fraction of crosslinking agent is 3wt.%~3.5wt.%, stir the nano-wood pulp cellulose for 30-40 minutes under ice-water bath conditions, then ultrasonically treat for 10-15 minutes, then add XLG type synthetic magnesium lithium silicate, stir for 60-65 minutes, Then add N-isopropylacrylamide and stir for 120-130 minutes, and finally add potassium persulfate and N,N,N',N'-tetramethylethylenediamine in turn, stir for 5-6 minutes, and t...

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Abstract

The invention discloses a method for preparing a temperature driven programmable 4D printing intelligent material. According to the method, on the basis of high efficiency of mold shaping, N-isopropylacrylamide type temperature intelligent hydrogel is adopted as a main body material, and a temperature driven 4D printing intelligent deformation material which has temperature response anisotropismin a spatial dimension is prepared through 'one-step method' in-situ free radical polymerization. In addition to high interface bonding strength, the temperature driven programmable 4D printing intelligent deformation material prepared by using the method has the characteristics of programmability, high response speeds, high mechanical strength, high deformation complexity and high practicability,in addition is low in production cost, convenient to process and manufacture and wide in application range, and is capable of providing a feasible and effective novel method for solving practical application problems of temperature driven programmable 4D printing intelligent deformation materials.

Description

technical field [0001] The invention relates to the technical field of 4D printing, in particular to a method for preparing a temperature-driven programmable 4D printing smart material. Background technique [0002] 4D printing, as a material processing technology developed based on intelligent sensing materials, provides a new idea to break through the limitations of traditional deformable materials. Hydrogel, as a representative flexible functional material in 4D printing technology, has been widely used in recent years. Research and development of flexible smart devices. Hydrogels can absorb or lose water by switching the hydrophilicity and hydrophobicity of the internal pore network under the stimulation of external conditions such as temperature field, chemical field, magnetic field, and electric field, resulting in volume changes, thereby realizing intelligent perception and deformation. Among many stimulation conditions, temperature-driven programmable 4D printing sm...

Claims

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Application Information

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IPC IPC(8): C08J3/24C08L33/24C08L97/02C08K3/34C08F120/54B29C64/106B29C64/393B33Y10/00B33Y50/02
CPCC08J3/246B29C64/106B29C64/393B33Y10/00B33Y50/02C08F120/54C08J2333/24C08J2497/02C08K3/34
Inventor 梁云虹赵骞侯文华张志辉韩志武任露泉
Owner JILIN UNIV
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