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Performance regulation and forming method applicable to double-network intelligent hydrogel and product thereof

A hydrogel and dual-network technology, which is applied in the field of performance regulation and forming of dual-network intelligent hydrogels, can solve problems such as difficult forming, complex internal structure, and inability to achieve simple process, increase application range, and improve mechanical properties Effect

Inactive Publication Date: 2019-08-02
HUAZHONG UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the above defects or improvement needs of the prior art, the present invention provides a performance regulation and forming method and product suitable for dual-network smart hydrogels, which are based on the forming characteristics of existing polymer hydrogel devices, in order to To overcome the problem that polymer hydrogels cannot or are difficult to form parts with complex internal structures or external contours, research and design a performance regulation and forming method suitable for dual-network smart hydrogels with better precision

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  • Performance regulation and forming method applicable to double-network intelligent hydrogel and product thereof

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Embodiment 1

[0038] Embodiment 1 of the present invention provides a performance regulation and forming method suitable for dual-network smart hydrogels, the method comprising the following steps:

[0039] (1) Synthesis of polyethylene glycol diacrylate: 10 g of PEG powder was added into 100 ml of dichloromethane for dissolution, and then 2.02 g of triethylamine and 1.81 g of acryloyl chloride were added successively at room temperature. Then, the resulting mixture was stirred for 12 hours in an ice-water bath. Next, the triethylamine salt formed during the reaction was removed by filtration, the obtained polyethylene glycol diacrylate was added to 1 liter of diethyl ether cooled to 4°C, and the purification was repeated 4 times under the condition of isolation of air. process. Finally, the collected polyethylene glycol diacrylate was dried in a vacuum oven at 35°C for 20 hours.

[0040] (2) Synthesis of PVA-CNTs mixture: 30 g of PVA powder was added to 300 ml of distilled water at a tem...

Embodiment 2

[0045] The performance control and forming method suitable for dual-network smart hydrogel provided by Embodiment 2 of the present invention includes the following steps:

[0046] (1) Synthesis of polyethylene glycol diacrylate: 10 grams of PEG powder was added to 130 milliliters of dichloromethane for dissolution, and then 2.5 grams of triethylamine and 2 grams of acryloyl chloride were added successively at room temperature. Then, the resulting mixture was stirred for 9 hours in an ice-water bath. Next, the triethylamine salt formed during the reaction was removed by filtration, the obtained polyethylene glycol diacrylate was added to 1 liter of diethyl ether cooled to 2°C, and the purification was repeated 3 times in the absence of air. process. Finally, the collected polyethylene glycol diacrylate was dried in a vacuum oven at 35°C for 24 hours.

[0047] (2) Synthesis of PVA-CNTs mixture: 10 g of PVA powder was added to 300 ml of distilled water at a temperature of 90° C...

Embodiment 3

[0052] The performance control and forming method suitable for dual-network smart hydrogel provided by Embodiment 3 of the present invention includes the following steps:

[0053] (1) Synthesis of polyethylene glycol diacrylate: 10 grams of PEG powder was added to 135 milliliters of dichloromethane for dissolution, and then 3 grams of triethylamine and 2.2 grams of acryloyl chloride were added successively at room temperature. Then, the resulting mixture was stirred for 6 hours in an ice-water bath. Next, the triethylamine salt formed during the reaction was removed by filtration, and the obtained polyethylene glycol diacrylate was added to 1 liter of diethyl ether cooled to 2° C., and the purification was repeated twice in the absence of air. process. Finally, the collected polyethylene glycol diacrylate was dried in a vacuum oven at 35°C for 24 hours.

[0054] (2) Synthesis of PVA-CNTs mixture: 60 g of PVA powder was added to 300 ml of distilled water at a temperature of 9...

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Abstract

The invention belongs to the technical field of intelligent manufacturing, and discloses a performance regulation and forming method suitable for double-network intelligent hydrogel and a product thereof. The method comprises the following steps: (1) preparing a polyvinyl alcohol solution, and uniformly mixing carbon nanotubes into the polyvinyl alcohol solution; (2) first, simultaneously adding,in a constant temperature environment, polyethylene glycol diacrylate and ammonium persulfate into the mixed solution obtained in the step (1) to obtain a new mixed solution, and then, sequentially performing stirring and freeze thawing on the new mixed solution to obtain a double-network hydrogel, wherein a polyethylene glycol chemical crosslinking network and a physical crosslinking network areformed in the double-network hydrogel; and (3) taking the double-network hydrogel as a raw material, printing and forming a to-be-formed part according to a three-dimensional model of the to-be-formedpart by adopting a 3D printing device. The hydrogel provided by the invention not only has a controllable shape and good surface quality, but also has a good response degree, as well as good mechanical properties and electrical conductivity.

Description

technical field [0001] The invention belongs to the technical field related to intelligent manufacturing, and more specifically relates to a performance regulation and forming method and a product suitable for dual-network intelligent hydrogels. Background technique [0002] With the development of science and technology, the performance and grade of materials are gradually improving. In the past, materials only needed to meet certain specific service conditions, and later developed into functional materials and smart materials that are now more and more widely used. Smart materials require that materials integrate perception, drive and information processing to form materials with intelligent properties similar to biological materials, that is, they can perceive changes in the external environment and then judge, process and respond, thereby changing their own shape or performance. External stimuli include force, heat, humidity, light, electricity, magnetism, radiation, e...

Claims

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Application Information

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IPC IPC(8): C08J3/075C08J3/24C08L29/04C08L71/02C08K3/04
CPCC08J3/075C08J3/24C08J2329/04C08J2471/02C08K3/041C08K2201/001C08K2201/011
Inventor 宋波汤桂平史玉升
Owner HUAZHONG UNIV OF SCI & TECH
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