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A kind of gel material and preparation method thereof

A gel material and raw material technology, applied in the field of gel material and its preparation, can solve the problems of poor impact resistance, poor mechanical properties, low temperature resistance, etc., achieve excellent impact hardening performance, and the preparation method is simple and easy to expand The effect of using range

Active Publication Date: 2021-01-08
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the existing gel materials are usually brittle materials with poor mechanical properties, and the δ value of the gel is only between 2 and 20 (the δ value is the change value of softness and hardness, which is the maximum value of the elastic modulus / the minimum value of the elastic modulus The higher the δ value, it means that the material has good impact resistance and energy absorption capacity), and the impact resistance is poor. In addition, it is not resistant to low temperature, which greatly limits its application

Method used

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  • A kind of gel material and preparation method thereof
  • A kind of gel material and preparation method thereof
  • A kind of gel material and preparation method thereof

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preparation example Construction

[0089] The present invention also provides a preparation method of the gel material described in the above technical solution, comprising the following steps:

[0090] a) mixing the polysiloxane modified body with an organic solvent to obtain a modified body solution;

[0091] mixing acrylamide monomers, a crosslinking agent and water to obtain a monomer solution;

[0092] b) Mixing the modifier solution, the monomer solution and the photoinitiator, and irradiating with ultraviolet light to form a gel material.

[0093] Wherein, the type, dosage and source of the polysiloxane modified body, organic solvent, acrylamide monomer, crosslinking agent, water and photoinitiator are all consistent with those described in the above technical scheme. This will not repeat them one by one.

[0094] In the step a), the mixing method of the polysiloxane modified body and the organic solvent is preferably ultrasonic dispersion. The mixing temperature of the polysiloxane-based modified bod...

Embodiment 1

[0100] 1.1 Sample preparation

[0101] After mixing 20 parts by mass of diamino-terminated polydimethylsiloxane (molecular weight: 20,000, viscosity: 800cst) and 1.5 parts of trimethoxyboroxane evenly, stir and react at 120°C for 4 hours to obtain a prepolymer solution ; Then add 0.4 parts of isophorone diisocyanate, stir and react at 90°C for 4 hours to obtain a reaction product. After the product was dried at 120°C for 36 hours, it was extruded through a twin-screw extruder at 100°C to obtain a polysiloxane modified body.

[0102] Add 10 g of modified polysiloxane into 1 g of ethanol, ultrasonically disperse at 25° C. for 0.5 h, and place at room temperature for 2 h to obtain a modified solution. 10g of N,N-dimethylacrylamide, 0.01g of aziridine and 20g of water were uniformly mixed at 30°C, and then cooled to room temperature to obtain a monomer solution. After mixing the obtained modified body solution, monomer solution and 0.01g 1-hydroxy-cyclohexyl-phenyl ketone evenly...

Embodiment 2

[0107] 20 parts by mass of vinyl-terminated hydroxyl-terminated polydimethylsiloxane (dihydroxy-terminated polydimethylsiloxane with vinyl side groups, molecular weight 3000, viscosity 80cst) and 1.5 parts of trimethoxyboroxine After the hexacyclic rings are evenly mixed, stir and react at 120°C for 4 hours to obtain a prepolymer solution; then add 0.4 parts of isophorone diisocyanate, stir and react at 90°C for 4 hours to obtain a reaction product. After the product was dried at 120°C for 36 hours, it was extruded through a twin-screw extruder at 100°C to obtain a polysiloxane modified body.

[0108] Add 8 g of modified polysiloxane into 1 g of tetrahydrofuran, ultrasonically disperse at 35° C. for 1 hour, and then place at room temperature for 3 hours to obtain a modified solution. 12g of N-isopropylacrylamide, 0.05g of citric acid and 20g of water were uniformly mixed at 35°C, and then cooled to room temperature to obtain a monomer solution. After mixing the obtained modif...

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Abstract

The invention provides a gel material and a preparation method thereof. The gel material provided by the present invention is prepared from raw materials comprising the following components in parts by weight: 5-30 parts of acrylamide monomer, 0.01-0.08 parts of cross-linking agent, 10-30 parts of water, 0.01-0.25 parts photoinitiator, 5 to 25 parts of polysiloxane modified body and 0.2 to 5 parts of organic solvent; the polysiloxane modified body is a polymer formed by polymerization reaction of polysiloxane body ; The polysiloxane body is selected from the group consisting of diamino-terminated polydimethylsiloxane, vinyl-terminated hydroxyl-terminated polydimethylsiloxane, vinyl-terminated aminopolydimethylsiloxane, hydrogen-based One or more of hydroxyl-terminated polydimethylsiloxane, hydrogen-terminated amino-polydimethylsiloxane and vinyl-terminated hydrogen-based polydimethylsiloxane. The gel material provided by the invention has excellent mechanical properties and impact hardening properties, and endows the gel material with low-temperature non-freezing properties.

Description

technical field [0001] The invention relates to the technical field of biological materials, in particular to a gel material and a preparation method thereof. Background technique [0002] Hydrogel is a high molecular polymer that contains a large amount of water in the network structure and is insoluble in water. It is a high molecular network system, which is soft in nature, can maintain a certain shape, and can absorb a large amount of water. Hydrogel can be used as a cartilage repair material. It can be injected into small holes in bones during cartilage repair surgery, which can help bone marrow produce stem cells and grow new cartilage; hydrogel can also speed up the repair of eyeglasses and nerve damage, and it can be used as an ideal for stem cell transplantation. Medium, helps stem cells survive in the body and modifies damaged tissues. Therefore, as an important branch of biomaterials, hydrogels have attracted much attention, especially the synthesis of hydrogels,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F120/54C08F120/56C08F122/38C08F120/58C08F220/34C08F226/06C08F222/38C08F222/14C08F218/16C08F2/48C08L83/08
CPCC08F2/48C08F120/54C08F120/56C08F120/58C08F122/385C08F212/14C08F220/34C08F226/06C08L83/08C08F222/385C08F218/22C08F222/102
Inventor 徐昆谭颖邓裕坤王丕新张文德裴晓鹏翟侃侃梁学称
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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