High-strength cellulose/polyvinyl alcohol compound hydrogel, and preparation and application thereof

A technology of composite hydrogel and polyvinyl alcohol, which is applied in the field of hydrogel and its preparation and application, can solve the problems such as no reports of homogeneous cellulose and polyvinyl alcohol blended hydrogel, and achieve excellent mechanical properties, Good biocompatibility and environment-friendly effect

Inactive Publication Date: 2017-06-13
DONGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] For the research of cellulose and polyvinyl alcohol composite hydrogel, it is mainly focused on polyvinyl alcohol and cellulose, microcrystalline cellulose, nano-cellulose heterogeneous blending modification reinforcement, for homogeneous cellulose and polyvinyl alcohol The preparation of blended hydrogels has not been reported

Method used

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  • High-strength cellulose/polyvinyl alcohol compound hydrogel, and preparation and application thereof
  • High-strength cellulose/polyvinyl alcohol compound hydrogel, and preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Put 3g cellulose, polymerization degree 550, 50g 1-butyl-3-methylimidazole acetate, and 3g polyvinyl alcohol 1750, 50g 1-butyl-3-methylimidazole acetate into jacket oil In a reaction vessel with a stirrer in a bath heating device, and vacuumize, then heat while stirring, raise the temperature to 90-95°C, and keep the temperature until the cellulose and polyvinyl alcohol are completely dissolved;

[0030] Mix the above 20g cellulose solution and 20g polyvinyl alcohol solution, and stir for 180min; then inject the resulting mixed solution into a specific sealed combination mold, and pre-gel at -20°C for 24 hours; The glue is immersed in water at 5°C, the solvent is replaced, and the solvent is soaked and rinsed repeatedly to ensure that the solvent is completely precipitated to obtain a cellulose / polyvinyl alcohol composite hydrogel film.

[0031] The prepared hydrogel film was further cross-linked and crystallized at -20°C, and the final prepared hydrogel film was cut in...

Embodiment 2

[0033] Put 2g cellulose, polymerization degree 550, 50g 1-butyl-3-methylimidazole acetate, and 2g polyvinyl alcohol 1750, 50g 1-butyl-3-methylimidazole acetate respectively into the jacket oil In a reaction vessel with a stirrer in a bath heating device, and vacuumize, then heat while stirring, raise the temperature to 90-95°C, and keep the temperature until the cellulose and polyvinyl alcohol are completely dissolved;

[0034] Mix the above 20g cellulose solution and 20g polyvinyl alcohol solution, and stir for 180min; then inject the resulting mixed solution into a specific sealed combination mold, and pre-gel at 5°C for 24 hours; the pre-gelled gel Immerse in water at 5°C, replace the solvent, and repeatedly soak and rinse to ensure that the solvent is completely precipitated to prepare a cellulose / polyvinyl alcohol composite hydrogel film.

[0035] The prepared hydrogel film was further cross-linked and crystallized at -5°C, and the final prepared hydrogel film was cut int...

Embodiment 3

[0037] Put 3g cellulose, polymerization degree 1100, 50g 1-butyl-3-methylimidazole acetate, and 3g polyvinyl alcohol 1750, 50g 1-butyl-3-methylimidazole acetate respectively into the jacket oil In a reaction vessel with a stirrer in a bath heating device, and vacuumize, then heat while stirring, raise the temperature to 90-95°C, and keep the temperature until the cellulose and polyvinyl alcohol are completely dissolved;

[0038] Mix the above 20g cellulose solution and 20g polyvinyl alcohol solution, and stir for 180min; then inject the resulting mixed solution into a specific sealed combination mold, and pre-gel at -20°C for 24 hours; The glue is immersed in water at 5°C, the solvent is replaced, and the solvent is soaked and rinsed repeatedly to ensure that the solvent is completely precipitated to obtain a cellulose / polyvinyl alcohol composite hydrogel film.

[0039] The prepared hydrogel film was further cross-linked and crystallized at -20°C, and the final prepared hydrog...

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Abstract

The invention relates to a high-strength cellulose / polyvinyl alcohol compound hydrogel, and preparation and application thereof. The high-strength cellulose / polyvinyl alcohol compound hydrogel is characterized by comprising the following components in parts by weight: 1-10 parts of cellulose, 1-10 parts of polyvinyl alcohol and 99-80 parts of water. The preparation method comprises the following steps: uniformly mixing a cellulose solution and a polyvinyl alcohol solution; adding into an assembling mold, and performing pre-gelation to obtain a pre-gelated gel; and then substituting out solvent, crystallizing, and crosslinking. The compound hydrogel film prepared by the invention has excellent mechanical property, high in-water or wet stability and high light transmittance. The compound hydrogel has the advantages of accessible raw materials, simple process, high strength, favorable biocompatibility, biodegradability and the like.

Description

technical field [0001] The invention belongs to the field of hydrogel and its preparation and application, in particular to a high-strength cellulose / polyvinyl alcohol composite hydrogel and its preparation and application. Background technique [0002] PVA (polyvinyl alcohol) is a synthetic water-soluble polymer. Polyvinyl alcohol (PVA)-based hydrogel is characterized by its good biocompatibility, stability, porous structure, low coefficient of friction and water content similar to human tissue. It is an ideal tissue replacement and repair material. For example, it can be used as a drug carrier, a substitute for cartilage and skin, wound dressing, cell culture scaffold, etc. However, the low mechanical properties of PVA hydrogels make PVA hydrogels unable to meet the requirements of tissue substitutes with high mechanical properties. Therefore, while maintaining the original properties of PVA-based hydrogels, improving their mechanical properties is the main direction of c...

Claims

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Application Information

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IPC IPC(8): C08L1/02C08L29/04C08J3/075C08J3/24
CPCC08L1/02C08J3/246C08J5/18C08J2301/02C08J2329/04C08J2401/02C08J2429/04C08L29/04C08L2201/06C08L2201/10C08L2203/16
Inventor 彭华峰汪少朋徐洪耀郝兴武
Owner DONGHUA UNIV
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