Check patentability & draft patents in minutes with Patsnap Eureka AI!

Porous PVA/cellulose nanocrystalline hydrogel and preparation method thereof

A technology of cellulose and nanocrystals, applied in the field of materials, can solve problems such as the reduction of water content and permeability of gels, and limit the application prospects of polyvinyl alcohol hydrogels, and achieve uniform distribution, overall gel performance, and pore size. Evenly distributed effect

Active Publication Date: 2019-11-26
芜湖万隆新材料有限公司
View PDF2 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Prior art reports can adopt multiple methods to improve the performance of PVA hydrogel, such as methods such as improving the molecular weight and crystallinity of polyvinyl alcohol can be used to improve its mechanical properties, but these methods still cannot meet the needs of packaging industry and bioengineering fields. In addition, these modification methods are likely to cause problems such as lower water content and permeability of the gel, which also greatly limits the application prospects of polyvinyl alcohol hydrogel in packaging and other fields.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Porous PVA/cellulose nanocrystalline hydrogel and preparation method thereof
  • Porous PVA/cellulose nanocrystalline hydrogel and preparation method thereof
  • Porous PVA/cellulose nanocrystalline hydrogel and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0048] The invention provides a kind of preparation method of porous PVA / cellulose nanocrystalline hydrogel, comprising:

[0049] Mix PVA, porogen, polyethylene glycol containing furan ring at the end group, maleimide grafted cellulose nanocrystals and deionized water, ultrasonically disperse, and heat to react; the PVA, porogen, end group The weight ratio of furan ring-containing polyethylene glycol, maleimide-grafted cellulose nanocrystals and deionized water is (20-80): (2-50): (1-20): (1-20 ): (20~50);

[0050] Cool after the reaction, adopt the repeated freezing method, and finally soak to remove the porogen to obtain the porous PVA / cellulose nanocrystalline hydrogel.

[0051] A kind of preparation method of porous PVA / cellulose nanocrystal hydrogel of the present invention firstly PVA, porogen, terminal group containing furan ring polyethylene glycol, maleimide grafted cellulose nanocrystal and deionized water mix.

[0052] Wherein, the weight ratio of PVA, porogen, e...

Embodiment 1

[0078] Preparation of cellulose nanocrystals grafted with 6-maleimide caproic acid: take 41.72 g of cellulose nanocrystal aqueous dispersion with a solid content of 7.19%, mix 10.55 g of 6-maleimide caproic acid and 10 mL deionized water Evenly, heat to 95°C until the acid is completely dissolved, then heat up to 110°C, vacuumize to remove water, react for 6 hours, stop heating and cool to room temperature, wash repeatedly with ethanol, and centrifuge to remove ethanol to obtain;

[0079] The preparation of polyethylene glycol containing furan ring in the end group: take 9.00g polyethylene glycol dicarboxy ether (molecular weight 600), 5.75g 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride Salt, 3.67g, 4-diaminopyridine, 3.21g of 2-furan methanol and 50mL of dichloromethane were mixed evenly, stirred magnetically, reacted at room temperature for 24h, washed repeatedly with saturated saline, and obtained after rotary evaporation to remove dichloromethane.

[0080] Pr...

Embodiment 2

[0082] Preparation of cellulose nanocrystals grafted with 11-maleimide caproic acid: take 41.72 g of cellulose nanocrystal aqueous dispersion with a solid content of 7.19%, mix 21.34 g of 6-maleimide caproic acid and 10 mL deionized water Evenly, heat to 99°C until the acid is completely dissolved, then heat up to 130°C, vacuumize to remove water, react for 6 hours, stop heating and cool to room temperature, wash repeatedly with ethanol, and centrifuge to remove ethanol to obtain;

[0083] The preparation of polyethylene glycol containing furan ring in the end group: take 9.00g polyethylene glycol dicarboxy ether (molecular weight 600), 5.75g 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride Salt, 3.67g, 4-diaminopyridine, 3.21g of 2-furan methanol and 50mL of dichloromethane were mixed evenly, stirred magnetically, reacted at room temperature for 24h, washed repeatedly with saturated saline, and obtained after rotary evaporation to remove dichloromethane.

[0084] P...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Sizeaaaaaaaaaa
Average pore sizeaaaaaaaaaa
Average pore sizeaaaaaaaaaa
Login to View More

Abstract

The invention provides a porous PVA / cellulose nanocrystalline hydrogel, which comprises the following raw materials in parts by weight: 20-80 parts by weight of PVA, 2-50 parts by weight of porogen, 1-20 parts by weight of furan ring-terminated polyethylene glycol, 1-20 parts by weight of maleimide group grafted cellulose nanocrystal and 20-50 parts by weight of deionize water. The furan ring-terminated polyethylene glycol is crosslinked with maleimide group grafted cellulose nanocrystal to form a spatial network structure, which is beneficial to the uniform distribution of pores and the improvement of the overall gel properties of porous PVA / cellulose nanocrystalline hydrogels, so that the porous PVA / cellulose nanocrystalline hydrogel prepared by the components and materials of the present invention and the improvement of the microstructure of the PVA hydrogel has thin pore walls, uniform pore size distribution and good swelling and mechanical properties.

Description

technical field [0001] The invention relates to the technical field of materials, in particular to a porous PVA / cellulose nanocrystalline hydrogel and a preparation method thereof. Background technique [0002] In the 1950s, the gelation phenomenon of polyvinyl alcohol (PVA) aqueous solution was first noticed. In addition to the performance of general hydrogels, PVA hydrogel has the advantages of low toxicity, excellent mechanical properties (high Young's modulus and high mechanical strength), high water absorption and good biocompatibility. However, with the wide application of polyvinyl alcohol hydrogels in the field of packaging such as fruit and vegetable preservation, food packaging water absorption protection, people have put forward more and more higher requirements on its microstructure and properties such as swelling and mechanical properties. Require. [0003] Prior art reports can adopt multiple methods to improve the performance of PVA hydrogel, such as methods...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C08L29/04C08L71/02C08L51/02C08J9/28
CPCC08J9/28C08J2329/04C08J2451/02C08J2471/02
Inventor 周光远姜敏梁全铎张强
Owner 芜湖万隆新材料有限公司
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com