Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

HEC/PVA interpenetrating network aerogel and preparation method thereof

An interpenetrating network and aerogel technology, applied in the field of HEC/PVA interpenetrating network aerogel and its preparation, can solve the problems of low recovery, few recycle times, poor mechanical properties of aerogel, etc. High recovery performance, good biodegradability, and the effect of many cycles of use

Active Publication Date: 2019-09-20
SHAANXI UNIV OF SCI & TECH
View PDF2 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the technical problems existing in the above-mentioned prior art, the present invention provides a HEC / PVA interpenetrating network airgel and a preparation method thereof, so as to solve the problems of poor mechanical properties and low resilience of the airgel prepared by HEC in the prior art And the technical problem that can be recycled less times

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
  • HEC/PVA interpenetrating network aerogel and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0025] The present invention provides a kind of preparation method of HEC / PVA interpenetrating network airgel, comprises the following steps:

[0026] Step 1, mixing polyisocyanate and nano-cellulose microcrystalline solution, stirring to obtain a uniform milky white mixed solution;

[0027] Wherein, the polyisocyanate and the nanocellulose microcrystalline solution are mixed in a mass ratio of (1-3): 100; the polypolyisocyanate adopts water-soluble blocked polyisocyanate; the mass percentage of the nanocellulose microcrystalline solution is 1%. -3%; nanocellulose microcrystal solution is used to mix nanocellulose microcrystals with water and stir until a uniform light blue solution is obtained.

[0028] Step 2. Mix the mixed solution with the hydroxyethyl cellulose solution, stir, and ultrasonically degas to obtain the HEC / CNC / polyisocyanate solution; the mass ratio of the mixed solution to the hydroxyethyl cellulose solution is 1: (10-20) The ratio is mixed; the mass percen...

Embodiment 1

[0032] A kind of preparation method of HEC / PVA interpenetrating network airgel of the present invention, comprises the following steps:

[0033] Step 1. Mix hydroxyethyl cellulose with deionized water, let it stand for swelling for 1 hour, and stir to prepare a 1% hydroxyethyl cellulose solution by mass;

[0034] Step 2, mixing nanocellulose microcrystals with deionized water, stirring until a uniform light blue solution is obtained, and preparing a nanocellulose microcrystal solution with a mass percentage of 1%;

[0035] Step 3, mixing polyisocyanate with the nanocellulose microcrystalline solution in step 2 in a mass ratio of 1:100, stirring until uniform milky white is present, to obtain a mixed solution;

[0036] Step 4. Mix the mixed solution in step 3 with the hydroxyethyl cellulose solution in step 1 in a mass ratio of 1:10, stir, and ultrasonically degas for 0.5 h to obtain HEC / CNC / polyisocyanate solution;

[0037] Step 5. Place the HEC / CNC / polyisocyanate solution in...

Embodiment 2

[0044] A kind of preparation method of HEC / PVA interpenetrating network airgel of the present invention, comprises the following steps:

[0045] Step 1. Mix hydroxyethyl cellulose and deionized water, let it stand for swelling for 3 hours, and stir to prepare a hydroxyethyl cellulose solution with a mass percentage of 1.5%.

[0046] Step 2, mixing the nanocellulose microcrystals with deionized water, stirring to a uniform light blue solution, and preparing a nanocellulose microcrystal solution with a mass percentage of 1.5%;

[0047] Step 3, mixing polyisocyanate with the nanocellulose microcrystalline solution in step 2 in a mass ratio of 1.5:100, stirring until uniform milky white is present, to obtain a mixed solution;

[0048] Step 4. Mix the mixed solution in step 3 with the hydroxyethyl cellulose solution in step 1 in a mass ratio of 1:15, stir, and ultrasonically degas for 0.7 hours to obtain HEC / CNC / polyisocyanate solution;

[0049] Step 5. Place the HEC / CNC / polypolyiso...

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
breaking strengthaaaaaaaaaa
breaking strengthaaaaaaaaaa
breaking strengthaaaaaaaaaa
Login to View More

Abstract

The invention provides a HEC / PVA interpenetrating network aerogel and a preparation method thereof. The preparation method comprises the following steps: firstly mixing poly(polyisocyanate) with a nano cellulose microcrystalline solution, and performing stirring to obtain a mixed solution; then mixing the mixed solution with a hydroxyethyl cellulose solution, performing stirring, and performing ultrasonic degassing; then performing freezing and drying on the HEC / CNC / poly(polyisocyanate) solution to obtain a HEC / CNC / poly(polyisocyanate) aerogel; and finally immersing the HEC / CNC / poly(polyisocyanate) aerogel by using a polyvinyl alcohol / glutaraldehyde solution, and performing freezing and drying to obtain the HEC / PVA interpenetrating network aerogel. According to the method, hydroxyethyl cellulose is used as a matrix material, and the nano cellulose microcrystal is used as a reinforcing skeleton; a large number of hydroxyl groups of hydroxyethyl cellulose and the nano cellulose microcrystal are cross-linked and reinforced by using poly(polyisocyanate); and the HEC / PVA interpenetrating network aerogel is successfully prepared by cross-linking with glutaraldehyde. The operation is simple, the cost is low, and mechanical properties, recovery property and recyclable times of the prepared HEC / PVA interpenetrating network aerogel are all greatly improved.

Description

technical field [0001] The invention belongs to the technical field of cellulose airgel, and in particular relates to an HEC / PVA interpenetrating network airgel and a preparation method thereof. Background technique [0002] Airgel is a material with a porous three-dimensional network structure, its porosity is as high as more than 90%, and the gaps are filled with air. Because of its special structure, airgel has the characteristics of high specific surface area, low density and low thermal conductivity, which makes it have natural advantages in the fields of light heat preservation and sewage treatment. [0003] Hydroxyethyl cellulose (HEC) is a non-ionic cellulose derivative, which has good biodegradability, renewability and water solubility. The airgel prepared by hydroxyethyl cellulose is light in weight and high in specific surface area. However, it has the disadvantages of poor mechanical properties, low recovery and few recyclable times. Contents of the invention ...

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
Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/42C08J9/28C08L29/04C08L1/28C08L1/04
CPCC08J9/42C08J9/286C08J2429/04C08J2301/28C08J2401/04
Inventor 陆赵情李娇阳黄吉振谢璠马秦杨凯伦
Owner SHAANXI UNIV OF SCI & TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com