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

A temperature-sensitive sodium alginate/cellulose ether composite hydrogel and its preparation method and application

A temperature-sensitive, composite hydrogel technology, applied in water/sewage treatment, chemical instruments and methods, adsorption water/sewage treatment, etc., can solve the problem that gel biocompatibility and degradability cannot be fundamentally improved, etc. problems, to achieve the effects of convenient recycling, increased adsorption capacity, and high adsorption selectivity

Active Publication Date: 2022-01-04
DALIAN OCEAN UNIV
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the main structure is still a synthetic polymer, the biocompatibility and degradability of the gel itself cannot be fundamentally improved

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
  • A temperature-sensitive sodium alginate/cellulose ether composite hydrogel and its preparation method and application
  • A temperature-sensitive sodium alginate/cellulose ether composite hydrogel and its preparation method and application
  • A temperature-sensitive sodium alginate/cellulose ether composite hydrogel and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Such as figure 1 Shown, temperature-sensitive sodium alginate / cellulose ether composite hydrogel preparation method:

[0038] (1) Preparation of 2-hydroxy-3-pentoxypropyl cellulose:

[0039] Add 5 g of cellulose into a 100 ml three-necked flask, add 12.5 ml of water to disperse, stir and heat to 70°C. 0.58 g of 40% sodium hydroxide was added dropwise in a three-neck flask, and alkalized at 70° C. for 1 h. Then, 5 grams of pentyloxyglycidyl ether was added dropwise to the reaction liquid after alkalization, and reacted at 70° C. for 9 hours. After completion of the reaction, dilute with 100 milliliters of water and cool to room temperature, neutralize with hydrochloric acid to a pH value of 7, then put it into a dialysis bag with a molecular weight of 7000-14000 and put it into a deionized medium for dialysis. The conductivity of the deionized water is less than 10 μs / cm was the completion of dialysis, and most of the water was removed with a rotary evaporator, and th...

Embodiment 2

[0061] This example is basically the same as Example 1, except that in (3), the crosslinking agent is 200 μL epichlorohydrin and 900 μL calcium chloride solution, and the specific reaction conditions are shown in Table 1;

[0062] The composite gel obtained in the embodiment was tested according to the above application examples, and the adsorption capacity of the sodium alginate / cellulose ether composite gel SC-2 to heavy metal ions was 251.2 mg / g; the mass of the SC-2 gel after recovery and regeneration It was 0.267g, and the recovery efficiency was 89.0%.

[0063] Table 1

[0064]

Embodiment 3

[0066] This embodiment is basically the same as Example 1, except that in (3), the amount of NaOH is 0.3g (40%), the cross-linking agent is 50 μL vinyl sulfone and 60 μL calcium chloride solution, and the reaction temperature is 20° C. For 0.5h, the specific reaction conditions are shown in Table 2;

[0067] The composite gel obtained in the embodiment was tested according to the above application examples, and the adsorption capacity of the sodium alginate / cellulose ether composite gel SC-3 to heavy metal ions was 138.9 mg / g; the mass of the SC-3 gel after recovery and regeneration was It is 0.289g, and the recovery efficiency is 96.3%.

[0068] Table 2

[0069]

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
adsorption capacityaaaaaaaaaa
adsorption capacityaaaaaaaaaa
adsorption capacityaaaaaaaaaa
Login to View More

Abstract

The invention belongs to the technical field of gel preparation, in particular to a temperature-sensitive sodium alginate / cellulose ether composite hydrogel, a preparation method and application thereof. React cellulose with an etherification agent to obtain a temperature-sensitive alkyl cellulose ether; add sodium alginate to a temperature-sensitive alkyl cellulose ether to obtain a mixed solution; cross-link the mixed solution with a cross-linking agent to obtain a temperature-sensitive composite Hydrogels. By changing the mass ratio of alkyl cellulose ether and sodium alginate, the volume phase transition temperature (VPTT) can be adjusted in the range of 15.5-75.8°C. The sodium alginate / cellulose ether composite hydrogel prepared by the present invention has excellent temperature sensitivity, and at the same time has the characteristics of low price, good biocompatibility, low toxicity, and degradability, and at the same time shows good resistance to heavy metal ions Adsorption capacity.

Description

technical field [0001] The invention belongs to the technical field of gel preparation, in particular to a temperature-sensitive sodium alginate / cellulose ether composite hydrogel, a preparation method and application thereof. Background technique [0002] Stimuli-responsive hydrogels are a class of polymers whose network structure and physical and chemical properties undergo mutations under the stimulation of small changes in the external environment (temperature, pH, light, etc.). Temperature-sensitive hydrogels are the most concerned category among many stimuli-responsive hydrogels, because temperature changes are relatively easy to implement and control, and can be efficiently applied in heavy metal ion adsorption, drug controlled release, soft tissue repair, etc. aspect. At present, temperature-responsive hydrogels are mainly divided into two categories: the first type is synthetic temperature-sensitive hydrogels, and poly-N-isopropylacrylamide (PNIPAAm) hydrogels are ...

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 Patents(China)
IPC IPC(8): C08J9/28C08J3/24C08J3/075C08L1/28C08L5/04B01J20/26B01J20/28C02F1/28B01J20/30C02F101/20
CPCC08J9/28C08J3/246C08J3/075B01J20/24B01J20/265B01J20/28047C02F1/286C02F1/285C02F2101/20C08J2301/28C08J2405/04C08J2305/04C08J2401/28C08J2201/0484
Inventor 田野刘鹰代明允
Owner DALIAN OCEAN UNIV
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