Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of biomass-based hydrogel and its preparation method and application

A biomass and hydrogel technology, applied in the directions of gel preparation, chemical instruments and methods, colloid chemistry, etc., can solve the problems of limited application in the synthesis process, and achieve good adsorption effect, strong mechanical strength, and high self-healing ability. Effect

Active Publication Date: 2022-04-12
SOUTH CHINA AGRI UNIV
View PDF14 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although they have been successful in improving the mechanical and self-healing properties of hydrogels, the multiple influencing factors and complicated synthesis process of the first network on the second network limit their applications.

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 kind of biomass-based hydrogel and its preparation method and application
  • A kind of biomass-based hydrogel and its preparation method and application
  • A kind of biomass-based hydrogel and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048]A biomass-based hydrogel, which is made by the following preparation method:

[0049] Step 1: Prepare eutectic solvent

[0050] Choline chloride and urea were mixed in a beaker at a molar ratio of 1:2, heated on a magnetic stirrer, and stirred at a speed of 150 rpm until a clear liquid was formed.

[0051] Step 2: Biomass Pretreatment

[0052] The pine nut shells are crushed to 200 mesh, cleaned with distilled water and then dried in a blast dryer. Mix 5g of dried pine nut shells with the eutectic solvent prepared in step 1 in a 500mL beaker, the mass ratio of pine nut shells and solvent is 1:20, and treat at 130°C for 2h. Then add 200mL of water to the treated pine nut shells and stir them to regenerate cellulose from the pine nut shells. After the treatment, wash, filter and dry to make modified pine nut shells, which are stored in sealed bags for later use.

[0053] Step 3: Prepare the first mixed solution

[0054] Take a 500mL clean beaker, add 5g of acrylamide (...

Embodiment 2

[0058] A biomass-based hydrogel, which is made by the following preparation method:

[0059] Step 1: Prepare eutectic solvent

[0060] Choline chloride and acetic acid were mixed in a beaker at a molar ratio of 1:2, heated on a magnetic stirrer, and stirred at a speed of 150 rpm until a clear liquid was formed.

[0061] Step 2: Biomass Pretreatment

[0062] The pine nut shells are crushed to 200 mesh, cleaned with distilled water and then dried in a blast dryer. Mix 5g of dried pine nut shells with the eutectic solvent prepared in step 1 in a 500mL beaker, the mass ratio of pine nut shells and solvent is 1:20, and treat at 130°C for 2h. Then add 200mL of water to the treated pine nut shells and stir them to regenerate cellulose from the pine nut shells. After the treatment, wash, filter and dry to make modified pine nut shells, which are stored in sealed bags for later use.

[0063] Step 3: Prepare the first mixed solution

[0064] Take a 500mL clean beaker, add 5g of acry...

Embodiment 3

[0090] The hydrogels prepared in Example 1 and control groups 1 and 2 were used to adsorb dyes, including methylene blue, saffron red T, malachite green and crystal violet. When it is used to adsorb methylene blue, malachite green and crystal violet, the adsorption pH is 4; when it is used to adsorb saffron red T, the adsorption pH is 2.

[0091] In order to study the adsorption properties of hydrogels on dyes under different pH conditions, this experiment used 0.1 mol L -1 nitric acid or 0.1mol·L -1 The pH of the solution was adjusted to 2, 4, 6, 8, and 10 with NaOH, and 0.1 g of biomass-based hydrogel was added to 50 mL of dye solution. The adsorption time of crystal violet was 90 min, and methylene blue, malachite green, and saffron The adsorption time of red T is 240min. The result is as Figure 8-11 shown.

[0092] Depend on Figure 8 It can be seen that the three hydrogels have the same adsorption tendency for methylene blue. The adsorption is the worst when the pH ...

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 discloses a preparation method of a biomass-based hydrogel, which comprises the following steps: preparing a co-melting solvent: mixing choline chloride and urea; or choline chloride and acetic acid, mixing, stirring and heating until a clear Liquid; biomass pretreatment: pulverize the biomass powder, clean it and dry it, then mix it with eutectic solvent to make modified biomass for later use; take acrylamide, acrylic acid, sodium hydroxide and modified biomass, dissolve them in water, Stir evenly under heating conditions to form a first mixed solution; dissolve potassium persulfate and N,N'-methylenebisacrylamide in water to form a second mixed solution; synthesize biomass-based hydrogel: the first mixed solution When the solution is heated to 30-35°C, add the second mixed solution, heat and stir until the system temperature reaches 128-130°C, the solution is formed, then stop heating and cool down. The biomass-based hydrogel of the invention can be used to adsorb various dyes, and has strong adsorption capacity.

Description

technical field [0001] The invention relates to the field of hydrogel technology, in particular to a biomass-based hydrogel and its preparation method and application. Background technique [0002] Hydrogels are polymers with rich three-dimensional networks that can be cross-linked by physical or chemical methods and are insoluble in many different solvents because of the presence of hydrophilic groups such as hydroxyl (-OH), carboxyl (-COOH) , sulfuric acid groups (-SO3H) and imidazole rings, etc., can absorb 10% to thousands of times their dry weight in water or biological fluids, making them have physical properties similar to soft tissues. [0003] Polymer hydrogels can accommodate large amounts of water while maintaining structure due to chemical or physical cross-linking of polymer chains. However, hydrogels exhibit poor mechanical strength due to high water content, making them unsuitable for several biomedical and industrial applications. To overcome this problem, ...

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): B01J13/00B01J20/24B01J20/28B01J20/30C02F1/28C02F101/30
CPCB01J13/0065B01J13/0056B01J20/24B01J20/28047C02F1/286C02F2101/308
Inventor 蒋恩臣贾志文许细薇卢璐璎程树朝何臻
Owner SOUTH CHINA AGRI UNIV