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High-strength nano composite hydrogel and preparation method thereof

A nanocomposite, hydrogel technology, applied in the field of polymers

Inactive Publication Date: 2018-09-28
CHANGSHA QIUDIANBING INFORMATION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a high-strength nano-composite hydrogel and its preparation method to solve the problems in the Chinese patent document "A Composite Hydrogel Adsorbing Heavy Metal Ions and Its Preparation Method (Patent No.: ZL201410540016.1)" On the basis of disclosure, how to optimize components, dosage, methods, etc. to improve the mechanical properties of composite hydrogels

Method used

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  • High-strength nano composite hydrogel and preparation method thereof

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preparation example Construction

[0029] The preparation method of described high-strength nanocomposite hydrogel comprises the following steps:

[0030] S1: add graphite oxide into deionized water and ultrasonically peel for 20-30 minutes to obtain a graphene oxide aqueous solution, then add styrene, and process graphene oxide and styrene by ball milling to prepare a styrene / graphene oxide nanocomposite material;

[0031] S2: Take 10-20 parts of shredded eucalyptus wood pulp, add 90-110ml of sodium hydroxide with a concentration of 4wt%, and fully react at 70-90°C for 2 hours to obtain a cellulose pre-reactant; add 65wt to the cellulose pre-reactant % concentrated sulfuric acid solution, mixed evenly, placed in a water bath at 50-60°C for 2 hours, then centrifuged and precipitated to obtain a cellulose suspension, and then the cellulose suspension was centrifuged to remove larger-sized precipitates, crystallized, and prepared Obtain nanocellulose crystals; the particle size of the nanocellulose crystals is 22...

Embodiment 1

[0036] A high-strength nanocomposite hydrogel, in parts by weight, comprising the following components: 45 parts of polyvinyl alcohol, 55 parts of carboxymethyl chitosan, 14 parts of modified graphene oxide, 10 parts of sodium alginate, 8 parts of oxidized hydroxypropyl starch, 3 parts of citric acid, 1.5 parts of tetramethylethylenediamine, 10 parts of nanocellulose crystals, 3 parts of hydrogen peroxide, and 5 parts of sodium benzenesulfonate.

[0037] The preparation method of described high-strength nanocomposite hydrogel comprises the following steps:

[0038] S1: adding graphite oxide into deionized water and ultrasonically stripping for 30 minutes to obtain a graphene oxide aqueous solution, then adding styrene, and treating graphene oxide and styrene with a ball milling method to prepare a styrene / graphene oxide nanocomposite material;

[0039] S2: Take 15 parts of crushed eucalyptus pulp, add 90ml of sodium hydroxide with a concentration of 4wt%, and fully react at 90...

Embodiment 2

[0044] A high-strength nanocomposite hydrogel, in parts by weight, comprising the following components: 65 parts of polyvinyl alcohol, 45 parts of carboxymethyl chitosan, 12 parts of modified graphene oxide, 8 parts of sodium alginate, 5 parts of oxidized hydroxypropyl starch, 2 parts of citric acid, 0.5 parts of tetramethylethylenediamine, 20 parts of nanocellulose crystals, 7 parts of hydrogen peroxide, and 8 parts of sodium benzenesulfonate.

[0045] The preparation method of described high-strength nanocomposite hydrogel comprises the following steps:

[0046] S1: Add graphite oxide into deionized water and ultrasonically peel for 25 minutes to obtain a graphene oxide aqueous solution, then add styrene, and process graphene oxide and styrene by ball milling to prepare a styrene / graphene oxide nanocomposite material;

[0047] S2: Take 10 parts of crushed eucalyptus wood pulp and add 110ml of sodium hydroxide with a concentration of 4wt%, and fully react at 80°C for 2 hours ...

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Abstract

The invention discloses a high-strength nano composite hydrogel and a preparation method thereof, and belongs to the technical field of high-molecular materials. The nano composite hydrogel comprisesthe following components: polyvinyl alcohol, carboxymethyl chitosan, modified graphene oxide, sodium alginate, oxidized hydroxypropyl starch, a cross-linking agent, a reducing agent, a nano cellulosecrystal, hydrogen peroxide and sodium benzenesulfonate. The nano composite hydrogel is prepared by the steps of carrying out mixing, carrying out stirring, carrying out heating, carrying out ultrasonic treatment and the like. According to the invention, the fracture tensile strength and the elongation at break of the nano composite hydrogel are improved by adopting a reinforcing system consistingof the nano cellulose crystal, the hydrogen peroxide and the sodium benzenesulfonate.

Description

technical field [0001] The invention belongs to the technical field of macromolecules, and in particular relates to a high-strength nanocomposite hydrogel and a preparation method thereof. Background technique [0002] Hydrogel is a polymer with a three-dimensional network structure, which has good water absorption, swelling and permeability, so it is widely used in biomedical materials, food and agriculture and other fields. According to whether the hydrogel itself can respond to external stimuli, it can be divided into ordinary hydrogel and smart hydrogel. Most hydrogels are formed by chemical crosslinking, but they can also be physically crosslinked. Synthetic hydrogels usually have disadvantages such as low gel strength, poor toughness, and slow water absorption, which cannot meet the requirements of use. Researchers have carried out a lot of research work on improving the mechanical properties of hydrogels, and developed several new types of gels with excellent mechan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L5/08C08L29/04C08L1/02C08K13/06C08K9/04C08K3/04C08K5/42C08K3/18C08J3/075
CPCC08J3/075C08J2305/08C08J2329/04C08J2401/02C08J2405/08C08J2429/04C08K3/042C08K3/18C08K5/42C08K9/04C08K13/06
Inventor 不公告发明人
Owner CHANGSHA QIUDIANBING INFORMATION TECH CO LTD
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