Cellulose/two-dimensional layered material composite hydrogel and preparation method thereof

A composite hydrogel and two-dimensional layered technology, which is applied in the field of cellulose/two-dimensional layered material composite hydrogel and its preparation, can solve the problem of restricting the development of cellulose, difficult processing and molding, and insoluble and infusible cellulose and other issues, to achieve good mechanical strength, complete biocompatibility, and good dispersion

Inactive Publication Date: 2018-05-01
SHENZHEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Cellulose is the most abundant renewable resource on earth and has the advantages of complete biocompatibility and complete biodegradability. It is difficult to process and shape, which greatly limits the development of cellulose in biomedical materials

Method used

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  • Cellulose/two-dimensional layered material composite hydrogel and preparation method thereof
  • Cellulose/two-dimensional layered material composite hydrogel and preparation method thereof
  • Cellulose/two-dimensional layered material composite hydrogel and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0075] A kind of cellulose / few layer Ti 3 C 2 T x A method for preparing a composite hydrogel of nanosheets, comprising:

[0076] Step (1). Preparation of few-layer Ti by liquid phase exfoliation 3 C 2 T x Nanosheet, its specific steps are as follows:

[0077] 1-a): Preparation of multilayer Ti by hydrofluoric acid etching 3 C 2 T x Material, the specific operation of the material is as follows: the powdery ternary layered nitride Ti 3 AlC 2 Add hydrofluoric acid aqueous solution (the mass fraction of HF is 10% to 40%) into a polyethylene plastic beaker to react according to the solid content ratio of 10g / 100mL. Among them, the ternary layered nitride Ti 3 C 2 T x It needs to be slowly added into the hydrofluoric acid aqueous solution, and the time for slow addition is 10 minutes to 30 minutes. After the addition is completed, react at the reaction temperature for 12 hours to 24 hours. After the reaction, the obtained etching mixture was centrifuged at 17000 rpm ...

Embodiment 2

[0092] Preparation of cellulose / few-layer Ti 3 C 2 T x The composite hydrogel of nanosheet / , the difference with embodiment 1 is, in step 3-a), cellulose and few layers of Ti 3 C 2 T x The mass ratio of nanosheets is 100:0.01.

Embodiment 3

[0094] Preparation of cellulose / few-layer Ti 3 C 2 T x The composite hydrogel of nanosheet / , the difference with embodiment 1 is, in step 3-a), cellulose and few layers of Ti 3 C 2 T x The mass ratio of nanosheets is 100:0.03.

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Abstract

The invention provides a cellulose/two-dimensional layered material composite hydrogel. The composite hydrogel comprises a cellulose three-dimensional network structure and a two-dimensional materialsupported in the cellulose three-dimensional network structure, wherein the two-dimensional layered material is a two-dimensional transition metal carbide, nitride, or carbonitride. According to the composite hydrogel provided by the invention, the two-dimensional layered material can be stably supported in the composite hydrogel system and is not easy to agglomerate; and the composite hydrogel has good compatibility with a biological fluid, and the advantages of full biodegradability and high biological safety, and can be used in the field of biomedicines. The invention also provides a preparation method of the composite hydrogel.

Description

technical field [0001] The invention belongs to the field of hydrogel preparation, and in particular relates to a cellulose / two-dimensional layered material composite hydrogel and a preparation method thereof. Background technique [0002] Two-dimensional transition metal carbides or carbonitrides (MXenes) are a new two-dimensional material discovered this year. It has the characteristics of high specific surface area, high electrical conductivity, etc., and has flexible and adjustable components. The smallest nano-layer With the advantages of controllable thickness, it has great potential in the fields of energy storage, electromagnetic shielding, water treatment, gas / biological sensing, and photoelectrochemical catalysis. In order to emphasize its two-dimensional structure similar to graphene, this type of compound is collectively named MXenes. [0003] In the field of biomedicine, MXenes exhibit excellent photothermal conversion efficiency under near-infrared light (such...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/075C08L1/02C08K7/00C08K3/14C08K3/28
CPCC08J3/075C08J2301/02C08K3/14C08K3/28C08K7/00C08K2201/011
Inventor 张晗邢晨阳陈世优
Owner SHENZHEN UNIV
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