Method for preparing nano-composite hydrogel with excellent mechanical performances

Abstract

The invention relates to a method for preparing nano composite hydrogel with good mechanical property, which is characterized by comprising the following steps: firstly, an anhydrous monomer and physical crosslinking agent inorganic clay are dispersed in deionized water, nitrogen enters into a closed container under the condition of normal temperature and normal pressure, and then the mixture is stirred; secondly, an initiator is added, stirring is continued under the condition of normal temperature and normal pressure, and a hydrogel solution is prepared; and thirdly, the solution undergoes free radical polymerization reaction at a certain temperature, and then a reactant is immersed in the deionized water so as to prepare the nano composite hydrogel with good mechanical property. The method has the advantages that: not only the preparation technique is simple but also the gel prepared simultaneously has good transparency, hydroscopic and swelling capacity, and mechanical property.

Description

Technical field

[0001] The invention relates to a method for preparing a composite hydrogel, in particular to a method for preparing a nano composite hydrogel with good mechanical properties. Background technique

[0002] Hydrogel is a multi-element system composed of a three-dimensional network of polymers and water. It can swell in water and retain a large amount of water without dissolving. It is a material form ubiquitous in nature. Many parts of the biological body (such as the human body) The muscles, blood vessels, eyeballs and other organs are all made of hydrogel. Due to its good biocompatibility, since the 1940s, research on the synthesis, physical and chemical properties of hydrogels and their applications in biology, medicine and other fields has been very active.

[0003] According to the different bonding methods of the hydrogel network, it can be divided into physical cross-linked gel and chemical cross-linked gel. Chemically cross-linked gels usually use a small a...