23 Jul Preparation method and application of high-strength oriented polyvinyl alcohol hydrogel
Abstract
The invention belongs to the technical field of intelligent high-molecular materials, and relates to a preparation method and an application of a high-strength oriented polyvinyl alcohol hydrogel. Thepreparation method of the high-strength oriented polyvinyl alcohol hydrogel comprises the following steps: adding deionized water to dissolve polyvinyl alcohol powder, carrying out freeze-thawing circulation, pre-stretching orientation and freeze drying to obtain a polyvinyl alcohol aerogel, and immersing the obtained polyvinyl alcohol aerogel in an aqueous solution of a salt having a Hofmann effect or an aqueous solution of a salt capable of forming a coordinate bond or an aqueous solution of a polycarboxy compound capable of forming a hydrogen bond with polyvinyl alcohol to prepare the high-strength oriented polyvinyl alcohol hydrogel. The high-strength oriented polyvinyl alcohol hydrogel has a tensile strength reaching up to 41.0 MPa, an elongation at break reaching up to 228.0% and atoughness reaching up to 49.94 MJ/m<3>, also has antibacterial and anticorrosive effects and a free radical scavenging effect, and is of great significance to broaden the application of the polyvinylalcohol hydrogel in artificial muscles and cartilages, tissue engineering and other biomedical materials.
Year: 2019
Country: CN
Doc No: 110229374