23 Jul Method for preparing high-strength double-network nano silicon dioxide composite hydrogel
Abstract
The invention discloses a method for preparing high-strength double-network nano silicon dioxide composite hydrogel. The method comprises the following steps: preparing a nano SiO2 water solution by using cooled boiled distilled water, dissolving sodium alginate, acrylamide, a cross-linking agent, an initiator and a catalyst into the SiO2 aqueous solution, rapidly transferring the prepared solution to a glass mold, putting the sealed mold into an environment of 45-55 DEG C, and performing heat-preservation reaction for 2-6 hours; taking out the hydrogel formed inside the mold, soaking the hydrogel in a CaC12 aqueous solution with the concentration of 0.1-1M for 2-6 hours, and taking out the product, thereby obtaining the high-strength double-network nano silicon dioxide composite hydrogel. Compared with the conventional hydrogel, the composite hydrogel disclosed by the invention is relatively high in strength and elongation, and the application demands in human body cartilage repairing, tissue engineering and the like can be met.
Year: 2015
Country: CN
Doc No: 104262881