Three-dimensional network hydrogel realizes one-step preparation
China Drying Newsletter With the support of the National Natural Science Foundation of China, a few days ago, the Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences made new progress in the preparation and application of three-dimensional network hydrogel materials.
From the perspective of molecular design, the research group used the active chemical reactivity of natural polymer chitosan and the feature of being positively charged under certain conditions, and achieved a one-step method for preparing granular hydrogel under the conditions of room temperature and air atmosphere. product. Subsequently, the research group used a hydrogel three-dimensional network as a micro-nano reactor to develop a silver-hydrogel catalytic material. The swellable three-dimensional network of the hydrogel can absorb more silver nanoparticles, and tight surface cross-linking of the aluminum ions can effectively prevent the leakage of the silver nanoparticles.
In recent years, three-dimensional network structure hydrogels have received extensive attention in the treatment of environmental pollutants. However, hydrogels formed by traditional aqueous solution polymerization methods are colloidal products, which require granulation and other treatment processes, and have high energy consumption for drying .
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