A method for pre-radiation synthesis of natural polysaccharide hydrogel-based photocatalyst without recycling

Abstract

The invention provides a recycling-free natural polysaccharide hydrogel-based photocatalyst pre-irradiation synthesis method, which belongs to the field of nuclear biology technology. It solves the technical problems of low photocatalytic efficiency, difficulty in recycling, and poor mechanical properties of natural polysaccharide hydrogel-based photocatalysts prepared by existing methods. This method is to mix natural polysaccharides, radiation sensitizers, pH regulators, nanophotocatalysts and other main base materials to form a stable dispersion, and prepare the first layer of hydrogel network structure through cyclic freezing and thawing; through low-dose The pre-irradiated monomer forms a prepolymer solution and penetrates into the first layer network structure of the hydrogel. The resulting sample is radiated and cross-linked again to form the second layer network structure of the hydrogel, that is, the polymer is a double network. Recycling-free natural polysaccharide hydrogel-based photocatalyst. The invention has the advantages of high photocatalytic efficiency, degradability, high strength, no recycling, and low cost.

Description

technical field [0001] The invention belongs to the technical field of nuclear biology, and relates to a pre-radiation synthesis method of a recovery-free natural polysaccharide hydrogel-based photocatalyst. Background technique [0002] Hydrogel is a three-dimensional interpenetrating network structure between liquid and solid. It is a hydrophilic polymer gel that can significantly swell in water but cannot be dissolved in water. Although hydrogel contains a lot of water, But it can show a certain shape like a solid. In particular, the double-network structure high-strength smart hydrogel based on natural polysaccharides is one of the key points and frontiers of polymer science research, and has extremely important research and development in medicine, catalysis, antibacterial, environmental protection and related fields. Value. [0003] Although various methods have been used to prepare hydrogels with different compositions, structures and properties, there are still som...

AI Technical Summary

Problems solved by technology

[0004] Due to the ubiquitous problems of hydrogel properties, the uniformity of the network structure is insufficient, and the stress is poor.

The inhomogeneity of the network structure is one of the key factors causing the low mechanical properties of traditional hydrogels. Hydrogels crosslinked by traditional chemical crosslinking agents may have inhomogeneity in the network structure during the preparation process, resulting in low gel strength. , brittle

Therefore, when an external force is applied, the distribution of stress in the network is not uniform, and the polymer chains are easily broken in the stress concentration area to form tiny cracks, and then the stress propagates along the cracks, eventually leading to hydrogel damage.