Abstract: Provided by the present invention is a cathode material for a sodium-ion battery with a coating structure and a preparation method therefor. In the present invention, an Na3V2(PO4)3/C cathode material is prepared by means of a sol-gel method. Synthesized zwitterionic polymers may be used as chelating agents and as a carbon source; the process is simple, can quickly form a gel, and the reaction time is shortened contains a zwitterionic structure which may be well dissolved with the precursor of sodium vanadium phosphate to form a stable carbon coating layer. Compared to the prior art, the cathode material for a sodium-ion battery of the present invention enhances the electrical conductivity and cycle performance of the cathode material by means of the doping of nitrogen and sulfur on carbon. At the same time, the prepared cathode material for a sodium-ion battery has sodium vacancies and maintains a stable structure during the process of sodium-ion intercalation/deintercalation.

Abstract: The present disclosure provides a method for preparing hollow glass microbeads coated with graphene oxide, which includes: dispersing graphene oxide into deionized water, to form an aqueous graphene oxide solution; placing hollow glass microbeads into the aqueous graphene oxide solution, to achieve a dispersion liquid; and simultaneously performing an ultrasonic vibration treatment and a drying treatment to the dispersion liquid, to achieve the hollow glass microbeads coated with the graphene oxide. Through simultaneously performing the ultrasonic vibration treatment and the drying treatment to the dispersion liquid, the graphene oxide is uniformly coated on the surface of the hollow glass microbeads, and thus the surface properties of the hollow glass microbeads are maintained, because no other additives such as adhesives are required.

Abstract: Provided by the present invention is a cathode material for a sodium-ion battery with a coating structure and a preparation method therefor. In the present invention, an Na3V2(PO4)3/C cathode material is prepared by means of a sol-gel method. Synthesized zwitterionic polymers may be used as chelating agents and as a carbon source; the process is simple, can quickly form a gel, and the reaction time is shortened contains a zwitterionic structure which may be well dissolved with the precursor of sodium vanadium phosphate to form a stable carbon coating layer. Compared to the prior art, the cathode material for a sodium-ion battery of the present invention enhances the electrical conductivity and cycle performance of the cathode material by means of the doping of nitrogen and sulfur on carbon. At the same time, the prepared cathode material for a sodium-ion battery has sodium vacancies and maintains a stable structure during the process of sodium-ion intercalation/deintercalation.

Abstract: The present invention is applicable to the field of polymer material preparation, and provides a method for preparing polymer hollow microspheres, the steps are as follows: mixing a styrene-based monomer A, an acrylic monomer B, and an acrylate monomer C with a initiator, and reacting to prepare a seed emulsion; maintaining the temperature of the seed emulsion unchanged, mixing the styrene-based monomer A, the monomer C, and a sulfur-containing acrylic monomer D with the initiator, continuously dripping to the seed emulsion, to obtain a product; adding alkaline solution to the product, then adding acid solution, and finally neutralizing, to obtain hollow microspheres.

Abstract: The present invention relates to the field of shape memory materials. Specifically, a shape memory polymer, a preparation method therefor, and use thereof are provided. The shape memory polymer is formed by polymerizing methyl ally polyethenoxy ether and 2-(dimethylamino)ethyl methacrylate. The synthesis steps of the shape memory polymer are simplified, the preparation method is simple, and the production cost is low. In addition, the shape memory polymer prepared in the present invention has excellent shape memory performance and high hydrophilicity and biocompatibility, and is suitable for preparing biomedical materials in the field of biomedical science.

Abstract: The present invention is applicable to the field of polymer material preparation, and provides a method for preparing polymer hollow microspheres, the steps are as follows: mixing a styrene-based monomer A, an acrylic monomer B, and an acrylate monomer C with a initiator, and reacting to prepare a seed emulsion; maintaining the temperature of the seed emulsion unchanged, mixing the styrene-based monomer A, the monomer C, and a sulfur-containing acrylic monomer D with the initiator, continuously dripping to the seed emulsion, to obtain a product; adding alkaline solution to the product, then adding acid solution, and finally neutralizing, to obtain hollow microspheres.

Abstract: The present invention relates to the field of shape memory materials. Specifically, a shape memory polymer, a preparation method therefor, and use thereof are provided. The shape memory polymer is formed by polymerizing methyl ally polyethenoxy ether and 2-(dimethylamino)ethyl methacrylate. The synthesis steps of the shape memory polymer are simplified, the preparation method is simple, and the production cost is low. In addition, the shape memory polymer prepared in the present invention has excellent shape memory performance and high hydrophilicity and biocompatibility, and is suitable for preparing biomedical materials in the field of biomedical science.

Abstract: The present invention relates to methods for synthesizing shape memory polyurethanes, and fibers therefrom. The polyurethanes can be synthesized via solution polymerization or bulk polymerization. Following synthesis, the polyurethanes can be treated via wet spinning, dry spinning, reaction spinning, melt spinning, or electro spinning.