3results about How to "Solve the precipitation problem" patented technology

This invention relates to the field of cellulose acetate (TAC) membrane technology, specifically to a cellulose acetate membrane and its preparation method. The components include a solvent and solid components, by weight, wherein the solid components include: 80-110 parts cellulose, 5-10 parts plasticizer, and 0.1-5 parts benzotriazole derivative, with the solid components comprising 10-30 wt% of the total components. The prepared TAC membrane exhibits the following characteristics: fewer than 3 precipitates on the membrane surface; after high-temperature and high-humidity aging for 1000 h, the TAC membrane has a ΔE value < 0.10, a Δtsb transmittance (380nm-550nm value) < 0.5, and the area ratio of point-like, oily, and contaminant precipitates on the membrane surface is < 1%.

The application provides an antibacterial agent and a preparation method and application thereof, the antibacterial agent comprises two different repeating units; the structural formula of the antibacterial agent is or by adopting the technical scheme of the application, the antibacterial agent prepared by adopting a copolymerization method has excellent antibacterial performance and long-acting stability, and can meet the requirement of products on long-acting antibacterial performance of the antibacterial agent.

This invention belongs to the field of polymer functional materials technology, specifically relating to a biodegradable light-converting film with intrinsic fluorescence and its applications. The biodegradable light-converting film is prepared from a biodegradable copolyester with aggregation-induced emission properties. The biodegradable copolyester is polymerized from a polymerizable monomer, a first monomer providing rigid conjugated units, and a second monomer providing flexible spacer units. In the main chain structure of the biodegradable copolyester, the longest linear spacer segment between any two adjacent rigid conjugated units derived from the first monomer has ≥10 carbon atoms. Through precise molecular structure design, the aggregation-induced emission properties are chemically bonded to the biodegradable polyester main chain, fundamentally solving the problems of easy migration, aggregation quenching, and high cost of the light-converting agent in traditional additive-type light-converting films. This light-converting film exhibits efficient and stable intrinsic fluorescence in the solid state, with tunable fluorescence color, and possesses good mechanical properties and biodegradability.