7results about How to "Biodegradable" patented technology

This invention relates to the field of polymer foaming materials technology, and discloses a plant fiber composite nucleating agent for microfoaming of biodegradable materials and its application. The plant fiber composite nucleating agent is made from raw materials comprising the following parts by weight: 80-95 parts of primary ultrafine plant fiber powder, 5-20 parts of surface modifier, and 0.1-5 parts of dispersing lubricating wax; the surface modifier and dispersing lubricating wax are coated on the surface of the primary ultrafine plant fiber powder. The application steps are as follows: adding the plant fiber composite nucleating agent to a biodegradable material matrix to obtain a pre-foaming blend, introducing foaming gas or adding a chemical foaming agent for foaming treatment. The nucleating agent of this invention improves the compatibility between plant fibers and hydrophobic biodegradable matrices, provides heterogeneous nucleation sites in the matrix while increasing the polymer melt strength, inhibits cell coalescence and rupture, and obtains microfoamed materials with uniform pore size. Furthermore, the nucleating agent itself is completely biodegradable.

This invention discloses a green, low-consumption, high-performance radiative cooling material, comprising the following components by mass percentage: 40%~60% bio-based composite matrix, 20%~35% green inorganic radiative cooling filler, 1%~3% bio-based dispersant, 2%~5% bio-based crosslinking agent, 15%~30% deionized water, and 0.5%~2% bio-based additives. The bio-based matrix and green inorganic filler achieve high performance with a solar reflectivity ≥95% and an atmospheric window emissivity ≥96%. The solvent-free material selection eliminates the need for high-temperature calcination during preparation and application, achieving the green goals of no high temperature, no organic solvents, and biodegradability, making it suitable for environmentally friendly applications.

This invention discloses an oil-resistant, high-temperature, fast-dissolving, edible packaging film and its preparation method, belonging to the field of biodegradable polymer materials technology. By mass percentage, the raw materials for preparing this oil-resistant, high-temperature, fast-dissolving, edible packaging film include 0.5-5.0% hydroxypropyl methylcellulose, 0.1-1.5% sorbitol, 1.0-9.0% gelling agent, 0.05-1.0% coagulant, and the balance being water. The gelling agent comprises carrageenan, low-acyl gellan gum, and xanthan gum in a mass ratio of 1:0.1-0.3:0.01-0.05, with the mass ratio of hydroxypropyl methylcellulose to xanthan gum being 1:0.01-0.1. This invention rationally combines three gelling components with different properties, along with hydroxypropyl methylcellulose and sorbitol, to achieve good mechanical properties and oxygen barrier properties, while also achieving high-temperature fast dissolution and oil resistance.

The application of PCE-11 as a modifier in the flotation separation of brucite and serpentine relates to the field of brucite beneficiation and purification technology. This invention provides a flotation separation method for brucite and serpentine using PCE-11 as a modifier. By introducing PCE-11, the difference in floatability between brucite and serpentine during flotation is amplified, achieving effective separation of brucite and the gangue mineral serpentine. This invention has advantages such as high efficiency, low cost, no pollution, and simple process.

This invention relates to the field of water pollution control materials technology, specifically disclosing a method for preparing a quaternary ammonium salt modified starch-chitoxin composite gel. First, chitoxin powder is added to a green solvent to obtain a chitoxin solution. Then, a quaternary ammonium salt modified starch dispersion is added to obtain a chitoxin composite solution containing quaternary ammonium salt modified starch. Next, repeated freeze-thaw cycles are performed to obtain a viscous composite. A crosslinking agent is added dropwise to the composite to obtain a crosslinking gel precursor. Finally, the crosslinking gel precursor is soaked in alcohol and washed until neutral to obtain the quaternary ammonium salt modified starch-chitoxin composite gel. The green solvent is a urea-water system of NaOH, KOH, or LiOH; the crosslinking agent is epichlorohydrin or epichlorohydrin. The application of the quaternary ammonium salt modified starch-chitoxin composite gel in the removal of micro / nanoplastics from water is also disclosed. This invention aims to solve the problems of complex synthesis processes, high production costs, and easy secondary pollution associated with existing micro / nanoplastics adsorbent materials.

This invention discloses a preservation film, preservation device, and preservation method for edible fungi. The film includes a preservation film substrate in which phosphorescent materials are dispersed. The phosphorescent materials emit light with wavelengths of 470-580 nm under ultraviolet light excitation. The ultraviolet-phosphorescent dual-effect preservation film constructed by this invention can continuously release room-temperature phosphorescence after short-term ultraviolet excitation, achieving a low-energy, intermittent, and long-lasting dual-preservation light response, avoiding tissue damage and accelerated water loss caused by prolonged direct UV irradiation. Furthermore, the composite material used is biodegradable, low-cost, and environmentally friendly.

The application discloses a lithium battery diaphragm with a warning function, which is a sandwich structure of three or more layers of nanofibers, and comprises a pure film and a conductive composite layer with a warning function in the middle. The application also includes adding functional materials to the lithium battery diaphragm with a warning function, so that the diaphragm has a composite function other than the warning function, for example, adding a flame-retardant coating to make the diaphragm have a flame-retardant function in addition to the warning function. The lithium battery diaphragm provided by the application not only has the characteristics of a natural three-dimensional nanometer network structure, good thermal stability, high liquid absorption rate, high ion conductivity and the like compared with traditional commercial polyolefin diaphragms, but also has unique warning and optional flame-retardant functions, which greatly ensures the safety of lithium batteries.