4results about How to "Solve white pollution" patented technology

The present application relates to the technical field of compound synthesis, and in particular to a preparation method of amino acid-based lactam, comprising: A) reacting an alpha-amino acid and an alpha-hydroxy acid ester in a first solvent under the action of a first catalyst to obtain N-(hydroxyacyl)-amino acid ester; B) reacting the N-(hydroxyacyl)-amino acid ester in a second solvent under the action of a second catalyst to obtain amino acid-based lactam with a structure shown in Formula I; in Formula I, R1 and R2 are independently selected from one of hydrogen, a C1-C4 straight-chain or branched-chain aliphatic hydrocarbon group, a substituted or unsubstituted C6-C30 aryl group, a protected amino group, a protected carboxyl group, a protected hydroxyl group and a protected sulfydryl group; and the protecting group is one of an alkoxycarbonyl group, an acyl group and an alkyl group. The present application can solve the problems in the existing lactam synthesis process, such as high raw material risk, complicated process, and difficult product purification.

The utility model discloses a kind of degradable foamed plastic buffering packaging inner holder, it is related to packaging inner holder technical field, including inner lining body, the outside fixed connection of inner lining body has packaging shell, positioning hole is equidistantly opened between inner lining body and the inside of packaging shell, the inside of inner lining body and packaging shell is respectively by base material layer, pressure-resistant layer, buffer layer and waterproof protective layer jointly composed, base material layer is arranged in the bottom, pressure-resistant layer is arranged in the top of base material layer, buffer layer is arranged in the top of pressure-resistant layer, waterproof protective layer is arranged in the top of buffer layer.The utility model discloses a kind of degradable foamed plastic buffering packaging inner holder, the base material layer of inner holder uses polylactic acid, pressure-resistant layer uses polypropylene, waterproof protective layer uses polyurethane, these materials are not only degradable, reduce environmental pollution, also give tray good pressure resistance, waterproofness and overall stability respectively, protect egg from being damaged.

The utility model relates to agricultural mulching film technical field, specifically disclose a kind of waterborne ultrathin type expanded steel structure fireproof paint preparation device, including mulching film ontology, the mulching film ontology is the multilayer composite structure including upper surface layer, intermediate core layer and lower surface layer;The intermediate core layer is made of full biodegradable high molecular matrix;The upper surface layer and lower surface layer structure are same and inside are uniformly dispersed and are provided with insect repellent microcapsule, by multilayer composite structure integration degradable material and insect repellent function, effectively avoid the white pollution problem of traditional mulching film, reduce the chemical pesticide usage amount, reduce farmland management cost, simultaneously utilize microcapsule slow-release technology to extend the insect repellent action period, improve the ecological security of crop growth environment, with green agricultural development direction, with remarkable environmental benefits and popularization and application value.

The invention relates to the technical field of preparation of auxiliary tools for flower arrangement, and discloses a preparation method of a novel scatter for flower arrangement, which comprises the following steps: mixing under the conditions of preset temperature and rotating speed to form a uniform and compact base material mixture; covering the surface layer of the base material mixture with a layer of glass fiber gridding cloth with the same specification, applying pre-pressure and maintaining the pressure, so that the base material mixture is tightly attached to the two layers of glass fiber gridding cloth to form a composite green body; setting after gradient heating, pressurizing, preheating and exhausting, cooling to room temperature, and demolding to obtain the flower arrangement scatter matrix. The bamboo fiber powder and other natural plant fibers are compounded with the silane coupling agent modified bentonite and the corn starch adhesive, traditional metal, plastic and foam raw materials are abandoned, the problems of white pollution and resource waste are solved from the source, and therefore the compactness and water-resistant toughness of the base material are improved; the defects that a single plant fiber is prone to water absorption, softening and cracking are effectively overcome, and the environment-friendly property and the practical durability are both considered.