6results about How to "Good form stability" patented technology

The application relates to the technical field of grass-proof cloth processing, in particular to a degradable and long-service-life grass-proof cloth and a preparation method thereof, which is prepared from the following raw materials in percentage by weight: 50-70% of polylactic acid, 1-3% of a modifier, 0.5-1% of a plasticizer, 2-5% of a monoacylglyceride, 5-10% of starch, and the rest of porous fillers, wherein the modifier is obtained by mixing fatty acid polyoxyethylene ester, sulfonated lignin salt and hydroxyethyl methacrylate. The grass-proof cloth prepared through the above-mentioned formula has excellent degradability, strong mechanical properties and weather resistance, so that the grass-proof cloth can maintain stable performance for a long time, thereby prolonging the service life.

The present application relates to the field of daily chemical technology, and especially relates to a breakable sunscreen condensation bead composition and a preparation method and application thereof. The composition has independent granular shape and is transformed from granular shape into continuous phase emulsion under external force, and the composition comprises (A) a gel skeleton component containing two or more than two hydrophilic polymer materials with different rheological behaviors; (B) a sunscreen active component containing one or more than one organic sunscreen agent and / or inorganic sunscreen agent; (C) an oil phase and an emulsifier for forming an emulsified internal phase embedding the sunscreen active component; (D) an efficacy composition. Compared with the prior art, the present application realizes the structural expression of a high sunscreen load system by forming a three-dimensional weak cross-linked gel network cooperatively formed by multiple hydrophilic polymers, combining an oil phase emulsified internal core and a surface structure regulation component, so that the composition has a stable condensation bead shape in a storage state, can be broken and release the internal emulsified phase under external force, and thus realizes rapid spreading.

This invention provides a method for mutagenesis of *Aspergillus cristatus* and its application, belonging to the field of microbial technology. The mutagenesis method provided by this invention includes the following steps: first, pretreating *Aspergillus cristatus* suspension by mixing it with a compound enzyme solution; then culturing the pretreated *Aspergillus cristatus* in a culture medium supplemented with a mutagen; the compound enzyme solution consists of a cell-lysing enzyme solution and a β-glucanase solution; the mutagen includes ethyl methanesulfonate and / or diethyl sulfate. This invention can improve the efficiency of the mutagen entering the bacterial cells, thereby enhancing the mutagenesis effect; the mutant strains obtained by mutagenesis, compared to the original strain, exhibit more vigorous colony growth on plates, larger average diameter, denser hyphae, and / or better morphological stability. Furthermore, it can achieve ideal mutagenic selection pressure at lower mutagen concentrations and shorter treatment times, reducing sublethal damage, which is beneficial for the recovery and screening of mutant strains and improving the efficiency of mutagenesis experiments.

The invention relates to a high-foaming-rate and high-stability fully-degradable biomass-based foaming material which is prepared by taking PLLA, PDLA, biopolyester, microcrystalline cellulose and surface epoxy grafted carbon nanotubes as main raw materials, and promoting comprehensive regulation and control of melt characteristics and crystallization characteristics through free radical reaction crosslinking and chain extension between matrixes and a stereocomplex. A two-stage melt conveying and extrusion continuous supercritical foaming process is adopted to realize a high-density closed-cell foam structure with high foaming ratio and bimodal pore size distribution of the foam, and the foam has high foaming ratio, high strength and toughness, excellent form stability and low thermal conductivity, can be fully degraded, and can be applied to the light-weight buffer fields of packaging, industry, building and the like.

The invention relates to the technical field of cloth drying, in particular to drying equipment for textile cloth, which comprises a drying seat and a sealing cover for forming a drying space, and a cloth conveying structure arranged in the sealing cover, and is characterized by further comprising a hot air supply structure, a hot air recovery structure and a pulse generation mechanism, the cloth conveying structure comprises a conveying wheel used for pulling cloth and an auxiliary wheel used for guiding the cloth. The hot air supply structure comprises a hot air pipe and an air outlet; the air outlet faces the upper surface of the cloth; the hot air recovery structure comprises a recovery seat, a through groove is formed in the side, facing the upper surface of the cloth, of the recovery seat, and a pulse air pipe facing the lower surface of the cloth is arranged at the bottom; the pulse generating mechanism comprises a piston assembly which can be arranged in the recovery seat in a reciprocating motion manner, and a driving assembly for driving the piston assembly to move; the textile cloth drying device can achieve the purpose of improving the textile cloth drying efficiency.

The invention discloses a preparation method of a PAN-based solid-solid phase change material, which comprises the following steps: step 1, uniformly mixing acrylonitrile and phase change monomers, and heating until all the monomers are completely molten to form a uniform liquid system; adding an emulsifier, a chain transfer agent and deionized water into the liquid system, and completely emulsifying all monomers to obtain a stable emulsion system; step 2, placing the emulsion system in an oxygen-free environment, and adding an initiator solution for free radical polymerization reaction to obtain a polymerized emulsion system; step 3, adding the polymerized emulsion system into the salting-out agent solution, and standing to form a polymer precipitate; and washing the polymer precipitate to remove unreacted monomers and impurities, and drying to remove moisture, thereby obtaining the PAN-based solid-solid phase change material. According to the invention, PAN is taken as a main chain, a side chain with a phase change function is introduced through free radical copolymerization, and a brand-new polymer type phase change energy storage material is constructed.