7results about How to "Long stable time" patented technology

The invention provides a phosphonic acid ligand modified cerium oxide polishing solution and a preparation method thereof. The polishing solution is mainly prepared by mixing water and phosphonic acid ligand modified cerium oxide according to a mass ratio of (94: 5)-(92: 7). According to the polishing solution, through modification of the phosphoric acid ligand, the chemical and physical properties of the cerium oxide abrasive are optimized, and the reactivity and the removal rate in the chemical mechanical polishing process can be improved, so that the polishing efficiency is effectively improved; a stable surface modification layer is formed through interaction with the surfaces of cerium oxide particles, so that the aggregation tendency among the particles is reduced, the grinding material can be more uniformly dispersed in a solution, and the uniformity of suspension liquid is improved; hydrophilic groups are arranged on the surface, so that the solubility of the particles in a solution is improved, and the settling velocity of the particles is reduced, thereby prolonging the stabilization time of a suspension.

The invention discloses a modified polypeptide as well as a preparation method and application thereof, the preparation method comprises the following steps: on the basis of solid-phase synthesis of RADA16, 1-hydroxybenzotriazole and benzotriazole-N, N, N ', N'-tetramethylurea hexafluorophosphate are adopted as condensing agents, N, N-diisopropylethylamine-containing N, N-diisopropylethylamine is added into the condensing agents, and a reaction is carried out for 2-4 hours to obtain the modified polypeptide. And adding amino-terminated or carboxyl-terminated polyethylene glycol or amino-containing chitosan oligosaccharide into N, N-dimethylformamide for condensation, cutting polypeptide from the resin after the reaction is completed, precipitating, washing, re-dissolving and freeze-drying to obtain the polypeptide. The polypeptide provided by the invention has the characteristic of forming hydrogel through self-assembly in a specific medium, and the gel forming time of the polypeptide is within 21-60 seconds and is obviously faster than that of RADA peptide (gel forming in 150 seconds) under the same condition; the polypeptide modified by the polyethylene glycol or the chitosan oligosaccharide can spontaneously form gel after being injected into the blood vessel so as to embolize the blood vessel, and the embolism is long in stabilization time and stable, and meets the actual clinical requirements.

The invention provides a modified epoxy-cerium oxide polishing liquid and a preparation method thereof, which is mainly prepared from the following raw materials by mass percentage: 0.2%-0.5% of modified cerium oxide abrasive; 0.02%-0.35% of stabilizer; 0.25%-0.4% of ammonia water; 99.08%-99.2% of deionized water; wherein the modified cerium oxide abrasive is cerium oxide and epoxy carboxylic acid mixed in a mass ratio of (20:1)-(200:1). The epoxy-cerium oxide polishing liquid can make the abrasive more evenly dispersed in the solution, improve the uniformity of the suspension; and maintain its suspension (D50) for up to 2 months under the condition of ensuring the removal rate.

The invention discloses polymer slurry, a high-performance and high-safety lithium battery diaphragm as well as a preparation method and application of the high-performance and high-safety lithium battery diaphragm. The polymer slurry comprises a cosolvent, an additive, an aramid polymer and an organic solvent I, wherein in the synthetic raw materials of the aramid fiber polymer, the molar ratio of a phthaloyl chloride monomer to a phenylenediamine monomer is (0.8-0.99): 1. The lithium battery diaphragm comprises a base membrane and a porous aramid fiber membrane loaded on the base membrane, and the porous aramid fiber membrane is obtained by solidifying polymer slurry coated on the base membrane. The invention designs and provides the slurry containing the low-molecular-weight para-aramid nanofiber, the slurry is coated and prepared into the lithium metal battery diaphragm, and the cycle performance of the lithium metal battery can be greatly improved; and the lithium battery diaphragm prepared by the invention is relatively high in thermal stability and mechanical strength, and is beneficial to improving the safety of the lithium battery.

The invention belongs to the technical field of food processing, and particularly relates to an extraction process of turnip seed oil and an effective component composition of the turnip seed oil. The invention relates to an extraction process of turnip seed oil, which comprises the following steps: performing staged fermentation pretreatment on turnip seed broken cell walls by using a plurality of microbial strains, and then extracting grease by combining with a nano SiO2 (at) SDS composite active agent and ionic liquid synergistic ultrasonic treatment. Through staged fermentation pretreatment and the synergistic effect of the nano material and the ionic liquid, the extraction efficiency and quality of the turnip seed oil are greatly improved; firstly, cell walls and internal components are gradually degraded by utilizing aspergillus niger, aspergillus oryzae, bacillus licheniformis, lactic acid bacteria and saccharomycetes, grease is released, and the stability of the grease is improved; then, the extraction process is further optimized by a composite active agent formed by nano silicon dioxide and lauryl sodium sulfate and 1-butyl-3-methylimidazolium acetate, and the efficiency is enhanced through ultrasonic treatment;

This invention discloses an adenine-based heat stabilizer and its application in PVC composites, belonging to the field of heat stabilizer technology. The heat stabilizer is an adenine-based substance or a compound of an adenine-based substance and an auxiliary stabilizer. The adenine-based substance is adenine or adenine nucleoside, and the auxiliary stabilizer is at least one of calcium salt stabilizers, zinc salt stabilizers, and polyol stabilizers. This adenine-based heat stabilizer can improve the initial whiteness of PVC and impart better long-term stability to PVC. Its application in PVC composites can effectively improve the thermal stability and mechanical properties of PVC composites, possessing practical application value.

The application discloses a kind of sodium ion battery semi-solid reference electrode for vehicle and preparation method thereof, belong to electrode material technical field, specifically related to N-isopropyl acrylamide, acryloyloxy ethyl trimethylsilane and crosslinking agent N,N'-methylene bisacrylamide under the action of initiator, polyacryl compound is prepared, then polyacryl compound and polymer monomer, initiator are added in sodium ion liquid electrolyte, and polymeric precursor liquid is prepared, then reference electrode is prepared by the method of the application;Polyacryl compound is made of N-isopropyl acrylamide and acryloyloxy ethyl trimethylsilane.The sodium ion battery semi-solid reference electrode for vehicle prepared by the application has high potential stability, long stable time, is easy to replace, and avoids the problem of sodium dendrite.