36results about How to "Make up for performance deficiencies" patented technology

The invention discloses a preparation method of a comb-like structure organosilicon-polyurethane copolymer, which is to prefabricate single-end polyhydroxyl-terminated phenyl-modified polysiloxane and amino-terminated polysiloxane, and then use polyisocyanate React with polyols and the above two modified polysiloxanes successively, and then undergo chain extension to obtain a comb-shaped structure silicone-polyurethane copolymer. The polymer prepared by the present invention has the advantages of both polyurethane and polysiloxane. On the one hand, it has good mechanical and physical properties such as cohesiveness, adhesion, wear resistance, and extensibility, so that the overall material can be well applied to various Surface and interface occasions; on the other hand, it strengthens the thermal stability and weather resistance of the polymer as a whole, expands the application range of the product, and makes it have excellent application prospects in the fields of mold release agents, coatings, and sealants.

The invention discloses a preparation method and application method of TEMPO nanocellulose-polyacrylic acid gel. The preparation method comprises the following steps: a. preparing TEMPO nanocellulose suspension; b. preparing carbon nanomaterial dispersion; c. TEMPO The nanocellulose suspension is mixed with the carbon nanomaterial dispersion, added to the polyacrylic acid aqueous solution, added with a crosslinking agent, and stirred until a gel is formed to obtain a carbon nanotube-TEMPO nanocellulose-polyacrylic acid gel. The present invention introduces the concept of biology into polymer materials to form an intelligent material with self-healing properties, prolongs the service life of the material, and restores and retains its original characteristics. And in some applications, it can avoid damage caused by the accumulation of cracks and improve the safety of materials.

The invention relates to a water-absorbent resin and a preparation method thereof, comprising the following steps: a. Fine powder granulation: mixing the water-absorbent resin micropowder prepared by the aqueous solution polymerization and the reversed-phase suspension polymerization process with lignocellulose in a certain proportion, adding to remove Ionized water and co-swelling agent make it swell evenly and form hydrogel particles; b. Drying: drying the hydrogel particles prepared in step a to a moisture content of less than 3%; c. The dried particles are ground and screened to obtain the original powder with a particle size distribution of 150-850 microns; d. Surface cross-linking: evenly spray the surface cross-linking treatment solution on the original powder obtained in step c, and the finished product can be obtained after heat treatment. The water-absorbent resin prepared by the invention has special morphology and excellent comprehensive performance, and has high diffusion, high pressure, high absorption speed and high water retention, and effectively recycles micropowder, reduces dust pollution and reduces production. cost.

The invention belongs to the field of composite materials, and concretely relates to a nano-hydroxyapatite / carboxymethyl chitosan / poly(lactic-co-glycolic acid) micro-nano hybrid drug-loaded scaffold and a bionic preparation method thereof. The three-dimensional bionic hybrid drug-loaded scaffold is prepared through combining solvent evaporation and freeze drying technologies by using a high speed emulsifying machine via adopting nano-hydroxyapatite and carboxymethyl chitosan as a water phase and an emulsion continuous phase, adopting a methylene chloride solution of poly(lactic-co-glycolic acid) as an oil phase and an emulsion dispersion phase, using glutaraldehyde as a cross-linking agent to immobilize the carboxymethyl chitosan in the continuous phase and adopting the main component icariin in a traditional Chinese medicine epimeddium as a carrier drug. The preparation method has the advantages of simple preparation process and mild reaction conditions, and the obtained scaffold overcomes the performance defects of single natural polymer materials or synthetic polymer materials, has the advantages of intercommunicated pores, uniform pore diameter, figurability, slow drug release, good bone bonding ability and good biocompatibility, and is expected to become a new osteoporosis treatment composite material.

The invention discloses a preparation method of cerium and praseodymium stabilized zirconia polishing powder. The preparation method comprises the following steps: mixing zirconium carbonate, cerium carbonate, praseodymium carbonate and a hydrochloric acid solution to obtain a mixed solution; adding an alkaline solution into the mixed solution in a stirring state, and carrying out a precipitation reaction to obtain alkaline zirconium carbonate cerium and praseodymium coprecipitation; and carrying out first roasting, smashing and second roasting in sequence on the alkaline zirconium carbonate cerium and praseodymium coprecipitation so as to obtain the cerium and praseodymium stabilized zirconia polishing powder. The two elements of cerium and praseodymium are doped into the zirconia polishing powder, and the polishing powder obtained through first roasting, smashing and second roasting has relatively high removing rate and relatively low micro scratch level, so that the polishing performance of the polishing powder is improved, and the requirements for high-precision and large-diameter optical glass lenses in the market are met.

The invention provides a biological ink, a preparation method and application thereof, an abdominal wall repair patch bracket and a preparation method thereof, and belongs to the technical field of tissue engineering. The biological ink of the present invention includes polymer, a solvent capable of dissolving the polymer and aloe vera powder; the polymer includes thermoplastic polyurethane, polylactic acid or polycaprolactone. The bio-ink of the present invention contains polymers, which have good mechanical properties and biocompatibility. By adding aloe vera powder, not only the biocompatibility of the bio-ink can be improved, but also various anti-inflammatory properties contained in aloe vera can be fully utilized. The regeneration-promoting ingredients can effectively prevent wound inflammation and infection, improve the growth and reproduction ability of damaged cells, increase the antibacterial and growth-promoting ability of bio-ink, and make up for the performance defects of existing single-material bio-ink. The biological ink of the present invention is used to prepare biological scaffolds, and the obtained biological scaffolds have good mechanical properties, biocompatibility and biological regeneration.

The invention discloses a custom multimedia file playback engine, which is mainly composed of a master controller, a framer, a loader, a time driver, a resource stack unit, a parser, an audio controller, and a rendering controller. On the basis of the playback engine, a custom multimedia file playback method is disclosed, including two types of starting playback, dragging, and resuming playback. The present invention can play self-defined multimedia files, and the multimedia courseware does not exceed 3M in 5 minutes. In Internet applications, multimedia file transmission has a new breakthrough in the bottleneck caused by bandwidth. When playing, it is necessary to combine headers and content to play. Therefore, it has the security of content copyright and the convenience of distributed deployment, filling the gap in the market.