2results about How to "Solve temperature resistance" patented technology

Belonging to the technical field of high temperature resistant composite aerogel, the invention provides a bicontinuous network composite aerogel with large length-diameter ratio shell-core structure in-situ embedded porous silicon carbide foam, which comprises a shell-core structure and a skeleton, the shell-core structure comprises an inner core and a shell layer, the shell layer is of a ceramic silicone rubber layer structure, and the inner core is a SiC nanowire of a continuous network structure; the framework is porous silicon carbide foam with a continuous network structure; wherein the core-shell structure is embedded on the skeleton structure in situ to form an interspersed bicontinuous network composite structure. The invention also provides a preparation method, according to the method, by precisely designing the mechanical distribution of the nanowires, the ceramic skeleton and the porous structure on the coupling characteristic, the multifunctionality, energy absorption and high temperature resistance of the composite aerogel are synergistically optimized, and the composite aerogel has remarkable advantages in the aspects of regulation and control of sound waves, electromagnetic waves and light waves, high-temperature oxidation resistance and vibration resistance. Therefore, the composite material has wide application potential in the fields of aerospace, military protection, electronic equipment, building shock insulation and the like.

This invention discloses a base liquid-type temperature-controlled viscosity-changing diverting agent and its preparation method, belonging to the field of oil and gas extraction technology. The temperature-controlled viscosity-changing diverting agent comprises the following components by mass fraction: 25%–30% cationic monomer, 1%–2.5% acrylamide, 1%–2% vinylpyrrolidone, 0.08%–0.1% initiator, 1%–2% chain transfer inhibitor, 20%–25% white oil, 2%–4% emulsifier, and the remainder being water; wherein the cationic monomer is one or more of trimethylaminopropylmethacrylamide chloride and acryloyloxyethyltrimethylammonium chloride. The temperature-controlled viscosity-changing diverting agent provided by this invention, through the synergistic compounding of the above components, can be used to formulate diverting acids for acidizing, effectively solving the problems of limited temperature resistance and adaptability of existing conventional diverting acid systems, and the low dispensing efficiency of conventional temperature-controlled viscosity-changing thickeners. In acidizing operations, it effectively improves the viscosity-changing diverting capability of the acid system and enhances the effectiveness of the measures.