6results about How to "Not brittle" patented technology

The invention relates to the technical field of fabrics, in particular to an aerogel chemical fiber cotton fabric production process which comprises the following steps: (1) washing and drying a chemical fiber cotton fabric, and then performing normal-pressure dielectric barrier discharge plasma modification treatment to obtain a modified chemical fiber cotton fabric; (2) adding water into the nano silicon dioxide aerogel powder, stirring and performing ultrasonic treatment while adding water to obtain a nano silicon dioxide aerogel aqueous solution, and continuously adding waterborne polyurethane glue and a coupling agent while stirring and performing ultrasonic treatment to obtain nano silicon dioxide aerogel finishing glue; (3) immersing the modified chemical fiber cotton fabric into the nano silicon dioxide aerogel finishing glue, and rolling and drying to obtain the aerogel chemical fiber cotton fabric. A layer of aerogel covering body is formed on the fiber surface of the chemical fiber cotton fabric, so that the chemical fiber cotton fabric with multiple effects of heat preservation, flame retardance and hydrophobicity is obtained.

This invention belongs to the field of coating technology and provides a wear-resistant coating for drone shells and its preparation method. The raw materials of the coating include: hydrogenated bisphenol A epoxy resin, vinyl-terminated fluorinated polybutadiene resin, core-shell powder, aluminum borate nanofibers, polyetherimide micro powder, wear-resistant additives, silane coupling agent KH-792, light stabilizer, leveling agent and environmentally friendly solvent. The preparation method includes: (1) mixing hydrogenated bisphenol A epoxy resin and vinyl-terminated fluorinated polybutadiene resin to form a resin matrix; (2) first adding core-shell powder and aluminum borate nanofibers to the resin matrix for dispersion; after cooling to 25-30℃, adding other raw materials, stirring and defoaming to obtain the finished product. This coating has high wear resistance, wind and sand erosion resistance, low temperature crack resistance, microcrack self-repair, strong UV aging resistance and high adhesion, which can significantly improve the long-term service stability and service life of drone shells in complex and harsh environments such as high altitude, wind and sand, high and low temperature alternation, and strong ultraviolet radiation.

The application relates to the technical field of sealing rings, and particularly discloses a low-temperature-resistant and plasma-resistant combined sealing ring and a preparation method thereof. The combined sealing ring comprises a low-temperature-resistant rubber inner core and a corrosion-resistant rubber outer layer, the corrosion-resistant rubber outer layer is fully coated on the surface of the low-temperature-resistant rubber inner core, the glass transition temperature of the low-temperature-resistant rubber inner core is lower than-40 DEG C, the inner and outer cross section height ratio and the outer layer thickness are constrained to meet the sealing requirement of the application scene, the inner core is separately formed first, then the outer layer is injection molded and co-vulcanized with the inner core, and finally the obtained combined sealing ring not only has excellent low-temperature-resistant and plasma-resistant capacity, but also can maintain a relatively long service life in the low-temperature-normal-temperature cycle.

The application relates to the technical field of fireproof materials, in particular to a flame-retardant ABS composition and a preparation method thereof; the flame-retardant ABS composition comprises the following components in parts by weight: ABS particles 1000-1400 parts, polysiloxane 350-450 parts, dimethyl silicone oil 100-200 parts, a flame retardant 300-600 parts, inorganic fillers 100-300 parts, a crosslinking agent 5-40 parts, a coupling agent 2-20 parts, a catalyst 0.5-2 parts and an intumescent agent 1-2 parts; the ABS particles in the composition serve as the only hard aggregate, have high size consistency and the same density, and are not prone to sedimentation; the ABS particles are light and rigid, are not prone to brittle fracture after being extruded, and have flame-retardant properties; when being pushed to an ignition point, the ABS particles can cover the fire source together with the gel, so that the purpose of blocking combustion is achieved.

The application provides a TiAl alloy rich in large-size alpha2 phase twins, in particular, second-type twins, which contains 34-36 at.% of Al, 7-8 at.% of Nb, and the balance of Ti and inevitable impurities. The application also provides a method for preparing the TiAl alloy rich in large-size alpha2 phase second-type twins, which comprises the following steps: melting the alloy by a vacuum arc furnace to obtain a cast ingot, carrying out homogenization treatment at 1200 DEG C for 9-12 hours, and then quenching after being kept at 900-1000 DEG C for 3-6 hours to obtain the TiAl alloy rich in large-size alpha2 phase second-type twins. A large number of second-type twins with large size can be generated in the alloy, which provides suitable research materials for the research on deformation twins, solves the problem that the deformation twins are difficult to be characterized and researched, and provides a basis for further strengthening of the alloy performance.

The application relates to the technical field of plastics, in particular to a preparation method and application of low-temperature-resistant degradable plastics. The low-temperature-resistant degradable plastics contain, in parts by weight, carboxylated polycaprolactone C-PCL: 80-90 parts, modified lignin: 15-20 parts, nano-cellulose: 5-10 parts, crosslinking agent: 2-3 parts, and antioxidant: 0.3-0.5 parts. The modified lignin is prepared by grafting epoxy groups after the alkaline lignin is protected by p-benzene dicarboxaldehyde and hydroxylated; the crosslinking agent is prepared by condensation reaction of vanillin and hexanediamine, and the imine bond contained in the crosslinking agent endows the material with a good degradation rate under acidic conditions. The low-temperature-resistant degradable plastics prepared by the application have good low-temperature mechanical properties and excellent degradation speed under acidic conditions in the case of guaranteeing a certain service life, and are suitable for application to agricultural mulching films in cold environments.