2results about How to "Less prone to defects" patented technology

This invention relates to a method for preparing a high-purity tubular silicon carbide external coating film. The external coating film is applied to the outside of single-channel or multi-channel tubular silicon carbide supports of various sizes using a negative / positive pressure coating process. The film layer consists of one or two layers. The preparation method of the film layer is as follows: First, silicon carbide powder, silicon source, pH adjuster, dispersant, and solvent are mixed to obtain a uniform and stable slurry with high solids content. Then, using a special negative / positive pressure process, the slurry is uniformly coated onto the outside of the single-channel or multi-channel tubular silicon carbide support. After drying, it has a certain strength. Finally, it is sintered under a protective atmosphere without pressure to obtain a high-purity silicon carbide external coating film that is tightly bonded to the support. This invention innovatively coats a silicon carbide membrane separation layer onto the outer wall of a support body, enabling it to process liquids with no upper limit on solid content. Furthermore, the membrane layer is tightly bonded to the support body, exhibits good erosion resistance, high filtration accuracy, good backwashing effect, and is not prone to clogging. It has broad application prospects in fields such as coal mine wastewater separation, high-viscosity industrial wastewater filtration, recovery of acid solutions containing precious metals, and purification or concentration of high-concentration slurries under harsh working conditions.

The invention relates to the technical field of elastomer materials, and discloses a composite elastomer material, a preparation method and application, the composite elastomer material comprises the following raw materials by weight: 30-60 parts of silicone rubber masterbatch, 40-70 parts of siloxane grafted POE, 0.15-0.3 part of a platinum catalyst and the like; the compatibility between POE and silicone rubber is good, the POE and the silicone rubber form a uniform dispersed phase, the advantages of a vinyl elastomer and a silicone rubber elastomer can be integrated, the composite elastomer material has higher tensile strength and elongation at break, POE is grafted with a high-temperature-resistant phenyl phthalimide ring structure, and the tensile strength of the composite elastomer material is improved. The thermal decomposition mass loss temperature of the POE and the composite elastomer material thereof is favorably improved, the heat resistance is excellent, and the material has good practical application in the aspect of automobile wire harness sheath materials.