52results about How to "Achieving superhydrophobicity" patented technology

The invention discloses a superhydrophobic geopolymer prepared by microporous foaming, which comprises the following raw materials in parts by weight: 30-45 parts of silicon-aluminum mineral raw materials, 35-50 parts of alkali activator, polydimethylsilane 0.5-1.5 parts of oxane, 0.05-0.15 parts of silane coupling agent, 2-5 parts of silicon carbide powder, 2-4 parts of short fiber, 1-3 parts of alkyl glycoside, and 1-3 parts of hydrogen peroxide. The invention also discloses a preparation method of the superhydrophobic geopolymer prepared by microcellular foaming. The present invention utilizes the blocking effect of short fibers on air bubbles, and the properties of silicon carbide powder and its inherent impurities silicon element and carbon element reacting in a strong alkali environment to generate gas to realize a large number of uniform microbubble pore structures with adjustable pore diameters; Superhydrophobic modification is carried out from the internal structure of the material to avoid the performance being affected by mechanical damage, so that the material has a durable hydrophobic ability; to prepare low-density, high-strength, corrosion-resistant and high-temperature foamed materials, while hydrophobic and impermeable, can be used To filter adsorption, thermal insulation, foundation treatment, structure filling.

The invention relates to full-surface super-hydrophobic anti-freezing wood and a manufacturing method thereof. The preparation method comprises the following steps: partially removing lignin and hemicellulose to form spongy wood, injecting hydrophobic nanoparticles and perfluorosilane into the outer surface and internal pores of the spongy wood through an absorption-extrusion process, and finally,carrying out hot-pressing densification treatment to obtain the super-hydrophobic anti-freezing high-strength wood. The super-hydrophobic anti-freezing high-strength wood disclosed by the invention is densified full-surface hydrophobic wood; the densification means that the wooden pipeline and the porous wooden cell wall partially collapse, so that the thickness of the wood is reduced to 30-40% of the initial thickness, and the density is increased by 2.5-3 times; wherein the full-surface hydrophobicity refers to the synergistic hydrophobicity of the outer surface of the wood and the inner surface of the pore passage of the wood. According to the anti-freezing high-strength wood, the bending strength is improved by 2-4 times compared with logs made of the same material; after 10 times offreezing and thawing cycles and 50 times of freezing and thawing cycles respectively, the bending strength is kept at 80% or above and 50% or above respectively; and the dimensional stability is stillmaintained even after 50 times of freezing and thawing cycles.