Modified expanded perlite as well as preparation method and application thereof

• Main Authors: SUN HONGLING, CUI BIN, YIN HUILING, CHEN LIUGANG, ZHANG CHUNGUANG, ZHANG LU, MA YAN, LI JIANWEI, PAN WENJIE, SHAN XUEQIANG, ZHANG MAOLIANG, XU YUANSHENG, ZHANG HUANHUAN
• Format: Patent
• Language: Chinese; English
• Published: 22.11.2022
• Subjects: ARTIFICIAL STONE; CEMENTS; CERAMICS; CHEMISTRY; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; CONCRETE; LIME, MAGNESIA; METALLURGY; REFRACTORIES; SLAG; TREATMENT OF NATURAL STONE

The invention belongs to the technical field of thermal insulation materials, and discloses modified expanded perlite, and a preparation method of the modified expanded perlite mainly utilizes porous, multi-section and adsorption characteristics of open-cell expanded perlite, micro-nano powder is filled into pores of the expanded perlite, and part of the pores are blocked, so that the modified expanded perlite is obtained. Meanwhile, a double-layer waterproof structure is used for blocking air in open holes of the expanded perlite, and waterproof and heat insulation modification is carried out on the expanded perlite particles. The expanded perlite can be subjected to waterproof modification on the premise that the heat conductivity coefficient is not increased or even reduced, and the prepared modified expanded perlite is excellent in waterproof and heat preservation performance. In addition, the preparation method is simple, the manufacturing cost is low, and an ideal thermal insulation material can be prep