Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
High-uniformity nano-microporous heat insulation plate and preparation method thereof
The invention provides a high-uniformity nano-microporous heat insulation baffle and a preparation method thereof. The preparation method comprises the following steps: A), adding nano silicon dioxideinto a modifier solution, and drying after modification, to obtain modified nano silicon dioxide, wherein the modifier is polyacrylamide and/or sodium polyacrylate, and the mass concentration of themodifier solution is 0.05%-0.5%; B) stirring and mixing 80-90 parts by weight of the modified nano silicon dioxide, 8-15 parts by weight of an infrared opacifying agent and 2-5 parts by weight of inorganic fibers to obtain a mixed material; and C) carrying out compression molding on the mixed material, and calcining to obtain the high-uniformity nano-microporous heat insulation baffle. The nano silicon dioxide powder is modified in advance, so that the dispersity of the nano silicon dioxide powder is improved, the pore size distribution in the pressed nano-microporous heat insulation baffle ismore uniform, and convective heat transfer can be effectively reduced.
本发明提供了一种高度均一性纳米微孔隔热板及其制备方法，包括以下步骤：A)将纳米二氧化硅加入改性剂溶液，改性后进行干燥，得到改性纳米二氧化硅；所述改性剂为聚丙烯酰胺和/或聚丙烯酸钠；所述改性剂溶液的质量浓度为0.05～0.5％；B)以重量份数计，将80～90份改性后的纳米二氧化硅、8～15份红外遮光剂和2～5份无机纤维搅拌混合，得到混合物料；C)将所述混合物料压制成型，进行煅烧，得到高度均一性纳米微孔隔热板。本发明通过预先对纳米二氧化硅粉末改性，提高纳米二氧化硅粉末的分散性，使压制出的纳米微孔隔热板内部的孔径分布更加均匀，可有效降低对流传热。
High-uniformity nano-microporous heat insulation plate and preparation method thereof
The invention provides a high-uniformity nano-microporous heat insulation baffle and a preparation method thereof. The preparation method comprises the following steps: A), adding nano silicon dioxideinto a modifier solution, and drying after modification, to obtain modified nano silicon dioxide, wherein the modifier is polyacrylamide and/or sodium polyacrylate, and the mass concentration of themodifier solution is 0.05%-0.5%; B) stirring and mixing 80-90 parts by weight of the modified nano silicon dioxide, 8-15 parts by weight of an infrared opacifying agent and 2-5 parts by weight of inorganic fibers to obtain a mixed material; and C) carrying out compression molding on the mixed material, and calcining to obtain the high-uniformity nano-microporous heat insulation baffle. The nano silicon dioxide powder is modified in advance, so that the dispersity of the nano silicon dioxide powder is improved, the pore size distribution in the pressed nano-microporous heat insulation baffle ismore uniform, and convective heat transfer can be effectively reduced.
本发明提供了一种高度均一性纳米微孔隔热板及其制备方法，包括以下步骤：A)将纳米二氧化硅加入改性剂溶液，改性后进行干燥，得到改性纳米二氧化硅；所述改性剂为聚丙烯酰胺和/或聚丙烯酸钠；所述改性剂溶液的质量浓度为0.05～0.5％；B)以重量份数计，将80～90份改性后的纳米二氧化硅、8～15份红外遮光剂和2～5份无机纤维搅拌混合，得到混合物料；C)将所述混合物料压制成型，进行煅烧，得到高度均一性纳米微孔隔热板。本发明通过预先对纳米二氧化硅粉末改性，提高纳米二氧化硅粉末的分散性，使压制出的纳米微孔隔热板内部的孔径分布更加均匀，可有效降低对流传热。
High-uniformity nano-microporous heat insulation plate and preparation method thereof
一种高度均一性纳米微孔隔热板及其制备方法
ZHANG CHENGHE (Autor:in) / REN DAGUI (Autor:in) / LIU CHAO (Autor:in) / TANG FENG (Autor:in) / WANG CHUANZHONG (Autor:in)
17.04.2020
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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