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A platform for research: civil engineering, architecture and urbanism
PU sponge-based silica aerogel felt and preparation method thereof
The invention relates to the technical field of thermal insulation materials, in particular to a PU sponge-based silica aerogel felt and a preparation method thereof. The preparation method of the PU sponge-based silica aerogel felt provided by the invention comprises the following steps: uniformly mixing siloxane, orthosilicate, water and absolute ethyl alcohol, then sequentially adding acetic acid and hexadecyl trimethyl ammonium bromide, and carrying out a heating reaction to obtain a silicon source hydrolysate; adding an alkali catalyst into the silicon source hydrolysate, and fully and uniformly stirring to obtain a silicon dioxide sol solution; immersing PU sponge into the silicon dioxide sol solution for gum dipping treatment, and then standing and aging at normal temperature to obtain a PU sponge/silica aerogel composite material; adding the PU sponge/silica aerogel composite material into absolute ethyl alcohol for solvent replacement; and drying the PU sponge/silica aerogel composite material subjected to solvent replacement to obtain the PU sponge-based silica aerogel felt. The PU sponge-based silica aerogel felt prepared by the invention has good flexibility, rebound resilience and excellent heat insulation and heat preservation performance.
本申请涉及保温材料技术领域，特别涉及一种PU海绵基硅气凝胶毡及其制备方法。本申请提供的PU海绵基硅气凝胶毡的制备方法包括以下步骤：将硅氧烷、正硅酸酯、水和无水乙醇混合均匀，之后依次加入醋酸和十六烷基三甲基溴化铵进行加热反应，得到硅源水解液；向硅源水解液中加入碱催化剂，充分搅拌均匀，得到二氧化硅溶胶液；将PU海绵浸入二氧化硅溶胶液中进行浸胶处理，之后在常温条件下静止老化，得到PU海绵/硅气凝胶复合材料；将PU海绵/硅气凝胶复合材料加入无水乙醇中进行溶剂置换；对完成溶剂置换的PU海绵/硅气凝胶复合材料进行干燥，即得到PU海绵基硅气凝胶毡。本申请制得的PU海绵基硅气凝胶毡兼具良好的柔性、回弹性和极好的隔热保温性能。
PU sponge-based silica aerogel felt and preparation method thereof
The invention relates to the technical field of thermal insulation materials, in particular to a PU sponge-based silica aerogel felt and a preparation method thereof. The preparation method of the PU sponge-based silica aerogel felt provided by the invention comprises the following steps: uniformly mixing siloxane, orthosilicate, water and absolute ethyl alcohol, then sequentially adding acetic acid and hexadecyl trimethyl ammonium bromide, and carrying out a heating reaction to obtain a silicon source hydrolysate; adding an alkali catalyst into the silicon source hydrolysate, and fully and uniformly stirring to obtain a silicon dioxide sol solution; immersing PU sponge into the silicon dioxide sol solution for gum dipping treatment, and then standing and aging at normal temperature to obtain a PU sponge/silica aerogel composite material; adding the PU sponge/silica aerogel composite material into absolute ethyl alcohol for solvent replacement; and drying the PU sponge/silica aerogel composite material subjected to solvent replacement to obtain the PU sponge-based silica aerogel felt. The PU sponge-based silica aerogel felt prepared by the invention has good flexibility, rebound resilience and excellent heat insulation and heat preservation performance.
本申请涉及保温材料技术领域，特别涉及一种PU海绵基硅气凝胶毡及其制备方法。本申请提供的PU海绵基硅气凝胶毡的制备方法包括以下步骤：将硅氧烷、正硅酸酯、水和无水乙醇混合均匀，之后依次加入醋酸和十六烷基三甲基溴化铵进行加热反应，得到硅源水解液；向硅源水解液中加入碱催化剂，充分搅拌均匀，得到二氧化硅溶胶液；将PU海绵浸入二氧化硅溶胶液中进行浸胶处理，之后在常温条件下静止老化，得到PU海绵/硅气凝胶复合材料；将PU海绵/硅气凝胶复合材料加入无水乙醇中进行溶剂置换；对完成溶剂置换的PU海绵/硅气凝胶复合材料进行干燥，即得到PU海绵基硅气凝胶毡。本申请制得的PU海绵基硅气凝胶毡兼具良好的柔性、回弹性和极好的隔热保温性能。
PU sponge-based silica aerogel felt and preparation method thereof
一种PU海绵基硅气凝胶毡及其制备方法
HE RUI (author) / YU XUEFENG (author) / KANG YIHONG (author) / XIONG XIAOMAN (author) / ZHANG XIN (author) / ZHENG KE (author)
2023-06-02
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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