Preparation of needled nonwoven enhanced silica aerogel for thermal insulation

Hu, Jiali; Qian, Ying; Liu, Tongjuan; Wu, Tingxuan; Zhang, Guangyu; Zhang, Wei

doi:10.1016/j.csite.2023.103025

Cited by 10 publications

(1 citation statement)

References 45 publications

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“…As one of the effective ways to solve this problem, Silica aerogel incorporated Cementitious composites (AICs) formed by incorporating silica aerogel into cement-based materials have received extensive attention due to their excellent properties [6][7][8][9]. Due to the extremely low thermal conductivity and density of silica aerogels [10][11][12][13], the addition of cement-based AICs composites can signi cantly improve the thermal insulation performance of buildings [14][15][16][17], and also help to reduce the overall structural burden [18]. These advantages make AICs composites play an important role in improving building energy e ciency.…”

Section: Introductionmentioning

confidence: 99%

Insight into pore size distribution and moisture migration behavior in aerogel cementitious composites using BET-MIP and LF-NMR methods

Yang,

Huang,

Feng

et al. 2024

Preprint

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The durability of cementitious composites is closely related to their internal pore distribution and moisture migration patterns. In this study, low-field nuclear magnetic resonance (LF-NMR), specific surface area and porosity test (BET) and mercury intrusion porosimetry (MIP) techniques were used to compare and analyze the effects of different SiO2 aerogel contents on the pore size distribution, pore water content distribution and internal water transport of Silica aerogel incorporated Cementitious composites (AICs). The results show that with the increase of aerogel content, the pore structure of AICs has changed, and the pore connectivity has been enhanced. Compared with AIC0, the porosity of AIC10 increased by 11.89%. BET-MIP combined characterization method and LF-NMR method showed consistency in analyzing the change trend of pore size distribution of AICs, showing a trend of increasing the proportion of macroporous pore volume, thereby accelerating the water transport rate and reducing the durability of the material. In addition, during the water absorption process, the water distribution inside the material is uneven, and the area with low water content shows a cold tone in the spatial imaging.

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