Interpenetrated Multinetwork Hybrid Aerogels by Layered Montmorillonite and One-Dimensional Hydroxyapatite Fibers for Heat and Fire Insulation,ACS Applied Materials & Interfaces

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Interpenetrated Multinetwork Hybrid Aerogels by Layered Montmorillonite and One-Dimensional Hydroxyapatite Fibers for Heat and Fire Insulation
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2024-07-22 , DOI: 10.1021/acsami.4c08796
Yang Chen ₁ , Wei Guo _{2,

3} , Shudong Zhang _{2,

3} , Jixiang Zhang _{2,

3,

4} , Huan Xu _{2,

3,

5} , Nian Li _{2,

3} , Xiaolin Meng _{2,

3,

4} , Min Xi _{2,

3} , Cui Liu _{2,

3} , Zhenyang Wang _{2,

3}

Affiliation

It is of practical significance to develop aerogels with effective thermal insulation characteristics together with fireproof properties as well as high mechanical strength. Here, an interpenetrated multinetwork hybrid aerogel realizing thermal insulation, flame retardancy, and high compression modulus is demonstrated. Specifically, one-dimensional hydroxyapatite nanowires (HAP) played dual roles as the aerogel support skeleton to entangle with layered montmorillonite (MMT) each other to form a three-dimensional interpenetrated multinetwork structure and to optimize the thermal conductivity by adjusting the pore space in current HAP/MMT/PVA hybrid aerogels. Therefore, the interpenetrated multinetwork hybrid aerogels exhibit superior thermal insulation performance in room temperature (0.033 W m^–1 K^–1, 298 K, air conditions) and largely enhanced ultrahigh compression modulus (80 MPa). Moreover, the obtained hybrid aerogels also exhibit excellent flame retardancy and self-extinguishing smoke suppression properties (peak heat release rate and total smoke production as low as 92.44 kW m^–2 and 0.1 m², respectively), which is the outstanding interpenetrated multinetwork hybrid aerogel that has achieved synergistic improvement in heat and fire insulation and mechanical performance. Therefore, the interpenetrated multinetwork hybrid aerogels are promising candidates for efficient heat insulation, fire prevention, and mechanically robust applications.

中文翻译：

用于隔热和防火的层状蒙脱土和一维羟基磷灰石纤维互穿多网络混合气凝胶

开发具有有效隔热特性、防火性能以及高机械强度的气凝胶具有实际意义。在这里，展示了一种具有隔热、阻燃和高压缩模量的互穿多网络混合气凝胶。具体而言，一维羟基磷灰石纳米线（HAP）发挥气凝胶支撑骨架的双重作用，与层状蒙脱土（MMT）相互缠绕形成三维互穿多重网络结构，并通过调节电流的孔隙空间来优化导热系数HAP/MMT/PVA 混合气凝胶。因此，互穿多网络混合气凝胶在室温（0.033 W m ^–1 K ^–1，298 K，空气条件）下表现出优异的隔热性能，并大大提高了超高压缩模量（80 MPa）。此外，所得杂化气凝胶还表现出优异的阻燃性和自熄抑烟性能（峰值放热率和总产烟量分别低至92.44 kW·m ^–2和0.1 m ² ），是优异的互穿多网络杂化气凝胶。气凝胶在隔热、防火和机械性能方面实现了协同提升。因此，互穿多网络混合气凝胶是高效隔热、防火和机械坚固应用的有希望的候选者。

更新日期：2024-07-22

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