Carbon-Sequestration Straw Cellulose-Aerogel Gradient Thermal Insulation Material
Carbon-Sequestration Straw Cellulose-Aerogel Gradient Thermal Insulation Material
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DOI：
10.1021/acsaenm.3c00664
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发表时间：
2024-01
期刊：
影响因子：
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通讯作者：
Arpita Sarkar;Pratyush Kumar Singh;Long Zhu;D. Faghihi;Shenqiang Ren
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作者：
Arpita Sarkar;Pratyush Kumar Singh;Long Zhu;D. Faghihi;Shenqiang Ren
绿色超级隔热材料对于净零可持续建筑围护结构至关重要。实现这种潜力对于同时实现碳封存和超级绝缘性能是必不可少的。在这里，我们报告的合成水玻璃基二氧化硅气凝胶表现出的热导率为17.2 mW/m·K和92%的高孔隙率。我们使用碳封存小麦秸秆纤维来创建梯度纤维素-气凝胶复合材料，以提高机械稳定性。所制备的梯度复合材料的热导率为27.1 mW/m·K，弯曲模量为824 MPa，同时具有超疏水性（水接触角为135.4°），可用于开发绿色建筑保温材料。
Green superinsulation materials are essential for net-zero sustainable building envelopes. Realizing such potential is indispensable for simultaneously achieving carbon-sequestration and superinsulation performance. Here, we report the synthesis of a water glass-based silica aerogel exhibiting a thermal conductivity of 17.2 mW/m·K and a high porosity of 92%. We used carbon-sequestration wheat straw fiber to create a gradient cellulose-aerogel composite to improve mechanical stability. The as-prepared gradient composite exhibits a thermal conductivity of 27.1 mW/m·K and a flexural modulus of 824 MPa, while exhibiting superhydrophobicity (water contact angle of 135.4°) for the development of green building insulation materials.