摘要
介绍一种以天然杨木为原料制备而成的纤维素/SiO_(2)复合微管(CSCM)隔热材料。杨木经化学处理后获得具有丰富孔洞结构的纤维素微管,再经过SiO_(2)气凝胶前驱体溶液吸附润湿后,微管表面均匀覆盖一层致密的凝胶壳层。实验结果表明,经化学处理的纤维素微管仍保持完整的中空管状结构,直径约为8μm,孔径总体积和比表面积分别为0.0081 cm^(3)/g和4.9 m^(2)/g。通过研究不同体积分数正硅酸四乙酯(TEOS)的纤维素微管隔热材料发现,随着TEOS体积分数的增加,纤维素微管的机械性能显著增强,当体积分数为16.7%时,隔热材料的最大屈服强度和最低导热系数分别为130.8 kPa和0.026 W/(m·K),表现出优异的机械性能和隔热性能。
The paper introduces a thermal insulation material composed of cellulose/SiO_(2)composite microtubes(CSCM),which are fabricated using natural poplar wood as the raw material.Through chemical treatment,cellulose microtubes with a rich porous structure are obtained from the poplar wood.After adsorption and wetting with a SiO_(2)aerogel precursor solution,the microtubes are uniformly coated with a dense gel shell on their surface.The results showed that the chemically treated cellulose microtubes retain their intact hollow tubular structure,with a diameter of 8μm.The total pore volume and specific surface area were 0.0081 cm^(3)/g and 4.9 m^(2)/g,respectively.By studying cellulose microtube thermal insulation materials with different volume fraction of tetraethyl orthosilicate(TEOS),it was found that as the TEOS volume fraction increased,the mechanical properties of the cellulose microtubes were significantly enhanced.When the volume fraction reaches 16.7%,the material exhibits a maximum yield strength of 130.8 kPa and a minimum thermal conductivity of 0.026 W/(m·K),demonstrating excellent mechanical performance and thermal insulation properties.
作者
王宣
WANG Xuan(School of Engineering,Anhui Audit College,Anhui Hefei 230601,China)
出处
《齐齐哈尔大学学报(自然科学版)》
2026年第2期73-78,86,共7页
Journal of Qiqihar University(Natural Science Edition)
关键词
隔热材料
纤维素
复合微管
thermal insulation materials
cellulose
composite microtubules
