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首页> 外文期刊>Journal of Applied Polymer Science >In situ co-polymerization of high-performance polybenzoxazine/silica aerogels for flame-retardancy and thermal insulation
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In situ co-polymerization of high-performance polybenzoxazine/silica aerogels for flame-retardancy and thermal insulation

机译：原位共聚高性能聚苯单苯嗪/二氧化硅气凝胶，用于阻燃和保温

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摘要

Materials with high-performance thermal insulation and excellent flame-resistance are incredibly desirable for energy conservation and fire safety. In this study, a novel hybrid nanostructure network polybenzoxazine/silica (PBO/SiO2) aerogels were fabricated through facile in situ co-polymerization sol-gel methods with ambient pressure drying using benzoxazine (BO) monomers and SiO2 sol as reaction source, N, N-dimethylformamide (DMF) as the solvent and hydrochloric acid (HCl) as the catalyst. The hybrid nanostructure network was retained by polymerization-induced nanoscale phase separation of PBO and SiO2. The resulting PBO/SiO2 aerogels exhibited finer microstructure, lower density (0.18 g/cm(3)), thermal conductivity (0.031 W/m center dot K), and better flame-resistance in comparison with PBO aerogels. They demonstrated an excellent compressive strength of 0.81 to 1.12 MPa at 10% deformation. The remarkable improvement in thermal insulation and flame-resistance of PBO/SiO2 aerogels could be attributed to the combined effects of finer microstructure and formation of SiO2 that was "in-situ" interpenetrated and interacted with silanols (Si-OH) in the PBO network during the combustion process. The successful synthesis of PBO/SiO2 aerogels highlights the possibility of fabricating a novel high-performance thermal insulation and excellent flame-resistance used for energy-efficient buildings.
机译：高性能隔热材料和优异的阻燃性是节能和消防安全的理想材料。本研究以苯并恶嗪（BO）单体和SiO2溶胶为反应源，N，N-二甲基甲酰胺（DMF）为溶剂，盐酸（HCl）为催化剂，采用简易的原位共聚合溶胶-凝胶法，在常压干燥条件下制备了新型杂化纳米结构网络聚苯并恶嗪/二氧化硅（PBO/SiO2）气凝胶。聚合诱导PBO和SiO2的纳米级相分离保留了杂化纳米结构网络。与PBO气凝胶相比，所得PBO/SiO2气凝胶具有更精细的微观结构、更低的密度（0.18 g/cm（3））、导热性（0.031 W/m中心点K）和更好的阻燃性。它们在10%变形下表现出了0.81至1.12 MPa的优异抗压强度。PBO/SiO2气凝胶的隔热性和阻燃性的显著改善可归因于更精细的微观结构和在燃烧过程中“原位”相互渗透并与PBO网络中的硅醇（Si-OH）相互作用的SiO2形成的综合效应。PBO/SiO2气凝胶的成功合成突显了制造新型高性能隔热材料和用于节能建筑的优良阻燃性的可能性。

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  • 来源
    《Journal of Applied Polymer Science》 |2021年第18期|共14页
  • 作者

    Xiao Yunyun; Li Liangjun; Cai Huafei; Liu Fengqi; Zhang Sizhao; Feng Junzong; Jiang Yonggang; Feng Jian;

  • 作者单位

    Natl Univ Def Technol Coll Aerosp Sci &

    Technol Sci &

    Technol Adv Ceram Fibers &

    Composites Lab Changsha Peoples R China;

    Natl Univ Def Technol Coll Aerosp Sci &

    Technol Sci &

    Technol Adv Ceram Fibers &

    Composites Lab Changsha Peoples R China;

    Natl Univ Def Technol Coll Aerosp Sci &

    Technol Sci &

    Technol Adv Ceram Fibers &

    Composites Lab Changsha Peoples R China;

    Natl Univ Def Technol Coll Aerosp Sci &

    Technol Sci &

    Technol Adv Ceram Fibers &

    Composites Lab Changsha Peoples R China;

    Jiangxi Univ Sci &

    Technol China Australia Int Inst Mineral Met &

    Mat Nanchang Jiangxi Peoples R China;

    Natl Univ Def Technol Coll Aerosp Sci &

    Technol Sci &

    Technol Adv Ceram Fibers &

    Composites Lab Changsha Peoples R China;

    Natl Univ Def Technol Coll Aerosp Sci &

    Technol Sci &

    Technol Adv Ceram Fibers &

    Composites Lab Changsha Peoples R China;

    Natl Univ Def Technol Coll Aerosp Sci &

    Technol Sci &

    Technol Adv Ceram Fibers &

    Composites Lab Changsha Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 高分子化合物工业（高聚物工业）;
  • 关键词

    flame retardance; nanostructured polymers; porous materials; thermal properties; ringamp; 8208; opening polymerization;

    机译：阻燃性;纳米结构聚合物;多孔材料;热性能;环＆amp;8208;开口聚合;

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