文章摘要
过氧化氢氧化制备羧基再生亚麻纤维素及其膨胀阻燃环氧树脂
Preparation of Carboxyl Reproducible Linen by Hydrogen Peroxide and Its Application in the Flame Retardant Performance of Epoxy Resin
  
DOI:10.16865/j.cnki.1000-7555.2017.08.024
中文关键词: 氧化亚麻纤维  环氧树脂  阻燃  成炭剂
英文关键词: oxidized reproducible linen  epoxy resin  flame retardant  carbonization agent
基金项目:国家自然科学基金资助项目(U1333126,U1633102)
作者单位
彭华乔1,殷 悦2,刘 放2,张水洞2,李 林1 1.中国民航局第二研究所,四川 成都 610041; 2. 华南理工大学 机械与汽车工程学院,广东 广州 510640 
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中文摘要:
      采用过氧化氢制备羧基再生亚麻纤维素,通过红外光谱、核磁共振、X射线衍射和热重分析表征产物的结构与性能,研究表明再生亚麻纤维素上的C6伯羟基被选择性地氧化为羧基,而且氧化再生亚麻纤维素随着羧基含量的增加,其热稳定性下降。将其作为成炭剂,并与酸源、气源复配组成膨胀型阻燃剂(IFR)用于阻燃环氧树脂,通过极限氧指数测试(LOI)和垂直燃烧测试(UL-94)表征阻燃性能。研究表明,膨胀型阻燃剂的加入能有效地提高环氧树脂的阻燃性能。与EP/MFAPP/PER复合材料的LOI相比,EP/MFAPP/OLF27.4 和EP/MFAPP/OLF34.5 复合材料的LOI更高,MFAPP/OLF体系的阻燃效果比MFAPP/PER体系要好,这是因为MFAPP/OLF体系的催化成炭效果更好,样品表面生成的防护性炭层,起到了阻隔热量和氧气的作用并抑制了可燃性气体的释放。
英文摘要:
      Oxidized reproducible linen (OLF) was successfully prepared with H2O2 depending on the mole ratios of H2O2/reproducible linen. The structure and performance of OLF were investigated by FT-IR, 13C-NMR, XRD, TG and TG-FTIR. The primary hydroxyl on C6 of reproducible linen was changed into carboxyl by oxidation reaction; and the thermal stability of OLF decreases with the incensement of carboxyl content. Furthermore, the effect of OLF as carbonization agent combination with acid source and gas source on flame retardancy of epoxy resin was researched by LOI and UL-94 test. Results show that the flame retardancy of epoxy resin is significantly improved by incorporating of the intumescent flame retardant (IFR) containing OLF. EP/MFAPP/OLF27.4 and EP/MFAPP/OLF34.5 have the higher LOI value than EP/MFAPP/PER due to the efficiency char produced by EP/MFAPP/OLF. The heat and oxygen are isolated, and the flammable gas is controlled not to release by the char.
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