文章摘要
聚丙烯/氧化石墨烯复合材料的制备,结构及性能
Preparation,Structure and performances of polypropylene/graphene oxide composites
投稿时间:2018-07-01  修订日期:2018-09-28
DOI:
中文关键词: 氧化石墨烯  聚丙烯  复合材料  力学性能  耐热性能
英文关键词: Graphene oxide  polypropylene resin  composites  mechanical properties  heat-resistant quality
基金项目:国家自然科学基金面上项目(21276152);陕西省科技统筹项目(2016KTCL01-14)
作者单位E-mail
吕生华 陕西科技大学 lvsh@sust.edu.cn 
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中文摘要:
      以石墨、浓硫酸、高锰酸钾和双氧水等为原料 通过Hummers法制备了氧化石墨烯(GO)分散液,对其冷冻干燥得到了GO粉体,将GO粉体与熔融聚丙烯(PP)树脂共混制备了PP/GO复合材料,采用FTIR、AFM、TEM、XRD、DSC及导热仪和氧指数测定仪等 ,对GO及PP/GO复合材料的结构和性能进行了表征。结果表明,GO能够以双片层均匀地分散在PP基体中,GO/PP复合材料具有致密均匀的微观结构,其力学性能、耐热、阻燃和热传导等性能比对照样品 (单纯PP树脂)有显著的提高。当GO掺量为0.4%时,PP/GO复合材料的拉伸强度、弯曲强度和冲击强度比对照样分别提高了29.6%、33.6%和62.7%,熔点从154.5 ℃提高为174.2 ℃,热导率提升了205.3%,极限氧指数从18.0提高到了27.6。GO的掺入提高了PP的性能和扩大了其应用领域。
英文摘要:
      Graphite oxide (GO) dispersion liquid was prepared with graphite, concentrated sulfuric acid, potassium permanganate and hydrogen peroxide as main raw materials and by Hummers method. Then GO powder was obtained by freeze drying of GO dispersion liquid. The polypropylene (PP)/GO composites were prepared by mixing of melt PP and GO powder. The microstructure and performances of GO and PP/GO composites were characterized using various testing methods such as FTIR, AFM, TEM, XRD, DSC and conductometer as well as oxygen index determinator. The results indicated that the GO can uniformly distribute in the PP matrix with double layers result in forming compact and even microstructure in PP/GO composites. The mechanical properties, heat-resistant property, flame resistance and thermal conductiveof PP/GO composites have a significant improving compared with the control sample (pure PP resin). When GO dosage is 0.4% by PP mass, the tensile strength, flexural strength and impact strength of the GO/PP composites have an increase rate of 29.6%, 33.6% and 62.7% compared with the control sample, respectively. Meanwhile, its melting point increase to 174.2℃ from 154.5℃, and its thermal conductivity has an increase rate of 205.3%, and the limiting oxygen index increase to 27.6 from 18. The research results indicated that the performances and application fields of PP will be improved by forming composites with GO nanosheets.
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