聚亚苯基砜/石墨烯纳米复合材料的制备与性能  

Preparation and Properties of Polyphenylsulfone/Graphene Nanocomposites

作　　者：卞军[1] 何飞雄[1] 蔺海兰[1] 王刚[1] 周强[1] 李丝丝 鲁云[2] 

机构地区：[1]西华大学材料科学与工程学院特种材料及制备技术重点实验室,四川成都610039 [2]千叶大学工学研究科,日本千叶263-8522

出　　处：《高校化学工程学报》2015年第5期1229-1237,共9页Journal of Chemical Engineering of Chinese Universities

基　　金：四川省教育厅青年基金项目(11ZB005);国家级大学生创新创业训练计划项目(201410623006);特种材料及制备技术四川省高校重点实验室开放研究基金项目(szjj2015-084,szjj2015-086);西华大学“青年学者培养计划”基金项目(01201404)

摘　　要：论文通过溶液共混法制备了化学共价功能化改性石墨烯片(f GO)掺杂的聚亚苯基砜(PPSU)纳米复合材料(PPSU/f GO)以改善PPSU的力学性能、热性能和电性能。所得材料分别通过红外光谱(FT-IR)、原子力显微镜(AFM)、X射线衍射(XRD)、扫描电子显微镜(SEM)、热重分析(TGA)、力学和电学性能测试表征了化学共价功能化改性对石墨烯的影响,以及f GO的含量对PPSU/f GO纳米复合材料的力学性能、热性能、导电性能及断面形貌的影响。研究结果表明:氧化石墨烯已成功获得功能化改性,其在溶剂中能均匀分散和剥离,厚度约为70 nm左右;加入少量的f GO(如≤1%(wt)时,f GO的分散尺寸较小,在基体中分散较均匀,并与PPSU基体有良好的界面结合,可有效发挥f GO对PPSU的增强增韧作用。PPSU/f GO纳米复合材料有较好的力学性能,其中以1%(wt)的f GO含量为最佳,其纳米复合材料的拉伸强度和抗冲击强度分别为207 MPa和72 k J?m-2,比纯PPSU分别提高了约15%和14%。当f GO含量过高时,f GO分散尺寸增大,与PPSU基体界面作用减弱,导致复合材料拉伸强度和抗冲击性能下降。随着f GO含量的增加,PPSU复合材料耐热稳定性能提高。电性能测试表明,当加入1%(wt)的f GO时,复合材料的电导率提高了近8个数量级,其导电逾渗阀值小于1%(wt)。综合考虑复合材料的力学和电性能,f GO的添加量低于1%(wt)为宜。Polyphenylsulfone（PPSU） based nanocomposites filled with chemical covalently functionalized graphene oxide sheets（f GO） were prepared by solution blending in order to improve the mechanical, thermal and electrical properties of PPSU. The effects of chemical covalently functionalization on the graphene oxide sheets, as well as influences of f GO content on the mechanical, thermal properties, electroconductive properties and morphology of fractured section of PPSU/f GO nanocomposites were investigated by means of Fourier transform infrared spectroscopy（FT-IR）, Atomic force microscope（AFM）, X-ray diffraction（XRD）, Scanning electron microscope（SEM）, thermal gravimetric analysis（TGA）, mechanical and electrical conductivity tests separately. The experimental results show that graphene oxide sheets have been functionalized successfully. f GO could be dispersed and exfoliated uniformly with thickness of ~70 nm in the solvent. The incorporation of lower content of f GO（i.e, ≤1%（wt）） could form small f GO particles and well disperse in PPSU matrix with good interfacial adhesion, which leads to obvious strengthen-toughen effects of f GO to PPSU matrix. In this case, compared with pure PPSU, the PPSU/f GO nanocomposites have good mechanical properties when their f GO contents are less than 1%（wt）, and among them, the PPSU/f GO nanocomposites with 1%（wt） f GO is the best, its tensile strength and impact strength reach 207 MPa and 72 k J？m-2, which are about 15 % and 14 % higher than that of pure PPSU, respectively. When the f GO content is too high, the size of f GO particles increases and its interface adhesive with PPSU decreases, which results in the decrease of tensile and impact strengths of PPSU/f GO nanocomposites. Incorporation of f GO would improve the thermal stability of PPSU/f GO nanocomposites. The electrical property test exhibits that the electrical conductivity of PPSU improves significantly when adding 1%（wt） f GO. That is, the PPSU/f GO nanocomposite has a

关 键 词：聚亚苯基砜 石墨烯 纳米复合材料 界面 性能 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]