功能化石墨烯/弹性体协同强韧化聚丙烯纳米复合材料的制备和性能研究*

doi:10.11901/1005.3093.2015.434

材料研究学报

2016, Vol. 30

Issue (5): 393-400 DOI: 10.11901/1005.3093.2015.434

本期目录 | 过刊浏览

功能化石墨烯/弹性体协同强韧化聚丙烯纳米复合材料的制备和性能研究*

蔺海兰(

), 申亚军, 王正君, 周醒, 王刚, 卞军

西华大学材料科学与工程学院成都 610039

Preparation and Performance of Polypropylene Nano-composites Toughened-Reinforced Synergetically with Functionalized Graphene and Elastomer

LIN Hailan^**(

), SHEN Yajun, WANG Zhengjun, ZHOU Xing, WANG Gang, BIAN Jun

College of Materials Science and Engineering, Xi-Hua University, Chengdu 610039, China

引用本文:

蔺海兰, 申亚军, 王正君, 周醒, 王刚, 卞军. 功能化石墨烯/弹性体协同强韧化聚丙烯纳米复合材料的制备和性能研究*[J]. 材料研究学报, 2016, 30(5): 393-400.
Hailan LIN, Yajun SHEN, Zhengjun WANG, Xing ZHOU, Gang WANG, Jun BIAN. Preparation and Performance of Polypropylene Nano-composites Toughened-Reinforced Synergetically with Functionalized Graphene and Elastomer[J]. Chinese Journal of Materials Research, 2016, 30(5): 393-400.

全文: PDF(798 KB) HTML

摘要:

利用乙二胺功能化石墨烯(GS-EDA)为纳米填料, 马来酸酐接枝乙烯-辛烯共聚物(POE-g-MAH)弹性体为增韧剂, 经熔融共混法制备了PP/POE-g-MAH/GS-EDA纳米复合材料。并采用红外光谱(FTIR)、扫描电子显微镜(SEM)、示差扫描量热仪(DSC)、热失重分析(TGA)、力学性能、热变形温度和熔融指数测试分别对填料和所得纳米复合材料的结构和性能进行了测试和表征。研究表明, EDA已成功接枝于石墨烯的表面上; POE-g-MAH的酐基与GS-EDA的氨基发生了作用改善了共混体系的界面相容性并促进了GS-EDA在PP基体中的分散性。当GS-EDA含量为0.5%(质量分数)时, 复合材料的拉伸强度、弹性模量和冲击强度分别较PP/POE-g-MAH提高了25.2%、32.5%和26.9%, 此时复合材料的综合力学性能也最好。添加GS-EDA提高了复合材料的结晶温度、熔融温度和结晶度。GS-EDA的加入使PP/POE-g-MAH/GS-EDA复合材料的热稳定性提高, 而熔融指数逐渐降低。

关键词 ：复合材料, 功能化石墨烯, 聚丙烯, 力学性能, 热性能

Abstract：

Using ethylenediamine functionalized graphene (GS-EDA) as nano-filler and maleic anhydride grafted polyolefin elastomer (POE-g-MAH) as toughening agent, the PP/POE-g-MAH/GS-EDA nanocomposites were prepared by melt blending method. The morphology and properties of nano-filler and the prepared nanocomposites were characterized in detail by means of Fourier transform infrared spectroscopy (FTIR), scanning electron microscope (SEM), differential scanning calorimetric analysis (DSC), thermogravimetric analysis (TGA), mechanical properties, thermal deformation temperature and melt flow rate tests. The results indicated that EDA was successfully grafted onto GS. The reactions between the GS-EDA and POE-g-MAH could improve effectively the interfacial compatibility of blending systems and the dispersion of GS-EDA in the matrix. The tensile strength, elastic modulus and impact strength of the nanocomposites with 0.5 mass% GS-EDA increased by 25.2%, 32.5% and 26.9% respectively in comparison with those of PP/POE-g-MAH without GS-EDA. The comprehensive mechanical performance could also be acquired for the PP/POE-g-MAH/GS-EDA nanocomposite with 0.5 mass% GS-EDA. The crystalline temperature, melting temperature and the degree of crystalline of the PP/POE-g-MAH/GS-EDA composites increased due to the GS-EDA incorporation. The thermal stability of all the PP/POE-g-MAH/GS-EDA composites is improved, while the melt flow rate decreased gradually, with the addition of GS-EDA.

Key words： composite functionalized graphene polypropylene mechanical property thermal property

收稿日期: 2015-08-01

ZTFLH:

TQ325.1+4

基金资助:* 国家级大学生创新创业训练计划项目201510623033, 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和西华大学“西华杯”基金项目2015-XX资助

作者简介: 本文联系人: 蔺海兰

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图1 GO和GS-EDA的红外光谱图

图2 NGP的氧化、接枝过程、以及POE-g-MAH与GS-EDA之间的作用机制

图3 不同GS-EDA质量分数的PP/POE-g-MAH/GS-EDA复合材料力学性能 (a)拉伸强度和扯断伸长率; (b)弹性模量和冲击强度

图4 不同GS-EDA质量分数的PP/POE-g-MAH/GS-EDA复合材料的冲击断面SEM像

图5 不同GS-EDA质量分数的PP/POE-g-MAH/GS-EDA纳米复合材料的拉伸断面SEM像

图6 纯PP、PP/POE-g-MAH和GS-EDA的质量分数分别为0.5%和1%时PP/POE-g-MAH/GS-EDA复合材料的DSC升温熔融曲线(a)和降温结晶曲线(b)

图7 纯PP、PP/POE-g-MAH和PP/POE-g-MAH/GS-EDA复合材料(GS-EDA的质量分数分别为0.5%和1%)的热失重曲线: (a)-TGA; (b)-DTA

图8 不同GS-EDA质量分数的PP/POE-g-MAH/GS-EDA复合材料的熔体流动速率

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