利用硅烷偶联剂(APTES)对氧化石墨烯(GO)进行功能化改性,在不同的试验条件下制备了3种硅烷偶联剂功能化GO(APTES-g-GO)纳米填料,并经熔融共混制备了APTES-g-GO填充改性的聚苯乙烯(PS)复合材料.为了改善复合材料的界面作用,采用马来酸酐接枝乙烯-辛烯共聚物(POE-g-MAH)为增容剂.分别采用FT-IR、XRD、TG、SEM以及拉伸和冲击测试对填料和纳米APTES-g-GO/POE-g-MAH/PS复合材料的结构和性能进行了表征和测试.结果表明:APTES已成功接枝于GO的表面上.接枝过程中,APTES对GO有一定的剥离和还原作用.随着填料含量的增加,纳米APTES-g-GO/POE-g-MAH/PS复合材料拉伸强度和冲击强度均先上升后下降.当填料与基体质量比为0.75％时,3种复合材料的拉伸强度和冲击强度都达到最大值,其中纳米AS-GO/POE-g-MAH/PS复合材料的综合性能最好,其拉伸强度和冲击强度比POE-g-MAH/PS分别提高了19％和31％.共混过程中,APTES-g-GO与POE-g-MAH之间的反应改善了纳米APTES-g-GO/POE-g-MAH/PS复合材料的界面相互作用.APTES-g-GO均匀分散于复合材料中,它的加入提高了复合材料的热稳定性能.添加AS-GO填料的复合材料热稳定性能提高最为明显,含0.75％ AS-GO的纳米AS-GO/POE-g-MAH/PS复合材料的最大失重温度比POE-g-MAH/PS提高了7℃.
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