本工作采用混合强酸H2SO4:HNO3(V:V)=3:1活化多壁碳纳米管,结合超声分散技术,利用溶液浇铸法制备多壁碳纳米管(MWCNT)和聚羟基丁酸戊酸酯(PHBV)复合材料.场发射扫描电镜观察MWCNT和MWCNT/PHBV的表面形貌,DSC和XRD研究了PHBV的结晶热力学行为.酸化处理后的碳纳米管长径比变小,粒径趋于均匀,可以比较均匀地分散在PHBV中.DSC和XRD结果显示,碳纳米管在PHBV结晶过程中起异相成核作用,加入碳纳米管后,PHBV的晶型不发生改变,MWCNT/PHBV的结晶温度和结晶焓升高,结晶速率和热稳定性提高.
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