摘要
以六氟丙烯(C3F6)为反应气体,通过等离子体激发使聚丙烯(PP)微粉表面氟化,并以此为原料采用热极化驻极制备了氟化改性PP驻极体。使用红外光谱、能谱分析、扫描电镜、差示扫描量热分析、X射线衍射、接触角测试仪及振动式电容静电计对氟化改性PP驻极体进行了表征,研究了氟化改性对其驻极性能的影响。研究结果表明,低温六氟丙烯等离子体处理PP微粉接枝了六氟丙烯;等离子处理后的PP微粉疏水性提高,水接触角最大为126°;在功率400 W下,随着等离子体处理时间的延长,氟化改性PP微粉表面氟含量先增大后减小;处理15 min时,表面氟含量达到最大值0.88%;驻极电压一定时,氟含量越高驻极体的初始表面电位越大,且储存电荷能力提高;等离子体氟化改性对PP结晶行为没有明显影响;热极化驻极由于存在外电场作用力,驻极体的熔融峰值增大约8℃;氟化改性PP驻极体对大肠杆菌有良好的抑菌活性。
Focused on hexafluoropropylene which was used as reaction gas to fluorinate the surface of PP powders through plasma excitation,and the fluorinated modified PP electret was prepared by thermally polarized electret.FT-IR,EDS,SEM,DSC,XRD,contact angle tester and vibrating capacitance electrometer were used to characterize the electret of the fluorinated modified PP,and the influence of fluorinated modification on its electret performance was studied.The results show that the low-temperature hexafluoropropylene plasma treatment of PP micropowder is grafted with hexafluoropropylene;the hydrophobicity after plasma treatment is improved,and the maximum water contact angle is 126°;under the condition of 400 W,with the increase of plasma treatment time,the surface fluorine content first increases and then decreases.When treated for 15 min,the surface fluorine content reaches the maximum value of 0.88%;when the electret voltage is constant,the higher the surface fluorine content,the greater the initial surface potential of the electret and the higher the charge storage capacity.Plasma fluorination has no significant effect on the crystallization behavior;the melting peak of the electret is increased by about 8℃due to the external electric field force.Fluorinated PP electrets show a good antibacterial activity against Escherichia coli.
作者
刘凯玥
王华山
欧阳宇飞
Kaiyue Liu;Huashan Wang;Yufei Ouyang(School of Chemical Engineering and Materials,Tianjin University of Science and Technology,Tianjin 300457,China)
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2021年第9期149-156,共8页
Polymer Materials Science & Engineering
基金
国家科技支撑计划(2015BAK45B01)。
关键词
聚丙烯
等离子体
氟化改性
驻极体
驻极性能
polypropylene
plasma
fluoride modification
electret
electret performance
