二次掺杂制备聚苯胺/石墨烯/碳纳米管复合材料及其防腐性能  

Preparation and Anti-Corrosion Properties of Polyaniline/Graphene/Carbon Nanotube Composites by Secondary Doping

作　　者：李昱锋 孔明洁 李斌[2] 杨小刚[1] Yufeng Li;Mingjie Kong;Bin Li;Xiaogang Yang(College of Environment and Safety Engineering,Qingdao University of Science and Technology;College of Materials Science and Engineering,Qingdao University of Science and Technology,Qingdao 266042,China)

机构地区：[1]青岛科技大学环境与安全工程学院 [2]青岛科技大学材料科学与工程学院,山东青岛266042

出　　处：《高分子材料科学与工程》2023年第8期81-90,共10页Polymer Materials Science & Engineering

基　　金：国家自然科学基金资助项目(41106070)。

摘　　要：在高氯酸体系中通过原位聚合将苯胺(ANI)单体分别与还原氧化石墨烯(RGO)、碳纳米管(CNTs)制备了一次掺杂态产物PANI/RGO和PANI/CNTs,产物分别经氨水解掺杂后,在高氯酸体系中经二次掺杂制备得到二次掺杂态聚苯胺/石墨烯/碳纳米管(Redoped PANI/RGO/CNTs)复合材料。通过扫描电镜、透射电镜、傅里叶变换红外光谱和紫外光谱对其不同产物形貌和结构进行表征,通过电化学工作站测试了不同产物在3.5%NaCl溶液的防腐蚀性能。结果表明,在RGO与ANI质量比为1:20、CNTs与ANI质量比为1:20时,二次掺杂态产物中聚苯胺纳米纤维可分别在RGO和CNTs上均匀生长并形成网状结构,纤维长度达到850 nm,形貌均一,其防腐蚀性能最优异,缓蚀效率可达81.79%。通过二次掺杂将PANI/RGO和PANI/CNTs复合制备Redoped PANI/RGO/CNTs材料,可有效避免石墨烯和碳纳米管在制备复合材料过程中的团聚,得到结构规整、防腐性能更优异的复合材料。In perchloric acid system,the primary doped state products polyaniline/reduced graphene oxide and polyaniline/carbon nanotubes were prepared with ANI monomer,reduced graphene oxide and carbon nanotubes by in situ polymerization method.After dedoping with ammonia,redoped polyaniline/reduced graphene oxide/carbon nanotubes composite materials were synthetized in perchloric acid system.The morphology and structure of different products were characterized by SEM,TEM,FT-IR and UV-Vis.The corrosion resistance properties of different products were tested in 3.5%NaCl solution through electrochemical workstation.The results show that polyaniline nanofibers can form network structure with reduced graphene oxide and carbon nanotubes in redoped products with the mass ratio of reduced graphene oxide to ANI 1:20 and the mass ratio of carbon nanotubes to ANI 1:20,which has the best anticorrosion property and the inhibition efficiency can reach 81.79%.By secondary doping,the redoped polyaniline/reduced graphene oxide/carbon nanotubes materials were compounded with polyaniline/reduced graphene oxide and polyaniline/carbon nanotubes.It can avoid agglomeration in the primary doping process effectively and can obtain the composite materials with regular structure and better anticorrosion performance.

关 键 词：高氯酸 还原氧化石墨烯 碳纳米管 聚苯胺 电化学 掺杂 

分 类 号：TB332[一般工业技术—材料科学与工程]