摘要
对氮化硼纳米片(BNNS)作为填料提高聚合物的抗原子氧腐蚀性能进行了实验研究.利用液相剥离在聚乙烯醇(PVA)水溶液中制备了稳定分散的BNNS,采用基于离心技术的尺寸筛选方法,获得了具有3种不同横向尺寸的BNNS,其平均面积分别约为21.4,4.1,1.0μm2.采用浇注法,将PVA/BNNS分散液原位复合成复合薄膜.原子氧腐蚀实验表明:3种BNNS均能提高PVA的抗原子氧腐蚀性能,添加约1.0 wt%的BNNS(平均面积为21.4μm2)可使质量损失降低87%.BNNS对原子氧的成键和壁垒效应,是其提高抗原子氧腐蚀性能的主要原因.
The application of boron nitride nanosheets (BNNS) as fillers to enhance the polymer' s atomoxygen corrosion resistance was investigated. Stable BNNS dispersions in polyvinylalcohol (PVA) solutions were prepared by liquid-phase exfoliation. By using a centrifugation-based size-select route, BNNS with three kinds of different lateral sizes were obtained. Their average area was about 21.4, 4.1, 1.0 μm^2, respectively. The PVA/BNNS composite films were prepared by casting the PVA/BNNS dispersions. Atom-oxygen corrosion experiments indicate that all these BNNSs can enhance the atom-oxygen corrosion resistance of PVA. An addition of 1.0wt% BNNS (21.4 μm^2) can lead to a reduction of 87% in PVA's mass loss. It is suggested that the bonding and barrier effects between atom oxygen and BNNS are responsible for the enhanced atomoxygen corrosion resistance.
出处
《北京航空航天大学学报》
EI
CAS
CSCD
北大核心
2015年第8期1499-1504,共6页
Journal of Beijing University of Aeronautics and Astronautics
基金
北航博士研究生创新基金(YWF14YJSY052)
高等学校博士学科点专项科研基金(20131102110016)
北京市教委共建项目
关键词
氮化硼纳米片
原子氧
腐蚀
填料
聚合物
boron nitride nanosheets
atom oxygen
corrosion
filler
polymer