摘要
用三种硅烷偶联剂KH550、KH560和KH570分别处理玄武岩纤维(BF),以未经偶联剂处理的BF为对照组。X射线电子能谱(XPS)分析三种偶联剂对BF的改性,发现BF表面的Si元素与偶联剂中的Si元素形成了Si—O—Si键,其含量顺序为KH550>KH570>KH560。测定了不同方法处理后的BF增强环氧树脂(BF/EP)复合材料水浴前后的弯曲性能和层间剪切强度(ILSS),同时用SEM观察了BF/EP水浴前后的断裂面微观形貌,结果发现水浴前三种偶联剂处理BF后都能提高BF/EP的界面粘结性能,提高效果为KH550>KH560>KH570,试样破坏时界面无脱粘,主要发生的是基体破坏,界面力学性能优于基体力学性能;水浴处理后,不同BF/EP的力学性能下降程度不同,耐水性较差,试样断裂面呈脆性断裂,界面脱粘,部分纤维被拔出后在基体中留下空洞。
The basalt fiber（BF）was treated using three coupling agents（KH550,KH560 and KH570）,and the comparisons were taken with BF without any treatment.XPS results show that silicon on the surfaces of BF reacts with the silicon on the three coupling agents to form Si—O—Si bonds,and the order of amount is KH550KH570KH560.The results from the bending performance and interlaminar shear strength（ILSS）as well as the SEM observations of different BF/EP before and after water bathing show that the treatments of BF with coupling agents can improve the interface bonding properties of BF/EP with the order of KH550KH560KH570.SEM observations show that BF and epoxy combined tightly after the treatment by coupling agents,and the interface do not debond when specimen was damaged.The main damage occurs in the matrix,which shows the mechanical properties of the interface are better than that of matrix.The mechanical properties of different BF/EP decline after water bathing,and water resistance is poor.The interface of fiber and matrix debonds,and some fibers are pulled out from the matrix and holes were left in the matrix.The failure mode is a brittle fracture.
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2011年第4期99-106,共8页
Acta Materiae Compositae Sinica
基金
国家"十一五"林业科技支撑项目(2006BAD18B0705)
关键词
BF/EP
硅烷偶联剂
界面理论
界面性能
复合机制
BF/EP
silane coupling agents
interface theory
interface properties
interface mechanism
