硅烷偶联剂表面改性UHMWPE纤维的工艺优化

Optimization of surface modification process of UHMWPE fiber with silane coupling agent

以硅烷偶联剂KH-550在不同条件下处理超高相对分子质量聚乙烯(UHMWPE)纤维,采用正交实验方法,以硅烷偶联剂KH-550的浓度(A)、处理温度(B)、处理时间(C)为因素,以UHMWPE纤维的断裂强力、界面剪切强度(τ)为实验指标,研究了硅烷偶联剂KH-550处理UHMWPE纤维的最佳工艺条件。结果表明:UHMWPE纤维断裂强力的影响因素主次顺序为A,B,C,τ的影响因素主次顺序为B,A,C;硅烷偶联剂KH-550处理UHMWPE纤维的最优工艺为硅烷偶联剂KH-550质量分数17.5%,处理温度55℃,处理时间7 h,在此条件下得到的UHMWPE纤维的断裂强力为41.15 cN,断裂强力损失率为2.44%,τ为1.359MPa,τ的增加率为35.22%。

The surface modification of ultra-high relative molecular mass polyethylene（ UHMWPE） fiber was performed in presence of silane coupling agent KH-550 under different conditions. The surface modification conditions for UHMWPE fiber with silane coupling agent KH-550 were optimized by orthogonal experiment using the concentration of silane coupling agent KH-550（ A）,treatment temperature（ B） and treatment time（ C） as factors and the breaking strength and interfacial shear strength（ τ） as the experimental index. The results showed that the primary and secondary order of the factors that affected the breaking strength was A,B,C when the sequence affecting τ was B,A,C; the produced UHMWPE fiber had the breaking strength of 41. 15 cN,breaking strength loss of 2. 44%,τ of 1. 359 MPa with the growth rate of 35. 22% under the conditions as followed：17. 5% silane coupling agent KH-550 by mass fraction,treatment temperature 55 ℃ and time 7 h.