摘要
采用硅烷偶联剂KH-570对羟基磷灰石(HAp)进行改性,通过紫外光接枝法制备聚丙烯腈/改性羟基磷灰石(PAN/MHAp)-KH570接枝复合膜和复合纤维。通过正交优化分析得到具备良好吸附和拉伸性能的接枝复合膜的HAp改性工艺为:偶联剂KH-570体积分数5%、乙醇与水体积比9∶1、水解时间1 h、pH值6、偶联时间30 min、偶联温度50℃、蒸干温度50℃。采用此工艺得到的接枝复合膜的拉伸断裂强度为0.847 MPa,对Cd2+的吸附量为82.54 mg/g;复合纤维的断裂强度为3.198 cN/dtex,对Cd2+的吸附量为86.2 mg/g。通过单因素分析得到PAN/MHAp-KH570接枝复合膜的最佳接枝时间为8 min,光引发剂最佳用量为9%(对MHAp质量分数)。PAN/MHAp-KH570接枝复合纤维的拉伸断裂强度大于共混复合纤维,而吸附量略小于共混复合纤维。
Polyacrylonitrile(PAN)/modified hydroxyapatite(MHAp) grafted composite film and fiber were prepared via UV initialted photografting and the hydroxyapatite(HAp) in composite materials was modified by KH-570.The modified process of HAp in PAN/MHAp-KH570 photografting composite film with good adsorption and tensile properties was discussed by orthogonal experimental method.The optimum modified process of HAp-KH570 are coupling agent KH-570 volume fraction of 5%,volume ratio of ethanol/water of 9∶1,hydrolysis time of 1 h,pH value of 6,coupling time of 30 min,coupling temperature of 50 ℃,evaporated temperature of 50 ℃.The tensile strength of PAN/MHAp-KH570 grafted composite film and composite fiber under the optimum conditions are 0.847 MPa and 3.198 cN/dtex separately,the cadium adsorption amount is 82.54 mg/g and 86.20 mg/g individually.Through the single factor analysis,the ideal UV grafting time and initiator mass fraction of PAN/MHAp-KH570 grafted composite film are 8 min and 9%(on the weight of modified HAp).The tensile strength of PAN/MHAp photografting composite fibers is greater than blend composite fibers.The adsorption capacity is slightly less than that of blend composite fibers.
出处
《产业用纺织品》
2012年第10期17-22,共6页
Technical Textiles
基金
辽宁省教育厅重点实验室项目(2008S014)
辽宁省自然科学基金项目(20082151)
教育部留学归国人员启动基金项目(教外司留〔2009〕1001号)
关键词
聚丙烯腈
羟基磷灰石
改性
紫外光接枝
复合材料
polyacrylonitrile,hydroxyapatite,modification,UV initiated photografting,composite material
