本文已被:浏览 1985次 下载 1703次
中文摘要: 以过硫酸铵和过硫酸钾为引发剂,在碱性环境下进行纤维素与己内酰胺的接枝共聚反应。采用红外光谱仪(FT-IR)、扫描电子显微镜(SEM)及X射线衍射仪(XRD)对接枝共聚物的分子结构、表观形貌和结晶性进行了表征。通过单因素实验重点考察了单体用量、引发剂浓度、反应温度和反应时间等对接枝共聚物接枝率的影响。结果表明:以3 g纤维素为原料,当单体与原料质量比为1∶1、引发剂浓度为0.2 mol/L、反应温度30 °C、反应时间75 min时,接枝率最高可达57%。由XRD衍射图谱可知,接枝反应发生在纤维素的无定形区,没有破坏原纤维素的结晶结构。
Abstract:The copolymerization of caprolactam(CPL) onto cellulose using potassium persulfate and ammonium persulfate as reaction initiator was studied. The molecular structure, morphology and crystallinity of graft copolymer were characterized using infrared spectrometer (FT-IR),scanning electron microscope (SEM) and X ray diffractometer (XRD). Effects of various reaction parameters on grafting ratio, such as mass of monomer,concentration of initiator, reaction time and reaction temperature were evaluated. Results show that the optimum conditions are as follows: the mass ratio of monomer to cellulose 1∶1, initiator concentration 0.2 mol/L, reaction temperature 30 °C, reaction time 75 min. The grafting ratio reached 57% under the optimum conditions. The grafting occurs mainly on the surface and within the amorphous region of the cellulose, and the crystallinity is not destroyed.
keywords: cellulose graft copolymerization caprolactam
文章编号: 中图分类号: 文献标志码:
基金项目:山西省国际科技合作项目(2007081029;2009081046)
作者 | 单位 | |
刘治国 | 太原理工大学材料科学与工程学院,太原 030024 | ailuo_bae@yahoo.com.cn |
高晓月 | 太原理工大学材料科学与工程学院,太原 030025 | |
王淑花 | 太原理工大学材料科学与工程学院,太原 030026 | |
贾虎生 | 太原理工大学材料科学与工程学院,太原 030027 | jia_husheng@126.com |
引用本文:
刘治国,高晓月,王淑花,贾虎生.纤维素与己内酰胺的接枝共聚反应[J].功能高分子学报,2011,24(1):.
LIU Zhi-guo,GAO Xiao-yue,WANG Shu-hua,JIA Hu-sheng.Graft Copolymerization of Caprolactam on Cellulose[J].Journal of Functional Polymers,2011,24(1):.
刘治国,高晓月,王淑花,贾虎生.纤维素与己内酰胺的接枝共聚反应[J].功能高分子学报,2011,24(1):.
LIU Zhi-guo,GAO Xiao-yue,WANG Shu-hua,JIA Hu-sheng.Graft Copolymerization of Caprolactam on Cellulose[J].Journal of Functional Polymers,2011,24(1):.