高等学校化学学报 ›› 2015, Vol. 36 ›› Issue (4): 799.doi: 10.7503/cjcu20140842

• 高分子化学 • 上一篇    下一篇

改性海藻酸钠聚集行为对电纺纳米纤维形貌的影响

高鹏博1, 冯玉红1(), 李嘉诚1(), 颜慧琼2, 黄俊浩1, 武田田1, 黄文红1   

  1. 1. 海南大学材料与化工学院, 海口 570228
    2. 海南师范大学化学化工学院, 海口 571158
  • 收稿日期:2014-09-16 出版日期:2015-04-10 发布日期:2015-03-19
  • 作者简介:联系人简介: 冯玉红, 女, 博士, 教授, 主要从事纤维素的改性和生物材料研究. E-mail: ljcfyh@263.net. 李嘉诚, 男, 博士, 教授, 主要从事胶体与界面化学研究. E-mail: lijiacheng@hainu.edu.cn
  • 基金资助:
    国家自然科学基金(批准号: 21366010)、 海南省重点科技计划(批准号: ZDXM2014037, ZDXM20120003)、 海口市重点科技计划项目(批准号: 2014055)、 海南省自然科学基金(批准号: 214017)和海南省水环境污染治理与资源化重点实验室开放基金资助

Effect of Modified Sodium Alginate Aggregation Behavior on Electrospun Nanofiber Morphology

GAO Pengbo1, FENG Yuhong1,*(), LI Jiacheng1,*(), YAN Huiqiong2, HUANG Junhao1, WU Tiantian1, HUANG Wenhong1   

  1. 1. College of Materials and Chemical Engineering, Hainan University, Haikou 570228, China
    2. College of Chemistry and Chemical Engineering, Hainan Normal University, Haikou 571158, China
  • Received:2014-09-16 Online:2015-04-10 Published:2015-03-19
  • Contact: FENG Yuhong,LI Jiacheng E-mail:ljcfyh@263.net;lijiacheng@hainu.edu.cn
  • Supported by:
    † Supported by the National Natural Science Foundation of China(No.21366010), the Focus Plan of Hainan Province Science and Technology, China(No.ZDXM2014037, ZDXM20120003), the Science and Technology Project of Haikou, China(No.2014055), the Natural Science Foundation of Hainan, China(No.214017), the Open Fund of Hainan Province Water Environmental Pollution Control, China and Resource Reuse Key Laboratory, China

摘要:

以过硫酸钾(KPS)为引发剂, 采用双丙酮丙烯酰胺(DAA)对海藻酸钠(SA)进行改性, 制备了海藻酸钠-聚双丙酮丙烯酰胺两亲性共聚物(SA-PDAA). 将SA-PDAA与聚乙烯醇(PVA)复配, 并进行静电纺丝, 制得SA-PDAA/PVA电纺纳米纤维. 通过红外光谱、 差示扫描量热和荧光光谱表征了SA-PDAA的结构和性能, 通过黏度仪、 表面张力仪和电导率仪测试了SA-PDAA纺丝液的物理性能, 用扫描电子显微镜表征了SA-PDAA/PVA电纺纳米纤维的形貌, 考察了SA-PDAA/PVA电纺纳米纤维的释药性能. 结果表明, DAA接枝到SA分子链上, SA-PDAA的临界聚集浓度为0.072 g/L, SA-PDAA具有良好的两亲性, SA-PDAA/PVA电纺纳米纤维具有均一的形貌. 改性后的SA可以有效地减缓药物释放速度, 提高SA-PDAA/PVA电纺纳米纤维的缓释性能.

关键词: 改性海藻酸钠, 聚乙烯醇, 静电纺丝, 纳米纤维, 双丙酮丙烯酰胺

Abstract:

Using the potassium persulfate(KPS) as an initiator, through modified reaction of diacetone acrylamide(DAA) and sodium alginate(SA), the amphiphilic SA-PDAA block copolymer was synthesized. By electrospinning the mixture of SA-PDAA and polyvinyl alcohol(PVA) solution, SA-PDAA/PVA electrospun fibers were prepared. The structure and properties of SA-PDAA were characterized by means of Fourier transform infrared spectroscopy(FTIR), differential scanning calorimetry(DSC) and fluorescence spectrum. Furthermore. The physical properties of SA-PDAA spinning solution were determined by viscometer, surface tensiometer and electrical conductivity meter, the morphology of SA-PDAAA/PVA electrospun fibers were determined by scanning electron microscopy(SEM). And the drug release studies of SA-PDAAA/PVA electrospun fibers were also investigated. Experimental results showed that DAA had successfully grafted onto the sodium alginate molecular chains. The critical aggregation concentration measured by fluorescence spectrum was reduced to 0.072 g/L, which demonstrated the good amphipathy of SA-PDAA. The morphology of SA-PDAA/PVA electrospun fiber exhibited more uniform size. The drug release properties show that SA-PDAA can effectively slow the drug release rate, thus improving the retarded releasing characteristics of SA-PDAA/PVA electrospun fibers.

Key words: Modified sodium alginate, Polyvinyl alcohol, Electrospinning, Nanofiber, Diacetone acrylamide

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