| 淀粉-丙烯酸钠接枝共聚物的固体高分辨核磁共振研究 |
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| 引用本文： | 郑裕东,王迎军,陈晓峰,刘青,吴刚.淀粉-丙烯酸钠接枝共聚物的固体高分辨核磁共振研究[J].高等学校化学学报,2005,26(9):1735-1738. |
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| 作者姓名： | 郑裕东 王迎军 陈晓峰 刘青 吴刚 |
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| 作者单位： | 华东师范大学理工学院,教育部光谱学与波谱学重点实验室,上海,200062;中国科学院长春应用化学研究所,长春,130022 |
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| 基金项目： | 国家自然科学基金;广东省自然科学基金;广东省科技攻关项目;北京科技大学校科研和教改项目 |
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| 摘 要： | 运用固体高分辨核磁共振技术,通过测量13C魔角旋转/交叉极化(CP/MAS)谱、1H自旋-晶格弛豫时间T1及旋转坐标系中的自旋-晶格弛豫时间T1ρ,对一系列淀粉-丙烯酸钠接枝共聚物的相结构进行了研究,并与淀粉、均聚丙烯酸钠及两者共混物的实验结果进行了比较.结果表明,接枝共聚导致了淀粉结晶度的明显降低;在共混物和接枝共聚物中,淀粉和聚丙烯酸钠组分都具有纳米尺度的相容性,由于接枝的效应,接枝共聚物中两个组分表现出比共混物更高的相容水平.
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| 关 键 词： | 淀粉-丙烯酸钠接枝共聚物 相结构 固体高分辨核磁共振碳谱 自旋-晶格弛豫时间 |
| 文章编号： | 0251-0790（2005）09-1735-04 |
| 收稿时间： | 09 20 2004 12:00AM |
| 修稿时间： | 2004-09-20 |
Characterization and Properties of Poly(vinyl alcohol)/Hydroxylapatite Hydrogels Prepared by Compound in situ with Sol-gel Method |
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| ZHENG Yu-Dong,WANG Ying-Jun,CHEN Xiao-Feng,LIU Qing,WU Gang.Characterization and Properties of Poly(vinyl alcohol)/Hydroxylapatite Hydrogels Prepared by Compound in situ with Sol-gel Method[J].Chemical Research In Chinese Universities,2005,26(9):1735-1738. |
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| Authors: | ZHENG Yu-Dong WANG Ying-Jun CHEN Xiao-Feng LIU Qing WU Gang |
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| Institution: | 1. Key Laboratory of Education Ministry for Optics and Magnetic Resonance Spectroscopy, College of Science and Technology, East China Normal University, Shanghai 200062, China;
2. Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China |
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| Abstract: | A new kind of bioactive polyvinyl alcohol (PVA)/ hydroxylapatite (HA) blend hydrogels were prepared by compound in situ with sol-gel synthesis of HA. The structures and properties of the blend hydrogels with different HA contents were investigated. The crystal structure and dispersed statement of HA in hydrogels were characterized by XRD, FTIR and SEM. PVA/HA hydrogels were also prepared by physical mixing as a comparison. Ultrafine granular-crystalline HA powder was formed in blend hydrogels with sol-gel synthesis of HA in situ when compounding with PVA solution. Whereas HA was dispersed hon-uniformly and formed agglomeration of HA powder in blend hydrogels when compoumding with PVA by physical mixing. As a additional crystal core, HA accelerated the crystallization of PVA hydrogels, and increased the mechanical strength of the blend hydrogels. |
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| Keywords: | Hydrogel Poly(vinyl alcohol) Hydroxylapatite Bioactivity |
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