N-琥珀酰基-O-羟丙基磺酸壳聚糖仿生合成球霰石碳酸钙*

doi:10.11901/1005.3093.2015.073

材料研究学报

2016, Vol. 30

Issue (1): 31-37 DOI: 10.11901/1005.3093.2015.073

研究论文

本期目录 | 过刊浏览

N-琥珀酰基-O-羟丙基磺酸壳聚糖仿生合成球霰石碳酸钙*

陈晓东, 辛梅华, 李明春(

), 陈彰旭, 陈志强

华侨大学材料科学与工程学院环境友好功能材料教育部工程中心厦门 361021

Biomimetic Synthesis of Vaterite by N-Succinyl-O-Hydroxypropyl Sulfonated Chitosan

CHEN Xiaodong, XIN Meihua, LI Mingchun^**(

), CHEN Zhangxu, CHEN Zhiqiang

College of Material Science and Engineering, Huaqiao University, Engineering Research Center of Environment-Friendly Functional Materials, Ministry of Education, Xiamen 361021, China

引用本文:

陈晓东, 辛梅华, 李明春, 陈彰旭, 陈志强. N-琥珀酰基-O-羟丙基磺酸壳聚糖仿生合成球霰石碳酸钙*[J]. 材料研究学报, 2016, 30(1): 31-37.
Xiaodong CHEN, Meihua XIN, Mingchun LI, Zhangxu CHEN, Zhiqiang CHEN. Biomimetic Synthesis of Vaterite by N-Succinyl-O-Hydroxypropyl Sulfonated Chitosan[J]. Chinese Journal of Materials Research, 2016, 30(1): 31-37.

全文: PDF(3258 KB) HTML

摘要:

制备了N-琥珀酰基-O-羟丙基磺酸壳聚糖(SA-HPSCS), 用FTIR、¹H NMR等测试手段对其表征, 并以其为有机基质仿生合成碳酸钙, 对照比较在纯水体系和SA-HPSCS体系下合成的碳酸钙的晶型和形貌, 并考察体系的pH值对SA-HPSCS仿生合成碳酸钙的影响, 探讨其作用机理。结果表明, 在纯水体系中形成单一的方解石晶体, 而在SA-HPSCS体系中形成以球霰石为主的碳酸钙晶体。在pH=6时, SA-HPSCS体系中形成的球霰石含量达95.8%; 随着pH由6上升到10, 球霰石含量由95.8%下降到75.2%, 尺寸由6-12 μm下降到2-6 μm。这些结果说明, SA-HPSCS对碳酸钙有良好的调控作用, 形成尺寸不一、形貌差异、晶相含量可控的碳酸钙晶体。其调控作用受体系pH值的影响。

关键词 ：有机高分子材料, 壳聚糖衍生物, 仿生合成, 碳酸钙晶体, pH影响

Abstract：

N-succinyl-O-hydroxypropyl sulfonated chitosan (SA-HPSCS) was prepared and then characterized by FT-IR and ¹HNMR. The role of SA-HPSCS in the biomimetic synthesis of CaCO₃ was studied, while the CaCO₃ crystal produced in a pure water system was used as a reference. The influence of pH value on the morphology and crystallographic structure of CaCO₃ crystal in the SA-HPSCS system was investigated and the relevant mechanism was proposed. The results show that the calcite is the only phase of CaCO₃ crystal prepared in the pure water system, while the vaterite is dominant phase of those prepared in the SA-HPSCS system. By pH=6 the vaterite content in the prepared CaCO₃ reached 95.8%, but both the size and the content of the vaterite dropped with the increase of pH value. The results also indicate that SA-HPSCS could regulate effectively the synthesis process of the CaCO₃ crystal in terms of morphology, polymorph and dimension, and the pH value could strongly affect its regulation effect.

Key words： organic polymer materials chiosan derivatives biomimetic synthesis calcium carbonate pH response

收稿日期: 2015-02-04

基金资助:* 福建省重点科技项目2009H0030、福建省自然科学基金2012J01396及科技部科技人员服务企业项目2009GJC40030

作者简介: 李明春, 教授

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https://www.cjmr.org/CN/10.11901/1005.3093.2015.073 或 https://www.cjmr.org/CN/Y2016/V30/I1/31

图1 壳聚糖及其衍生物的FT-IR谱

图2 壳聚糖衍生物SACS和SA-HPSCS的1H NMR图

图3 SA-HPSCS的Zeta电位与pH值的关系

图4 在不同体系中制备的碳酸钙的FTIR谱

图5 在纯水和SA-HPSCS体系中制备的碳酸钙的XRD谱

图6 在纯水和SA-HPSCS体系中制备的碳酸钙的FESEM图

图7 pH值不同的情况下碳酸钙的XRD谱

图8 pH值不同时碳酸钙的FESEM图

图9 不同pH值时SA-HPSCS仿生合成球霰石机理

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