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首页> 外文期刊>Journal of Applied Polymer Science >Preparation and Properties of Sulfopropyl Chitosan Derivatives with Various Sulfonation Degree
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Preparation and Properties of Sulfopropyl Chitosan Derivatives with Various Sulfonation Degree

机译：不同磺化度磺丙基壳聚糖衍生物的制备及性能

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摘要

In this investigation, chitosan (CS) is modified by propane sultone via a sulfonation reaction to create various degrees of sulfonation. The sulfonated chitosan (SCS) has a pendant alkyl sulfonic group dangling at the side chain, which can improve its hydrophilicity and water solubility. Elemental analysis, Fourier transform infrared spectroscopy (FTIR) and C-13 nuclear magnetic resonance (C-13 NMR) here applied to identify the structure by determining the distribution of the substituents in the product. The degree of sulfonation in the SCS can be controlled and the hydrogen bonding interaction can be reduced by varying the degree of sulfonation. A solubility test proved that solubility increased with degree of substi-tution at over a wide range of pH values. X-ray diffraction patterns of SCS samples demonstrated that the crystallinity declined as the degree of sulfonation increased. Thermogravimetric analysis and modulated differential scanning calorimetry (MDSC) results indicated that thermal stability fell but water absorbance increased with the degree of sulfonation. More water-soluble SCS is thus obtained. The controllable different sulfonation degree of the CS polymer suggests new possibilities for the application of CS-based materials
机译：在这项研究中，通过磺化反应，丙烷磺酸内酯对壳聚糖（CS）进行了改性，以产生不同程度的磺化作用。磺化壳聚糖（SCS）在侧链上悬挂有一个悬挂的烷基磺酸基，可以提高其亲水性和水溶性。元素分析，傅里叶变换红外光谱（FTIR）和C-13核磁共振（C-13 NMR）在这里用于通过确定产物中取代基的分布来鉴定结构。可以通过改变磺化度来控制SCS中的磺化度并且可以降低氢键相互作用。溶解度测试证明，在很宽的pH值范围内，溶解度都随着取代度的增加而增加。 SCS样品的X射线衍射图表明，随着磺化度的增加，结晶度下降。热重分析和调制差示扫描量热法（MDSC）的结果表明，热稳定性下降，但吸水率随磺化度的增加而增加。因此获得了更多的水溶性SCS。 CS聚合物可控制的不同磺化度为CS基材料的应用提供了新的可能性

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