Synthesis and characterization of new unsaturated esters of Gellan Gum
Synthesis and characterization of new unsaturated esters of Gellan Gum
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DOI：
10.1016/j.carbpol.2007.05.021
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发表时间：
2008-01-05
影响因子：
11.2
通讯作者：
Riess, G.
中科院分区：
文献类型：
--
作者：
Hamcerencu, Mihaela;Desbrieres, J.;Riess, G.
通过在各种条件下进行酯化反应，合成了一系列通过添加自由基可聚合基团而形成的结冷胶不饱和酯，这些酯可以在温和条件下聚合，设计出具有水凝胶性质的可生物降解的三维网络。在水中与丙烯酸均匀地或在有机溶剂中与丙烯酰氯和马来酸酐非均相地获得不同程度的官能化。丙烯酸酯和马来酸酯基团的测定通过ATR-FTIR和H-1液体NMR技术进行。通过 H-1 NMR 测定的取代度可以通过改变官能化剂的化学性质、反应时间和温度来控制。与丙烯酸和丙烯酰氯相比，马来酸酐呈现出更高的反应性。 (c) 2007 Elsevier Ltd. 保留所有权利。
A series of Gellan Gum unsaturated esters by addition of free radical polymerizable groups, which can be polymerized under mild conditions to design biodegradable three-dimensional networks having hydrogels properties, were synthesized by esterification under various conditions. Different degrees of functionalization were obtained either homogeneously in water with acrylic acid or heterogeneously with acryloyl chloride and maleic anhydride in organic solvents. Acrylate and maleate groups determination was carried out by ATR-FTIR and H-1 liquid NMR techniques. The degree of substitution as determined by H-1 NMR could be controlled by varying the chemical nature of functionalization agent, reaction time and temperature. Maleic anhydride presents a higher reactivity as compared to acrylic acid and acryloyl chloride. (c) 2007 Elsevier Ltd. All rights reserved.