School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, China.
Carbohydr Polym. 2013 Jan 30;92(1):223-7. doi: 10.1016/j.carbpol.2012.08.100. Epub 2012 Sep 7.
Amphiphilic alginate esters (Alg-C(n)) with different degree of substitution (DS) and hydrophobic alkyl length were synthesized by the reaction between partially protonated sodium alginate and aliphatic alcohols (octanol, dodecanol or hexadecanol) and characterized by conventional methods. The critical micelles concentration (CMC) of Alg-C(n) was determined by measuring the fluorescence intensity of pyrene as a fluorescent probe, conductance and surface tension (SFT). Formation and characteristics of the self-assembly micelles of Alg-C(n) were studied by transmission electron microscopy (TEM) and Zetasizer Nano Series method. The results indicate that CMC value and the self-assembled micelle size decreased with the increasing of the hydrophobic alkyl chain length, as the DS of Alg-C(n) is similar.
通过部分质子化的海藻酸钠与脂肪醇（辛醇、十二醇或十六醇）的反应合成了具有不同取代度（DS）和疏水烷基长度的两亲性海藻酸盐酯（Alg-C（n）），并通过常规方法进行了表征。通过测量芘作为荧光探针的荧光强度、电导率和表面张力（SFT）来确定 Alg-C（n）的临界胶束浓度（CMC）。通过透射电子显微镜（TEM）和 Zetasizer Nano Series 方法研究了 Alg-C（n）的自组装胶束的形成和特性。结果表明，CMC 值和自组装胶束尺寸随着疏水烷基链长度的增加而减小，因为 Alg-C（n）的 DS 相似。
