Biomedical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Central 6th, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8566, Japan.
Carbohydr Polym. 2017 Oct 1;173:451-464. doi: 10.1016/j.carbpol.2017.06.025. Epub 2017 Jun 6.
Paramylon, a storage polysaccharide of Euglena gracilis, is a linear β-1,3-glucan with a weight-average molecular weight of ∼2.0×10. Sequential long-chain acylation and succinylation of paramylon yielded amphiphilic paramylon acylate succinates. Owing to their amphiphilicity, these paramylon derivatives showed higher viscosity than paramylon succinate when dispersed in an aqueous solution. Examination of the viscosity of aqueous solutions containing paramylon acylate succinates differing in chain length and degree of substitution of long-chain acyl groups (DS) revealed that the longer the acyl chain and the higher the DS, the higher the viscosity of the aqueous solution. Solution casting yielded transparent and mechanically tough films from paramylon acylate succinates. These films had high water absorbability, up to ∼1000 times their weight.
鱼腥藻淀粉，一种衣藻的储存多糖，是一种线性的β-1,3-葡聚糖，重均分子量约为 2.0×10。鱼腥藻淀粉的顺序长链酰化和琥珀酰化得到了两亲性的鱼腥藻淀粉酯琥珀酸盐。由于它们的两亲性，这些鱼腥藻淀粉衍生物在分散于水溶液中时比琥珀酸酯淀粉显示出更高的粘度。对含有不同链长和长链酰基取代度（DS）的鱼腥藻淀粉酯琥珀酸盐的水溶液的粘度进行考察，结果表明，酰链越长，DS 越高，水溶液的粘度越高。溶液浇铸法从鱼腥藻淀粉酯琥珀酸盐中得到透明且机械性能强的薄膜。这些薄膜具有高吸水性，可达其重量的约 1000 倍。
