Biomedical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Central 6th, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8566, Japan.
Advanced Coating Technology Research Center, National Institute of Advanced Industrial Science and Technology (AIST), Central 5th, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan.
Carbohydr Polym. 2018 Nov 15;200:239-247. doi: 10.1016/j.carbpol.2018.08.005. Epub 2018 Aug 4.
The thermal, crystalline, and pressure-sensitive adhesive properties of thermoplastic monoesters made from paramylon, a storage polysaccharide of Euglena gracilis, and a long-chain acyl chloride, were examined. Differential scanning calorimetry revealed that the thermal properties of these paramylon monoesters were dependent on the chain length and the average degree of substitution of the long-chain acyl group (av. DS). X-ray diffractometry revealed that the product solids with a myristoyl or palmitoyl group had a less ordered lateral acyl chain structure than those with a stearoyl group. Tackiness testing showed that the introduction of a myristoyl group into paramylon with an av. DS of ∼2.6 to ∼2.9 yielded palpable pressure-sensitive adhesion. A slight deviation of the chain length and/or av. DS from those of tacky paramylon myristate solids weakened or dispersed the tackiness. These results demonstrate the feasibility of using paramylon myristate solids with the av. DS in a specific range as a practical pressure-sensitive adhesive.
研究了来源于绿眼虫（Euglena gracilis）贮藏多糖--海藻糖的偏苯三酸单酯和长链酰氯的热学、结晶和压敏胶性能。差示扫描量热法表明这些海藻糖单酯的热学性能取决于长链酰基的链长和平均取代度（av. DS）。X 射线衍射法表明，含豆蔻酰基或棕榈酰基的产物固体具有比含硬脂酰基的产物固体更无序的侧酰链结构。粘性测试表明，将平均取代度（av. DS）约为 2.6 至 2.9 的海藻糖引入到豆蔻酸中，可产生可感知的压敏胶粘性。压敏胶粘性海藻糖单酯固体的链长和/或 av. DS 的微小偏差会削弱或分散粘性。这些结果表明，在特定范围内具有特定 av. DS 的海藻糖单酯固体可用作实用的压敏胶。
