Silva Mariana P, Badruddin Ishrat Jahan, Tonon Thierry, Rahatekar Sameer, Gomez Leonardo D
Centre for Novel Agricultural Product, Department of Biology, University of York, Wentworth Way, York YO10 5DD, United Kingdom.
Enhanced Composites and Structures Centre, School of Aerospace, Transport and Manufacturing, Cranfield University, Bedfordshire MK43 0AL, United Kingdom.
Int J Biol Macromol. 2023 Jan 31;226:434-442. doi: 10.1016/j.ijbiomac.2022.11.306. Epub 2022 Dec 8.
Applications of natural fibres are expanding, and sustainable alternatives are needed to support this growing demand. We investigated the production of fibres using alginates from Saccharina latissima (SAC), Laminaria digitata (LAM), Sacchoriza polyschides (SACC), and Himanthalia spp. (HIM). After extraction (3 % w/v biomass) using a sustainable protocol based on citric acid, crude alginate represented 61-65 % of the biomass dry weight for SAC and LAM, and 34-41 % for SACC and HIM when experiments were performed at small scale (1.5 g of starting material). Interestingly, scaling-up extraction (60 g of starting material) decreased yields to 26-30 %. SAC and LAM alginates had the highest M/G (mannuronic acid/guluronic acid) ratios and molecular weights when compared to those from SACC and HIM (M/G:1.98 and 2.23, MW: 302 and 362 kDa, vs 1.83 and 1.86, 268 and 168 kDa). When the four types of alginates were tested for spinning fibres cross-linked with CaCl, only SAC and LAM alginates produced fibres. These fibres showed no clumps or cracks under stretching action and presented a similar Young's modulus (2.4 and 2.0 GPa). We have demonstrated that alginate extracted from S. latissima and L. digitata can be successfully spun into functional fibres cross-linked with CaCl.
天然纤维的应用正在不断扩展，因此需要可持续的替代品来满足这一日益增长的需求。我们研究了利用来自海带（SAC）、掌状海带（LAM）、多歧鹿角菜（SACC）和鹿角菜属（HIM）的藻酸盐生产纤维的情况。使用基于柠檬酸的可持续方案进行提取（3% w/v生物质）后，在小规模实验（1.5克起始材料）中，粗藻酸盐占SAC和LAM生物质干重的61 - 65%，占SACC和HIM的34 - 41%。有趣的是，扩大提取规模（60克起始材料）会使产量降至26 - 30%。与来自SACC和HIM的藻酸盐相比，SAC和LAM藻酸盐具有最高的M/G（甘露糖醛酸/古洛糖醛酸）比值和分子量（M/G：1.98和2.23，MW：302和362 kDa，对比1.83和1.86，268和168 kDa）。当测试用氯化钙交联纺丝的四种藻酸盐纤维时，只有SAC和LAM藻酸盐能生产出纤维。这些纤维在拉伸作用下没有结块或裂缝，并且呈现出相似的杨氏模量（2.4和2.0 GPa）。我们已经证明，从海带和掌状海带中提取的藻酸盐可以成功纺成与氯化钙交联的功能性纤维。
