Environmentally benign alginate extraction and fibres spinning from different European Brown algae species.
Environmentally benign alginate extraction and fibres spinning from different European Brown algae species.
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DOI：
10.1016/j.ijbiomac.2022.11.306
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发表时间：
2023-01
影响因子：
8.2
通讯作者：
Mariana P. Silva;Ishrat Jahan Badruddin;T. Tonon;S. Rahatekar;L. Gomez
中科院分区：
文献类型：
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作者：
Mariana P. Silva;Ishrat Jahan Badruddin;T. Tonon;S. Rahatekar;L. Gomez
天然纤维的应用正在扩大，需要可持续的替代品来支持这一日益增长的需求。我们研究了从糖藻（saccharina latatissima， SAC）、海带（Laminaria digitata， LAM）、海带（SACC）和海马拉斯（himanthaliaspp）中提取海藻酸盐来生产纤维。(他)。采用基于柠檬酸的可持续方案提取（3% w/vbiomass）后，在小规模实验（1.5 g起始原料）中，粗藻酸盐占SAC和LAM生物量干重的61 - 65%，占SACC和HIM生物量干重的34 - 41%。有趣的是，扩大提取（60 g起始原料）将产量降低到26 - 30%。与SACC和HIM相比，SAC和LAM海藻酸盐的甘露醛酸/古鲁醛酸的M/G比和分子量最高（M/G分别为1.98和2.23，MW分别为302和362 kDa，分别为1.83和1.86,268和168 kDa）。当四种海藻酸盐与CaCl2交联纺丝时，只有SAC和LAM海藻酸盐产生纤维。这些纤维在拉伸作用下没有出现团块或裂缝，并且具有相似的杨氏模量（2.4和2.0 GPa）。我们已经证明海藻酸盐是从。latissimaandL。可以成功地纺成与CaCl2交联的功能性纤维。
Applications of natural fibres are expanding, and sustainable alternatives are needed to support this growing demand. We investigated the production of fibres using alginates fromSaccharina latissima(SAC),Laminaria digitata(LAM),Sacchoriza polyschides(SACC), andHimanthaliaspp. (HIM).After extraction (3 %w/vbiomass) 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 CaCl2, 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 fromS. latissimaandL. digitatacan be successfully spun into functional fibres cross-linked with CaCl2.