Experimental and in silico approaches to identify a sustainable source of bioplastics from seaweeds

IF 4.1 4区工程技术 Q3 ENERGY & FUELS

Biomass Conversion and Biorefinery Pub Date : 2025-03-21 DOI:10.1007/s13399-025-06766-4

Babu Sarangam, Dhamodharan Prabhu, Rathinam Raja, Pugalendran Sangeetha, K. R. Jayappriyan, Sabariswaran Kandasamy, Mathiyazhagan Narayanan

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引用次数: 0

Abstract

Carrageenan was extracted from Kappaphycus alvarezii, alginate from Sargassum wightii, and agar from Gracilaria crassa and Gelidiella acerosa respectively. The plastic film formed with carrageenan, sodium alginate, and corn starch (F6) showed a higher tensile strength (TS) of 3.051 N/mm² followed by a TS value of 3.073 N/mm² for films made of carrageenan, sodium alginate, and agar (F7). The lowest tensile strength (0.984 N/mm²) was observed in agar film (F3). Garden soil led to higher biodegradation of the seaweed films compared to clay and beach soil. The films F6 and F7 biodegraded with a loss of 90 and 74% respectively within 30 days in garden soil. Given the better biodegradability and better TS and E value, the film F6 (carrageenan sodium alginate and corn starch) can be improvised for wider applications in food packaging and biomedical applications. FT-IR results of F6 bioplastics possessed characteristic peaks that support the chemical properties of bioplastics derived from seaweeds. The molecular docking and molecular dynamics simulation analysis showed that these three biopolymers maintained favorable binding and strong interaction with the cutinase (CutL1) enzyme which is widely reported for the biodegradable function in Aspergillus oryzae. SEM images of the F6 bioplastic show a heterogeneous structure with enhanced roughness.

Graphical abstract

Abstract Image

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从海藻中确定生物塑料可持续来源的实验和计算机方法

分别从芦笋中提取卡拉胶，从马尾藻中提取海藻酸盐，从黄花蒿中提取琼脂。由卡拉胶、海藻酸钠和玉米淀粉（F6）制成的塑料薄膜的抗拉强度（TS）较高，为3.051 N/mm2，其次是由卡拉胶、海藻酸钠和琼脂（F7）制成的薄膜的TS值为3.073 N/mm2。琼脂膜的抗拉强度最低，为0.984 N/mm2 （F3）。与粘土和海滩土相比，花园土对海藻膜的生物降解程度更高。F6和F7膜在30 d内降解率分别为90%和74%。由于F6（卡拉胶海藻酸钠和玉米淀粉）薄膜具有较好的生物降解性和较好的TS和E值，因此可以在食品包装和生物医学应用中得到更广泛的应用。F6生物塑料的FT-IR结果具有支持从海藻中提取的生物塑料的化学性质的特征峰。分子对接和分子动力学模拟分析表明，这三种生物聚合物与广泛报道的在米曲霉中具有生物降解功能的角质酶（CutL1）酶保持良好的结合和强相互作用。F6生物塑料的SEM图像显示为非均质结构，粗糙度增强。图形抽象

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来源期刊

Biomass Conversion and Biorefinery Energy-Renewable Energy, Sustainability and the Environment

CiteScore

7.00

自引率

15.00%

发文量

1358

期刊介绍： Biomass Conversion and Biorefinery presents articles and information on research, development and applications in thermo-chemical conversion; physico-chemical conversion and bio-chemical conversion, including all necessary steps for the provision and preparation of the biomass as well as all possible downstream processing steps for the environmentally sound and economically viable provision of energy and chemical products.