Jiang Shan, Peng Xincheng, Wu Zixin, Cui Hemin, Wei Ligang, Shao Guolin, Liu Na, Wei Li
School of Light Industry and Chemical Engineering, Dalian Polytechnic University Dalian 116034 China
Wuxi Zhongwei Knowledge Integration Co., Ltd Wuxi 214001 China.
RSC Adv. 2025 Sep 11;15(39):32882-32893. doi: 10.1039/d5ra03784k. eCollection 2025 Sep 5.
Seaweed residue (SR) is an industrial by-product produced during seaweed extraction, which is generally used in feed processing with low added value and cheap price (<0.2 $ per kg). In this study, we reported that Nano Seaweed residue fibers were extracted from seaweed residue, and SR-CNF was prepared by pretreatment of SR with oxalic acid (OA) dihydrate combined with an assisted ultrasonic disintegration method. The effects of different OA contents on the yield and physicochemical properties of SR-CNF, as well as the potential value of the application of seaweed residue-based biocomposite films were investigated in the pretreatment system. It has some reference value for the exploration of algal residue-based nanofiber preparation. Using the casting method, the SR-CNF was used as the reinforcing material, and the algal residue-based composite film was prepared with an elongation at break of 83.2% and a tensile strength of 12.9 MPa. The film has good light transmittance, and it also possesses moderate tensile strength as well as excellent UV protection. Of particular interest is that this UV shielding effect is entirely derived from the natural color-emitting groups within the material, a unique property that makes the composite film have great application prospects in the field of food packaging.
海藻残渣（SR）是海藻提取过程中产生的一种工业副产品，通常用于附加值较低且价格便宜（每公斤<0.2美元）的饲料加工。在本研究中，我们报道了从海藻残渣中提取纳米海藻残渣纤维，并通过用二水合草酸（OA）对SR进行预处理并结合辅助超声崩解方法制备了SR-CNF。在预处理体系中研究了不同OA含量对SR-CNF产率和理化性质的影响，以及基于海藻残渣的生物复合膜的潜在应用价值。这对探索基于藻类残渣的纳米纤维制备具有一定的参考价值。采用流延法，将SR-CNF用作增强材料，制备出的基于藻类残渣的复合膜的断裂伸长率为83.2%，拉伸强度为12.9MPa。该膜具有良好的透光率，还具有适度的拉伸强度以及优异的紫外线防护性能。特别值得关注的是，这种紫外线屏蔽效果完全源自材料内部的天然发色基团，这一独特特性使得复合膜在食品包装领域具有巨大的应用前景。
