Sustainable UV-shielding sodium alginate films via direct nanostructure replication from cicada wings

IF 5.4 2区化学 Q2 CHEMISTRY, PHYSICAL

Colloids and Surfaces A: Physicochemical and Engineering Aspects Pub Date : 2025-09-30 DOI:10.1016/j.colsurfa.2025.138501

Linmei Zhang , Haruhiro Ino , Shinjiro Machida , Kunkun Fu , Kazushi Yamada

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引用次数: 0

Abstract

The development of environmentally friendly, biodegradable films with functional performance is essential for reducing dependence on petroleum-based polymers and mitigating environmental pollution. In this study, we present a sustainable and straightforward method for producing UV shielding sodium alginate films by directly transferring natural nanostructures from cicada wings onto the film surface through a simple casting process. The nanostructured films were characterized using scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR), differential scanning calorimetry (DSC), and ultraviolet visible (UV-Vis) transmission spectroscopy. Replication of the wing nanostructures produced a significant reduction in UV transmittance, attributed to enhanced Rayleigh and Mie scattering. Ionic crosslinking with calcium chloride further altered the surface morphology, increased thermal stability, and modified wettability. Notably, these effects were achieved without the use of petroleum-based polymers, chemical additives, or complex fabrication techniques. This approach demonstrates a viable pathway for developing sustainable, functional biopolymer films with potential applications in packaging, coatings, and biomedical products.

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通过直接复制蝉翅的纳米结构实现可持续的紫外线屏蔽海藻酸钠膜

开发具有功能性能的环境友好型、可生物降解薄膜对于减少对石油基聚合物的依赖和减轻环境污染至关重要。在这项研究中，我们提出了一种可持续的、简单的方法，通过简单的铸造工艺，将蝉翅上的天然纳米结构直接转移到膜表面，从而生产出紫外线屏蔽海藻酸钠薄膜。采用扫描电镜（SEM）、傅里叶变换红外光谱（FT-IR）、差示扫描量热法（DSC）和紫外可见（UV-Vis）透射光谱对纳米结构薄膜进行了表征。由于瑞利散射和米氏散射增强，机翼纳米结构的复制显著降低了紫外线透过率。与氯化钙的离子交联进一步改变了表面形态，增加了热稳定性，并改变了润湿性。值得注意的是，这些效果是在没有使用石油基聚合物、化学添加剂或复杂的制造技术的情况下实现的。这种方法为开发可持续的、功能性的生物聚合物薄膜提供了一条可行的途径，在包装、涂料和生物医学产品中具有潜在的应用前景。

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来源期刊

Colloids and Surfaces A: Physicochemical and Engineering Aspects 化学-物理化学

CiteScore

8.70

自引率

9.60%

发文量

2421

审稿时长

56 days

期刊介绍： Colloids and Surfaces A: Physicochemical and Engineering Aspects is an international journal devoted to the science underlying applications of colloids and interfacial phenomena. The journal aims at publishing high quality research papers featuring new materials or new insights into the role of colloid and interface science in (for example) food, energy, minerals processing, pharmaceuticals or the environment.