Biomimetic Robust Starch Composite Films with Super-Hydrophobicity and Vivid Structural Colors

Autor:	Yateng Wang, Jianru Fan, Hao Zhao, Xiaoming Song, Zhe Ji, Congxia Xie, Fushan Chen, Yao Meng
Rok vydání:	2022
Předmět:	Organic Chemistry biobased materials starch composite films cellulose fiber high mechanical stability structural color super-hydrophobicity Color Water Starch General Medicine Silicon Dioxide Catalysis Computer Science Applications Inorganic Chemistry Biomimetics Spectroscopy Fourier Transform Infrared Physical and Theoretical Chemistry Hydrophobic and Hydrophilic Interactions Molecular Biology Spectroscopy
Zdroj:	International Journal of Molecular Sciences; Volume 23; Issue 10; Pages: 5607
ISSN:	1422-0067
DOI:	10.3390/ijms23105607
Popis:	The starch composite films (SCFs) will be one of the best alternative packaging materials to petroleum based plastic films, which mitigates white pollution and energy consumption. However, weak mechanical stability, water resistance, and dyeability has hindered the application of SCFs. Herein, a bioinspired robust SCFs with super-hydrophobicity and excellent structural colors were prepared by fiber-reinforcement and assembling SiO2/Polydimethylsiloxane (PDMS) amorphous arrays on the surface of SCFs. The properties of the designed SCFs were investigated by various methods including scanning electron microscope (SEM), Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), thermo-gravimetric analysis (TGA), a tensile test, contact angle (CA) test, and an optical test. The results showed that the obtained SCFs possessed a higher tensile strength (55.17 MPa) attributed to the formed abundant hydrogen bonds between the molecular chains of the starch, cellulose fiber, and polyvinyl alcohol. Benefiting from the nanostructure with rough surface which were modified by materials with low surface free energy, the contact angle and sliding angle of the film reached up to 154° and 2°, respectively. The colors which were produced by the constructive interference of the coherent scattered light could cover all of the visible regions by tuning the diameters of the SiO2 nanoparticles. The strategy in the present study not only reinforces the mechanical strength and water resistance of SCFs but also provides an environmentally friendly way to color the them, which shows unprecedented application potential in packaging materials of the starch composite films.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2efcb64c36e66cfa19fd9a79fd8fe8c9 https://doi.org/10.3390/ijms23105607 Zobrazit plný text záznamu Plný text ve formátu PDF Plný text ve formátu HTML
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