期刊
ACS APPLIED MATERIALS & INTERFACES
卷 5, 期 3, 页码 585-591出版社
AMER CHEMICAL SOC
DOI: 10.1021/am3026536
关键词
high-hydrophobic cellulose film; controllable crystallization; interface structure; biodegradable; waterproof; packaging material
资金
- National Basic Research Program of China (973 Program) [2010CB732203]
- National Natural Science Foundation of China [20874079, 51273067]
- Fundamental Research Funds for the Central Universities [2012203020206]
A novel, highly hydrophobic cellulose composite film (RCS) with biodegradability was fabricated via solvent-vaporized controllable crystallization of stearic acid in the porous structure of cellulose films (RC). The interface structure and properties of the composite films were investigated with wide-angle X-ray diffraction (WAXD), scanning electron microscopy (SEM), differential scanning calorimetry (DSC), FT-IR, solid-state C-13 NMR, water uptake, tensile testing, water contact angle, and biodegradation tests. The results indicated that the RCS films exhibited high hydrophobicity (water contact angle achieved to 145 degrees), better mechanical properties in the humid state and lower water uptake ratio than RC. Interestingly, the stearic acid crystallization was induced by the pore wall of the cellulose matrix to form a micronano binary structure, resulting in a rough surface. The rough surface with a hierarchical structure containing micronanospace on the RCS film surface could trap abundant air, leading to the high hydrophobicity. Moreover, the RCS films were flexible, biodegradable, and low-cost, showing potential applications in biodegradable water-proof packaging.
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