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Zhang J, Huang Y, Zhang X, Guo X, Chen K, Feng X, Kong J, Liu Y, Shang B, Xu W, Chen D. Flexible transparent and hydrophobic SiNCs/PDMS coatings for anti-counterfeiting applications. MATERIALS HORIZONS 2024; 11:3573-3584. [PMID: 38747363 DOI: 10.1039/d4mh00211c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/30/2024]
Abstract
Silicon nanocrystals (SiNCs) have attracted considerable attention in many advanced applications due to silicon's high natural abundance, low toxicity, and impressive optical properties. However, little attention has been paid to fluorescence anti-counterfeiting applications based on lipophilic silicon nanocrystals. Moreover, it is also a challenge to fabricate aging-resistant anti-counterfeiting coatings based on silicon nanocrystals. Herein, this paper presents a demonstration of aging-resistant fluorescent anti-counterfeiting coatings based on red fluorescent silicon nanocrystals. In this work, lipophilic silicon nanocrystals (De-SiNCs) with red fluorescence were prepared first by thermal hydrosilylation between hydrogen-terminated silicon nanocrystals (H-SiNCs) and 1-decene. Subsequently, a new SiNCs/PDMS coating (De-SiNCs/DV) was fabricated by dispersing De-SiNCs into reinforcing PDMS composites with vinyl-capped silicone resin. Interestingly, the De-SiNCs/DV composites exhibit superior transparency (up to 85%) in the visible light range, outstanding fluorescence stabilities with an average lifetime of 20.59 μs under various conditions including acidic/alkaline environments, different organic solvents, high-humidity environments and UV irradiation. Meanwhile, the encapsulation of De-SiNCs is beneficial to enhancing the mechanical properties and thermal stability of De-SiNCs/DV composites. Additionally, the De-SiNCs/DV coating exhibits an excellent anti-counterfeiting effect on cotton fabrics when used as an ink in screen-printing. These findings pave the way for developing innovative flexible multifunctional anti-counterfeiting coatings in the future.
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Affiliation(s)
- Jinfeng Zhang
- State Key Laboratory of New Textile Materials & Advanced Processing Technology, Wuhan Textile University, Wuhan 430200, P. R. China.
| | - Yuanfen Huang
- School of Materials Science and Engineering, Wuhan Textile University, Wuhan, 430200, P. R. China
| | - Xiaoyuan Zhang
- School of Materials Science and Engineering, Wuhan Textile University, Wuhan, 430200, P. R. China
| | - Xin Guo
- State Key Laboratory of New Textile Materials & Advanced Processing Technology, Wuhan Textile University, Wuhan 430200, P. R. China.
| | - Kailong Chen
- School of Materials Science and Engineering, Wuhan Textile University, Wuhan, 430200, P. R. China
| | - Xiang Feng
- School of Materials Science and Engineering, Wuhan Textile University, Wuhan, 430200, P. R. China
| | - Jiajia Kong
- School of Materials Science and Engineering, Wuhan Textile University, Wuhan, 430200, P. R. China
| | - Yanqing Liu
- State Key Laboratory of New Textile Materials & Advanced Processing Technology, Wuhan Textile University, Wuhan 430200, P. R. China.
| | - Bin Shang
- State Key Laboratory of New Textile Materials & Advanced Processing Technology, Wuhan Textile University, Wuhan 430200, P. R. China.
- School of Materials Science and Engineering, Wuhan Textile University, Wuhan, 430200, P. R. China
| | - Weilin Xu
- State Key Laboratory of New Textile Materials & Advanced Processing Technology, Wuhan Textile University, Wuhan 430200, P. R. China.
| | - Dongzhi Chen
- State Key Laboratory of New Textile Materials & Advanced Processing Technology, Wuhan Textile University, Wuhan 430200, P. R. China.
- School of Materials Science and Engineering, Wuhan Textile University, Wuhan, 430200, P. R. China
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