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·32· 精细化工 FINE CHEMICALS 第 37 卷

量子产率和荧光寿命均有所下降。 [6] Yuan F, Wang Z, Li X, et al. Bright multicolor bandgap fluorescent
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由表 4 可知，复合胶膜的量子产率和荧光寿命均 Advanced Materials, 2017, 29(3): 1604436-1604449.
先增加后降低，当 CDs 加入量为 0.50%时制得的胶膜 [7] Yan Fanyong (颜范勇), Zou Yu (邹宇), Wang Meng (王猛), et al.
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ns，复合胶膜的量子产率和荧光寿命的降低，可能是 [8] Bhunia S K, Saha A, Maity A R, et al. Carbon nanoparticle-based
fluorescent bioimaging probes[J]. Scientific Reports, 2013, 3: 1473.
由于部分 CDs 聚集诱导荧光淬灭或聚合物基质的干 [9] Islam M S, Deng Y, Tong L, et al. In-situ direct grafting of graphene
扰，因为膜中分子间相互作用的三维网络会影响 CDs quantum dots onto carbon fibre by low temperature chemical
表面基团的状态，增加了非辐射跃迁的倾向 [24-25] 。 synthesis for high performance flexible fabric supercapacitor[J].
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（1）以 WPU 作为新型碳源合成 CDs，将不同 [11] Ghosh B, Gogoi S, Thakur S, et al. Bio-based waterborne
质量 分数 的 CDs 加入 WPU 反 应 体系 中制得 polyurethane/carbon dot nanocomposite as a surface coating material[J].
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CDs/WPU 复合材料。 [12] Gogoi S, Maji S, Mishra D, et al. Nano-bio engineered carbon
（2）随着 CDs 的加入，胶膜的热稳定性得到一 dot-peptide functionalized water dispersible hyperbranched polyurethane
for bone tissue regeneration[J]. Macromolecular Bioscience, 2017,
定提高，其中 WPU-2 胶膜的热稳定性最佳，胶膜的 17(3): 1-15.
熔融温度先降低后升高，结晶度则逐渐增加。 [13] Yong Q, Pang H, Liao B, et al. Preparation and characterization of
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（3）随着 CDs 加入量的增加，胶膜的拉伸强度 waterborne polyurethane acrylate hybrid emulsion[J]. Progress in
和断裂伸长率均呈先升高后降低的趋势，且都高于 Organic Coatings, 2018, 115: 18-26.
[14] Cai Ling (蔡玲), Wu Lixia (吴立霞), Shi Yangyang (石阳阳).
未加入 CDs 制得的标样，表明 CDs 的加入有助于改 Preparation and performance comparison of different ionic polyurethane
善 WPU 的力学性能。其中，CDs 加入量为 0.5%时 nano-SiO 2 composite emulsions[J]. Fine Chemicals (精细化工),
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拉伸强度和断裂伸长率达到最佳，分别为 36.80 MPa [15] Wen T, Yang B, Guo Y, et al. Organosilane-functionalized graphene
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（4）4 组 CDs/WPU 复合胶膜在 365 nm 紫外灯 Physics, 2014, 16(42): 23188-23195.
照射下均发出蓝光，且具有激发光波长依赖性的荧 [16] Luo Zhen (罗珍), Tao Can (陶灿), Han Xixi (韩曦曦), et al. Effect
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光性能，随着 CDs 加入量的增加，复合胶膜的荧光 polyurethane[J]. Journal of Chemical Engineering of Chinese
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