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·1640· 精细化工 FINE CHEMICALS 第 35 卷

表 1 太阳光照射下样品发生变色的 R/G、R/B 值
Table 1 R/G, R/B values for coloration of samples in the sunlight
颜色 变色时间/s

参数 0 0.25 0.50 0.75 1.00 1.25 1.50 1.75 2.00 2.25 3.50 3.75 4.00 4.25 4.50 4.75
光致变色 R/G 1.10 1.15 1.25 1.33 1.44 1.56 1.63 1.75 1.84 1.88 2.20 2.26 2.26 2.26 2.26 2.26
染料分散液 R/B 1.08 1.08 1.10 1.10 1.10 1.11 1.12 1.13 1.15 1.15 1.25 1.26 1.28 1.28 1.28 1.28
光致变色 R/G 1.09 1.14 1.21 1.29 1.43 1.54 1.63 1.74 1.80 1.86 2.11 2.18 2.20 2.23 2.23 2.23
微胶囊分散液 R/B 1.08 1.10 1.10 1.10 1.10 1.12 1.14 1.15 1.16 1.18 1.27 1.30 1.30 1.34 1.34 1.34

表 2 遮蔽太阳光后样品发生褪色的 R/G、R/B 值
Table 2 R/G, R/B values for discoloration of samples after shielding the sunlight
颜色 遮蔽时间/s

参数 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30
光致变色 R/G 1.76 1.70 1.58 1.47 1.36 1.32 1.21 1.18 1.16 1.14 1.13 1.13 1.13 1.13 1.13 1.13
染料分散液 R/B 1.39 1.39 1.36 1.34 1.29 1.32 1.21 1.23 1.24 1.23 1.21 1.23 1.23 1.23 1.23 1.23
光致变色微 R/G 1.78 1.73 1.67 1.54 1.38 1.35 1.25 1.22 1.18 1.15 1.15 1.15 1.15 1.13 1.13 1.13
胶囊分散液 R/B 1.37 1.39 1.38 1.34 1.35 1.30 1.22 1.24 1.22 1.20 1.23 1.24 1.23 1.24 1.24 1.24

通过比较可以看出，在变色、褪色过程中，光 [2] Fan F, Wang C. UV-vis irradiation fatigue resistance improvement of
azo photochromic compound using polyurethane-chitosan double
致变色染料达到变色稳态、褪色稳态的时间都稍快 shell encapsulation[J]. Journal of Applied Polymer Science, 2014,
131(20): 40895.
于光致变色壳聚糖微胶囊。这是因为未被包覆的光 [3] Leelajariyakul S, Noguchi H, Kiatkamjornwong S. Surface-modified
and micro-encapsulated pigmented inks for ink jet printing on textile
致变色染料能最大程度地接受太阳光照射。而在光 fabrics[J]. Progress in Organic Coatings, 2008, 62(2): 145-161.
致变色壳聚糖微胶囊中，光致变色染料外围被包覆 [4] Guo Fengzhi (郭凤芝), An Miao (安苗), Huang Yuli (黄玉丽). Study
on the preparation of CVL/CS microcapsule [J]. Journal of Beijing
了一层壁壳，对太阳光强度有一定削弱作用，同时 Institute of Clothing Technology (北京服装学院学报), 2009, 29(2):
57-63.
微胶囊壳体对投射过来的太阳光也有一定程度的吸 [5] Harbron E J, Davis C M, Campbell J K, et al. Photochromic
dye-doped conjugated polymer nanoparticles: photomodulated
收。这些都致使被包覆的光致变色染料达到变色稳 emission and nanoenvironmental characterization[J]. Journal of
态、褪色稳态的时间稍慢于未包覆的光致变色染 [6] Physical Chemistry C, 2009, 113(31): 13707-13714.
Zhou Y, Yan Y, Du Y, et al. Preparation and application of
料，但影响程度不大，说明壳聚糖壳材对光致变色 melamine-formaldehyde photochromic microcapsules[J]. Sensors &
Actuators B Chemical, 2013, 188(11): 502-512.
染料光变色灵敏度影响较小，仍具有良好的光变色 [7] Wang Chaoxia (王潮霞), Fan Fei (范菲), Yin Yunjie (殷允杰), et al.
Preparation method of polyurethane-chitosan double-shell photochromic
灵敏性。 microcapsules: CN103962076A[P]. 2014-08-06.
[8] Fan F, Zhang W, Wang C. Covalent bonding and photochromic
properties of double-shell polyurethane-chitosan microcapsules
3 结论 crosslinked onto cotton fabric[J]. Cellulose, 2015, 22(2): 1427-1438.
[9] Feczkó T, Varga O, Kovács M, et al. Preparation and characterization
of photochromic poly(methyl methacrylate) and ethyl cellulose
（1）适宜的制备工艺条件为：质量分数 5%的 nanocapsules containing a spirooxazine dye[J]. Journal of
Photochemistry & Photobiology A Chemistry, 2011, 222(1): 293-298.
Tween80 为乳化剂，超声时间 120 min，芯壁质量比 [10] Abdollahi A, Mahdavian A R, Salehimobarakeh H. Preparation of
1∶3，在此条件下可得到粒径分布窄，平均粒径为 stimuli-responsive functionalized latex nanoparticles: the effect of
spiropyran concentration on size and photochromic properties.[J].
3.2 μm 的密封性良好的光致变色壳聚糖微胶囊。该 Langmuir the ACS Journal of Surfaces & Colloids, 2015, 31(39):
10672-10682.
光致变色壳聚糖微胶囊对热有良好的阻隔作用，能 [11] Nigel C S, Partington S M, Towns A D. Industrial organic
photochromic dyes[J]. Coloration Technology, 2009, 125(5): 249-261.
够耐受 300 ℃左右的高温。 [12] Li M, Zhang Q, Zhu S. Photo-inactive divinyl spiropyran
mechanophore cross-linker for real-time stress sensing[J]. Polymer,
（2）在等强度太阳光照射下，光致变色染料达 2016, 99: 521-528.
到变色稳态的时间为 4.00 s，光致变色微胶囊达到 [13] Makled W A, Tahoun S S. Digital quantification of the miospore
coloration to assess the thermal maturity: Novel RGB-based
变色稳态的时间为 4.25 s。在同等条件下遮蔽太阳 measuring technique[J]. Marine & Petroleum Geology, 2015, 67: 1-15.
[14] Yang Qiang (杨强), Huang Jianfeng (黄剑锋). Developments and
光后，光致变色染料达到褪色稳态的时间为 22 s， applications of sonochemical method in preparation of nanomaterials
光致变色微胶囊达到褪色稳态的时间为 26 s。与光 [J]. Chemical Industry and Engineering Progress (化工进展), 2010,
29(6): 1091-1095.
致变色染料相比，光致变色壳聚糖微胶囊达到变、 [15] Cgt N, Giacometti J A, Job A E, et al. Thermal analysis of chitosan
based networks[J]. Carbohydrate Polymers, 2005, 62(2): 97-103.
褪色稳态的时间并未受到较大影响，仍具有良好的 [16] Ou Minhua (欧敏华), Zhang Yongde (张永德), Luo Xuegang (罗学
刚), et al. Fabrication of electrostatic self-assembly chitosan hollow
光变色灵敏性。 microcapsules and study of its loading and releasing properties[J].
Chemical Industry and Engineering Progress (化工进展), 2017,
36(5): 1848-1854.
参考文献： [17] Cong Y, Chen K, Zhou S, et al. Synthesis of pH and UV
[1] Cheng T, Lin T, Brady R, et al. Fast response photochromic textiles dual-responsive microcapsules with high loading capacity and their
from hybrid silica surface coating[J]. Fibers and Polymers, 2008, application in self-healing hydrophobic coatings[J]. Journal of
9(3): 301-306. Materials Chemistry A, 2015, 3(37): 19093-19099.