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·1528·                            精细化工   FINE CHEMICALS                                  第 35 卷

            指数越大,相对分子质量分布越广,当 PDI 在 1.10~                      参考文献:
            1.5 之间,说明是逐步合成的聚合物,与扫描结果(图                         [1]   Jang W D, Hwang J H, Kim  H  U,  et al. Bacterial  cellulose as an
            3b)相吻合。低相对分子质量的细菌纤维素有更好                                example product for sustainable production and consumption[J].
                                                                   Microbial Biotechnology, 2017, 10(5), 1181-1185.
            的生物相容性及生物可降解性,同时其负载量更高,                            [2]   Fu L, Zhang J, Yang G. Present status and applications of bacterial
            释放速度更快,使其在化妆品、药物输送及生物组                                 cellulose-based materials for skin tissue repair[J]. Carbohydrate
                                                                   polymers, 2013, 92(2): 1432-1442.
            织工程方面表现出巨大的应用潜力                [18] 。
                                                               [3]   Paximada P, Tsouko E, Kopsahelis N,  et al. Bacterial cellulose as
            2.3.2   其他性能测试结果                                       stabilizer of o/w emulsions[J]. Food Hydrocolloids, 2016, 53: 225-
                 通过拉伸实验得知,BC 面膜的拉伸强度为 1.27                         232.
                                                               [4]   Arevalo G A M, Herrera C S, Parra R, et al. Bacterial cellulose: A
            MPa,断裂伸长率为 16.29%,说明 BC 面膜具有较                          sustainable source to  develop value-added  products-a review[J].
                                                13
            高的结晶度,与 X 射线衍射、CP/MAS  CNMR 结                          Bioresources 2016, 11(2): 5641-5655.
                                                               [5]   Alves V D, Torres C A V, Freitas F. Bacterial polymers as materials
            果相一致。因为结晶程度越高,结构更加完整,也                                 for the development of micro/nanoparticles[J]. International Journal
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            就具有更大的拉伸强度和较低的断裂伸长率 ,所                                 of Polymeric Materials and  Polymeric Biomaterials,2016, 65  (5):
            以在稍大的外力作用下不易发生变形,结构也不宜                                 211-224.
                                                               [6]   Zhang Mingnan (张名楠), Li Haifang (刘海芳), HanYali (韩亚丽), et al.
            发生明显变化。以 BC 作为面膜基质,不仅能够与                               Synthesis and characterization of bacterial cellulose membrane[J]. Fine
            脸部紧密结合,而且三维网络孔洞中所持有的营养                                 Chemicals (精细化工), 2014, 31(4): 409-417.
                                                               [7]   Zhang W, Chen S, Hu W,  et al.  Facile fabrication  of flexible
            精华液不易侧流,从而增加使用者的体验度。BC 面                               magnetic nanohybrid membrane with amphiphobic surface based on
            膜含水率高达 99%,因为水分不仅储存在 BC 湿膜                             bacterial cellulose[J]. Carbohyd Polym, 2011, 86(4): 1760-1767.
                                                               [8]   Wang Lei (王蕾), Wu Xujun (吴旭君), Chen Shiyan (陈仕艳), et al.
            的三维网状孔洞中,还可以通过氢键作用与 BC 湿
                                                                   Preparation of hyaluronic acid-bacterial cellulose biological
            膜上的大量羟基结合,使其固定更多的水分,所以                                 maskbyin situ modification[J]. MaterialsReview (材料导报), 2015,
            具有很好的持水能力。                                             29(12): 43-47.
                                                               [9]   Ministry of chemical industry (化学工业部). Test method for water
                 气体或蒸汽在聚合物中的传输速率主要取决于                              vapor permeability of plastic films and sheets (Cup method) (塑料薄
            结晶度,结晶度越高,渗透性越低,因为与无定形                                 膜和片材透水蒸气性试验方法(杯式法)): GB/T1037—1989[S].
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            区域相比,结晶区域是相对不可渗透的                   [12] 。化学合
                                                               [10]  The Quality and Technology Supervision Bureau (国家质量技术监
                                                     2
            成聚合物通常具有较低的 WVTR〔18~20 g/(m ·d)  〕                     督局 ). Plastic film  and sheet gas permeability test method -
                                   3
                                      2
            和 OTR〔8000~14000 cm /(m ·d·0.1MPa)〕,实验                 differential  pressure method (塑料薄膜和薄片气体透过性试验方
                                                                   法-压差法): GB/T 1038—2000[S].Beijing:Standards Press of China,
                                                       2
            中测出 WVTR 和 OTR 分别为 656.15±3.92g/(m ·d)                 2000: 3-5.
                                 2
                             3
            和 913.55±3.23 cm / (m ·d·0.1 MPa),其结果与上述           [11]  Lopes T D, Riegel-Vidotti I C, Grein A, et al. Bacterial cellulose and
                                                                   hyaluronic acid hybrid membranes: production and characterization
            描述相反。结果中低 OTR 值表明,该薄膜具有低渗                              [J]. International Journal of Biological Macromolecules,  2014, 67:
            透性高结晶度;OTR 值大于 WVTR 值,说明该薄膜                            401-408.
                                                               [12]  Rani M U, Udayasankar K, Appaiah K A. Properties of bacterial
            能够有效地锁住水分,防止水分的蒸发,同时能够
                                                                   cellulose produced in grape medium by native isolate Gluconacetobacter
            保证肌肤表皮细胞正常呼吸,有利于排除新陈代谢                                 sp[J]. Journal of Applied Polymer Science, 2011, 120(5): 2835-2841.
            产物,使营养成分更有效地进入皮肤。                                  [13]  Pacheco G, De C M, Chiariandréo B G, et al. Bacterial cellulose skin
                                                                   masks-Properties and sensory tests[J]. Journal of Cosmetic
                                                                   Dermatology, 2017: 1-8. DOI: 10.1111/jocd.12441.
            3    结论                                            [14]  Colom X, Carrillo F, Nogués F,  et al. Structural analysis of
                                                                   photodegraded wood by  means of FTIR spectroscopy[J]. Polymer
                 以常压室温等离子体(ARTP)诱变的葡糖醋杆                            Degradation and Stability, 2003, 80(3): 543-549.
                                                               [15] ChenJiaxiang (陈嘉翔). PulpingChemistry (制浆化学)[M]. Beijing:
            菌 G31(Gluconacetobacter xylinum G31)为菌种经
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            静态发酵制备 BC 面膜,产物呈空隙小于 3 m 的超                       [16]  Ridout M J, Brownsey G J, Gunning A P, et al. Characterization of
            细三维网状结构,属纤维素Ⅰ型,结晶度为 92.42%,                            the polysaccharide produced by Acetobacter xylinum strain CR1 /4
                                                                   by light scattering and atomic force  microscopy[J]. International
            具有良好的拉伸性能。同时测试结果表明,该 BC                                Journal of Biological Macromolecules, 1998, 23(4): 287-293.
            面膜的平均相对分子质量为 5737,属于低分子质量                          [17]  Yan Zhiyong (颜志勇), WangHuaping (王华平), ChenShiyan (陈仕
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            BC,低 OTR 值,高 WVTR 值,使其具有较高的负                           (材料导报), 2008,(8): 127-130,135.
            载量,在化妆品、药物输送及生物组织工程方面表                             [18]  Dou xiaoqiu (窦晓秋), Zhang Di (张荻), Feng Chuanliang (冯传良).
                                                                   Researchand progress of low molecular weight gelators[J]. Science
            现出巨大的应用潜力,并为细菌纤维素在面膜领域
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            的应用奠定了基础。                                              286-295.
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