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第 35 卷第 7 期                             精   细   化   工                                  Vol.35, No.7
             201 8 年 7 月                             FINE CHEMICALS                                 July  2018


              功能材料
               α-纤维素/魔芋葡甘聚糖复合水凝胶的制备及其性能



                                                                     3*
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                               1
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                     刘子奇 ,王   林 ,王维海 ,杨金初 ,吴先辉                                     2,4* ,庞   杰
                 (1.  福建农林大学  材料工程学院,福建  福州  350000;2.  福建农林大学  食品科学学院,福建  福州
                 350000;3.  河南中烟工业有限责任公司技术中心,河南  郑州  450000;4.  宁德职业技术学院,福建  福
                 安  355000)
                 摘要:为提高魔芋葡甘聚糖(Konjac glucomannan,KGM)凝胶的热稳定性和凝胶强度,通过与 α-纤维素
                 (α-Cellulose,α-CE)按不同比例复配制得 α-CE/KGM 复合水凝胶。使用旋转流变仪测定加入不同量 α-CE 对复
                 合水凝胶流变特性的影响,利用 SEM、FTIR 和 DSC 表征了 α-CE/KGM 水凝胶的表观形貌、微观结构、特征官
                                                                                                     –1
                 能团及其热稳定性。结果显示:KGM 溶胶和 α-CE/KGM 溶胶的黏度随剪切速率的增大而减小;在 0~300 s 剪
                 切速率内,剪切应力随剪切速率的增大而增大;在 0.1~100 Hz 频率内,α-CE/KGM 的储能模量(G)低于其损
                 耗模量(G),α-CE 的添加使复合水凝胶的模量升高。在不同质量比的 α-CE/KGM 凝胶体系中,当 m(α-CE)∶
                 m(KGM)=1∶1(即 α-CE4)时得到的复合水凝胶,熔融吸收峰对应的温度为 122.3 ℃,热稳定性较 KGM 水凝
                 胶有所提高。
                 关键词:魔芋葡甘聚糖;α-纤维素;复合水凝胶;流变性能;热稳定性;功能材料
                 中图分类号:TQ314      文献标识码:A     文章编号:1003-5214 (2018) 07-1131-06


                               Preparation and Properties of α-Cellulose/Konjac

                                       Glucomannan Composite Hydrogels

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                     LIU Zi-qi , WANG Lin , WANG Wei-hai ,YANG Jin-chu , WU Xian-hui  2,4* , PANG Jie
                 (1. College of Material Engineering, Fujian Agriculture and Forestry University, Fuzhou 350000, Fujian, China; 2. College
                 of Food Science, Fujian Agriculture and Forestry University, Fuzhou 350000, Fujian, China; 3. Technology Center, China
                 Tobacco Henan Industrial Co., Ltd., Zhengzhou 450000, Henan, China; 4. Ningde Vocational and Technical College, Fuan
                 355000, Fujian, China)
                 Abstract:  α-CE/KGM composite hydrogels were  prepared by mixing  konjac glucomannan  (KGM) and
                 α-cellulose (α-CE) in  different  proportions to improve the thermal stability and gel strength  of  KGM
                 hydrogels. The influence of added amount of  α-CE on the rheological properties of the KGM gels was
                 discussed by rotational rheometer. The surface morphology, microstructure, characteristic functional groups
                 and thermal stability of  α-CE/KGM hydrogels were characterized by SEM, FTIR and  DSC. Results
                 revealed that the  viscosity of  KGM sol  solution  decreased  with the increase of  shear  rate, and that of
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                 α-CE/KGM sol solution displayed the same trend. When the shear rate was in the range of 0 to 300 s , the
                 shear stress increased with the increase of shear rate. At the selected frequency from 0.1 to 100 Hz, the
                 storage modulus (G) of α-CE/KGM was lower than its loss modulus (G). Moreover, the addition of α-CE
                 increased the modulus of composite hydrogels. Especially when the mass ratio of α-CE to KGM was 1∶1,
                 the resulting hydrogel (α-CE4) showed a melting absorption peak of  122.3  ℃, indicating that the
                 introduction of α-CE improved the thermal stability of composite hydrogel.
                 Key words: konjac glucomannan; α-cellulose; composite hydrogel; rheological property; thermal stability;
                 functional materials
                 Foundation items: Natural Science Foundation of China (31471704); Natural Science Foundation of Fujian

                 收稿日期:2017-07-24;  定用日期:2018-01-12; DOI: 10.13550/j.jxhg.20170600
                 基金项目:国家自然科学基金(31471704);福建省自然科学基金(2018J01142,2017J01155);宁德市科技计划项目(2017137)
                 作者简介:刘子奇(1997—),女,本科生。联系人:杨金初(1987—),男,硕士,工程师,E-mail:yjinchu@163.com;吴先辉(1972
                 —),男,硕士,教授,E-mail:1141091857@qq.com;庞   杰(1965—),男,博士,研究员,E-mail:pang3721941@163.com。
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