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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
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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
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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。