响应面法优化戊二醛交联木薯淀粉的制备及结构表征
目的 以木薯淀粉为原料, 戊二醛为交联剂, 采用响应面发优化制备交联淀粉。方法 以沉淀积为评价指标, 在单因素试验的基础上, 采用响应面分析法, 确定合成木薯交联淀粉的最优工艺。在此基础上, 采用现代分析技术对其结构进行了表征。结果 木薯交联淀粉制备的最佳条件为, 固定反应时间为30 min、交联剂用量为5.6%、温度为93 ℃和pH值为4, 获得样品的沉降积约0.82 mL。此时扫描电子显微镜(scanning electron microscope, SEM)结果表明交联反应使原淀粉的颗粒形态发生变化, 多呈不规则形态; 傅里叶变换红外光谱仪(Fourier transform infrared spectrometer, FTIR)证实木薯淀粉分子之间成功交联; X-射线衍射(X-ray diffraction, XRD)结果表明交联木薯淀粉结晶结构破坏, 使结晶区非晶化。结论 本研究制备的交联淀粉性能较好, 且有效提升其附加值。
Objective With cassava starch as raw material and glutaraldehyde as cross-linking agent, to optimize the preparation of crosslinked starch by response surface method. Methods The optimum process for synthesizing cross-linked cassava starch was obtained based on single factor test and response surface methodology. The structure of the samples was characterized by the analytical techniques. Results The optimum conditions for the preparation of cross-linked cassava starch were as follows: the fixed reaction time of 30 min, the dosage of cross-linking agent of 5.6%, temperature of 93 ℃ and pH of 4. Under these conditions, the sedimentation volume of obtained samples was approximately 0.82 mL. Scanning electron microscope (SEM) analysis showed that the cross-linking reaction resulted in the change of the granule morphology of the starch, and showed a certain cross-linking network structure. Fourier transform infrared spectrometer (FTIR) proved that the cassava starch molecules were successfully cross-linked. X-ray diffraction (XRD) analysis showed that the crystal structure of cross-linked cassava starch was destroyed so that its crystallization zone was amorphous. Conclusion The cross-linked starch prepared in this study has good properties and effectively improves its added value.
标题：响应面法优化戊二醛交联木薯淀粉的制备及结构表征
英文标题：Optimization of preparation and structure characterization of glutaraldehyde cross-linked tapioca starch by response surface method
作者：
刘璟衔 广东石油化工学院,生物与食品工程学院
张玲 广东石油化工学院,生物与食品工程学院
杨海英 广东石油化工学院,生物与食品工程学院
张钟 广东石油化工学院,生物与食品工程学院
陈佳文 汕头市广油美联新材料研究院,广东美联新材料股份有限公司
谢亚水 汕头市广油美联新材料研究院,广东美联新材料股份有限公司
彭地纬 湖南普菲克生物技术有限公司
徐井水 广东石油化工学院,生物与食品工程学院；汕头市广油美联新材料研究院,广东美联新材料股份有限公司
中文关键词:木薯淀粉,戊二醛,交联淀粉,响应面设计,
英文关键词:cassava starch,glutaraldehyde,cross-linked starch,response surface design,
发表日期：2019-08-15
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