Effect of ethanol concentration on the physicochemical properties of waxy corn starch treated by hydrochloric acid
Effect of ethanol concentration on the physicochemical properties of waxy corn starch treated by hydrochloric acid
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DOI：
10.1016/j.carbpol.2004.04.008
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发表时间：
2004-08
影响因子：
11.2
通讯作者：
Yung-Ho Chang;Jheng-Hua Lin;C. Lii
中科院分区：
文献类型：
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作者：
Yung-Ho Chang;Jheng-Hua Lin;C. Lii
糯玉米淀粉在含0.36%或1.39%HCl的50%、70%或90%乙醇溶液中65℃处理1h，淀粉回收率大于96%。处理后淀粉的平均粒径、最大碘显色波长(λmax)、糊化粘度、糊化起始温度(TO)、平均相对分子质量和平均链长均有所降低，但X-射线衍射图变化不明显，溶解度增加。处理后淀粉糊化粘度、TO、平均相对分子质量和溶解度的变化随乙醇浓度和酸浓度的增加而增大。结果表明，酸乙醇处理的蜡质淀粉的溶解度是T/To的函数(T是测定溶解度的温度)。在T/Toelow 1.2时，淀粉的溶解度与T/To值呈线性相关(R2=0.984)。
Waxy corn starch was treated in 50, 70 or 90% of ethanol solutions containing 0.36 or 1.39% HCl at 65 °C for 1 h. The recovery yields of treated starch were higher than 96%. The average granule size, maximum wavelength of the spectrum of iodine coloration (λmax), pasting viscosity, gelatinization onset temperature (To), average molecular weight and average chain length of starch decreased after treated, while no obvious change on X-ray diffraction pattern and increase in solubility of treated starch was also found. The changes on pasting viscosity, To, average molecular weight and solubility of treated starch increased with increasing ethanol and acid concentrations. It was found that the solubility of acid–ethanol treated waxy starch was a function of T/To(T was the temperature used for solubility measurement). At T/Tobelow 1.2, the solubility of starch linearly correlated with T/Tovalue (r2=0.984).