琥珀酰化
淀粉
结晶度
抗性淀粉
水分
变性淀粉
含水量
化学
溶解度
化学工程
傅里叶变换红外光谱
材料科学
食品科学
核化学
有机化学
生物化学
基因
乙酰化
工程类
岩土工程
结晶学
作者
Angela Myrra Puspita Dewi,Umar Santoso,Yudi Pranoto,Djagal Wiseso Marseno
出处
期刊:Polymers
[Multidisciplinary Digital Publishing Institute]
日期:2022-03-08
卷期号:14 (6): 1086-1086
被引量:16
标识
DOI:10.3390/polym14061086
摘要
To elucidate the pretreatment of a heat moisture treatment that could increase the DS and hydrophobicity of OSA starch, the effect of the moisture level of the HMT process on the physicochemical properties was investigated. The higher moisture content (MC) in the HMT process led to a decreasing degree of crystallinity and gelatinization enthalpy and also produced surface damage and cracking of the granules. HMT pretreatment with the right moisture content resulted in OSA starch with the maximum DS value and reaction efficiency. Pre-treatment HMT at 25% MC (HMT-25) followed by OSA esterification exhibited the highest DS value (0.0086) and reaction efficiency (35.86%). H25-OSA starch has been shown to have good water resistance (OAC 1.03%, WVP 4.92 × 10-5 g/s m Pa, water contact angle 88.43°), and conversely, has a high cold water solubility (8.44%). Based on FTIR, there were two new peaks at 1729 and 1568 cm-1 of the HMT-OSA starch, which proved that the hydroxyl group of the HMT starch molecule had been substituted with the carbonyl and carboxyl ester groups of OSA.
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