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Preparation of Lauric Acid Modified High-Amylose Cornstarch by a Solvothermal Process and Its Pickering Emulsion
ACS Food Science & Technology ( IF 2.6 ) Pub Date : 2021-05-12 , DOI: 10.1021/acsfoodscitech.1c00058 Yanhong Chen 1 , Yu Liu 1 , Huitao Liu 1 , Yuan Gao 1
ACS Food Science & Technology ( IF 2.6 ) Pub Date : 2021-05-12 , DOI: 10.1021/acsfoodscitech.1c00058 Yanhong Chen 1 , Yu Liu 1 , Huitao Liu 1 , Yuan Gao 1
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Based on the esterification of starch with fatty acids, high-amylose cornstarch (HACS) was modified with lauric acid (LA) by an ethanol solvothermal system. Using its relatively high temperature and a closed environment to improve the modification effect, the water contact angles of HACS increased from 44.5° of the original HACS to 79°, and the hydrophobicity of modified HACS (LA-HACS) was enhanced. Pickering emulsion was prepared by LA-HACS particle, corn oil, and water. Experimental results show that the oil fraction is 30% (v/v) and the addition of LA-HACS is greater than 40 mg/mL; a stable Pickering emulsion can be prepared. When the amount of LA-HACS is 55 mg/mL, the volume mean diameter (D43) of droplets reaches the minimum value of 8.68 μm at pH 9, and the absolute value of zeta-potential is 69.5 mV. Emulsion indices of the emulsion after 28 days was only 3.2% lower than that at 7 days, and there was no oil separation or demulsification. Therefore, the solvothermal system provides an effective and simple method to prepare starch particles for Pickering emulsion, having a practical potential in food products.
中文翻译：
溶剂热法制备月桂酸改性高直链淀粉及其Pickering乳液
基于淀粉与脂肪酸的酯化，通过乙醇溶剂热系统用月桂酸（LA）改性高直链玉米淀粉（HACS）。利用其相对较高的温度和封闭的环境来提高改性效果，HACS的水接触角从原来的44.5°增加到79°，改性HACS（LA-HACS）的疏水性得到增强。Pickering乳液由LA-HACS颗粒、玉米油和水配制而成。实验结果表明，油分率为30%（v/v），LA-HACS的添加量大于40 mg/mL；可以制备稳定的Pickering乳液。当LA-HACS的量为55 mg/mL时，液滴的体积平均直径（D43）在pH 9时达到最小值8.68 μm，zeta电位的绝对值为69.5 mV。28天后乳液的乳化指数仅比7天时低3.2%，且无油分离和破乳现象。因此，溶剂热系统为制备Pickering乳液淀粉颗粒提供了一种有效且简单的方法，在食品中具有实用潜力。
更新日期：2021-06-18
中文翻译：
溶剂热法制备月桂酸改性高直链淀粉及其Pickering乳液
基于淀粉与脂肪酸的酯化，通过乙醇溶剂热系统用月桂酸（LA）改性高直链玉米淀粉（HACS）。利用其相对较高的温度和封闭的环境来提高改性效果，HACS的水接触角从原来的44.5°增加到79°，改性HACS（LA-HACS）的疏水性得到增强。Pickering乳液由LA-HACS颗粒、玉米油和水配制而成。实验结果表明，油分率为30%（v/v），LA-HACS的添加量大于40 mg/mL；可以制备稳定的Pickering乳液。当LA-HACS的量为55 mg/mL时，液滴的体积平均直径（D43）在pH 9时达到最小值8.68 μm，zeta电位的绝对值为69.5 mV。28天后乳液的乳化指数仅比7天时低3.2%，且无油分离和破乳现象。因此，溶剂热系统为制备Pickering乳液淀粉颗粒提供了一种有效且简单的方法，在食品中具有实用潜力。
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