摘要
本研究通过在乙醇水溶液中酶解V型颗粒态淀粉(V-type granular starch,VGS)得到了一种具有高吸油率的V型多孔淀粉(V-type porous starch,VPS)。以吸油率和V型结晶度为指标,优化了VGS的制备条件,在50%乙醇水溶液中,100℃下反应得到的VGS吸油率最高(176.23%);探究了在50%乙醇溶液中,酶解时间、反应温度和转速对VGS水解度以及VPS得率和吸油率的影响,通过单因素和正交得到了高吸油率VPS的制备条件:酶解时间4 h,反应温度25℃,反应转速300 r/min,VPS吸油率高达550.28%;比较了普通玉米淀粉、传统A型多孔淀粉、VGS和新型VPS的结晶结构、颗粒形态、比表面积以及堆积密度的差异,发现VPS颗粒呈现独特海绵状不规则的密集蜂窝结构,比表面积最高(39.94 m2/g),堆积密度最低(0.19 g/cm3),这是其高吸油率的原因。
In this research,V-type porous starch(VPS)with high oil absorption capacity was obtained by enzymatic hydrolysis of V-type granular starch(VGS)in ethanol aqueous solution.Firstly,the reaction condition of V-type granular starch(VGS)was optimized with oil absorption capacity and V-type crystal crystallinity as indexes.In 50%ethanol,aqueous solution the oil absorption capacity of VGS obtained by reaction 100℃was the highest(176.23%).Then,the influence of enzymatic hydrolysis time,temperature and speed on the degree of hydrolysis,yield and oil absorption capacity of VPS were investigated.The optimal preparation conditions of VPS were obtained through single factor and orthogonal experiments:enzymatic hydrolysis time 4 h,temperature 25℃,and enzymatic hydrolysis speed 300 r/min.The oil absorption capacity of the optimal VPS was the highest(550.28%).Finally,the difference in the crystalline structure,granular morphology,specific surface area and bulk density were compared among normal maize starch(NMS),traditional A-type porous starch,VGS and VPS.VPS exhibited a unique sponge shaped irregular dense honeycomb structure,the highest specific surface area(39.94 m2/g)and the lowest bulk density(0.19 g/cm3),which were the reasons for its higher oil absorption capacity.
作者
蒙悦
常庆
梁晓丽
李佳欣
金征宇
周星
MENG Yue;CHANG Qing;LIANG Xiao-li;LI Jia-xin;JIN Zheng-yu;ZHOU Xing(School of Food Science and Technology,Jiangnan University,Wuxi,Jiangsu 214122,China)
出处
《粮油食品科技》
CAS
CSCD
2023年第3期15-23,共9页
Science and Technology of Cereals,Oils and Foods
关键词
V型颗粒态淀粉
醇水热处理
醇相酶解
V型多孔淀粉
吸油率
V-type granular starch
aqueous-ethanol heat treatment
ethanol-phase enzymatic hydrolysis
V-type porous starch
oil absorption capacity
