机械活化对玉米淀粉结晶结构与化学反应活性的影响
Mechanical activation effects on crystal structure and chemical reaction activity of maize starch
查看参考文献21篇
|
文摘
|
采用搅拌球磨机对玉米淀粉进行机械活化,用X射线衍射仪、差示扫描量热仪、扫描电子显微镜及粒度分析仪等考察了机械活化对玉米淀粉结晶结构、热特性、颗粒形貌及粒度变化的影响.并将不同活化时间的玉米淀粉在相同条件下与乙酸酐进行酯化反应及与丙烯酰胺进行接枝共聚反应,通过研究机械活化对酯化反应取代度、接枝共聚反应接枝率与接枝效率的影响规律来探讨机械活化对玉米淀粉化学反应活性的影响.结果表明,机械活化预处理能显著提高玉米淀粉酯化反应的取代度及接枝共聚反应的接枝率与接枝效率,说明机械活化能有效地提高玉米淀粉的化学反应活性.其原因是玉米淀粉在机械活化过程中其结晶结构与颗粒形貌均受到破坏,结晶度降低,最终由多晶态转变成非晶态.并随活化时间的延长,糊化温度及糊黏度下降,流动性增强,从而使反应试剂的扩散阻力下降,易于扩散到淀粉分子中参与反应 |
|
其他语种文摘
|
Maize starch was mechanically activated by a stirring-type ball mill.The effects of mechanical activation on crystal structure,thermal properties,granule shape and particle size of maize starch were examined by means of X-ray diffraction,differential scanning calorimetry,scanning electron microscope and particle size analyzer.Moreover,mechanically activated maize starch(MAMS)with different activation times was acetylated with acetic anhydride and graft-copolymerized with acrylamide under the same experimental conditions.The mechanical activation effects on chemical reaction activity of maize starch were investigated by analyzing the influence of mechanical activation on degree of substitution(DS)of esterification and grafting rate(G)and grafting efficiency(GE)of graft copolymerization.The results indicated that the DS,G and GE of MAMS were higher than that of native starch,and showed obviously enhanced chemical reaction activity of maize starch by mechanical activation.The crystal structure and compact granule surface of maize starch were destroyed by mechanical activation,and the crystallinity decreased from polycrystalline to amorphous.With increasing activation time,the gelatinization temperature and pastes viscosity of MAMS decreased and its fluidity was enhanced.As a consequence,the resistance of reagents diffusing into starch solution would be reduced and it was easier to diffuse into starch intramolecule.
|
|
来源
|
化工学报
,2007,58(5):1307-1313 【核心库】
|
|
关键词
|
玉米淀粉
;
机械活化
;
结晶结构
;
化学反应活性
;
乙酸酯化
;
接枝共聚
|
|
地址
|
广西大学化学化工学院, 广西, 南宁, 530004
|
|
语种
|
中文 |
|
文献类型
|
研究性论文 |
|
ISSN
|
0438-1157 |
|
学科
|
化学;化学工业;轻工业、手工业、生活服务业 |
|
基金
|
国家自然科学基金项目
;
广西科学基金
;
广西大学基金
|
|
文献收藏号
|
CSCD:2796691
|
参考文献 共
21
共2页
|
|
1.
Christopher G O. Towards an understanding of starch granule structure and hydrolysis.
Trends in Food Science&Technology,1997,8:375-382
|
被引
27
次
|
|
|
|
|
2.
何小维. 超声处理后的玉米淀粉与环氧丙烷的反应机理.
华南理工大学学报:自然科学版,2005,33(8):91-94
|
被引
10
次
|
|
|
|
|
3.
Shogren R L. Modification of maize starch by thermal processing in glacial acetic acid.
Carbohydrate Polymers,2000,43(4):309-315
|
被引
8
次
|
|
|
|
|
4.
Cao Y M. Graft copolymerization of acrylamide onto carboxymethyl starch.
European Polymer Journal,2002,38(9):1921-1924
|
被引
12
次
|
|
|
|
|
5.
Achremowicz B. Air oxidation of potato starch over Cu(Ⅱ)catalyst.
Carbohydrate Polymers,2000,42(1):45-50
|
被引
3
次
|
|
|
|
|
6.
孙建平. 改性淀粉与乙烯基单体的接枝共聚反应.
高分子材料科学与工程,2003,19(2):89-92
|
被引
4
次
|
|
|
|
|
7.
吕生华. 降解淀粉与乙烯基类单体接枝聚合物的合成及应用.
精细化工,2001,18(5):281-283
|
被引
5
次
|
|
|
|
|
8.
Mostafa K M. Graft polymerization of methacrylic acid on starch and hydrolyzed starches.
Polymer Degradation and Stability,1995,50(2):189-194
|
被引
4
次
|
|
|
|
|
9.
Shogren R L. Rapid preparation of starch esters by high temperature/pressure reaction.
Carbohydrate Polymers,2003,52(3):319-326
|
被引
8
次
|
|
|
|
|
10.
陈鼎. 机械力化学技术研究进展.
稀有金属,2003,27(2):293-298
|
被引
29
次
|
|
|
|
|
11.
籍凤秋. 硼碳氮纳米管的制备及其表征.
化工学报,2005,56(2):363-367
|
被引
4
次
|
|
|
|
|
12.
李春. 机械活化方式对攀枝花钛铁矿浸出强化作用.
化工学报,2006,57(4):832-837
|
被引
12
次
|
|
|
|
|
13.
黄祖强. 机械活化法制备冷水可溶性玉米淀粉的工艺研究.
食品与发酵工业,2005,31(12):1-3
|
被引
11
次
|
|
|
|
|
14.
黄祖强. 机械活化对木薯淀粉的溶解度及流变学特性的影响.
高校化学工程学报,2006,20(3):449-454
|
被引
24
次
|
|
|
|
|
15.
Elomaa M. Determination of the degree of substitution of acetylated starch by hydrolysis 1H NMR and TGA/IR.
Carbohydrate Polymers,2004,57(3):261-267
|
被引
23
次
|
|
|
|
|
16.
尚小琴. 反相乳液法淀粉丙烯酰胺接枝共聚反应的研究.
高校化学工程学报,2006,20(3):460-463
|
被引
20
次
|
|
|
|
|
17.
Lai H M. Effects of hydrothermal treatment on the physicochemical properties of pregelatinized rice flour.
Food Chemistry,2001,72(4):455-463
|
被引
6
次
|
|
|
|
|
18.
张本山. Study on the melting characters of starch crystal.
郑州工程学院学报,2001,22(4):15-18
|
被引
2
次
|
|
|
|
|
19.
潘松汉. Effect of starch gelatinization on graft copolymerization of starchacrylamide.
精细化工,1993,10(4):56-60
|
被引
4
次
|
|
|
|
|
20.
Boldyrev V V. Mechanical activation of solid and its application to technology.
Journal de Chimie Physique,1986,83(11/12):821-829
|
被引
12
次
|
|
|
|
|
了解气象卫星更多信息，请访问