摘要
研究了天然高分子魔芋葡甘露聚糖加碱去乙酰基改性,考察了不同碱处理时间对魔芋葡甘聚糖(KGM)膜力学性能及纳米尺度微观形貌特征的影响,单因素方差分析表明,不同碱处理时间对KGM膜力学性能与膜面AFM形貌图像三维粗糙度数字化参数——均方根粗糙度(RM S)、平均面粗糙度(R a)、最大高低差(P-V)、表面积(S)、表面积率(S ra tio)、10点平均粗糙度(R z)等的影响并不相同,其中,对KGM膜耐折度(FE)与RM S、R a、R z参数具有显著影响(P<0.05),对KGM膜断裂强度(TS)与S、S ra-tio参数具有极显著的影响(P<0.01),而对KGM膜P-V参数的影响不显著(P>0.05);去乙酰基改性制膜工艺——加碱反应时间的差异能显著影响KGM膜的力学性能,并通过除P-V之外的膜面形貌数字化参数的显著变化表现出来。
Deacetyl Modification of Koniac Glucomannan （KGM） by alkali and the effects of different times of alkali treatment on mechanical properties and nanometer-scale micromorphological features of membranes from KGM were explored. One-way ANOVA revealed that various times of alkali treatment of KGM showed different effects on mechanical properties of KGM membranes and their digital parameters, which included RMS, Ra, P-V, S, S ratio and Rz of the membrane＇s AFM image. The latter were used to describe their micromorphological features. Alkali treatment time affected folding endurance and RMS, Ra, Rz significantly （P〈 0.05）, and affected tensile strength, S, and S ratio to the greatest extent （P〈0.01）, but did not affect P-V to a significant degree （P〉0.05）. Preparation process differences of deacetyl modification of KGM-varieties of alkali treatment time influenced remarkably mechanical properties and were exhibited by obvious digital parameters diversities of membrane micromorphology of KGM except P-V.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2006年第1期237-240,245,共5页
Polymer Materials Science & Engineering
基金
国家自然科学基金(29876017)
