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首页> 外文会议>Eco-materials processing and design XI >Studies on the Molecular Chain Conformation and Morphology of Konjac Glucomannan in Aqueous Solution
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Studies on the Molecular Chain Conformation and Morphology of Konjac Glucomannan in Aqueous Solution

机译：魔芋葡甘露聚糖在水溶液中的分子链构象与形态研究

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摘要

The molecular chain conformation of konjac glucomannan (KGM) was studied by multi-angle laser light scatter (MALLS) and differential refractive index detector (RI) with GPC. The absolute Molecular weight (M_w), toot-mean-square ratio of gyration (＜S～2＞～(1/2)), second viral coefficient and molecular weight distribution (MWD) were 5.38×l0～5g·mol～(_1), 201.9 nm, 1.18×l0～(-2) mol mL g～(-2)and 1.07, respectively by MALLS when KGM concentration was 1 mg mL～(-1). RI with GPC was used to determine M_w and MWD of five different concentration of KGM aqueous solution. M_w varied from 7.46×10～5 to 6.34×10～5 g·mol～(-1) when KGM concentration ranged from 0.05 to 1.00 mg mL～(-1), but MWD was all about 1.06. Mark-Houwink equation was established as η=5.19×10～(-3) M_w～0.92. The morphology of konjac glucomannan was observed by atomic force microscope (AFM), transmission electron microscope (TEM) and scanning electron microscope (SEM). The image showed that KGM in aqueous solution was displayed with reticulation. The results obtained show that KGM in aqueous solution is displayed with reticulation; molecular chain is rigid; molecular scale increases with decreasing KGM concentration in aqueous solution.
机译：通过多角度激光散射（MALLS）和差示折光检测器（RI）和GPC对魔芋葡甘露聚糖（KGM）的分子链构象进行了研究。绝对分子量（M_w），回转的嘟嘟均方比（＜S〜2＞〜（1/2）），第二病毒系数和分子量分布（MWD）为5.38×l0〜5g·mol〜（当KGM浓度为1 mg mL〜（-1）时，用MALLS分别测定_1），201.9 nm，1.18×l0〜（-2）mol mL g〜（-2）和1.07。 RI与GPC一起用于测定五种不同浓度的KGM水溶液的M_w和MWD。当KGM浓度为0.05〜1.00 mg mL〜（-1）时，M_w为7.46×10〜5〜6.34×10〜5 g·mol〜（-1），但MWD均为1.06。建立Mark-Houwink方程，η= 5.19×10〜（-3）M_w〜0.92。通过原子力显微镜（AFM），透射电子显微镜（TEM）和扫描电子显微镜（SEM）观察魔芋葡甘露聚糖的形态。图像显示水溶液中的KGM呈网状显示。所得结果表明，水溶液中的KGM呈网状显示。分子链是刚性的；随着水溶液中KGM浓度的降低，分子规模增加。

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  • 来源
  • 会议地点 Osaka(JP);Osaka(JP)
  • 作者

    Xiaoyan Long; Xuegang Luo; Ju Bai; Jiafeng Zhu;

  • 作者单位

    School of Life Science and Engineering, Southwest University of Science and Technology,Mianyang 621000, China,China Academy of Engineering Physics, Mianyang 621000, China;

    School of Life Science and Engineering, Southwest University of Science and Technology,Mianyang 621000, China;

    School of Life Science and Engineering, Southwest University of Science and Technology,Mianyang 621000, China;

    School of Life Science and Engineering, Southwest University of Science and Technology,Mianyang 621000, China;

  • 会议组织
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 工程材料一般性问题;
  • 关键词

    konjac glucomannan; conformation; morphology; afm; tem; sem;

    机译：魔芋葡甘露聚糖;构象形态学; afm; tem;学期;

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