Influence of Solubility on the Adsorption of Different Xyloglucan Fractions at Cellulose-Water Interfaces.,Biomacromolecules

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Influence of Solubility on the Adsorption of Different Xyloglucan Fractions at Cellulose-Water Interfaces.
Biomacromolecules ( IF 5.5 ) Pub Date : 2019-12-26 , DOI: 10.1021/acs.biomac.9b01465
Saina Kishani _{1,

2} , Francisco Vilaplana _{2,

3} , Marcus Ruda ₄ , Per Hansson ₅ , Lars Wågberg _{1,

2}

Affiliation

Xylogucan (XG) fractions with different molar masses were prepared while preserving the natural structure of the XG. The solubility of the fractions was investigated using light scattering, chromatography, and microscopy techniques. The conformational changes of the XG molecules and their association and phase separation were investigated together with concentration and molar mass changes. The knowledge gained was then applied to investigate the interaction of different XG fractions at cellulose model surfaces using a quartz crystal microbalance with dissipation. The results indicate that there is a cluster formation and phase separation of the XG molecules at the cellulose/water interface induced by the increase in XG concentration close to the surface. Concomitantly, the adsorption regimes are altered for the XG fractions depending on the solubility properties, indicating that the insolubility, association, and phase separation of XGs in aqueous media affect their interaction with cellulose. The study is of vital importance for improving the functionality of sustainable materials made from xyloglucan/cellulose natural composites.

中文翻译：

溶解度对不同的木葡聚糖级分在纤维素-水界面吸附的影响。

制备具有不同摩尔质量的木葡聚糖（XG）馏分，同时保留XG的天然结构。使用光散射，色谱法和显微镜技术研究级分的溶解度。研究了XG分子的构象变化及其缔合和相分离以及浓度和摩尔质量的变化。然后，将获得的知识用于使用具有耗散特性的石英晶体微量天平研究纤维素模型表面上不同XG组分的相互作用。结果表明，由于靠近表面的XG浓度的增加，在纤维素/水界面处XG分子存在簇形成和相分离。同时，XG馏分的吸附方式会根据溶解度特性而改变，这表明XG在水性介质中的不溶性，缔合和相分离会影响XG与纤维素的相互作用。这项研究对于改善由木葡聚糖/纤维素天然复合材料制成的可持续材料的功能至关重要。

更新日期：2019-12-27

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