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Swelling Behavior, Interaction, and Electrostatic Properties of Chitosan/Alginate Dialdehyde Multilayer Films with Different Outermost Layer.
Langmuir ( IF 3.7 ) Pub Date : 2020-04-02 , DOI: 10.1021/acs.langmuir.0c00330 Junhao Huang 1 , Saeed Zajforoushan Moghaddam 1 , Plinio Maroni 2 , Esben Thormann 1
Langmuir ( IF 3.7 ) Pub Date : 2020-04-02 , DOI: 10.1021/acs.langmuir.0c00330 Junhao Huang 1 , Saeed Zajforoushan Moghaddam 1 , Plinio Maroni 2 , Esben Thormann 1
Affiliation
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In this study, self-cross-linked chitosan/alginate dialdehyde multilayer films, capped with either alginate dialdehyde (6 layers) or chitosan (7 layers), were fabricated using the layer-by-layer method. The disruption of the electrostatic equilibrium when exposing the fabricated layers to acidic and alkaline conditions causes swelling within the film and independently in the outermost layer, showing dependence on the ionic strength. Spectroscopic ellipsometry and quartz crystal microbalance with dissipation monitoring were employed to examine the swelling behavior. Atomic force microscopy colloidal probe measurements were conducted to assess the surface forces between the multilayer films at different pH and ionic strengths. Finally, the electrostatic properties of the multilayer films were examined at different pH and ionic strengths using zeta potential measurements. The results suggest that stimuli-responsiveness and overall swelling behavior of the polysaccharide multilayer films significantly depend on the outermost layer, an effect that should expectedly become more pronounced the thinner the film becomes.
中文翻译：
具有不同最外层的壳聚糖/藻酸酯二醛多层薄膜的溶胀行为，相互作用和静电性能。
在这项研究中，使用逐层方法制造了以藻酸盐二醛（6层）或壳聚糖（7层）封端的自交联壳聚糖/藻酸盐二醛多层膜。当将所制造的层暴露于酸性和碱性条件下时，静电平衡的破坏导致膜内和独立于最外层的溶胀，显示出对离子强度的依赖性。椭圆偏振光谱法和石英晶体微量天平（带耗散监测）用于检查溶胀行为。进行原子力显微镜胶体探针测量，以评估在不同pH和离子强度下多层膜之间的表面力。最后，在不同的pH和离子强度下，使用zeta电位测量检查了多层膜的静电性能。结果表明，多糖多层膜的刺激响应性和总体溶胀行为显着取决于最外层，预期该作用随着膜的变薄而变得更加明显。
更新日期：2020-04-03
中文翻译：
具有不同最外层的壳聚糖/藻酸酯二醛多层薄膜的溶胀行为，相互作用和静电性能。
在这项研究中，使用逐层方法制造了以藻酸盐二醛（6层）或壳聚糖（7层）封端的自交联壳聚糖/藻酸盐二醛多层膜。当将所制造的层暴露于酸性和碱性条件下时，静电平衡的破坏导致膜内和独立于最外层的溶胀，显示出对离子强度的依赖性。椭圆偏振光谱法和石英晶体微量天平（带耗散监测）用于检查溶胀行为。进行原子力显微镜胶体探针测量，以评估在不同pH和离子强度下多层膜之间的表面力。最后，在不同的pH和离子强度下，使用zeta电位测量检查了多层膜的静电性能。结果表明，多糖多层膜的刺激响应性和总体溶胀行为显着取决于最外层，预期该作用随着膜的变薄而变得更加明显。
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