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首页> 外文期刊>Journal of Applied Polymer Science >Interaction Between Iodine and Ethyl Cellulose
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Interaction Between Iodine and Ethyl Cellulose

机译：碘和乙基纤维素之间的相互作用

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摘要

Interaction between iodine and ethyl cellulose was investigated by immersing ethyl cellulose membranes in aqueous iodine-iodide solution (iodine doping) and incorporating iodine in the solution from which the membrnae was cast. Oxygen and nitrogen permeabilities in iodine-doped ethyl celulose decrease with an increase in the concentration of iodine in the dopant solution up to 0.003 mol L~(-1) and increase sharply at higher iodine concentrations, and ultraviolet-visible and far-infrared spectra indicate formation of a charge transfer complex. Differential scanning calorimetry of both types of membrane shows changes in the characteristic phase transitions of ethyl cellulose after iodine treatment, including the crystal-liquid crystal transition that has been reported to occur in ethyl cellulose. Further evidence for liquid crystal phases has been found from circular dichroism. X-ray photoelectron spectroscopy of iodine-doped ethyl cellulose films indicates that hte iodine is present in two different chemical states, probably l_3~- and l_2.
机译：通过将乙基纤维素膜浸入碘-碘化物水溶液（碘掺杂）中，然后将碘掺入铸膜的溶液中，研究碘与乙基纤维素之间的相互作用。碘掺杂乙基纤维素中的氧和氮渗透率随掺杂剂溶液中碘浓度的增加而降低，直至高达0.003 mol L〜（-1），在碘浓度较高时，氧和氮的渗透率急剧增加，并具有紫外可见和远红外光谱表明形成电荷转移络合物。两种类型的膜的差示扫描量热法显示了碘处理后乙基纤维素的特征相变的变化，包括已报道的在乙基纤维素中发生的晶液晶转变。从圆二色性发现了液晶相的进一步证据。碘掺杂的乙基纤维素薄膜的X射线光电子能谱表明，碘以两种不同的化学状态存在，可能是1_3〜-和l_2。

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