小角中子散射研究聚环氧乙烷在聚（苯乙烯磺酸钠）水溶液中的微观结构。
A small-angle neutron scattering study of poly(ethylene oxide) microstructure in aqueous poly(styrenesulfonate sodium) solutions.
机构信息
Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Polymer Physics and Chemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing, China.
出版信息
J Colloid Interface Sci. 2011 Jun 1;358(1):226-9. doi: 10.1016/j.jcis.2011.03.015. Epub 2011 Mar 10.
Dilute aqueous solutions of d-PEO and PSSNa mixtures were studied by (2)H NMR spectroscopy and small-angle neutron scattering (SANS). The interactions between d-PEO and PSSNa were found to be negligible both in the presence and absence of NaCl. At very dilute concentration (0.7 mg mL(-1)), d-PEO chains were still found to be slightly collapsed at ambient temperature in water. Upon the addition of PSSNa, aggregates of d-PEO were observed with d-PEO coils loosely associated with each other. The average centre to centre distance between d-PEO coils, which was calculated from the maxima in SANS spectra, was similar to the size of the individual coils. The effect of a simple salt, NaCl, on d-PEO-PSSNa interaction was investigated. Salt addition induced a breakdown of the dilute d-PEO aggregates.
（2）H NMR 光谱和小角中子散射（SANS）研究了 d-PEO 和 PSSNa 混合物的稀水溶液。在存在和不存在 NaCl 的情况下，均发现 d-PEO 和 PSSNa 之间的相互作用可以忽略不计。在非常稀的浓度（0.7 mg mL（-1））下，d-PEO 链在环境温度下仍在水中略微塌陷。加入 PSSNa 后，观察到 d-PEO 聚集物，d-PEO 线圈彼此松散地结合在一起。从 SANS 光谱的最大值计算出的 d-PEO 线圈之间的平均中心到中心距离与单个线圈的大小相似。研究了简单盐 NaCl 对 d-PEO-PSSNa 相互作用的影响。盐的加入导致稀 d-PEO 聚集物的破坏。
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