含铅聚合物微凝胶与硫化氢反应前后在良溶剂中的分子扩散行为

高等学校化学学报 ›› 1994, Vol. 15 ›› Issue (11): 1719.

含铅聚合物微凝胶与硫化氢反应前后在良溶剂中的分子扩散行为

杨毅, 高明远, 马荣久, 边凤兰, 沈家骢

吉林大学化学系, 长春, 130023

收稿日期:1993-11-18 修回日期:1994-03-20 出版日期:1994-11-24 发布日期:1994-11-24
通讯作者: 沈家骢.
作者简介:杨毅,女,25岁,博士研究生.
基金资助:
国家863项目

Studies on Molecular Diffusion Behavior Before and After Reaction Between Pb²⁺ -Containing Microgel and H₂S in a Good Solvent

YANG Yi, GAO Ming-Yuan, MA Rong-Jiu, BIAN Feng-Lan, SHEN Jia-Cong

Department of Chemistry, Jilin University, Changchun, 130023

Received:1993-11-18 Revised:1994-03-20 Online:1994-11-24 Published:1994-11-24

摘要/Abstract

摘要： 用溶液聚合法制备出轻度交联的含铅微凝胶,用光子相关光谱技术测定其在良溶剂中与H₂S反应前、后的扩散行为,由外推法得到在浓度无限稀时的分子扩散系数,给出微凝胶的流体力学半径。结果表明:相同量的含铅微凝胶在不同的初始浓度下与H₂S反应,生成含PbS纳米微粒的凝胶；但其体积增大不同,这说明H₂S与含铅微凝胶的反应既可以在分子内也可以在分子间进行,分子间的反应使含硫化铅微凝胶扩散系数随浓度的变化曲线的线性范围变小。

Abstract: Anew kind of lightly crosslinking microgel containing lead ions was prepared by solution polymerization.The diffusion behavior, before and after reaction between the Pb²⁺ -containing microgel and H₂Sin a good solvent, was measured by means of Dynamic Light Scatttering separately.The diffusion coefficients of the microgels at infinite dilution concentration were obtained by extrapolation and hydrodynamic radii of the microgels were calculated with Stokes-Einstein equation.The results show that the volumes of PbS-containing microgel varied with the initial concentrations of Pb²⁺ containing microgel in reaction. It shows that H₂Sreacted not only within one microgel particle, but also between the microgel particles, The linear relationship range of D-Ccurve decreased because of the connection betweenPbS-containing microgel particles.

Key words: Photon correlation spectroscopy, Molecular diffusion coefficient, Lead ions-containing microgel (P-Pb), PbS-containing microgel(P-PbS), PbS ultrafine particle

TrendMD:

杨毅, 高明远, 马荣久, 边凤兰, 沈家骢. 含铅聚合物微凝胶与硫化氢反应前后在良溶剂中的分子扩散行为. 高等学校化学学报, 1994, 15(11): 1719.

YANG Yi, GAO Ming-Yuan, MA Rong-Jiu, BIAN Feng-Lan, SHEN Jia-Cong. Studies on Molecular Diffusion Behavior Before and After Reaction Between Pb²⁺ -Containing Microgel and H₂S in a Good Solvent. Chem. J. Chinese Universities, 1994, 15(11): 1719.

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