仪器网

欢迎您: 免费注册 仪器双拼网址:www.yiqi.com
首页-资讯-资料-产品-求购-招标-品牌-展会-行业应用-社区-供应商手机版
官方微信
中国仪器网• 行业应用
仪器网/ 行业应用/ 解决方案/ 石英晶体微天平在壳聚糖/瓜尔胶研究领域的应用

石英晶体微天平在壳聚糖/瓜尔胶研究领域的应用

点击这里给我发消息
内容节点
概述
实验/设备条件
样品提取
实验/操作方法
实验结果/结论
仪器/耗材清单
ABSTRACT: Poly(sodium 4-styrene sulfonate) (PSS) and poly(diallyldimethylammonium chloride) (PDDA) are flexible
polyelectrolytes, whereas sulfated chitosan (SC) and cationic guar gum (CGG) are semiflexible polyelectrolytes. By use of a quartz crystal microbalance with dissipation (QCM-D), a zeta potential analyzer (ZPA), and atomic force microscopy (AFM), we have investigated the growth of PSS/PDDA, PSS/CGG, SC/PDDA, and SC/CGG multilayers as a function of NaCl concentration (CNaCl). For the same layer number, the changes of frequency (−f) and dissipation (D) regarding PSS/PDDA multilayer increase with CNaCl, whereas −f and D for SC/CGG multilayer increase at CNaCl < 0.1 M and decrease at CNaCl >0.1 M as CNaCl increases. In the cases of PSS/CGG and SC/PDDA multilayer, for the same layer number, −f and D increase with CNaCl in the range of CNaCl < 0.5 M, and they decrease with the increasing CNaCl in the case of SC/PDDA multilayer but slightly change for the PSS/CGG multilayer at CNaCl > 0.5 M. QCM-D studies indicate that the growth of multilayers as a function of salt concentration is determined by the delicate balance between the weakening of electrostatic repulsion between identically charged groups and the decrease of electrostatic attraction between neioring layers. ZPA and AFM measurements demonstrate that the extent of surface charge overcompensation and the surface morphology of the multilayers are controlled by the chain conformation.
相关产品
相关解决方案
热门解决方案
最新解决方案
在线留言
官方微信

仪器网微信服务号

扫码获取最新信息


仪器网官方订阅号

扫码获取最新信息

在线客服

咨询客服

在线客服
工作日:  9:00-18:00
联系客服 企业专属客服
电话客服:  400-822-6768
工作日:  9:00-18:00
订阅商机

仪采招微信公众号

采购信息一键获取海量商机轻松掌控