期刊
CARBOHYDRATE POLYMERS
卷 77, 期 2, 页码 223-230出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2008.12.041
关键词
Cycloamylose; Surfactant; Isothermal titration calorimeter
资金
- Youlchon Foundation
- Korean Government (MOEHRD) [KRF-2006-005-J04703]
- National Research Foundation of Korea [2006-005-J04703] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Useful materials can be made from cycloamylose (CA) and the functional properties of CA could be improved by complexation with surfactants. Isothermal titration calorimetry (ITC) was used to investigate interactions between CA and surfactants in buffered solutions. Three surfactants with C-12 non-polar tail groups and charged [anionic: sodium dodecyl sulfate (SDS); cationic: dodecyl trimethylammonium bromide (DTAB)l or non-charged headgroups [non-ionic: polyoxyethylene 23 lauryl ether (Brij35)] were used in this Study. The effects of temperature, pH, and salt concentration were also studied. All three surfactants bound to CA; however, Brij35 binding to CA was negligible. Enthalpy changes associated with binding of surfactants to CA were exothermic except for interactions measured at 50 degrees C. There was no effect of pH on surfactant demicellization or CA binding. Salt concentration affected surfactant demicellization, but the amount of SDS bound to CA at saturation was unaffected by salt. When the titration curves obtained for CA with SDS and DTAB were fitted, it could be analyzed using a model based on a single set of identical sites. (c) 2009 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据