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Lei L, Xie D, Song B, Jiang J, Pei X, Cui Z. Photoresponsive Foams Generated by a Rigid Surfactant Derived from Dehydroabietic Acid. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:7908-7916. [PMID: 28735541 DOI: 10.1021/acs.langmuir.7b00934] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Innovation in the structure of surfactants is crucial to the construction of a surfactant-based system with intriguing properties. With dehydroabietic acid as a starting material, a nearly totally rigid azobenzene surfactant (R-azo-Na) was synthesized. The trans-R-azo-Na formed stable foams with half-lives of 636, 656, 976, and 872 min for 0.3, 1, 2, and 4 mmol·L-1 aqueous solutions, respectively. Under UV light irradiation, a fast collapse of the foams was observed, showing an in situ response. The excellent foam stability of trans-R-azo-Na leads to the extremely high photoresponsive efficiency. As revealed by dynamic surface tension and pulsed-field gradient NMR methods, an obvious energy barrier existed in the adsorption/desorption process of trans-R-azo-Na on the air/water interface. The foams formed by trans-R-azo-Na are thus stable against coarsening processes. The results reveal the unique photoresponsive behavior of a surfactant with a rigid hydrophobic skeleton and provide new insights into the structure causing aggregation of surfactants.
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Affiliation(s)
- Lan Lei
- Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical & Materials Engineering, Jiangnan University , Wuxi, Jiangsu 214122, China
| | - Danhua Xie
- Fujian Provincial Key Laboratory of Featured Materials in Biochemical Industry and Fujian Province University Key Laboratory of Green Energy and Environment Catalysis, Ningde Normal University , Ningde, Fujian 352100, China
| | - Binglei Song
- Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical & Materials Engineering, Jiangnan University , Wuxi, Jiangsu 214122, China
| | - Jianzhong Jiang
- Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical & Materials Engineering, Jiangnan University , Wuxi, Jiangsu 214122, China
| | - Xiaomei Pei
- Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical & Materials Engineering, Jiangnan University , Wuxi, Jiangsu 214122, China
| | - Zhenggang Cui
- Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical & Materials Engineering, Jiangnan University , Wuxi, Jiangsu 214122, China
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