期刊
LANGMUIR
卷 28, 期 14, 页码 5940-5946出版社
AMER CHEMICAL SOC
DOI: 10.1021/la300051w
关键词
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资金
- National Natural Science Foundation of China [20976153]
- Chinese State Key Laboratory of Chemical Engineering at Zhejiang University [SKL-ChE-12T05]
- Program for Changjiang Scholars and Innovative Research Team in University in China [IRT0942]
This work reports the development of a reversibly coagulatable and redispersible polystyrene latex system that can be triggered by N-2/CO2. The coagulatability and redispersibility of the latexes were achieved by employing 0.9-5.6 wt % (N-amidino)dodecyl acrylamide (DAm), a reactive switchable surfactant, in an emulsion polymerization of styrene under CO2 atmosphere. The resulted latex particles were readily coagulated by N-2 bubbling at 60 degrees C and redispersed by CO2 bubbling and ultrasonication, which switched amidine moieties between neutral and ionic states. The coagulation/redispersion processes were repeatable. The prepared latexes showed good stabilities against electrolytes, especially with higher charges.
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