title: Coacervation of cationic gemini surfactant with weakly charged anionic polyacrylamide.
abstract: Coacervation of cationic gemini surfactant hexamethylene-1,6-bis(dodecyldimethylammonium bromide) (C(12)C(6)C(12)Br(2)) with 10% hydrolyzed polyacrylamide (PAM) has been observed and investigated by turbidity titration, isothermal titration calorimetry, dynamic light scattering and microscopy. Without any assistant additive, the coacervation takes place at very low surfactant concentration, and exists in a broad surfactant concentration range. The morphology of the coacervate sponge phase varies in pore size as a function of C(12)C(6)C(12)Br(2) concentration. The polymer/surfactant aggregates grow from soluble complexes with sizes smaller than 20 nm to micrometer during coacervation, and break up into soluble complexes of about 40 nm after coacervate redissolution.
authors: Key Laboratory of Colloid and Interface Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing, People's Republic of China.
authors: Manli
authors: M
authors: Deng
authors: Meiwen
authors: M
authors: Cao
authors: Yilin
authors: Y
authors: Wang
mesh_terms: D000180:Acrylic Resins / Q000737:chemistry*; D000475:Alkenes; D002151:Calorimetry; D011232:Chemical Precipitation; D007477:Ions / Q000737:chemistry; D009391:Nephelometry and Turbidimetry; D010316:Particle Size; D016062:Porosity; D000644:Quaternary Ammonium Compounds / Q000737:chemistry*; D055672:Static Electricity; D013501:Surface-Active Agents / Q000737:chemistry*; D017186:Titrimetry; D000099166:Polyacrylamides
chemical_list: D000180:Acrylic Resins; D000475:Alkenes; D007477:Ions; D000644:Quaternary Ammonium Compounds; D013501:Surface-Active Agents; D000099166:Polyacrylamides; C509664:hexamethylene-1,6-bis(dodecyldimethylammonium bromide)