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- Title
Optimizing of ultraviolet initiated template polymerization of cationic polyacrylamide by response surface methodology.
- Authors
Zhengan Zhang; Juanfang Shang; Yuying Li; Lin Li; Yujiao Ye; Xia Hua; Bailian Li
- Abstract
Cationic polyacrylamide (CPAM) is a commonly used flocculant for water treatment. The main factors affecting its flocculation performance are cationic degree and intrinsic viscosity. This study was to improve the intrinsic viscosity and cationic degree of CPAM, sodium polyacrylate was selected as the template (T), and dimethyldiallylammonium chloride (DMD) and acrylamide (AM) were used as monomers to prepare a Novel cationic polyacrylamide (TPDA) with ultraviolet (UV)-initiated template polymerization. First, single-factor tests were conducted to screen the factors that had significant effects on TPDA intrinsic viscosity, and then response surface methodology (RSM) tests were conducted using the selected factors to obtain the optimal polymerization conditions. The results showed that the addition of template increased the cationic degree of TPDA, and decreased its intrinsic viscosity. there were three factors that significantly affected TPDA intrinsic viscosity, and the order of significance was the initiator concentration, monomer mass fraction and pH. A model that could guide the TPDA polymerization was obtained by RSM tests. The results of model optimization showed that the optimal conditions for TPDA polymerization were as follows: the monomer mass fraction, pH value, concentration of photoinitiator (V-50), mass fraction of urea and n(T):n(DMD):n(AM) in the polymerization solution were 27.1%, 7.2, 0.47‰, 0.3%, 3:3:7, respectively, and the ultraviolet irradiation time of 70 min, and the intrinsic viscosity of the obtained TPDA was.10.98 dL/g.
- Subjects
RESPONSE surfaces (Statistics); POLYACRYLAMIDE; ADDITION polymerization; INTRINSIC viscosity; WATER purification
- Publication
Desalination & Water Treatment, 2023, Vol 293, p114
- ISSN
1944-3994
- Publication type
Article
- DOI
10.5004/dwt.2023.29475