科研之友
微信
新浪微博
Facebook
分享链接
摘要
P(AM-DMDAAC) (PDA) was synthesized by ultrasound assisted polymerization with dimethyl diallyl ammonium chloride (DMDAAC) and acrylamide (AM) as the monomers. The reaction conditions of polymerization were investigated by single factor approach and L-16 (4(5)) orthogonal array. Results showed that the intrinsic viscosity of PDA could reach 14.6 dL/g with the optimum polymerization conditions as following: monomer concentration of 30%, temperature of 30 degrees C, ultrasound time of 1 h, monomer mass ratio (m((DMDAAC)):m((AM))) of 2:8, initiator concentration of 0.4 parts per thousand, sodium benzoate concentration of 0.5 parts per thousand, ethylene diamine tetraacetic acid (EDTA) concentration of 0.5 parts per thousand, solution pH value of 6 and urea concentration of 0.3 parts per thousand. The self-made PDA was characterized by several instruments. The results of FTIR and (HNMR)-H-1 indicated that PDA was successfully polymerized by AM and DMDAAC. DTA-TGA showed that PDA was very stable at room temperature. And SEM proved the porous and mushroom shaped structure of PDA. For PDA used as flocculant in sludge dewatering experiment, the results showed that the filter cake moisture content and the supernatant turbidity could be reduced to 66.3% and 24.1 NTU, respectively. Comparing with other four cationic polyacrylamides, the filter cake moisture content could be reduced by 2.0-7.4% and the supernatant turbidity could be reduced by 18.3-32.1% via using self-made PDA, that was to say, the dewatering efficiency of self-made PDA was the best. Besides, the optimal dosage of self-made PDA was the least, and the cost analysis showed that it was also favorable, a 14.6-39.3% cost could be saved by using self-made PDA.
- 出版日期2017-12
- 单位重庆大学
