계면활성제를 이용한 합성고분자 수용액의 마찰저항감소 및 퇴화 특성 향상 연구

초록

The turbulent flow resistance of water solution with polymer is dramatically reduced as compared with that of pure water. This effect is named the drag reduction and offers the significant reduction of the pumping power and the energy consumption. But the intense shear forces and the high temperatures experienced by the polymer solution when passing through the pipes cause the degradation-a loss of drag reduction effectiveness. Especially, the degradation behavior is found to be strongly dependent on temperature. This mechanical and thermal degradation can be avoided with certain material such as surfactant which enhance the bonding force between polymer molecules. In the present study, synthetic polymer(Copolymer) and surfactant(SDS) were used and they were mixed in 10 different mixture ratios, whose total concentration was fixed as 100wppm. Degradation of Copolymer-SDS mixture solution was investigated experimentally in closed loop at the temperature of 10℃ and 80℃ with various flow average velocities of 1.5m/sec, 3.0m/sec and 4.5m/sec. Degradation characteristics of polymer solution without surfactant show a radical loss of drag reduction effectiveness at high temperature. But, Degradation alleviation ability of surfactant is especially effective at high temperature. Consequently, this study shows that the addition of surfactant can enhance degradation behavior of high-temperature system to that of low-temperature system.