Can polyacrylamide be a drag reducer?

A very simple cationic monomer and a cationic hydrophobically associating polyacrylamide were synthesized, and the polymer was to function as a drag reducer. The structures of monomer and polymer were characterized by IR and NMR, and the drag-reducing rate, below and above the critical association concentration, (CAC) was tested.

Can cationic polymers be used as drag reducers?

In our current work, a water-soluble cationic monomer with very simple structure was first synthesized under room temperature and pressure, then, a very simple cationic hydrophobically associating polymer was synthesized, and its application prospect as a drag reducer was tested in the laboratory.

What is the optimum drag reducer concentration for modified polyacrylamide?

The modified polyacrylamide is a typical hydrophobically associating polymer, reaching a CAC at a mass concentration of about 0.25% (by weight). It is found from the friction test that the optimum concentration of the drag reducer is about 0.05% in fresh water, and the highest drag-reducing rate reaches as high as 72%.

Does polyacrylamide drag reducing agent affect friction factor and heat transfer coefficient?

Varnaseri M, Peyghambarzadeh SM (2020) The effect of polyacrylamide drag-reducing agent on friction factor and heat transfer coefficient in laminar, transition and turbulent flow regimes in circular pipes with different diameters. Int J Heat Mass Transfer 154:119815

Does cationic hydrophobically associating polyacrylamide have good salt resistance?

Although it is generally believed that cationic hydrophobically associating polyacrylamide has good salt resistance [ 37, 38, 39 ], in this paper, due to the extremely low polymer concentration, the viscosity of the solution is still greatly reduced.

Can cationic polyacrylamide flocculants be used to treat oily water?

Shu, G., Bu, K., Zhao, B. & Zheng, S. Evaluation of newly developed reverse demulsifiers and cationic polyacrylamide flocculants for efficient treatment of oily produced water. Colloids Surf. A 610, 125646 (2021). This work was supported by grants from the “Qihang Program” of the Southwest Petroleum University (2023QHZ001) awarded to C.Z.