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Wanfen Pu,Feng Jiang,Bing Wei,Yanli Tang,Yanyan He 한국고분자학회 2017 Macromolecular Research Vol.25 No.2
The gel-like comb micro block hydrophobic associating polymer (CBHAP) was synthesized by mixed micellar polymerization. The chemical structure of the copolymer was characterized by Fourier transform infrared spectroscopy (FT-IR). The rheological properties of CBHAP in fresh water and saline water at semi-dilute region were investigated. The experimental results show that, because of the intermolecular forces, shear thickening phenomenon can be observed obviously in brine solution and the Newtonian viscosity plateau could be observed clearly before 40 s-1. When the concentration reaches 3,000 mg/L, the G’ and G’’ becomes stable, indicating that CBHAP experiences the sol-gel transition after 3,000 mg/L. However, the curl structure is formed by adding salt, resulting in a higher concentration of the sol-gel transition than that in fresh water. Once the curl structure is destroyed by shearing or stretching, the intermolecular forces will take into effect and complete the sol-gel transition at semi-dilute region.
Wanfen Pu,Chao Shen,Bing Wei,Yang Yang,Yibo Li 한국공업화학회 2018 Journal of Industrial and Engineering Chemistry Vol.61 No.-
To assist in understanding the progress of polysaccharide biopolymers in EOR, this review collects and summarizes the available data for the first time and thoroughly discusses the structure–property–EOR performance relationship from flask to field scale application. Attentions were given to xanthan, scleroglucan, hydroxyethylcellulose (HEC), carboxymethycellulose (CMC), welan gum, guar gum, schizophyllan, and other newly developed family members. This review provides a synopsis of EOR polysaccharides, which are rapidly emerging as eco-friendly and tough injectants compared to synthetic polymers.