Journal
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
Volume 583, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.colsurfa.2019.123979
Keywords
Nano-lignin; Water-based drilling fluids; EC50 fluid loss; Environmentally friendly; Copolymer
Categories
Funding
- National Natural Science Foundation of China [U1762212]
- Qingdao City: Program for Entrepreneurial and Innovative Leading Talents
- Petro China Innovation Foundation [2018D-5007-0306]
Ask authors/readers for more resources
In the study, nano-lignin (Nano-LS) was gradually formed from inside to outside via layer-by-layer self-assembly owing to the interaction of pi-pi bonds, and a novel amphoteric polymer, Nano LS g DAD, was synthesized by grafting N, N-di-methylacrylamide (DMAM), 2-acrylamido-2-methylpropanesulfonic acid (AMPS), diallyl dimethyl ammonium chloride (DMDAAC) onto the Nano-LS in an aqueous solution using ammonium persulfate and sodium bisulfite as initiators. The structure of the resulting graft copolymer was characterized via Fourier transform infrared spectroscopy (FT-IR) and nuclear magnetic resonance ((1) H-NMR) methods. Thermogravimetric analysis (TGA) revealed the thermal stability of Nano-LS-g-DAD, and the thermal decomposition of Nano-LS-g-DAD was observed above 281 degrees C. Nano LS g DAD were prepared also for water-based drilling fluids (WBDFs), and rheological and filtration properties were evaluated before and after aging at 260 degrees C for 16 h. The results revealed that the fluid loss (FLAPI) of WBDFs with Nano-LS-g-DAD was only 8.0 mL after aging at 260 degrees C for 16h in a filtration test conducted as per American Petroleum Institute (API) standards. It indicated that the Nano-LS-g-DAD still maintained positive filtration reduction performance in WBDFs at ultrahigh temperature. The fluid-loss control mechanism of Nano-LS-g-DAD for WBDFs was investigated via Zeta potential analysis and clay particle size distribution measurement. Simultaneously, WBDFs with Nano-LS-g-DAD also maintained positive rheological and filtration properties under the invasion of salt and calcium ions. Furthermore, the acute toxicity value (EC50) of Nano-LS-g-DAD was 54,800 mg/L, which indicated that it was environmentally friendly.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available