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Poly(aspartic acid)–tryptophan grafted copolymer and its scale‐inhibition performance
Author(s) -
Sun Xiaoyu,
Zhang Junping,
Yin Chengxian,
Zhang Juantao,
Han Jiao
Publication year - 2015
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.42739
Subject(s) - aspartic acid , copolymer , tryptophan , precipitation , scanning electron microscope , materials science , chemical engineering , chemistry , nuclear chemistry , organic chemistry , biochemistry , polymer , amino acid , composite material , physics , meteorology , engineering
Scale deposition, which severely damages oil exploration, is a difficulty encountered in oil fields. Scale inhibitors are widely used for controlling scales. Poly(aspartic acid) (PASP) is attracting more and more attention with increasing environmental concern and discharge limitations. However, PASP's poor inhibition in a high‐temperature environment markedly limits its wide use. Thus, poly(aspartic acid)–tryptophan grafted copolymer (PASPTR) was synthesized to improve the inhibition efficiency of PASP. The results show that the reactant of PASPTR has a great effect on its inhibition performance. PASPTR was found to inhibit the precipitation of CaSO 4 close to 90% at concentrations as low as 0.4 mg/L at 50°C. The inhibition efficiency of PASPTR against CaCO 3 was close to 100% with the concentration of 2 mg/L at 50°C. Scanning electron microscopy and X‐ray diffraction analyses, which showed the morphological and crystal structural changes of CaCO 3 and CaSO 4 precipitation, verified the excellent inhibition performance of PASPTR. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132 , 42739.