PMID- 31460270
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20231013
IS  - 2470-1343 (Electronic)
IS  - 2470-1343 (Linking)
VI  - 4
IP  - 7
DP  - 2019 Jul 31
TI  - Stabilization of Polymer Nanocomposites in High-Temperature and High-Salinity 
      Brines.
PG  - 11631-11641
LID - 10.1021/acsomega.9b00963 [doi]
AB  - Stabilization of polymer nanocomposites in aqueous environment with high salinity 
      has been a constant challenge for their applications. This work aimed to improve 
      the stability of graphene oxide (GO) polyacrylamide nanocomposites at 
      high-temperature and high-ionic-strength brines. GO was synthesized via a 
      modified Hummers' method and the copolymer of acrylamide (COPAM) was obtained via 
      free-radical polymerization. The covalent functionalization of COPAM with the 
      partially reduced GO (rGO) was successfully achieved. 1,3-Propane sultone was 
      used to further functionalize the obtained rGO-COPAM composites to accomplish the 
      zwitterionic character on the rGO-COPAM surface to get a material with excellent 
      temperature stability and dispersibility in the presence of high ionic strength 
      brines. The synthesized materials were characterized by (1)H NMR, gel permeation 
      chromatography, X-ray photoelectron spectroscopy, scanning electron microscopy, 
      transmission electron microscopy analysis, and so forth. The thermal stability of 
      the dispersion at 80  degrees C for 120 days was observed by visual inspection and 
      spectroscopic analysis. The results showed that the zwitterionic polymer produced 
      excellent brine stability with GO nanosheets and suggested promising applications 
      of zwitterionic polyacrylamide-GO systems especially for enhanced oil recovery.
FAU - Haruna, Maje Alhaji
AU  - Haruna MA
AD  - School of Chemical and Process Engineering, University of Leeds, Leeds LS2 9JT, 
      U.K.
FAU - Wen, Dongsheng
AU  - Wen D
AD  - School of Chemical and Process Engineering, University of Leeds, Leeds LS2 9JT, 
      U.K.
AD  - School of Aeronautic Science and Engineering, Beihang University, Beijing 100083, 
      P. R. China.
LA  - eng
PT  - Journal Article
DEP - 20190705
PL  - United States
TA  - ACS Omega
JT  - ACS omega
JID - 101691658
PMC - PMC6682011
COIS- The authors declare no competing financial interest.
EDAT- 2019/08/29 06:00
MHDA- 2019/08/29 06:01
PMCR- 2019/07/05
CRDT- 2019/08/29 06:00
PHST- 2019/04/04 00:00 [received]
PHST- 2019/05/24 00:00 [accepted]
PHST- 2019/08/29 06:00 [entrez]
PHST- 2019/08/29 06:00 [pubmed]
PHST- 2019/08/29 06:01 [medline]
PHST- 2019/07/05 00:00 [pmc-release]
AID - 10.1021/acsomega.9b00963 [doi]
PST - epublish
SO  - ACS Omega. 2019 Jul 5;4(7):11631-11641. doi: 10.1021/acsomega.9b00963. 
      eCollection 2019 Jul 31.