Table 1
Summary of activities performed with acrylamide-based polymers and inorganic crosslinkers.
| Year | Activity | Authors |
|---|---|---|
| 1972 | Developed the first gel system – PHPA with a diluted Cr(III) hydroxide solution | Routson and Caldwell |
| 1982 | Studied gel system of PHPA crosslinked with aluminum sulfate and evaluated pH influence | American Petroleum Institute |
| 1974, | Prepared gel systems with PHPA/Al(III) citrate and evaluated the effect of citrate ions | Needham et al. |
| 1985, | Ghazalli and Willhite | |
| and 1988 | Moradi-Araghi et al. | |
| 1987 | Analyzed systems based on PHPA/Cr(III) propionate | Mumallah and Shioyama |
| 1988 | Patented a new polymer gel system based on PHPA/Cr(III) acetate | Sydansk |
| 1992 | Evaluated the resistance of systems formed by PHPA/Al(III) citrate | Fletcher et al. |
| 1993 | Evaluated the delaying effect of Cr(III) complexes with glycolate, malonate and salicylate on PAM–AMPS | Albonico et al. |
| 1994 | Applied Cr(III) systems in the Big Horn Basin in Wyoming | Southwell and Posey |
| 1996 | Studied the effects of Al(III) citrate on the gelation time | Stavland and Jonsbraten |
| 2001 | Developed gel systems with PHPA and Ti(IV) tartrate | Cai and Huang |
| 2001, | Conducted studies with gel systems of PHPA/Cr(III) acetate | Grattoni et al. |
| 2003, | Seright et al. | |
| 2005, | Cheng et al. | |
| 2008, | Vargas-Vasquez and Romero-Zerón | |
| and 2008 | Romero-Zerón et al. | |
| 2010 | Prepared hydrogels with Cr(III) acetate and PAM–AMPS | Koohi et al. |
| 2014 | Evaluated the influence of molecular weight and temperature on PHPA/Cr(III) acetate systems | Dang et al. |
| 2014 | Developed hydrogels formed of PHPA and Al(III) citrate and evaluated the influence of pH | Kedir et al. |
| 2014 | Formed systems with PAM–AMPS, chromium triacetate and added sodium lactate as a retardant (to increase gelation time) | Moghagam et al. |
| 2015a | Studied the influence crosslinking mechanism between PHPA and Cr(III) acetate | Zhang et al. |
| 2015b | Studied the influence of the hydrolysis degree of PHPA on the syneresis in PHPA/Cr(III) hydrogels | Zhang et al. |
| 2016 | Developed a system with delayed crosslinking formed by PAM, thiourea, sodium carbonate and Cr(III) acetate | Sun et al. |
| 2019 | Evaluated the efficiency of sulfonated polyacrylamide and Cr(III) acetate systems | Alsheri et al. |