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| Preparation and Application of Nano-brush Composite by Propylene-modified Cellulose Nanofibril |
| Received:October 09, 2021 |
| DOI：10.11981/j.issn.1000-6842.2022.03.20 |
| Key Words:composite;acryloyl chloride;acrylic cellulose nanofibril;temperature resistance;salt tolerance |
| Fund Project:中国石油化工股份有限公司西北油田分公司-耐170℃超高温有机堵剂研发与应用（合同：34400007-22-ZC0613-0016）。 |
| Author Name | Affiliation | Postcode | | LIU Lian | Completion Test Management Center， Sinopec Northwest Oilfield Company， Urumqi， Xinjiang Uygur Autonomous Region， 830011 | 830011 | | WU Yajun* | Petroleum Engineering Technology Research Institute， Sinopec Northwest Oilfield Company， Urumqi， Xinjiang Uygur Autonomous Region， 830011 | 830011 | | ZHANG Weifeng* | Tianjin Key Laboratory of Pulp and Paper， Tianjin University of Science and Technology， Tianjin， 300457 | 300457 | | LUO Langman | Tianjin Key Laboratory of Pulp and Paper， Tianjin University of Science and Technology， Tianjin， 300457 | 300457 | | GENG Shao | Tianjin Key Laboratory of Pulp and Paper， Tianjin University of Science and Technology， Tianjin， 300457 | 300457 | | WEN Yangbing | Tianjin Key Laboratory of Pulp and Paper， Tianjin University of Science and Technology， Tianjin， 300457 | 300457 |
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| Abstract: |
| Cellulose nanofibril （CNF） was modified by acryloyl chloride （ACL） to obtain acrylic cellulose nanofibril （ACL-CNF） with double bond group on the surface. After that， with ACL-CNF as the main chain， the brush-like complex （PAADAC） was synthesized by free radical copolymerization with methylacryloxyethyl trimethyl ammonium chloride （DMC）， acrylamide （AM）， 2-acrylamide-2-methylpropanesulfonic acid （AMPS） as monomers under the condition of free radical activation. The structure of ACL-CNF was characterized by Fourier transform infrared spectroscopy （FT-IR） and 13C nuclear magnetic resonance （13C NMR）. Moreover， the structure and properties of PAADAC were systematically analyzed by transmission electron microscopy （TEM）， rheometer， and rotary viscometer， and the oil displacement performance of PAADAC was verified by simulated displacement experiment.The results showed that the substitution degree of ACL-CNF increased first and then decreased with the increase of ACL dosage， reaching the maximum of 2.31 at ACL to CNF mass ratio of 3∶1. Compared with PAAD （without ACL-CNF）， PAADAC showed stronger viscoelastic stability， temperature resistance and salt tolerance， and improved the recovery efficiency of crude oil by 8.83 percentage points compared with the water flooding mode. |
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