通过与两亲性束状纤维素纳米晶的协同作用，提高水解聚丙烯酰胺的耐温性和耐盐性，提高原油采收率。

IF 8.5 1区化学 Q1 BIOCHEMISTRY & MOLECULAR BIOLOGY

International Journal of Biological Macromolecules Pub Date : 2025-10-09 DOI:10.1016/j.ijbiomac.2025.148131

Hongtian Yan , Yanyan Niu , Yifei Zhu , Xin Fu , Fanjun Meng , Qinglin Ma , Yuju Che

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引用次数: 0

摘要

提高水解聚丙烯酰胺（HPAM）的耐温性和耐盐性是其在提高采收率（EOR）中有效应用的关键。纳米纤维素因其丰富、纳米级、高油水界面吸附效率等特点，在提高采收率方面的应用备受关注。本研究通过磺酸盐和烷基化改性制备了一种新型的表面功能化两亲性束状纤维素纳米晶体（TCNCs-M2），并与HPAM协同使用，形成了一种复合驱体系（0.2 wt% HPAM +0.1 wt% TCNCs-M2）。得益于TCNCs-M2的结构，在盐度为8044 mg的卤水中，当温度为65 ℃时，该杂化体系的黏度提高了48.94 %。L-1)，耐温（25-90 °C），耐盐（盐度8044 mg）。L-1)，粘弹性和老化稳定性与HPAM溶液相比。这些增强是由于杂化体系中的疏水缔合以及强氢键和静电斥力。此外，混合体系的采收率（22.8 %）高于HPAM溶液（16.4 %）。这些结果表明，新配制的两亲性纳米纤维素/HPAM混合体系可以作为一种有效的驱油剂用于条件恶劣的油藏。

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Improving temperature and salt resistance of hydrolyzed polyacrylamide by synergism with amphiphilic tunicate cellulose nanocrystals for enhanced oil recovery

Improving the temperature and salt resistance of hydrolyzed polyacrylamide (HPAM) is crucial for its effective application in enhanced oil recovery (EOR). Due to the abundance, nanoscale, high oil-water interfacial adsorption efficiency of nanocellulose, it has attracted significant attention in EOR applications. In this study, a new kind of surface-functionalized amphiphilic tunicate cellulose nanocrystals (TCNCs-M2) was successfully prepared by sulfonate and alkylated modification, which was synergistically used with HPAM to formulate a hybrid flooding system (0.2 wt% HPAM +0.1 wt% TCNCs-M2). Benefiting from the structure of TCNCs-M2, the hybrid system exhibited stronger performance of thickening ability (viscosity increased by 48.94 % at 65 °C in brine with salinity 8044 mg.L⁻¹), temperature resistance (25–90 °C), salt tolerance (salinity 8044 mg.L⁻¹), viscoelasticity and aging stability compared to that of HPAM solution. These enhancements were attributed to the hydrophobic association in addition to strong hydrogen bonding and electrostatic repulsion in the hybrid system. Furthermore, the hybrid system exhibited a higher oil recovery factor (22.8 %) than HPAM solution (16.4 %). These results indicate that the newly formulated amphiphilic nanocellulose/HPAM hybrid system could be an effective oil-displacing agent for harsh condition reservoirs.

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来源期刊

International Journal of Biological Macromolecules 生物-生化与分子生物学

CiteScore

13.70

自引率

9.80%

发文量

2728

审稿时长

64 days

期刊介绍： The International Journal of Biological Macromolecules is a well-established international journal dedicated to research on the chemical and biological aspects of natural macromolecules. Focusing on proteins, macromolecular carbohydrates, glycoproteins, proteoglycans, lignins, biological poly-acids, and nucleic acids, the journal presents the latest findings in molecular structure, properties, biological activities, interactions, modifications, and functional properties. Papers must offer new and novel insights, encompassing related model systems, structural conformational studies, theoretical developments, and analytical techniques. Each paper is required to primarily focus on at least one named biological macromolecule, reflected in the title, abstract, and text.