应用化学 ›› 2023, Vol. 40 ›› Issue (10): 1437-1447.DOI: 10.19894/j.issn.1000-0518.230072

• 研究论文 • 上一篇    下一篇

有机锆交联魔芋葡甘聚糖凝胶的制备及性能

姜启运, 陈俊杰, 陈豪, 吴志强, 沈春晖, 高山俊()   

  1. 武汉理工大学材料科学与工程学院,武汉 430000
  • 收稿日期:2023-03-24 接受日期:2023-08-11 出版日期:2023-10-01 发布日期:2023-10-13
  • 通讯作者: 高山俊

Preparation and Properties of Organic Zirconium Crosslinked Konjac Glucomannan Gel

Qi-Yun JIANG, Jun-Jie CHEN, Hao CHEN, Zhi-Qiang WU, Chun-Hui SHEN, Shan-Jun GAO()   

  1. School of Materials Science and Engineering,Wuhan University of Technology,Wuhan 430000,China
  • Received:2023-03-24 Accepted:2023-08-11 Published:2023-10-01 Online:2023-10-13
  • Contact: Shan-Jun GAO
  • About author:sjgao@whut.edu.cn

摘要:

以正丁醇锆为中心离子试剂,分别以3-氨基-1,2-丙二醇(APG)和N-甲基二乙醇胺(MDEA)为有机配体制备两种正丁醇锆交联剂,用魔芋葡甘聚糖(KGM)溶液与正丁醇锆交联剂制备了一系列水基压裂液。通过傅里叶变换红外光谱仪(FT-IR)、核磁共振波谱(NMR)、高分辨质谱(HRMS)、流变仪、扫描电子显微镜(SEM)和差示扫描量热仪(DSC)系统地表征了压裂液的结构、形貌以及性能。讨论了锆酸盐与植物胶发生交联的反应途径,并运用Winter-Chambon公式准确确定溶胶-凝胶转变点。研究了反应物浓度、配体种类对储能模量(G′)、损耗模量(G″)和溶胶-凝胶转变时间(tcr)的影响。结果表明,相较于APG配体,以MDEA为配体的有机锆/KGM凝胶体系的延迟交联性能、耐温耐剪切性能更好,其tcr随KGM质量浓度的增大呈先减小后增大的趋势,并且随配体浓度和交联剂质量分数的增加呈减小趋势,KGM质量浓度控制在4.0 g/L时,凝胶体系的常温延时交联时间在7~45 min内可调节,溶胶-凝胶转变温度(Tsol-gel)为71.4 ℃,其耐温性能高达120 ℃,在170 s-1剪切速率条件下能保持171 mPa·s的粘度。该有机锆交联KGM凝胶体系为石油开采领域的研究和应用提供有益借鉴。

关键词: 魔芋葡甘聚糖, 正丁醇锆, 配位, 延迟凝胶化, 动态流变性能

Abstract:

Two n-butanol zirconium crosslinkers were prepared using n-butanol zirconium as the central ionic reagent and 3-amino-1,2-propanediol (APG) and N-methyldiethanolamine (MDEA) as the organic ligands, respectively. A series of water-based fracturing fluids were prepared with konjac glucomannan (KGM) solution and n-butanol zirconium crosslinker The morphology, structure and properties of fracturing fluid are systematically characterized by Fourier transform infrared spectrometry (FT-IR), nuclear magnetic resonance spectroscopy (NMR), high resolution mass spectrometer (HRMS), rheometer, scanning electron microscopy (SEM)?, and differential scanning calorimeter (DSC). The reaction pathway of zirconate and KGM crosslinking is discussed. The sol-gel transition point is accurately determined by Winter-Chambon formula. The effects of reactant concentration and ligand species on storage modulus (G'), loss modulus (G″), and sol-gel transition time (tcr) are studied. It is found that compared with APG ligand, the organozirconium/KGM gel system with MDEA as ligand have better delayed cross-linking performance, better temperature and shear resistance. Its tcr shows a trend of first decreasing and then increasing with the increase of KGM concentration, and a decreasing trend with the increase of ligand concentration and crosslinking agent concentration. When the concentration of KGM solution is controlled at 4.0 g/L, the delay time of gel system can be adjusted within 7~45 min at room temperature, the sol-gel transition temperature (Tsol-gel) is 71.4 ℃, and its temperature resistance can reach 120 ℃. The viscosity of 171 mPa·s is maintained at a shear rate of 170 s-1. The organic zirconium crosslinked KGM gel system provides a useful reference for the research and application in the field of petroleum exploitation.

Key words: Konjac glucomannan, Zirconium n-butoxide, Coordination, Delayed gelation, Dynamic rheological properties

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