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A novel responsive stabilizing Janus nanosilica as a nanoplugging agent in water-based drilling fluids for exploiting hostile shale environments

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Petroleum Science 2024年第2期21卷 1190-1210页

作者： Alain Pierre Tchameni Lv-Yan Zhuo lesly da.ilva.wandji djouonkep Robert Dery Nagre Lu-Xin Chen Lin Zhao Chao Ma Bin-Qiang Xie College of Petroleum Engineering Yangtze UniversityWuhan430100HubeiChina Key Laboratory of Drilling and Production Engineering for Oil and Gas HubeiChina Lost Circulation Control Laboratory National Engineering Laboratory for Petroleum Drilling EngineeringYangtze UniversityWuhan430100HubeiChina College of Petroleum Engineering Shandong Institute of Petroleum and Chemical TechnologyDongying257061ShandongChina Petroleum Engineer Research Institute of Petrochina dagang Oilfield Tianjin300280China Department of Chemical Engineering Kumasi Technical UniversityP.O.Box 854KumasiGhana

Thermo-responsive nanocomposites have recently emerged as potential nanoplugging agents for shale stabilization in high-temperature water-based drilling fluids(WBDFs). However, their inhibitory properties have not been very effective in high-temperature drilling operations. Thermo-responsive Janus nanocomposites are expected to strongly interact with clay particles from the inward hemisphere of nanomaterials, which drive the establishment of a tighter hydrophobic membrane over the shale surface at the outward hemisphere under geothermal conditions for shale stabilization. This work combines the synergistic benefits of thermo-responsive and zwitterionic nanomaterials to synchronously enhance the chemical inhibitions and plugging performances in shale under harsh conditions. A novel thermoresponsive Janus nanosilica(TRJS) exhibiting zwitterionic character was synthesized, characterized,and assessed as shale stabilizer for WBDFs at high temperatures. Compared to pristine nanosilica(Si NP)and symmetrical thermo-responsive nanosilica(TRS), TRJS exhibited anti-polyelectrolyte behaviour, in which electrolyte ions screened the electrostatic attraction between the charged particles, potentially stabilizing nanomaterial in hostile shaly environments(i.e., up to saturated brine or API brine). Macroscopically, TRJS exhibited higher chemical inhibition than Si NP and TRS in brine, prompting a better capability to control pressure penetration. TRJS adsorbed onto the clay surface via chemisorption and hydrogen bonding, and the interactions became substantial in brine, according to the results of electrophoretic mobility, surface wettability, and X-ray diffraction. Thus, contributing to the firm trapping of TRJS into the nanopore structure of the shale, triggering the formation of a tight hydrophobic membrane over the shale surface from the outward hemisphere. The addition of TRJS into WBDF had no deleterious effect on fluid properties after hot-treatment at 190℃, implying that TRJ

关键词： Janus nanosilica Thermo-responsive copolymer Anti-polyelectrolyte effect Shale stabilizer Inhibition Plugging Drilling fluid

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Synthesis and Characterization of Novel Hydrolytically Degradable Polyesters

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Journal of Wuhan University of Technology(Materials Science) 2023年第2期38卷 467-473页

作者： SUN Xin CHENG Zhengzai djouonkep lesly da.ilva.wandji LAN Chupeng JIA Ruyan ZENG Sheng CHENG Junpeng TANG Ran LI Yi YUAN Beibei GAUTHLLER Mario Research Institute of Fine Organic Chemicals&Organic Materials at School of Chemistry and Chemical Engineering Wuhan University of Science and TechnologyWuhan430081China Coal Conversion and New Carbon Materials Hubei Key Laboratory Wuhan University of Science and TechnologyWuhan430081China Yidu High-tech Industrial Park Management Committee Yichang443000China Department of Chemistry University of WaterlooWaterlooOntarioN2L 3G1Canada

Six novel hydrolytically degradable polyesters were synthesized from thiodipropionic acid(TDPA)and five diols by melt polycondensation,and characterized by FT-IR,1H NMR,gel permeation chromatography,differential scanning calorimetry and thermogravimetry *** polystyrene-equivalent number-average(Mn)and weight-average molecular weight(Mw)of these polyesters ranged from 4900-11100 da and 7900-20879 da,respectively,with PDI values of *** melting point varied from 62.3-127.9℃,and the 50%mass-loss temperature ranged between 387-417℃.The degradation of these polyesters was studied in terms of relative weight loss in distilled water at different *** losses of 14%-26%were obtained at pH 7.0,26%-38%at pH 6.0,and 32%-43%at pH 8.3 over a 20-week *** ecotoxicity study suggested that safety of the synthesized polyesters for the eisenia *** results indicate that these polyesters have a combination of good thermal and degradability behaviors,which can be tailored through selection of the diol monomers used in the synthesis.

关键词： thiodipropionic acid water-degradable polyester melt polycondensation thermal properties degradability tailoring

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Degradable Polyesters based on Oxygenated Fatty Acid Monomer

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Journal of Wuhan University of Technology(Materials Science) 2022年第4期37卷 753-759页

作者： CHENG Zhengzai LI Yi lesly da.ilva.wandji djouonkep ZENG Sheng WANG Huan WANG Linfeng CAI Shuanpu LIU Panpan HU Hai YANG Yingao LI Jiaqi QIN Jisong Mario Gauthier Research Institute of Fine Organic Chemicals&Organic Materials at School of Chemistry and Chemical Engineering Wuhan University of Science and TechnologyWuhan 430081China Coal Conversion and New Carbon Materials Hubei Key Laboratory Wuhan University of Science and TechnologyWuhan 430081China Department of Petroleum Engineering Applied Chemistry in Oil and Gas FieldsYangtze UniversityWuhan 430100China Department of Chemistry University of Waterloo200 University Avenue WestWaterlooOntario N2L3G1Canada

A series of degradable polyesters was synthesized via melt polymerization of 3,6-dioxaoctane-1,8-dioic acid and five different diols,catalyzed by antimony trioxide(Sb_(2)O_(3)).The polymers were characterized by FT-IR and ^(1)H NMR spectroscopy,gel permeation chromatography(GPC)and differential scanning calorimetry(DSC)*** polydispersity index(PDI=M_(w)/M_(n))of the polyesters ranged from 1.55 to 1.99,the weight-average molecular weight(M_(w))from 1.8×10^(4) to 3.2×10^(4) da,the melting point from 63 to 123℃,and the highest decomposition temperature observed was 363℃.The influence of the structure of the polymer chain on hydrolytic degradability was investigated with tests performed at three different values of *** findings obtained provide useful insight for the molecular design and the synthesis of degradable polyesters.

关键词： degradable polyesters melt polymerization thermal properties aliphatic-aromatic polyester

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非层状过渡金属碳化物在能源存储与转换中的应用进展

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新型炭材料 2021年第4期36卷 751-778页

作者：高银红南旭阳尧孙兵徐文莉 wandji djouonkep lesly dasilva 李轩科李艳军张琴武汉科技大学化学与化工学院湖北武汉430081 武汉科技大学煤转化与新型炭材料湖北省重点实验室湖北武汉430081

非层状过渡金属碳化物(NL-TMCs)具有多样化的形貌结构和可调控的化学计量比,从而表现出高比容量、高导电性和良好的稳定性等优异的电/催化性能。因此,本文对NL-TMCs在储能与转换领域的最新进展进行了总结。首先阐述了NL-TMCs的可控制备... 详细信息

非层状过渡金属碳化物(NL-TMCs)具有多样化的形貌结构和可调控的化学计量比,从而表现出高比容量、高导电性和良好的稳定性等优异的电/催化性能。因此,本文对NL-TMCs在储能与转换领域的最新进展进行了总结。首先阐述了NL-TMCs的可控制备策略,其中包括碳热还原法、化学气相沉积法、模板辅助法、水热/溶剂热法。其次,探讨了NL-TMCs在锂离子电池、锂硫电池、全水解等能源储存与转换领域中应用,并对其未来的发展方向进行了展望,为合理地设计和构建NL-TMCs以供实际应用提供了理论基础。

关键词：非层状过渡金属碳化物电化学能源转换能源存储

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基于含硫单体的可降解聚酯的表征与性能

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精细石油化工 2021年第5期38卷 65-69页

作者：陈俊程正载熊景 wandji djouonkep lesly dasilva Siegu William Mawuko 孙欣贾如艳袁贝贝 Mario Gauthier 武汉科技大学化学与化工学院精细有机化工与有机材料研究所湖北武汉430081 煤转化与新型炭材料湖北省重点实验室湖北武汉430081

以硫代二丙酸和间苯二酚二(2-羟乙基)醚为主要原料,Sb2O3为催化剂,通过熔融缩聚法合成了聚(硫代二丙酸-间苯二酚二(2-羟乙基)醚)酯。采用FT-IR、1H NMR,对聚酯的结构进行了表征;采用GPC、DSC、TGA测试其相对分子质量和热性能;并采用自... 详细信息

以硫代二丙酸和间苯二酚二(2-羟乙基)醚为主要原料,Sb2O3为催化剂,通过熔融缩聚法合成了聚(硫代二丙酸-间苯二酚二(2-羟乙基)醚)酯。采用FT-IR、1H NMR,对聚酯的结构进行了表征;采用GPC、DSC、TGA测试其相对分子质量和热性能;并采用自然掩埋法,对其在土壤中的降解性能进行了考察。结果表明:该新型含硫聚酯数均相对分子质量和重均相对分子质量分别为12634 g/mol和19708 g/mol、热分解5%温度为351.7℃,热分解50%温度为401.5℃,熔点为99.12℃,ΔHm为90.12 J/g,且在自然土壤环境下经过24个月的降解,聚酯P的失重率达到9.3%,具有较好的降解性能。

关键词：硫代二丙酸聚(硫代二丙酸-间苯二酚二(2-羟乙基)醚)酯熔融缩聚可降解聚酯

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可降解含氮聚酯的合成与性能

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化工新型材料 2022年第4期50卷 283-286页

作者：熊景程正载陈俊 wandji djouonkep lesly dasilva Seigu William Mawuko 孙欣贾如艳袁贝贝 Mario Gauthier 武汉科技大学化学与化工学院精细有机化工与有机材料研究所武汉430081 煤转化与新型炭材料湖北省重点实验室武汉430081

以N-(羧甲基)甘氨酸和对苯二酚二(2-羟乙基)醚为主要原料,三氧化二锑为催化剂,采用熔融聚合法,合成聚[N-(羧甲基)甘氨酸-对苯二酚二(2-羟乙基)醚]酯(P1)。采用FT-IR、1H-NMR对聚酯P1结构进行了表征;采用GPC、DSC、TGA测试其分子量和热性... 详细信息

以N-(羧甲基)甘氨酸和对苯二酚二(2-羟乙基)醚为主要原料,三氧化二锑为催化剂,采用熔融聚合法,合成聚[N-(羧甲基)甘氨酸-对苯二酚二(2-羟乙基)醚]酯(P1)。采用FT-IR、1H-NMR对聚酯P1结构进行了表征;采用GPC、DSC、TGA测试其分子量和热性能;并采用自然掩埋法,对其在土壤中的降解性能进行了研究。GPC测试结果表明,该聚酯具有较高的分子量,Mn为41500g/mol。TG结果显示,该聚酯有良好的热稳定性,起始热分解温度高于333℃。在自然土壤环境下,聚酯P1经过两年的降解,分子量下降20%,降解性能好,具有良好发展前景。

关键词：含氮聚酯N-(羧甲基)甘氨酸可降解熔融聚合

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