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Development of Superhydrophobic Nano-SiO_(2)and Its Field Application in Low-permeability,High-temperature,and High-salinity Oil Reservoirs
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作者 Qin Bing Gao Min +4 位作者 Lei Xue Zhao Lin Zhu Qizhi Meng Fanbin Jiang Jianlin 《China Petroleum Processing & Petrochemical Technology》 SCIE CAS CSCD 2024年第3期1-14,共14页
In this study,to meet the stringent requirements on the hydrophobicity of nano-SiO_(2)particles for use in depressurization and enhanced injection operations in high-temperature and high-salinity oil reservoirs,second... In this study,to meet the stringent requirements on the hydrophobicity of nano-SiO_(2)particles for use in depressurization and enhanced injection operations in high-temperature and high-salinity oil reservoirs,secondary chemical grafting modification of nano-SiO_(2)is performed using a silane coupling agent to prepare superhydrophobic nano-SiO_(2) particles.Using these superhydrophobic nano-SiO_(2)particles as the core agent,and liquid paraffin or diesel as the dispersion medium,a uniform dispersion of nano-SiO_(2)particles is achieved under high-speed stirring,and a chemically enhanced water injection system with colloidal stability that can be maintained for more than 60 d is successfully developed.Using this system,a field test of depressurization and enhanced injection is carried out on six wells in an oilfield,and the daily oil production level is increased by 11 t.The cumulative increased water injection is 58784 m^(3),the effective rate of the measures was 100%,and the average validity period is 661 d. 展开更多
关键词 nano-sio_(2)particle hydrophobic modification enhanced injection operation low-grade reservoir low permeability oilfield
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CO_(2)驱硅酸凝胶封窜体系的制备与性能
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作者 刘笑春 鄢长灏 +2 位作者 何治武 付继有 王晨 《化学研究与应用》 CAS 北大核心 2024年第8期1922-1928,共7页
开发易注入、可形成有效封堵的裂缝封窜技术,对于二氧化碳驱提高采收率技术具有重要意义。本文对硅酸乙酯进行改性提高其耐温性和不溶性,再乳化形成易注入的O/W乳液。考察了乳化剂类型和乳化剂用量对胶凝过程的影响。明确了pH值、温度... 开发易注入、可形成有效封堵的裂缝封窜技术,对于二氧化碳驱提高采收率技术具有重要意义。本文对硅酸乙酯进行改性提高其耐温性和不溶性,再乳化形成易注入的O/W乳液。考察了乳化剂类型和乳化剂用量对胶凝过程的影响。明确了pH值、温度和矿化度等因素对凝胶性能的影响,并通过人造岩心评价了该硅酸凝胶体系的封堵性能。结果表明,20%Span-80+80%Tween-80组成的复合乳化剂乳化效果最好,当乳化用量为1%时,乳化稳定性最好,粒径均一,易注入。当环境pH小于7时,可诱导乳液形成凝胶;随着温度的升高,成胶强度增强,但在150℃高温下,成胶强度下降。升高矿化度可加速凝胶的生成,但对凝胶强度影响较小。动力学分析表明,H+浓度是影响凝胶产生的关键因素,因此可在CO_(2)驱替酸性环境中,实现地层封堵。岩心实验结果显示,该凝胶颗粒可显著降低地层渗透率,封堵效果大于80%,可满足二氧化碳驱防气窜要求。 展开更多
关键词 CO_(2)驱 防气窜 乳化 硅酸
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Nano-SiO_(2)和镍渣掺量对碱矿渣砂浆强度和自收缩的影响
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作者 葛翠方 吴露洁 陈琦 《武夷学院学报》 2023年第3期75-80,共6页
为改善碱矿渣砂浆自收缩大的缺陷,将Nano-SiO_(2)和镍渣掺入其中,研究两者掺量对抗折强度、抗压强度和自收缩的影响。研究结果表明:在镍渣掺量一定时,随着Nano-SiO_(2)掺量的增加强度值先提高后降低,掺量为1%时强度值最高,对强度的提高... 为改善碱矿渣砂浆自收缩大的缺陷,将Nano-SiO_(2)和镍渣掺入其中,研究两者掺量对抗折强度、抗压强度和自收缩的影响。研究结果表明:在镍渣掺量一定时,随着Nano-SiO_(2)掺量的增加强度值先提高后降低,掺量为1%时强度值最高,对强度的提高幅度也最大;当Nano-SiO_(2)掺量一定时,随着镍渣掺量的增加强度值逐渐降低,掺量为30%时强度降低幅度最小;当镍渣掺量为30%,随着Nano-SiO_(2)掺量的增加,自收缩值先降低后提高,掺量为1%时,自收缩值最小,对自收缩的降低幅度也最大;当Nano-SiO_(2)掺量为1%时,随着镍渣掺量的增加自收缩值逐渐降低,掺量为30%时降低幅度最大。 展开更多
关键词 碱矿渣水泥砂浆 nano-sio_(2) 镍渣 抗折强度 抗压强度 自收缩
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纳米SiO_(2)在乳化沥青中的不同形态及对乳液存储稳定性的影响
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作者 冀超 曹元浩 李志刚 《中外公路》 2024年第1期76-81,共6页
乳化沥青存储性能不足一直是影响其应用的较大问题,中国已有将纳米SiO_(2)粒子作为添加剂来改善乳化沥青稳定性的研究,但其效果不明显。该文基于Pickering乳液原理将表面改性后的纳米SiO_(2)作为乳化剂直接乳化基质沥青,探究是否比纳米S... 乳化沥青存储性能不足一直是影响其应用的较大问题,中国已有将纳米SiO_(2)粒子作为添加剂来改善乳化沥青稳定性的研究,但其效果不明显。该文基于Pickering乳液原理将表面改性后的纳米SiO_(2)作为乳化剂直接乳化基质沥青,探究是否比纳米SiO_(2)作为改性添加剂对乳化沥青的稳定性改善效果更佳。首先分别制备了普通改性乳化沥青A、纳米SiO_(2)做改性添加剂的乳化沥青B和基于新型纳米SiO_(2)Pickering乳液乳化的乳化沥青C共3种乳化沥青,然后通过光学显微镜与SEM,探究纳米SiO_(2)粒子分别作为乳化剂和改性剂时乳化沥青表面结构的微观形貌差异,分析3种乳化沥青中乳液颗粒的不同形态;最后通过室内乳化沥青试验和乳液颗粒粒径分析,进一步论证纳米SiO_(2)分别作为乳化剂与改性剂对于乳化沥青存储稳定性的差异及差异机理。微观与宏观试验均表明纳米SiO_(2)作为乳化剂比作改性剂能使乳化沥青具备更好的稳定性。该文的研究说明纳米SiO_(2)用作乳化剂能更好地解决乳化沥青稳定性不足的问题,具有很好的应用前景。 展开更多
关键词 道路工程 乳化沥青 纳米SiO_(2)改性 纳米SiO_(2)乳化 Pickering乳液 改性效果 储存稳定性
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Synthesis of a High-Efficiency Demulsifier and Study on Optimal Demulsification Conditions
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作者 Zhu Shuai Zhang YingYu Gui Xia 《China Petroleum Processing & Petrochemical Technology》 SCIE CAS CSCD 2024年第1期107-115,共9页
Oil and water separation has always been a top priority in the oil industry.In this study,a series of hyperbranched fluorinated polyamine-amine polymers(HFPA1-5)were synthesized directly using an improved“one-pot met... Oil and water separation has always been a top priority in the oil industry.In this study,a series of hyperbranched fluorinated polyamine-amine polymers(HFPA1-5)were synthesized directly using an improved“one-pot method.”The highly active fluorinated p-trifluoromethylaniline was used as the core raw material,while diethylenetriamine and methyl acrylate were used as the chain segment.A hyperbranched fluorine-containing polyamine-amine demulsifier(NHFPA6)was obtained through nano-grafting copolymerization of HFPA5.To enhance the demulsification and dehydration performance,the copolymerized HFPA6 was modified and combined.Then,the effects of the combination ratio,demulsifier concentration,demulsification time,and demulsification temperature on the demulsification effect were investigated.The results revealed that a combination ratio of DE-401:NHFPA6=1:1,a demulsification temperature of 50℃,a demulsification time of 60 min,and a demulsifier concentration of 150 mg/L yielded a dehydration rate as high as 99.80%.A response surface optimization design of demulsification conditions was performed.The model verified that the optimal demulsification conditions were 50℃,300 mg/L,and 90 min.However,considering the economic benefits of factories,it is more favorable to select demulsification conditions with a shorter time and lower concentration when the dehydration standard is met.Therefore,the demulsification conditions were selected as 50℃,150 mg/L,and 60 min.Compared to existing demulsifiers,the demulsifier developed in this study exhibits a lower demulsification temperature and higher demulsification efficiency. 展开更多
关键词 HYPERBRANCHED fluorinated polyamine-amine nano-sio_(2)
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纳米SiO_(2)/乳化蜡改性CuAz处理材的尺寸稳定性分析
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作者 赵泽瑜 于丽丽 何承鹏 《天津造纸》 2024年第2期38-43,共6页
为保证防腐处理材在户外长期使用过程中具有较好的尺寸稳定性,采用具有疏水性能的纳米SiO_(2)/乳化蜡溶液对铜唑(CuAz)防腐剂浸注处理的南方松试材进行二次浸注处理,以期探索出改善CuAz处理材尺寸稳定性的最佳工艺条件。结果表明:纳米Si... 为保证防腐处理材在户外长期使用过程中具有较好的尺寸稳定性,采用具有疏水性能的纳米SiO_(2)/乳化蜡溶液对铜唑(CuAz)防腐剂浸注处理的南方松试材进行二次浸注处理,以期探索出改善CuAz处理材尺寸稳定性的最佳工艺条件。结果表明:纳米SiO_(2)及乳化蜡的引入会使CuAz处理材的吸水率和湿胀率降低,其吸水率随着所添加的纳米SiO_(2)的比表面积减小而降低;随着浸泡时间的延长,纳米SiO_(2)的比表面积越小越有利于长久的保持处理材的尺寸稳定性。与未改性木材相比,经不同改性处理的CuAz处理材,其干缩率均会有不同程度的增加,尤其是乳化蜡的添加会使纳米SiO_(2)/CuAz处理材的干缩率有一定程度的增加;并且,随着纳米SiO_(2)比表面积的增加,CuAz处理材的干缩率呈现先增加后减少的趋势。 展开更多
关键词 CuAz处理材 纳米SiO_(2) 乳化蜡 尺寸稳定性
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乳化沥青对3DOM TiO_(2)雾封层材料的微观裹覆特征研究
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作者 王子晗 叶宇杰 +1 位作者 代一诺 李新舟 《市政技术》 2024年第5期31-39,共9页
采用三维有序大孔二氧化钛(3DOM TiO_(2))与雾封层技术相结合的方法降解路表附近的汽车尾气,可降低纳米TiO_(2)的团聚现象,提高尾气降解效果,但乳化沥青破乳后,3DOM TiO_(2)的微观裹覆特征与宏观降解性能之间的关系尚需进一步研究。因此... 采用三维有序大孔二氧化钛(3DOM TiO_(2))与雾封层技术相结合的方法降解路表附近的汽车尾气,可降低纳米TiO_(2)的团聚现象,提高尾气降解效果,但乳化沥青破乳后,3DOM TiO_(2)的微观裹覆特征与宏观降解性能之间的关系尚需进一步研究。因此,首先采用扫描电子显微镜(SEM)、物理吸附试验(BET)和压汞试验(MIP)测试并分析了不同孔径(200~500 nm)的3DOM TiO_(2)颗粒被乳化沥青裹覆前后的表面微观形貌、比表面积、孔径分布和孔体积。其次采用课题组自主设计的光催化性能测试分析系统测试了不同孔径的3DOM TiO_(2)雾封层材料对NO_x的降解效果,并结合孔径对3DOM TiO_(2)微观裹覆特征的影响规律,分析验证了3DOM TiO_(2)的微观裹覆特征与宏观降解性能之间的关系。研究结果表明:当孔径为300 nm时,3DOM TiO_(2)颗粒被沥青裹覆后材料中的有效孔道和比表面积最大,降解率最高。当光催化剂掺量为2%、孔径为300 nm时,3DOM TiO_(2)雾封层材料的降解率较纳米TiO_(2)雾封层材料提高了15.1%;较孔径为200、500 nm的3DOM TiO_(2)雾封层材料分别提高了5.2%、12.5%。 展开更多
关键词 机动车尾气 乳化沥青 3DOM TiO_(2)雾封层 裹覆状态 降解性能
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水性环氧乳液的制备与MS-2型微表处性能 被引量:3
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作者 李悦 赵晨轶 +1 位作者 吴玉生 黄舟 《北京工业大学学报》 CAS CSCD 北大核心 2023年第8期874-883,共10页
以环氧树脂E51和聚乙二醇(polyethyleneglycol,PEG)为原料,通过相反转法制备水性环氧乳液,通过探究PEG相对分子质量和乳化剂用量对乳液的黏度、粒径以及稳定性的影响,筛选出综合性能最佳的水性环氧乳液,并分析该乳液固化后水性环氧树脂(... 以环氧树脂E51和聚乙二醇(polyethyleneglycol,PEG)为原料,通过相反转法制备水性环氧乳液,通过探究PEG相对分子质量和乳化剂用量对乳液的黏度、粒径以及稳定性的影响,筛选出综合性能最佳的水性环氧乳液,并分析该乳液固化后水性环氧树脂(waterborne epoxy resin,WER)的热稳定性、微观结构。使用荧光显微镜探究水性环氧树脂与乳化沥青的相容性,并得出最佳的水性环氧树脂质量掺量。在此基础上制备MS-2型水性环氧树脂改性乳化沥青微表处,考察不同水性环氧树脂改性乳化沥青制备方法、不同固化剂种类对微表处混合料施工性能和路用性能的影响,并分析自制乳液和市售乳液的性价比及对应微表处性能的性价比。结果表明,当PEG相对分子质量为6 000、乳化剂质量掺量为20%时得到的水性环氧乳液综合性能最佳,对应的水性环氧树脂具备优异的热稳定性和良好的微观结构。水性环氧树脂质量掺量为6%时得到的水性环氧树脂改性乳化沥青相容性最好。最佳的水性环氧树脂改性乳化沥青制备方法是水性环氧乳液与乳化沥青混合后再加入水性环氧固化剂;相较于基础胺类固化剂,水性环氧固化剂制备的微表处具有更加优异的综合性能。自制水性环氧乳液性价比高于市售乳液,具备较好的应用价值。 展开更多
关键词 道路工程 水性环氧乳液 改性乳化沥青 MS-2型微表处 施工及路用性能 性价比分析
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Research on a New Process of Preparation for Nano-SiO_2 with High Activity and Mesopores 被引量:4
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作者 Ruijing ZHANG Ke YANG Tianyng XIONG Institute of Metal Resarch,Chinese Academy of Sciences,Shenyang 110016, China 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2004年第3期353-356,共4页
Nano-SiO_2 with high activity and mesopores was prepared through sol-gel synthesis followed by low-temperatureheat treatment and ball milling firstly in our experiments. TEM was performed to measure particle sizes. Ni... Nano-SiO_2 with high activity and mesopores was prepared through sol-gel synthesis followed by low-temperatureheat treatment and ball milling firstly in our experiments. TEM was performed to measure particle sizes. Nitrogenadsorption experiments were carried out to estimate specific surface area, porous distribution and porous ratio by BETand BJH methods. The content of Si-OH in SiO_2 surface was calculated by analysis of the results of hydrogen-oxygencontent mensuration (HOCM). As a result, appropriate heat treatment system and ball milling time are important topreparation for nano-SiO_2 with high activity and mesopores, which are 5~50 nm particles, 5~6 nm average aperture,85%~93% porous ratio, and 51%~55% Si-OH content in surface. Nano-SiO_2 with that structure has high surfaceenergy and activity. This process, which has simple facilities and operation rules, is a new way of preparation fornano-SiO_2 with high activity and mesopores. 展开更多
关键词 Heat treatment Ball milling MESOPORES nano-sio_2
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短碳链结构磷脂在Zn-Fe_(3)O_(4)@SiO_(2)催化作用下的制备及其性能 被引量:2
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作者 张江华 王婷 +5 位作者 姚佳杉 唐晶晶 马佳 张伟 李子轩 周大勇 《精细化工》 EI CAS CSCD 北大核心 2023年第5期1113-1122,1154,共11页
通过溶胶-凝胶法和浸渍法制备了负载Zn的SiO_(2)包覆Fe_(3)O_(4)(Zn-Fe_(3)O_(4)@SiO_(2)),采用SEM、TEM、XPS、Py-IR、VSM、EDS对其进行了表征。将Zn-Fe_(3)O_(4)@SiO_(2)用于催化大豆卵磷脂(SLs)与短碳链脂肪酸(丙酸和丁酸)间的酸解... 通过溶胶-凝胶法和浸渍法制备了负载Zn的SiO_(2)包覆Fe_(3)O_(4)(Zn-Fe_(3)O_(4)@SiO_(2)),采用SEM、TEM、XPS、Py-IR、VSM、EDS对其进行了表征。将Zn-Fe_(3)O_(4)@SiO_(2)用于催化大豆卵磷脂(SLs)与短碳链脂肪酸(丙酸和丁酸)间的酸解反应来制备新型短碳链结构磷脂(SCSPLs)乳化剂,并对SCSPLs进行了性能测定。结果表明,核壳结构Zn-Fe_(3)O_(4)@SiO_(2)磁性微球负载了大量的活性组分Zn,因而可高效催化制备SCSPLs,在m(SLs)∶m(C3∶0)∶m(C4∶0)=1∶4∶4、催化剂用量为原料总质量的5%、反应温度为50℃、反应时间为5 h的条件下,SCSPLs的短碳链脂肪酸接入率可高达78.15%±1.08%(丙酸和丁酸的接入率分别为35.43%±0.62%和42.72%±0.55%),且Zn-Fe_(3)O_(4)@SiO_(2)可通过外加磁场进行简单分离,循环5次而无明显失活;与SLs相比,SCSPLs的乳化性、分散性和氧化稳定性均得到很大的提高。 展开更多
关键词 功能乳化剂 结构磷脂 短碳链 Fe_(3)O_(4)@SiO_(2) 酸解 食品添加剂
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Ultraviolet shielding property of crylic acid resin filled with nano-SiO_2
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作者 阎瑞 吴行 +1 位作者 马世宁 徐滨士 《Journal of Central South University》 SCIE EI CAS 2005年第S2期226-229,共4页
The present status and development trends of nano-composite coatings were briefly introduced. The nano-SiO2 was dispersed into crylic acid resin by ultrasonic wave and high-energy ball milling, the influence of nano-S... The present status and development trends of nano-composite coatings were briefly introduced. The nano-SiO2 was dispersed into crylic acid resin by ultrasonic wave and high-energy ball milling, the influence of nano-SiO2 on shielding property of coatings was investigated. Relation between particle size distribution of original nano-SiO2 and its dispersal in water and alcohol after treatment were analyzed, respectively. The ultraviolet permeation rate of coatings filled with nano-SiO2 was detected by ultraviolet spectral photometer. And the particle size distribution of coatings was examined by TEM. The results show that particle size distribution is comparative convergence and smaller one order of magnitude after dispersal treatment. The size of most nano-SiO2 in coatings is smaller than 100nm, which indicates that the amount of nano-SiO2 in the resin is 20% (solid content of resin), the permeation rate of ultraviolet of composite coatings decreases to 20%. The research of its excellent ultraviolet shielding property mechanism indicates minor size and high surface energy of nano-SiO2 can produce different absorption, reflection and scatter actions to different wavelengths. 展开更多
关键词 nano-composite coatings nano-sio_2 crylic acid resin ultraviolet shielding
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Mechanical Properties and Fire Retardancy of Wood Flour/High-Density Polyethylene Composites Reinforced with Continuous Honeycomb-Like Nano-SiO_(2)Network and Fire Retardant
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作者 Haiyang Zhou Xiaoyu Wang +2 位作者 Xiaolong Hao Qingwen Wang Rongxian Ou 《Journal of Renewable Materials》 SCIE EI 2020年第5期485-498,共14页
The mechanical properties of wood flour/high-density polyethylene composites(WPC)were improved by adding a small amount of nano-SiO_(2)to obtain a network-structured WPC with a continuous honeycomb-like nano-SiO_(2)ne... The mechanical properties of wood flour/high-density polyethylene composites(WPC)were improved by adding a small amount of nano-SiO_(2)to obtain a network-structured WPC with a continuous honeycomb-like nano-SiO_(2)network.The wood flour was modified with a fire retardant(a mixture of sodium octabonate and amidine urea phosphate)to improve its fire retardancy.The flexural properties,creep resistance,thermal expansion,and fire retardancy of the WPC were compared to a control(WPCCTRL)without nano-SiO_(2)or fire retardant.The flexural strength and modulus of the WPC containing only 0.55 wt.%nano-SiO_(2)were 6.6%and 9.1%higher than the control,respectively,while the creep strain and thermal expansion rate at 90°C were 33.8%and 13.6%lower,respectively.The cone calorimetry tests revealed that the nano-SiO_(2)network physically shielded the WPC,giving it lower heat release and smoke production rates.The thermal expansion was further decreased by incorporating fire retardants into the WPC,which showed the lowest total heat release and total smoke production and the highest mass retention.This study demonstrates a facile procedure for producing WPC with desired performances by forming a continuous honeycomb-like network by adding a small amount of nanoparticles. 展开更多
关键词 Wood plastic composites nano-sio_(2) mechanical properties CREEP fire retardancy
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PREPARATION OF POLYSTYRENE/SiO_2 COMPOSITE NANOPARTICLES BEARING SULFONIC GROUPS ON THE SURFACE VIA EMULSION COPOLYMERIZATION USING A POLYMERIZABLE EMULSIFIER
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作者 于建 《Chinese Journal of Polymer Science》 SCIE CAS CSCD 2009年第5期629-637,共9页
Functionalized PS/SiO_2 composite nanoparticles bearing sulfonic groups on the surface were successfully synthesized via emulsion copolymerization using a polymerizable emulsifierαolefin solfonate(AOS).As demonstrate... Functionalized PS/SiO_2 composite nanoparticles bearing sulfonic groups on the surface were successfully synthesized via emulsion copolymerization using a polymerizable emulsifierαolefin solfonate(AOS).As demonstrated by transmission electron microscopy and atomic force microscopy,well-defined core-shell PS/SiO_2 composite nanoparticles with a diameter of 50 nm were obtained.Sulfonic groups introduced onto the surface of the composite nanoparticles were quantified by FTIR,and can be controlled to some exten... 展开更多
关键词 PS/SiO_2 composite nanoparticles Polymerizable emulsifier Core-shell structure Sulfonic functionalization.
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Synthesis and Characterization of Modified Epoxy Resins by Silicic Acid Tetraethyl Ester and Nano-SiO_2
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作者 李海燕 张之圣 《Transactions of Tianjin University》 EI CAS 2004年第2期105-108,共4页
A kind of modified epoxy resins was obtained by condensation of epoxy resin with silicic acid tetraethyl ester(TEOS) and nano-SiO2. The reactions were performed with hydrochloric acid as a catalyst at 63 ℃. The str... A kind of modified epoxy resins was obtained by condensation of epoxy resin with silicic acid tetraethyl ester(TEOS) and nano-SiO2. The reactions were performed with hydrochloric acid as a catalyst at 63 ℃. The structure, thermal stability and morphological characteristics of the modified epoxy resins were studied through infrared spectra(FT-IR) analysis, thermogravimetric(TG) analysis and scanning electron microscopy respectively. It has been found from the IR and TG study that modified epoxy resins have greater thermal stability than epoxy resins, and its thermal stability has been improved by the formation of inter-crosslinked network structure. The modified epoxy resins exhibit heterogeneous morphology and heterogeneity increases with more TEOS feeding, which in turn confirms the formation of inter-crosslinked network structure in modified epoxy resins. 展开更多
关键词 epoxy resin silicic acid tetraethyl ester(TEOS) nano-sio_2 IR thermogravimetric analysis
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基于Pickering乳液的纳米SiO_(2)乳化沥青稳定性研究 被引量:2
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作者 李红英 汪芳 +2 位作者 陈其中 杨雄伟 王思尧 《建筑施工》 2023年第2期344-347,共4页
依托筛上剩余量、储存稳定性2个宏观指标和颗粒粒度分析这一微观指标,分别对基于Pickering乳液的稳定机理开发的新型纳米SiO_(2)乳化沥青(Pickering乳化沥青)与传统普通乳化沥青的物理稳定性、机械稳定性和化学稳定性进行深入研究和对... 依托筛上剩余量、储存稳定性2个宏观指标和颗粒粒度分析这一微观指标,分别对基于Pickering乳液的稳定机理开发的新型纳米SiO_(2)乳化沥青(Pickering乳化沥青)与传统普通乳化沥青的物理稳定性、机械稳定性和化学稳定性进行深入研究和对比。试验结果表明:在乳化沥青储存初期,Pickering乳化沥青和传统普通乳化沥青差距不大,超过5 d后传统普通乳化沥青储存稳定性急剧下降,而Pickering乳化沥青仍保持良好的稳定性,优势明显。因此,实际工程应用中一旦出现乳化沥青需要储存5d以上的情况,传统普通乳化沥青难以满足要求,而Pickering乳化沥青则解决了传统普通乳化沥青长期储存稳定性不足的难题。 展开更多
关键词 乳化沥青 纳米SiO_(2) Pickering乳液 储存稳定性
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Effect of nano TiO_(2) and SiO_(2) on gelation performance of HPAM/PEI gels for high-temperature reservoir conformance improvement
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作者 Yang Liu Hong-Jun Zhang +5 位作者 Dao-Yi Zhu Zi-Yuan Wang Jun-Hui Qin Qi Zhao Yu-Heng Zhao Ji-Rui Hou 《Petroleum Science》 SCIE EI CAS CSCD 2023年第6期3819-3829,共11页
Nanoparticles have been widely used in polymer gel systems in recent years to improve gelation performance under high-temperature reservoir conditions. However, different types of nanoparticles have different effects ... Nanoparticles have been widely used in polymer gel systems in recent years to improve gelation performance under high-temperature reservoir conditions. However, different types of nanoparticles have different effects on their gelation performance, which has been little researched. In this study, the high-temperature gelation performance, chemical structure, and microstructure of polymer gels prepared from two nanomaterials (i.e., nano-SiO_(2) and nano-TiO_(2)) were measured. The conventional HPAM/PEI polymer gel system was employed as the control sample. Results showed that the addition of nano-TiO_(2) could significantly enhance the gel strength of HPAM/PEI gel at 80 ℃. The gel strength of the enhanced HPAM/PEI gel with 0.1 wt% nano-TiO_(2) could reach grade I. The system also had excellent high-temperature stability at 150 ℃. The enhanced HPAM/PEI gel with 0.02 wt% nano-TiO_(2) reached the maximum gel strength at 150 ℃ with a storage modulus (G′) of 15 Pa, which can meet the need for efficient plugging. However, the nano-SiO_(2) enhanced HPAM/PEI polymer gel system showed weaker gel strength than that with nano-TiO_(2) at both 80 and 150 ℃ with G′ lower than 5 Pa. Microstructures showed that the nano-TiO_(2) enhanced HPAM/PEI gel had denser three-dimensional (3D) mesh structures, which makes the nano-TiO_(2) enhanced HPAM/PEI gel more firmly bound to water. The FT-IR results also confirmed that the chemical structure of the nano-TiO_(2) enhanced HPAM/PEI gel was more thermally stable than nano-SiO_(2) since there was a large amount of –OH groups on the structure surface. Therefore, nano-TiO_(2) was more suitable as the reinforcing material for HPAM/PEI gels for high-temperature petroleum reservoir conformance improvement. 展开更多
关键词 Nano-TiO_(2) nano-sio_(2) Gel strength Polymer gel High-temperature reservoirs.
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乳化异氟醚对缺氧复氧乳鼠心肌细胞的保护作用及bcl-2、bax表达的影响 被引量:12
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作者 谭兴琴 陈玉培 +1 位作者 张文胜 刘进 《第三军医大学学报》 CAS CSCD 北大核心 2008年第17期1611-1614,共4页
目的观察乳化异氟醚(8%体积分数)对培养乳鼠心肌细胞模拟缺血再灌注损伤后心肌细胞凋亡及凋亡相关基因bcl-2、bax的mRNA与蛋白水平表达的影响。方法利用原代培养的Wistar乳鼠心肌细胞建立模拟心肌缺血再灌注模型,分正常培养组、模型组... 目的观察乳化异氟醚(8%体积分数)对培养乳鼠心肌细胞模拟缺血再灌注损伤后心肌细胞凋亡及凋亡相关基因bcl-2、bax的mRNA与蛋白水平表达的影响。方法利用原代培养的Wistar乳鼠心肌细胞建立模拟心肌缺血再灌注模型,分正常培养组、模型组、脂肪乳组、乳化异氟醚(终浓度0.28mmol/L)。各组心肌细胞做相应分组处理后,利用倒置显微镜观察心肌细胞的生长状态和搏动频率,并用透射电镜观察细胞超微结构改变;流式细胞仪检测心肌细胞凋亡率;RT-PCR检测心肌细胞凋亡基因bcl-2 mRNA、bax mRNA的表达。Western blot定量检测Bcl-2、Bax蛋白表达。结果乳化异氟醚组和脂肪乳组均可显著降低细胞凋亡率(P<0.05),但乳化异氟醚组与脂肪乳组比较降低更明显(P<0.05)。乳化异氟醚可显著上调Bcl-2表达(P<0.05)、下调Bax表达(P<0.05);脂肪乳对Bcl-2和Bax表达无影响(P>0.05)。结论乳化异氟醚及其其中的成分之一脂肪乳可抑制模拟缺血再灌注损伤心肌细胞的凋亡;乳化异氟醚对缺氧复氧损伤的抗凋亡作用与其心肌细胞Bcl-2表达上调和Bax表达下调有关。 展开更多
关键词 乳化异氟醚 再灌注损伤 心肌细胞培养 心肌保护 凋亡 bcl-2 BAX
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乳化重油含水量对锅炉NO_x和SO2排放的影响 被引量:7
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作者 钟北京 傅维标 《燃烧科学与技术》 EI CAS CSCD 1998年第4期333-341,共9页
乳化重油是对节能和环保都具有重要意义的乳化状混合燃料,具有广泛的应用前景。本研究通过反应动力学模型计算了乳化重油燃烧过程中NOx和SO2的形成规律,以及乳化重油含水量。
关键词 乳化重油 锅炉 氮氧化物 二氧化硫 排放
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ERK1/2激活参与乳化异氟醚后处理的脑保护作用 被引量:2
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作者 王志萍 朱雯 王元琳 《临床麻醉学杂志》 CAS CSCD 北大核心 2012年第1期68-70,共3页
目的观察细胞外信号调节激酶1/2(ERK1/2)的激活在8%乳化异氟醚后处理对大鼠局灶性脑缺血-再灌注损伤中的作用。方法健康成年雄性SD大鼠48只,随机均分为六组:假手术组(S组)、缺血-再灌注组(IR组)、乳化异氟醚后处理组(EI组)、ERK抑制剂PD... 目的观察细胞外信号调节激酶1/2(ERK1/2)的激活在8%乳化异氟醚后处理对大鼠局灶性脑缺血-再灌注损伤中的作用。方法健康成年雄性SD大鼠48只,随机均分为六组:假手术组(S组)、缺血-再灌注组(IR组)、乳化异氟醚后处理组(EI组)、ERK抑制剂PD98059组(PD组)、乳化异氟醚后处理+PD98059组(EP组)、溶媒DMSO组(D组)。除S组外,均采用大脑中动脉阻闭2h,再灌注24h建立局灶性脑缺血-再灌注模型。缺血2h恢复再灌注即刻,EI组、EP组腹腔注射8%乳化异氟醚10.5ml/kg,其余各组注射生理盐水10.5ml/kg。PD组、EP组和D组于再灌注前30min侧脑室分别注入PD98059和DMSO。再灌注24h时进行神经功能缺陷评分(NDS评分),并观察组织形态学变化及细胞凋亡、p-ERK1/2阳性表达。结果与IR组相比,EI组NDS评分降低,凋亡细胞减少,磷酸化ERK1/2(p-ERK1/2)表达上调(P<0.05);与EI组相比,EP组NDS评分增高,凋亡细胞显著增加,p-ERK1/2表达下调(P<0.05)。结论 8%乳化异氟醚后处理通过激活ERK1/2信号通路对抗局灶性脑缺血-再灌注损伤。 展开更多
关键词 乳化异氟醚 缺血后处理 再灌注损伤 细胞外信号调节激酶1/2
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一步法合成氨基负载固体二氧化碳吸附材料
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作者 陈熹圣 冀昕航 +3 位作者 李岚新 邹威 梁胜轲 张晨 《高分子材料科学与工程》 EI CAS CSCD 北大核心 2024年第4期1-7,共7页
将丙烯酸十八酯(OA)与支化聚乙烯亚胺(B-PEI)进行迈克尔(Michael)加成反应合成了PEI-OA两亲性接枝共聚物,将其作为大分子乳化剂引入浓乳液体系,利用乳液模板制得了氨基负载的聚苯乙烯多孔材料,实现了一步法制备氨基负载固体CO_(2)吸附... 将丙烯酸十八酯(OA)与支化聚乙烯亚胺(B-PEI)进行迈克尔(Michael)加成反应合成了PEI-OA两亲性接枝共聚物,将其作为大分子乳化剂引入浓乳液体系,利用乳液模板制得了氨基负载的聚苯乙烯多孔材料,实现了一步法制备氨基负载固体CO_(2)吸附材料。研究了大分子乳化剂的结构、乳化剂用量,以及浓乳液的分散相体积分数对吸附材料的微观形貌及CO_(2)吸附量的影响,结果表明,所制备的PEI-OA乳化剂更倾向于形成O/W型乳液,形成了颗粒紧密堆积型的多孔结构,并且多孔通道会随着乳化剂与分散相体积分数的改变而变化。采用气体吸附分析仪测定了氨基负载多孔聚合物材料的CO_(2)吸附量,结果表明,PEI含量、乳化剂用量和分散相体积分数的适度增加均能提高产物对CO_(2)的吸附量,吸附量最高可达到2.65mmol/g。样品的循环性能测试显示,材料循环使用5次后吸附能力仅下降了0.15%,表明所制备的氨基负载二氧化碳吸附材料具有良好的工业应用前景。 展开更多
关键词 大分子乳化剂 一步法 乳液模板法 CO_(2)吸附 氨基负载
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