考察了在乙酸丁酯相中制备稳定均匀分散的纳米ITO浆料。选用两种分散剂聚乙烯吡咯烷酮(PVP)和钛酸酯(titanate),通过球磨分散法制备稳定ITO(indium tin oxide)浆料,并分析比较不同pH、分散剂用量、磨介氧化锆球粒径及用量和球磨时间对IT...考察了在乙酸丁酯相中制备稳定均匀分散的纳米ITO浆料。选用两种分散剂聚乙烯吡咯烷酮(PVP)和钛酸酯(titanate),通过球磨分散法制备稳定ITO(indium tin oxide)浆料,并分析比较不同pH、分散剂用量、磨介氧化锆球粒径及用量和球磨时间对ITO浆料分散稳定性的影响,研究分散机理。结果表明,在pH=7.8,分散剂用量为ITO粉体质量的5.5%,磨介氧化锆用量为ITO粉体质量的2.6倍,磨介氧化锆粒径小于0.5 mm,球磨分散时间24 h时,制得的纳米ITO浆料分散稳定性最佳;且比较由两种分散剂制得的ITO浆料在储存时间为0 d与30 d的浆料粒径变化,后者稳定性优于前者。展开更多
选用分散剂甲基纤维素(Methyl cellulose,MC),通过球磨分散法制备铟锡氧化物(Indium tin oxide,ITO)水相浆料;研究MC用量、ITO粉体用量和球磨分散时间对ITO浆料稳定性能的影响及MC的分散机理。研究结果表明:MC在球磨分散ITO浆料过程中...选用分散剂甲基纤维素(Methyl cellulose,MC),通过球磨分散法制备铟锡氧化物(Indium tin oxide,ITO)水相浆料;研究MC用量、ITO粉体用量和球磨分散时间对ITO浆料稳定性能的影响及MC的分散机理。研究结果表明:MC在球磨分散ITO浆料过程中起到很好的分散作用,它的分散机制为静电位阻稳定作用;当MC相对ITO粉体质量分数恒定时,随着MC用量、ITO粉体用量和球磨分散时间的增加,ITO浆料稳定性增强。当MC用量相对ITO粉体质量分数为15.0%,球磨分散时间为48 h时,ITO浆料稳定性最强,浆料在120 d内浆料分散稳定性指标R均小于1.8%。展开更多
为解决特低渗油藏细小空隙的封堵难题,减轻惰性封堵材料对钻井液润滑性造成的伤害,选用钻井液用纳米乳液作为外相,复合石墨微粉作为内相,在基材润湿剂、增溶剂的协同作用下,通过球磨分散工艺制备了一种石墨基复合材料SMD-1。研究表明,SM...为解决特低渗油藏细小空隙的封堵难题,减轻惰性封堵材料对钻井液润滑性造成的伤害,选用钻井液用纳米乳液作为外相,复合石墨微粉作为内相,在基材润湿剂、增溶剂的协同作用下,通过球磨分散工艺制备了一种石墨基复合材料SMD-1。研究表明,SMD-1的主要颗粒尺寸在3~15μm,加量3%时,钻井液API滤失量从38.5 m L减少到9.4 m L,高温高压滤失量从97.2 m L减少到30.0 m L,80目以细砂床侵入深度从20.0 cm减少到5.1 cm,同时钻井液润滑系数降低82.8%,高温高压粘附系数降低85.7%,封堵、润滑性能良好。在胜利油田滨425区块X138井进行了现场应用,应用井段井壁稳定,钻井液滤失量降低78.6%,润滑系数降低80.0%,封堵性和润滑性能突出,有效解决了井壁失稳及裂缝漏失问题。展开更多
The primary interest to this study was to investigate the effect of milling parameters on the size of hydrophobically modified starch particles, aiming to produce small, uniformly sized modified starch microspheres. O...The primary interest to this study was to investigate the effect of milling parameters on the size of hydrophobically modified starch particles, aiming to produce small, uniformly sized modified starch microspheres. Octie, a commercial product originated from cornstarch modified using Octenyl Succinate Anhydride （OSA）, was dispersed （3 wt%） using different media （water or ethanol） and subsequently wet-milled using a beads mill with zirconium beads at a rotation of 6,000 rpm up to 30 min. It was found that milling Octie in water dispersion for 3 min resulted in the smallest mean particle size （2.04 i 0.91 ktm）, compared to unmilled modified starch granules （15.2 ~ 6.0 lam）. Granular size and morphology changed considerably with further milling. For instance, very dense clusters with variable particle sizes （20.6 ~ 10.0 lam） were obtained after 30 min milling. As depicted by Scanning Electronic Microscopy, a large number of particles were apparently flattened during the milling process rather than broken, forming aggregates. Ultimately, within the range of experimental conditions tested, production of sub-micron modified starch particles was not possible.展开更多
文摘为解决特低渗油藏细小空隙的封堵难题,减轻惰性封堵材料对钻井液润滑性造成的伤害,选用钻井液用纳米乳液作为外相,复合石墨微粉作为内相,在基材润湿剂、增溶剂的协同作用下,通过球磨分散工艺制备了一种石墨基复合材料SMD-1。研究表明,SMD-1的主要颗粒尺寸在3~15μm,加量3%时,钻井液API滤失量从38.5 m L减少到9.4 m L,高温高压滤失量从97.2 m L减少到30.0 m L,80目以细砂床侵入深度从20.0 cm减少到5.1 cm,同时钻井液润滑系数降低82.8%,高温高压粘附系数降低85.7%,封堵、润滑性能良好。在胜利油田滨425区块X138井进行了现场应用,应用井段井壁稳定,钻井液滤失量降低78.6%,润滑系数降低80.0%,封堵性和润滑性能突出,有效解决了井壁失稳及裂缝漏失问题。
文摘The primary interest to this study was to investigate the effect of milling parameters on the size of hydrophobically modified starch particles, aiming to produce small, uniformly sized modified starch microspheres. Octie, a commercial product originated from cornstarch modified using Octenyl Succinate Anhydride （OSA）, was dispersed （3 wt%） using different media （water or ethanol） and subsequently wet-milled using a beads mill with zirconium beads at a rotation of 6,000 rpm up to 30 min. It was found that milling Octie in water dispersion for 3 min resulted in the smallest mean particle size （2.04 i 0.91 ktm）, compared to unmilled modified starch granules （15.2 ~ 6.0 lam）. Granular size and morphology changed considerably with further milling. For instance, very dense clusters with variable particle sizes （20.6 ~ 10.0 lam） were obtained after 30 min milling. As depicted by Scanning Electronic Microscopy, a large number of particles were apparently flattened during the milling process rather than broken, forming aggregates. Ultimately, within the range of experimental conditions tested, production of sub-micron modified starch particles was not possible.
