A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Urea modified carbon nanotube well cementation cement paste and preparation method thereof
The invention discloses urea modified carbon nanotube well cementation cement paste which is prepared from the following raw materials in parts by weight: 100 parts of oil well cement, 1-2 parts of afluid loss agent, 0.02-0.15 parts of urea modified carbon nanotubes, 0.05-0.2 parts of a defoaming agent and 44 parts of clear water. The urea modified carbon nanotube is prepared by the following method: taking 1 part of a carbon nanotube, adding 10 parts of concentrated sulfuric acid and 30 parts of nitric acid, and performing mixing to obtain a solution A; carrying out ultrasonic treatment on the solution A at 140-150 DEG C for 3 hours, treating the solution A with a hydrogen peroxide aqueous solution with the mass fraction of 20% for 2-3 hours, performing centrifuging, washing the solutionA with distilled water until the solution A is neutral, carrying out suction filtration, and drying to obtain a solid S; sequentially adding 20 parts of acetonitrile and 1.2 parts of EDCI into the solid S to obtain a mixed solution B; adding 1.2 parts of urea and 2 parts of triethylamine sequentially into the mixed solution B, performing stirring for 2h at the room temperature, performing filtering and rotary evaporation to remove the solvent, recycling bottom-layer black solids, performing washing with deionized water, and performing drying. The mechanical property of the carbon nanotube well cementation cement paste is improved through the dispersity of urea modified carbon nanotubes in the well cementation cement paste.
本发明公开一种尿素改性碳纳米管固井水泥浆，由以下重量份的原料组成：油井水泥100份、降失水剂1‑2份、尿素改性碳纳米管0.02‑0.15份、消泡剂0.05‑0.2份和清水44份；尿素改性碳纳米管由以下方法制备：取碳纳米管1份，加入10份浓硫酸和30份硝酸，混合，得溶液A；溶液A在140‑150℃超声处理3h，用质量分数为20%的过氧化氢水溶液处理2‑3h，离心，用蒸馏水冲洗至中性，抽滤，干燥，得到固体S；向固体S中依次加入20份乙腈和1.2份EDCI，得到混合溶液B；向混合溶液B中依次加入1.2份尿素和2份三乙胺，室温下搅拌2h，过滤，旋蒸去除溶剂，回收底层黑色固体，用去离子水冲洗，干燥，即可。是通过尿素改性碳纳米管在固井水泥浆中的分散性，来提高碳纳米管固井水泥浆的力学性能。
Urea modified carbon nanotube well cementation cement paste and preparation method thereof
The invention discloses urea modified carbon nanotube well cementation cement paste which is prepared from the following raw materials in parts by weight: 100 parts of oil well cement, 1-2 parts of afluid loss agent, 0.02-0.15 parts of urea modified carbon nanotubes, 0.05-0.2 parts of a defoaming agent and 44 parts of clear water. The urea modified carbon nanotube is prepared by the following method: taking 1 part of a carbon nanotube, adding 10 parts of concentrated sulfuric acid and 30 parts of nitric acid, and performing mixing to obtain a solution A; carrying out ultrasonic treatment on the solution A at 140-150 DEG C for 3 hours, treating the solution A with a hydrogen peroxide aqueous solution with the mass fraction of 20% for 2-3 hours, performing centrifuging, washing the solutionA with distilled water until the solution A is neutral, carrying out suction filtration, and drying to obtain a solid S; sequentially adding 20 parts of acetonitrile and 1.2 parts of EDCI into the solid S to obtain a mixed solution B; adding 1.2 parts of urea and 2 parts of triethylamine sequentially into the mixed solution B, performing stirring for 2h at the room temperature, performing filtering and rotary evaporation to remove the solvent, recycling bottom-layer black solids, performing washing with deionized water, and performing drying. The mechanical property of the carbon nanotube well cementation cement paste is improved through the dispersity of urea modified carbon nanotubes in the well cementation cement paste.
本发明公开一种尿素改性碳纳米管固井水泥浆，由以下重量份的原料组成：油井水泥100份、降失水剂1‑2份、尿素改性碳纳米管0.02‑0.15份、消泡剂0.05‑0.2份和清水44份；尿素改性碳纳米管由以下方法制备：取碳纳米管1份，加入10份浓硫酸和30份硝酸，混合，得溶液A；溶液A在140‑150℃超声处理3h，用质量分数为20%的过氧化氢水溶液处理2‑3h，离心，用蒸馏水冲洗至中性，抽滤，干燥，得到固体S；向固体S中依次加入20份乙腈和1.2份EDCI，得到混合溶液B；向混合溶液B中依次加入1.2份尿素和2份三乙胺，室温下搅拌2h，过滤，旋蒸去除溶剂，回收底层黑色固体，用去离子水冲洗，干燥，即可。是通过尿素改性碳纳米管在固井水泥浆中的分散性，来提高碳纳米管固井水泥浆的力学性能。
Urea modified carbon nanotube well cementation cement paste and preparation method thereof
一种尿素改性碳纳米管固井水泥浆及其制备方法
NI JUN (author) / WANG TAO (author) / DOU QIAN (author) / WANG XIANXIAN (author) / YU XIAOLONG (author)
2020-07-24
Patent
Electronic Resource
Chinese
| European Patent Office | 2020
CCUS well cementation cement paste and preparation method thereof
| European Patent Office | 2024
| European Patent Office | 2023
| European Patent Office | 2024