无离子快速透系统用于液体插头的扩散驱动降解
Yuexin Tian1, Yintao Liu1, Haifeng Dong1
1Petroleum Engineering Technology Institute of Southwest Petroleum Branch, SINOPEC, Deyang 618000, China.
Polymers
|July 12, 2025
概括
这项研究引入了一种新策略,用于在高温油库中使用的液体凝插头的更快降解. 改进的插头设计确保了快速故障,提高了区域隔离效率.
科学领域:
- 石油工程是石油工程中的一个.
- 材料科学 材料科学 材料科学
- 聚合物化学 聚合物化学
背景情况:
- 可降解液体凝插头对于高温水库的区域隔离至关重要.
- 电流插头遭受缓慢的退化和不完全的结构故障,限制其实际应用.
- 有效的区域隔离需要在使用寿命后可可控地降解的插头.
研究的目的:
- 为环氧无水化物液体插头开发一个扩散驱动的降解策略.
- 在高温环境中提高插头的可分解性和结构故障.
- 通过一种新的方法来研究插头退化的机制.
主要方法:
- 使用了γ-黄 (GVL) 和一种非离子快速透剂 (Tb).
- 采用了多尺度的表征框架:胀指数,SEM-EDS,FTIR映射,CLSM,μ-CT,AFM和纳米印记.
- 在不同温度 (120-140°C) 和溶剂-插头比率 (1:1-5:1) 下评估了降解行为.
主要成果:
- 插头的膨胀指数为1.81GVL,并形成了20-30微米的树状降解通道.
- 功能组映射显示了和以太债券的优先分离.
- 观察到机械软化 (模块减少> 57%),降解时间从84小时减少到12小时,温度和溶剂比率增加.
结论:
- 一个"透诱导的软化-结合裂变-扩散通道构造"机制被验证.
- 开发的战略提供了一个有效的途径,用于智能降解下孔插头的降解控制.
- 这项研究解决了当前可降解插头在高温储应用中的局限性.
相关概念视频
01:15Theories of Dissolution: Diffusion Layer Model
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Dissolution, the process by which drug particles dissolve in a solvent, is explained by the diffusion layer model, a theoretical framework that simulates the absorption of oral drugs and allows us to analyze experimental data.
This process starts with a thin layer, saturated with the drug, forming at the interface between the solid and liquid. The solute then diffuses from this layer into the main solution. The Noyes-Whitney equation suggests that the rate of dissolution relies on the diffusion...
This process starts with a thin layer, saturated with the drug, forming at the interface between the solid and liquid. The solute then diffuses from this layer into the main solution. The Noyes-Whitney equation suggests that the rate of dissolution relies on the diffusion...
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01:17Pore Transport and Ion-Pair Transport
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Pore transport and ion-pair formation are critical mechanisms for the absorption and distribution of drugs in the body.
Pore transport, also known as convective transport, is a process where small molecules like urea, water, and sugars rapidly cross cell membranes as though there were channels or pores in the membrane. Although direct microscopic evidence is limited but the concept of pores or channels is widely accepted based on physiological evidence. Despite the lack of direct...
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01:17Passive Diffusion: Overview and Kinetics
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Passive diffusion is a critical process that allows small lipophilic drugs to cross the cell membrane along a concentration gradient. This mechanism's efficiency depends on four primary factors: the membrane's surface area, the drug's lipid-water partition coefficient, the concentration gradient, and the membrane's thickness.
When administered orally, drugs establish a substantial concentration gradient between the gastrointestinal (GI) lumen and the bloodstream, expediting...
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01:23Drug Absorption Mechanism: Passive Membrane Transport
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Passive transport is a method of drug absorption where small, lipid-soluble drugs can move across the cell membrane. This movement happens along the concentration gradient, which is a natural flow from higher to lower concentration areas. The speed at which the drug moves is directly related to its lipid–water partition coefficient. This means that the more a drug dissolves in lipids, the faster it diffuses or spreads throughout the body. It is important to note that most drugs are either...
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01:27Factors Influencing Drug Absorption: Drug Dissolution
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The pharmacokinetic journey of drugs from solid oral dosage forms into systemic circulation is multifaceted. It begins with disintegration, a prerequisite ensuring a solid dosage form's subdivision into minute particles. Dissolution occurs next as these granulated entities solubilize in gastrointestinal fluids. This solubilization is crucial for the succeeding stage, permeation, which describes the traversal of the drug across the intestinal membrane and its subsequent entry into the blood...
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01:09Theories of Dissolution: The Danckwerts' Model and Interfacial Barrier Model
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Various dissolution theories provide insight into the factors that influence the dissolution rate. Danckwerts' Model suggests that turbulence, rather than a stagnant layer, characterizes the dissolution medium at the solid-liquid interface. In this model, the agitated solvent contains macroscopic packets that move to the interface via eddy currents, facilitating the absorption and delivery of the drug to the bulk solution. The regular replenishment of solvent packets maintains the...
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