Revolutionizing self-healing materials: Complex micro-containers (CMC) for delivery of compartmentalized reactive agents

IF 4.9 2区化学 Q2 CHEMISTRY, PHYSICAL

Colloids and Surfaces A: Physicochemical and Engineering Aspects Pub Date : 2025-05-14 DOI:10.1016/j.colsurfa.2025.137213

Katerina Stamer , Madina Baltaeva , Maxim Orlov , Vikrant Wagle , Abdullah Yami

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引用次数: 0

Abstract

This study presents a Complex Micro-Container (CMC) system designed to transport compartmentalized reaction mixtures containing healing agents. Specifically designed for cementing operations in the oil and gas industry, the CMCs exhibit an autonomous ability to effect successful cement restoration. This is achieved by a mechanism that involves the in-situ formation of a self-expanding polyurethane foam following the rupture of the CMCs and the subsequent cross-linking reaction between the healing agents. The CMC system, consisting of polyurea microcapsules with curing agent embedded in a reactive monomer and encapsulated in an outer polyurethane shell, undergoes a two-step interfacial polymerization process. The system structure is characterized by Fourier transform infrared (FTIR) spectroscopy, thermal gravimetric and differential thermal analyzes (TGA and DTA), and scanning electron microscopy (SEM). Examination of the foam generated by the CMCs reveals an increase in initial volume of up to 165 %, highlighting the inherent expansion capacity of the system. Furthermore, computed tomography studies confirm the complete visual sealing of cracks using computer tomography technique and 19 % restoration of the compressive strength within the cement body loaded with only 5 % wt. CMCs. The synthesized material is shown to be a highly effective means of imparting self-healing properties to cement, which holds great promise for applications in the oil and gas industry by reducing the financial burden associated with costly repairs resulting from cementing failures, while improving well integrity.

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革命性的自我修复材料：复杂的微容器（CMC），用于递送区隔化的反应剂

本研究提出了一种复杂的微容器（CMC）系统，设计用于运输含有愈合剂的区隔反应混合物。cmc专为油气行业的固井作业而设计，具有成功固井的自主能力。这是通过一种机制实现的，该机制涉及在cmc破裂后原位形成自膨胀聚氨酯泡沫，以及随后愈合剂之间的交联反应。CMC系统由聚脲微胶囊组成，其中固化剂嵌入活性单体中，并包裹在聚氨酯外壳中，经过两步界面聚合过程。采用傅里叶红外光谱（FTIR）、热重分析（TGA）和差热分析（DTA）以及扫描电镜（SEM）对体系结构进行了表征。对cmc产生的泡沫的检查显示，初始体积增加了165% %，突出了系统固有的膨胀能力。此外，计算机断层扫描研究证实，使用计算机断层扫描技术可以完全实现裂缝的视觉密封，并且在仅加载5 % wt. cmc的水泥体内，抗压强度恢复了19% %。该合成材料被证明是一种赋予水泥自愈特性的高效手段，在油气行业中应用前景广阔，可以减少因固井失败而导致的昂贵维修费用，同时提高井的完整性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Colloids and Surfaces A: Physicochemical and Engineering Aspects 化学-物理化学

CiteScore

8.70

自引率

9.60%

发文量

2421

审稿时长

56 days

期刊介绍： Colloids and Surfaces A: Physicochemical and Engineering Aspects is an international journal devoted to the science underlying applications of colloids and interfacial phenomena. The journal aims at publishing high quality research papers featuring new materials or new insights into the role of colloid and interface science in (for example) food, energy, minerals processing, pharmaceuticals or the environment.