用于临时堵塞的自降解橡胶塞及其降解机理。

IF 5 3区 化学 Q1 POLYMER SCIENCE Gels Pub Date : 2024-09-25 DOI:10.3390/gels10100615
Fan Yang, Fan Li, Renjing Ji, Xiaorong Yu, Huan Yang, Gaoshen Su
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引用次数: 0

摘要

为解决现有交联聚合物临时堵塞技术中存在的问题(如自降解性能差),开发了一种自降解橡胶塞(SDRP)。利用响应面分析法对合成配方进行了优化,最终确定了 SDRP 的优化组成:13 wt%的单体、0.02 wt%的引发剂、0.7 wt%的交联剂和 1.8 wt%的降解催化剂。在 70-120 °C 的条件下,SDRP 在 30-110 分钟内由液态转变为固态凝胶;降解时间为 3-10 天,完全降解溶液的粘度低于 20 mPa-s。当注入量为 1 PV SDPR 时,可达到 8.34 MPa 的突破压力。研究发现,不稳定交联剂的水解导致了 SDRP 的断裂。随着时间的推移,在温度和降解催化剂的共同作用下,不稳定交联剂中的官能团发生了水解。这一过程导致了交联点的破坏,从而使网络结构逐渐恶化。因此,一些不流动的水被转化为自由水。水分子的流动性不断增加,直至堵塞物完全降解为粘稠液体。这项研究丰富了临时堵塞凝胶系统。
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Self-Degradable Rubber Plug for Temporary Plugging and Its Degradation Mechanism.

A self-degradable rubber plug (SDRP) was developed to address issues in existing crosslinked polymer temporary plugging technology, such as poor self-degradation properties. The synthesis formula was optimized using response surface analysis, resulting in an optimized composition of the SDRP: 13 wt% monomer, 0.02 wt% initiator, 0.7 wt% crosslinker, and 1.8 wt% degradation catalyst. Under the condition of 70-120 °C, the SDRP was transformed from a liquid to a solid gel in 30-110 min; the degradation time was 3-10 days, and the viscosity of the completely degraded solution was lower than 20 mPa·s. At an injection volume of 1 PV SDPR, a breakthrough pressure of 8.34 MPa was achieved. The hydrolysis of the unstable crosslinker was found to have caused the breakage of the SDRP. Over time, the functional groups within the unstable crosslinker underwent hydrolysis due to the combined effects of temperature and the degradation catalyst. This process led to the disruption of crosslinking points, resulting in a gradual deterioration of the network structure. As a consequence, some immobile water was converted into free water. The mobility of water molecules increased until the plug was completely degraded into a viscous liquid. This study enriches the temporary plugging gel system.

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来源期刊
Gels
Gels POLYMER SCIENCE-
CiteScore
4.70
自引率
19.60%
发文量
707
审稿时长
11 weeks
期刊介绍: The journal Gels (ISSN 2310-2861) is an international, open access journal on physical (supramolecular) and chemical gel-based materials. Our aim is to encourage scientists to publish their experimental and theoretical results in as much detail as possible. Therefore, there is no restriction on the maximum length of the papers, and full experimental details must be provided so that the results can be reproduced. Short communications, full research papers and review papers are accepted formats for the preparation of the manuscripts. Gels aims to serve as a reference journal with a focus on gel materials for researchers working in both academia and industry. Therefore, papers demonstrating practical applications of these materials are particularly welcome. Occasionally, invited contributions (i.e., original research and review articles) on emerging issues and high-tech applications of gels are published as special issues.
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