Study on the mechanism and performance of polymer gels by TE and PVA chemical cross‐linking
Study on the mechanism and performance of polymer gels by TE and PVA chemical cross‐linking
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DOI：
10.1002/app.52043
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发表时间：
2021-12
影响因子：
3
通讯作者：
Yanglong Zhou;Ruizhi Chu;Lulu Fan;Xianliang Meng;Jianqiao Zhao;Guoguang Wu;Xiao Li;Xiao F. Jiang;FanChao Sun
中科院分区：
文献类型：
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作者：
Yanglong Zhou;Ruizhi Chu;Lulu Fan;Xianliang Meng;Jianqiao Zhao;Guoguang Wu;Xiao Li;Xiao F. Jiang;FanChao Sun
聚合物凝胶作为钻井封堵材料应用广泛。本文将二异丙氧基二三乙醇胺钛（TE）与聚乙烯醇（PVA）溶液进行化学交联，得到凝胶材料。结果表明，PVA分子链上的羟基与TE交联剂中的钛离子通过络合反应发生化学交联，交联链段能抑制链运动，形成稳定的“螃蟹结构”凝胶构型。通过SEM、TG-DSC、GPC和接触角测量对在该构型下合成的凝胶材料进行表征和分析。综合考虑凝胶强度和成胶时间，TE交联剂浓度为2.2wt%时凝胶性能最佳。此外，该凝胶的模拟封堵实验表明，该凝胶的使用寿命约为72 d，封堵性能和拉伸恢复性能较以往有明显提高，这将为新型封堵材料的研究提供新的视角。
Polymer gels are widely used as drilling plugging materials. In this paper, titanium bis(triethanolamine)diisopropoxide (TE) and polyvinyl alcohol (PVA) solution were chemically cross‐linked to obtain a gel material. It shows that the OH on the PVA molecular chain are chemically cross‐linked with the Ti ion in TE crosslinking agent through complexation reaction, and the cross‐linked segment can inhibit the chain motion, resulting in a stable “crab structure” gel configuration. The gel materials synthesized under this configuration were characterized and analyzed by SEM, TG‐DSC, GPC, and contact angle measurement. It was demonstrated that the gel performance is optimal when the concentration of TE crosslinking agent is 2.2 wt%, considering the gel strength and gelation time. In addition, the simulated plugging experiment of the gel showed that the service life of the gel was about 72 days, and the sealing performance and tensile recovery performance were significantly improved compared with the previous ones, which would provide a new perspective for the novel plugging materials.