水溶性聚轮烷交联剂的制备及其在水凝胶颗粒型调驱剂中的潜在应用
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国家自然科学基金“基于“滑轮”效应设计构筑聚合物微球及其在孔隙中的受力形变行为研究(项目编号 51774062)”、“基于ATRP制备核壳结构微球及其在孔隙介质中的运移行为研究”(项目编号 51504050)、“基于 MD制备双功能结构的缔合型聚合物及其在页岩压裂中的减阻与携砂行为研究”(项目编号51604052),重庆科技学院研究生科技创新计划项目“水溶性RAFT链转移剂的合成及其在调驱用凝胶分散体中的应用研究”(项目 YKJCX1820501)、“基于滑动效应制备调驱用体膨颗粒及其性质研究”(项目编号 YKJCX1720509)。


Preparation of Water-soluble Polyrotaxane Crosslinking Agent and Its Potential Application in Gel Particle Used for Profile Control and Displacement
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    摘要:

    提出一种将类似机械“滑轮”的化学结构引入到水凝胶中充当交联点的方案,以期赋予水凝胶颗粒更优异的形变能力。首先通过三步反应设计构筑出一种具有“滑轮”效应的水溶性聚轮烷交联剂,进而与丙烯酰胺交联共聚制备了凝胶颗粒。通过红外光谱、核磁共振、X射线衍射表征了交联剂的结构,对比研究了由聚轮烷交联剂制备的凝胶颗粒和由传统 N,N'-亚甲基双丙烯酰胺交联剂制备的凝胶颗粒的形变能力。结果表明,已引入双键的α-环糊精与改性聚乙二醇形成了包合结构,成功制备了聚轮烷交联剂。聚轮烷交联剂制备的凝胶颗粒具有更优异的形变能力,溶胀 10 h后,以聚轮烷交联剂合成的凝胶颗粒受力为 286.4 N时仍未发生破碎,且外力撤去后凝胶能够恢复至原始状态,而以传统交联剂制备的凝胶颗粒受到 174.2 N的力时即发生破碎。图 9参 15

    Abstract:

    In order to get more excellent deformation ability,a program was proposed that the chemical structure similar to a mechanical“pulley”was introduced in the network of hydrogel as cross-linking point. A kind of water-soluble polyrotaxane crosslinking agent with“pulley”effect was designed and prepared through three step reactions. Next,crosslinking copolymerization of polyrotaxane crosslinking agent with acrylamide was carried out to prepare gel particles. The structure of crosslinking agent was characterized by infrared spectroscopy,nuclear magnetic resonance and X-ray diffraction. The deformation ability of gel particles was also studied. The results showed that the inclusion compound was formed from α-cyclodextrin with double bond and modified polyethylene glycol,meaning that the polyrotaxane crosslinking agent was successfully prepared. After swelling for 10 hours,the gel particle prepared by polyrotaxane crosslinking agent was not broken and could restore the original state after receiving and withdrawing 286.4 N external force. However,the gel particle prepared by traditional crosslinking agent N,N'-methylenebis-acrylamide was broken after receiving 174.2 N external force. The deformability of gel particle prepared by polyrotaxane crosslinking agent was better than that of gel particle prepared by traditional crosslinking agent.

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  • 在线发布日期: 2019-05-10
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