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发明公开
CN108485621A 用于改善固井水泥石力学性能的杂合纳米增强增韧剂 审中-实审 转让

用于改善固井水泥石力学性能的杂合纳米增强增韧剂
摘要：
本发明公开了用于改善固井水泥石力学性能的杂合纳米增强增韧剂，包括：（1）将苯乙烯磺酸钠、甲基丙烯酰氧乙基三甲基氯化铵和引发剂在温度70～80℃和氮气保护条件下缓慢滴入聚乙二醇甲基丙烯酸酯水溶液中，反应4～5 h，调节pH值至7～9，得到聚羧酸分散剂；（2）分别取氧化石墨和纳米二氧化硅溶解于水中，二者混合后在55～60℃条件下超声处理30～50min，得到杂合纳米二氧化硅-氧化石墨分散液；（3）将聚羧酸分散剂倒入杂合纳米二氧化硅-氧化石墨分散液中，在55～60℃条件下超声处理30～50 min，得到杂合纳米增强增韧剂。本发明从纳观尺度对固井水泥石进行增强增韧改性，更好地满足现场对水泥环的强度、弹塑性要求，具有广阔的市场前景。
摘要（英）：

The invention discloses a hybrid nano-reinforced toughening agent for improving mechanical properties of cementing cement stones. The hybrid nano-reinforced toughening agent is prepared by the following steps: (1) slowly dripping sodium p-styrene sulfonate, methacryloyloxyethyl trimethyl ammonium chloride and an initiator into a polyethylene glycol methacrylate aqueous solution at a temperature of70-80 DEG C and under the protection of nitrogen, reacting for 4-5 h, adjusting the pH value to 7-9, and obtaining a polycarboxylic acid dispersant; (2) taking and dissolving graphite oxide and nanosilica in water respectively, mixing the graphite oxide water solution with the nano silica water solution, subjecting the mixed solution to ultrasonic treatment for 30-50 min at 55-60 DEG C, and obtaining a hybrid nano silica-graphite oxide dispersion liquid; (3) pouring the polycarboxylic acid dispersant into the hybrid nano silica-graphite oxide dispersion liquid, performing ultrasonic treatment for 30-50 min at 55-60 DEG C, and obtaining the hybrid nano-reinforced toughening agent. According to the invention, the cementing cement stones are strengthened and toughening-modified from the nanometer scale, strength and elastoplasticity requirements of a cement sheath on site are better satisfied, and the hybrid nano-reinforced toughening agent has a broad market prospect.

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