羟甲基水溶性酚醛树脂交联剂的合成及交联机理  

Synthesis and crosslinking mechanism of hydroxymethyl water-soluble phenolic resin crosslinker agent

作　　者：郭睿[1] 霍文生 王宁 何观伟 冯文佩 李秀环 GUO Rui;HUO Wen-sheng;WANG Ning;HE Guan-wei;FENG Wen-pei;LI Xiu-huan(Key Laboratory of Auxiliary Chemistry & Technology for Chemical Engineering,Ministry of Education, Shaanxi University of Science & Technology, Xi′an 710021, China;The Northwest Research Institute of Chemical Industry Co., Ltd., Xi′an 710061, China)

机构地区：[1]陕西科技大学教育部轻化工助剂化学与技术重点实验室,陕西西安710021 [2]西北化工研究院有限公司,陕西西安710061

出　　处：《陕西科技大学学报》2020年第4期81-86,共6页Journal of Shaanxi University of Science & Technology

基　　金：陕西省科技厅重点研发计划项目(2017ZDXM-GY-087,2017GY-185)。

摘　　要：以苯酚和甲醛为原料,NaOH为催化剂,采用两步碱催化法,合成了用于油田调剖堵水的羟甲基水溶性酚醛树脂交联剂.以游离甲醛和羟甲基含量作为衡量指标,分别探讨了反应时间、反应温度、催化剂用量、反应物摩尔比四个因素对合成的影响规律.设计4因素3水平正交试验对其合成工艺进行优化,得出水溶性酚醛树脂的合成较佳工艺条件为:反应温度85℃、反应时间30 min、催化剂用量2%、n(苯酚)∶n(甲醛)=1∶2,在此反应条件下,羟甲基的含量可以达到32.2%.合成的水溶性酚醛树脂在20℃下能保存840小时,有较好的稳定性.采用FT-IR对其结构进行了表征.采用了XPS对其与部分水解聚丙烯酰胺HPAM成胶的机理进行了分析,结果表明,HPAM分子中的伯胺与酚醛树脂中的羟甲基脱水缩合形成仲胺,酚醛树脂与HPAM发生交联反应.并探讨了凝胶对不同渗透率岩心的封堵效果.The hydroxymethyl water-soluble phenolic resin cross-linking agent was synthesized by using phenol and formaldehyde as raw materials and NaOH as catalyst for oil field profile control and water shutoff.The effects of reaction time,reaction temperature,catalyst dosage and reactant molar ratio were discussed by using free formaldehyde and methylol content as indicators.The 4-factor and 3-level orthogonal experiments were designed to optimize the synthesis process.The optimum conditions for the synthesis of water-soluble phenolic resin were as follows:Reaction temperature is 85℃,reaction time is 30 min,catalyst dosage is 2%,n(phenol)∶n(formaldehyde)is 1∶2,under the reaction conditions,the content of methylol group can reach 32.2%.The synthetis water-soluble phenolic resin can be stored for 840 hours at 20℃,so it has good stability.The structure was characterized by FT-IR.The crosslinking mechanism of Partially hydrolyzed polyacrylamide(HPAM)was analyzed by XPS.The results showed that the primary amine in HPAM molecule dehydrated and condensed with hydroxymethyl group in phenolic resin to form secondary amine.The phenolic resin reacted with HPAM.The ion resistance of the gel and the plugging effect on the core of different permeability were discussed.

关 键 词：水溶性酚醛树脂 两步碱催化法 羟甲基含量 正交优化 交联机理 

分 类 号：TE39[石油与天然气工程—油气田开发工程]