起泡剂/稳泡剂/SiO_(2)复合泡沫缓速酸液体系协同增效性能  

Synergistic Performance of Foaming Agent/Stabilizer/SiO_(2)Composite Foam Retarded Acid System

作　　者：柳小虎 赖小娟[1,2] 曹红燕 王婷婷 党志强 LIU Xiao-Hu;LAI Xiao-Juan;CAO Hong-Yan;WANG Ting-Ting;DANG Zhi-Qiang(Shaanxi University of Science and Technology China Key Laboratory of Light Chemical,Auxiliaries for Light Industry,Xi′an 710021,China;Shaanxi Agricultural Products Processing Technology Research Institute,Xi′an 710021,China;Xi′an Changqing Chemical Group Co.,LTD.,Xi′an 710021,China)

机构地区：[1]陕西科技大学中国轻工业轻化工助剂重点实验室,西安710021 [2]陕西农产品加工技术研究院,西安710021 [3]西安长庆化工集团有限公司,西安710021

出　　处：《应用化学》2023年第1期91-99,共9页Chinese Journal of Applied Chemistry

基　　金：陕西省重点研发计划(No.2023-YBGY-307);陕西省国际科技合作项目(No.2020KW-025);西安市科技计划项目(No.22GXFW0014);陕西省教育厅项目(No.21JC005)。

摘　　要：为了有效控制液相中H^(+)向岩石表面的扩散,降低酸-岩反应速率,进而达到深度酸化刻蚀的目的,通过对纳米颗粒、稳泡剂与表面活性剂协同增效作用的研究,制备了一种泡沫稳定、耐温性能及缓速性能优异的泡沫缓速酸。室内通过对比不同纳米材料在酸液中的分散性能及纳米颗粒粒径对泡沫缓速酸性能的影响,优选出d=25 nm的亲水型Si O_(2)纳米材料。采用自制的两性表面活性剂(MAC)作为起泡剂,并加入自制的酸液稠化剂(SY-1)作为稳泡剂以达到稳泡作用。当w(Si O_(2))=1.5%、w(MAC)=1.0%、w(SY-1)=0.08%时,所形成的泡沫也更加致密,液膜厚度增强,泡沫稳定性提高,半衰期延长,从7 min增长到69 min;并且SY-1的加入提高了泡沫的耐高温性能,使体系在90℃时半衰期仍然能达到29 min。通过测定不同条件下酸岩反应速率并进行比较,结果表明,20%HCl基液的平均酸岩反应速率为1.148×10^(-3)mg/(cm^(2)·s),而实验室自制泡沫缓速酸液体系的平均酸-岩反应速率降至7.142×10^(-5)mg/(cm^(2)·s),降低了两个数量级,缓速率达到93.7%。结果表明,Si O_(2)纳米颗粒和稳泡剂的加入提高了体系的耐温性能,降低了酸-岩反应速率,为酸化工艺的实施提供了重要的理论依据。In order to effectively control the diffusion of H^(+)in the liquid phase to the rock surface,reduce the reaction rate of acid rock,and thus achieve the purpose of deep acidification etching,a foam retarded acid with excellent foam stability,temperature resistance and slow speed performance is prepared by studying the synergistic effect of nanoparticles,foam stabilizer and surfactant.By comparing the dispersion properties of different nano materials in acid solutions and the effect of particle size on the retarded acid properties of foam,hydrophilic SiO_(2)nano-materials with d=25 nm are selected.The self-made amphoteric surfactant MAC is used as foaming agent,and the self-made acid thickener(SY-1)is added as the foam stabilizer to achieve foam stabilization.When w(SiO_(2))=1.5%,w(MAC)=1.0%,w(SY-1)=0.08%,the formed foam is dense,the liquid film thickness is enhanced,the foam stability is improved,and the half-life was prolonged from 7 min to 69 min.SY-1 improves the high temperature resistance of the foam,so that the half-life of the system can still reach 29 min at 90℃.The core dissolution rates under different conditions are compared and the average core dissolution rate of 20%HCl solution is 1.148×10^(-3)mg/(cm^(2)·s)while the average core dissolution rate of self-made foam retarded acid solution system in the laboratory is reduced to 7.142×10^(-5)mg/(cm^(2)·s)which is reduced by 93.7%.The addition of SiO_(2)nanoparticles and foam stabilizer improves the temperature resistance of the system and reduces the acid rock reaction rate,which provides an important theoretical basis for the implementation of acidification process.

关 键 词：稳泡剂 两性表面活性剂 纳米材料 泡沫缓速酸 耐温性能 缓速率 

分 类 号：O633[理学—高分子化学] TE39[理学—化学]