文章摘要
哑铃状含氟聚合物在柴油乳液中破乳及机理
Demulsification Performance and Mechanism of Fluorinated Copolymers with Dumbbell-shaped Structure in Diesel Emulsions
投稿时间:2018-09-19  修订日期:2018-12-01
DOI:
中文关键词: 含氟多嵌段聚合物  破乳  界面张力  界面扩张流变性质
英文关键词: fluorinated multi-block copolymers  demulsification  interfacial tension  interfacial dilation interfacial dilation rheological
基金项目:新型炔醛法合成1,4-丁二醇加氢双中心催化剂的设计、制备与催化反应机理,国家自然科学基金面上项目(No.21673132)
作者单位E-mail
张越 山西大学化学化工学院 精细化学品教育部工程研究中心 zyue@sxu.edu.cn 
黄鑫 山西大学化学化工学院  
姜崴 山西省化工设计院  
白雪丽 山西大学化学化工学院  
温亮 山西大学化学化工学院  
赵永祥 山西大学化学化工学院 精细化学品教育部工程研究中心 yxzhao@sxu.edu.cn 
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中文摘要:
      评价了3种具有不同聚乙二醇(PEG)亲水链段长度的哑铃状含氟多嵌段聚合物(Fluorinated Multi-block Copolymers with Dumbbell-shaped Structure, FMCDSs)在0#柴油/水乳液中的破乳性能,并对比了聚醚类破乳剂、哑铃状的聚缩水甘油醚-PEG聚合物的破乳性能。结果显示:FMCDSs比碳氢类聚合物有更佳的破乳性能;FMCDSs的PEG链段长度对破乳性能有显着影响,以PEG-4000为亲水链段的FMCDSs在300 mg/L添加浓度下,30 ℃静置30 min后,可以达到95%的分油率。此外,通过界面张力、界面扩张流变性能表征发现:FMCDSs可以有效吸附到柴油/水界面,而含氟部分是产生良好破乳性能的主要因素。
英文摘要:
      The demulsification performance of 3 fluorinated multi-block copolymers with dumbbell-shaped structure (FMCDSs) containing different hydrophilic polyethylene glycol (PEG) segment in diesel/water emulsion were investigated, and compared with the demulsification performance of polyether demulsifiers and dumbbell-shaped polyglycerol-PEG polymers. The results show: FMCDSs have better demulsification performance than hydrocarbon polymers; the chain length of PEG has a significant effect on the demulsification performance, and the FMCDSs with PEG-4000 as hydrophilic segments separated 95% oil from the emulsion within 30 min at a dosage of 300 mg/L(30℃). In addition, based on the results of interfacial tension and interfacial dilation rheology measurements, it can be found that FMCDSs can effectively adsorbed to the diesel-water interface, and the fluorined groups are the major factor in producing good demulsification properties.
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