Page 216 - 《精细化工》2020年第6期
P. 216

第 37 卷第 6 期                             精   细   化   工                                  Vol.37, No.6
             202 0 年 6 月                             FINE CHEMICALS                                 June    2020


              油田化学品与油品添加剂
                   超支化含苯基聚硅氧烷亲 CO 特性及分子模拟
                                                                       2


                                                                      *
                                                  陈   睿,范   宏
                 (浙江大学  化学工程与生物工程学院  聚合与聚合物工程研究所  化学工程联合国家重点实验室,浙江  杭
                 州    310027)


                 摘要:通过水解缩聚法制备了含有不同苯基含量的超支化聚硅氧烷,考察了苯基的引入对超支化聚合物在 CO 2
                 中溶解性能的影响。浊点压力测试得出,苯基的引入在超支化结构中对聚合物在 CO 2 中的溶解度影响不大,超
                 支化聚合物中苯基含量的增加没有导致浊点压力的明显升高,有望实现作为 CO 2 增稠剂兼具较好的溶解度和增
                 稠性能。分子模拟计算分析了超支化聚硅氧烷和直链聚硅氧烷与 CO 2 分子间的相互作用以及超支化聚硅氧烷分
                 子间的相互作用,发现含苯基的超支化聚硅氧烷具有更低的内聚能密度(CED)和溶解度参数(δ),表现出更
                 弱的聚合物分子间相互作用,有利于超支化有机硅氧烷在 CO 2 体系中的溶解。
                 关键词:超支化聚硅氧烷;CO 2 亲和性;CO 2 增稠剂;分子模拟;油田化学品
                 中图分类号:O631.3      文献标识码:A      文章编号:1003-5214 (2020) 06-1282-07


                         CO 2-philic properties of hyperbranched phenyl-containing

                                     polysiloxanes with molecular simulation

                                                                      *
                                                  CHEN Rui, FAN Hong
                 (State Key Laboratory of Chemical Engineering, Institute of Polymer and Polymerization Engineering, College of
                 Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, Zhejiang, China)


                 Abstract:  Hyperbranched  polysiloxanes  with  different  phenyl  contents  were  prepared  by  hydrolytic
                 polycondensation.  The  effect  of  phenyl  on  the  solubility  of  hyperbranched  polymers  in  CO 2 was
                 investigated.  The  cloud  point  pressure  test  showed  that  the  introduction  of  phenyl  in  hyperbranched
                 structure  had  little  effect  on  the  solubility  of  polymer  in  CO 2,  while  the  increase  of  phenyl  content  in
                 hyperbranched polymer did not cause a significant increase of cloud point pressure, which is expected to
                 achieve  good  solubility  and  thickening  performance  as  a  CO 2  thickener.  The  interaction  between
                 hyperbranched  polysiloxane,  linear  polysiloxane  and  CO 2  molecules,  as  well  as  the  interaction  between
                 hyperbranched polysiloxane molecules were calculated and analyzed by molecular simulation calculation.
                 The  results  showed  that  the  hyperbranched  phenyl-containing  polysiloxanes  possessed  lower  cohesive
                 energy density (CED) and solubility parameter (δ), and exhibited a weaker intermolecular interaction of
                 polymers, which is beneficial to the dissolution of hyperbranched polysiloxane in CO 2.
                 Key words: hyperbranched polysiloxane; CO 2-philic properties; CO 2 thickener; molecular simulation; oil
                 field chemicals


                 超临界二氧化碳具有无毒环保、廉价易得、安                          张力低,容易进入岩层中,储层不易受到污染,非
            全不易燃、溶解能力强等优点,且超临界状态容易                             常适用于非常规油气资源的开采。中国拥有十分丰
            达到(p=7.38 MPa,θ=31.06  ℃),常作为溶剂用于                  富的非常规油气资源,大力开发非常规油气资源有
                                                                                        [7]
            化学反应、萃取分离等过程中              [1-5] 。近年来,超临界          利于调整中国能源供需关系 。由于超临界二氧化
            二氧化碳作为压裂液在石油气藏开采中的应用得到                             碳黏度极低,在开采过程中易出现携砂效率低、造
            广泛关注     [4,6-10] 。超临界二氧化碳扩散系数大、表面                 缝质量差、滤失较大等现象,影响开采效率                    [11-12] 。

                 收稿日期:2020-01-17;  定用日期:2020-03-17; DOI: 10.13550/j.jxhg.20200053
                 作者简介:陈   睿(1994—),女,硕士生。联系人:范   宏(1963—),男,教授,博士生导师,E-mail:hfan@zju.edu.cn。
   211   212   213   214   215   216   217   218   219   220   221