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Synthesis and Surface Activity Study of a Novel Branched Fluorinated Anion Surfactant with CF_(3)CF_(2)CF_(2)C(CF_(3))_(2) Group

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Chinese Journal of Chemistry 2014年第10期32卷 995-998页

作者： Min Sha renming pan Lewu Zhan Ping Xing Biao Jiang School of Chemical Engineering Nanjing University of Science and Technology200 XiaolingweiNanjingJiangsu 210094China CAS Key Laboratory of Synthetic Chemistry of Natural Substances Shanghai Institute of Organic ChemistryChinese Academy of SciencesShanghai 200032China

A novel branched fluorinated anion surfactant 4-(3,3,4,4,5,5,5-heptafluoro-2,2-bis-trifluoromethyl-pentyl)-benzene lithium phosphonate was successfully synthesized via a four-step route using perfluoro-2-methyl-2-pentene as starting *** surface activity was *** result showed that the cmc value of the surfactant in water is about 1.5×10^(−2) mol/L at 298 K and the surface tension of the aqueous solution is 19.2 mN/m at the cmc.

关键词： branched fluorinated anion surfactant PFOA PFOS surface tension

Design and synthesis of the novel branched fluorinated surfactant intermediates with CF_3CF_2CF_2C(CF_3)_2 group

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Chinese Chemical Letters 2019年第3期30卷 566-568页

作者： Ding Zhang Min Sha renming pan Xiangyang Lin Ping Xing Biao Jiang School of Chemical Engineering Nanjing University of Science and Technology CAS Key Laboratory of Synthetic Chemistry of Natural Substances Shanghai Institute of Organic Chemistry Chinese Academy of Sciences School of Management Science & Engineering Nanjing University of Finance & Economics

Perfluorooctanoic acid(PFOA) or perfluorooctane sulphonate(PFOS) was one of the most prominent fluorosurfactants and applied widely in firefighting and daily chemical, etc. However, these surfactants have recently been identified as toxic and undegradability in the environment. Developing an efficient approach to environment-friendly fluorosurfactants is essential. A fluorocarbon branched chain strategy was adopted to develop/PFOS substitutes. A series of intermediates of novel branched fluorinated surfactants with CF_3 CF_2CF_2C(CF3)_2 group were synthesized from perfluoro-2-methyl-2-pentene. All the steps were mild, easy-handled and cheap. It is expected to be a very significant direction for the development of non-bioaccumulable alternatives of PFOA or PFOS.

关键词： Perfluoro-2-methyl-2-pentene Branched fluorinated surfactants Oxy fluorocarbon chain

Study on Test Methods for Flow Ability of Superfine Powder Extinguishing Agent

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Engineering Sciences 2008年第1期6卷 47-51页

作者： Cao Liying pan renming Yin Zhiping Kong Lingrui Shanghai Fire Research Institute Shanghai 200032 China School of Chemical Engineering Nanjing University of Science and Technology Nanjing 210094 China

According to the physical and chemical characteristics of superfine powder extinguishing agent,three test methods are selected to measure the flow *** studying and comparing various test methods,apparatus and conditio... 详细信息

关键词： superfine powder extinguishing agent flow ability test method test condition

Synthesis and Surface Activity of Novel Non-ionic Fluorosurfactants in Aqueous Solution

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Synthesis and Surface Activity of Novel Non-ionic Fluorosurf...

An efficient method for the preparation of dialkoxymethanes catalyzed by a Cu-NHC complex

中国化学会全国第十二届有机合成化学学术研讨会

作者： Lin,Chao pan,renming Xing,Ping Jiang,Biao School of Chemical Engineering Nanjing University of Science and Technology CAS Key Laboratory of Synthetic Chemistry of Natural Substances Shanghai Institute of Organic ChemistryChinese Academy of Sciences

Fluorosurfactants can be described as perfluorinated,where all hydrogen in the hydrophobic tail has been replaced by fluorine,or as partially *** recently,it has been identified that fluorinated compounds with C8-C15 chain lengths are hazardous *** branch is one of effective strategies for synthesis of non-bioaccumulable fluorinated *** designed one novel branched fluorinated surfactants and prepared through a three-step route using perfluoro-2-methyl-2-pentene as starting *** surface activities of that was investigated and found that exhibited excellent surface *** can reduce the surface tension of water to below20 mN/m,and the cmc value of FCO in water is about 1.6×10mol/L at 298 *** value of surface propertie of FCO are lower than that of sodium perfluorooctanoate.

关键词： fluorosurfactants non-bioaccumulable surface tension

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An efficient method for the preparation of dialkoxymethanes ...

中国化学会全国第十二届有机合成化学学术研讨会

作者： Zhan,Lewu pan,renming Xing,Ping Jiang,Biao School of Chemical Engineering Nanjing University of Science and Technology CAS Key Laboratory of Synthetic Chemistry of Natural Substances Shanghai Institute of Organic ChemistryChinese Academy of Sciences

The preparation of ethers is one of the most fundamental and frequently used important reactions in synthetic organic *** first example of the formation of carbon-oxygen single bonds,the Williamson ether synthesis,has been widely used for the preparation of symmetrical and unsymmetrical *** preparation of symmetrical formaldehyde acetals is a kind of reaction to synthesis *** compounds are accessible using methods suffered from the long time reaction and high *** metal catalysis is one of the most powerful tools available to chemists for the development of cleaner and more sustainable *** N-heterocyclic carbenes（NHCs） have gained a prominent place in the chemist’s toolbox due to their outstanding affinities to metal ***,we report an effective,simple and mild reaction using Cu-NHC complex[（ICy）CuCl;ICy = N,N-dicyclohexylimidazolyl]for preparing in good yields a series of symmetrical or un symmetrical dialkoxymethanes derived from primary alcohols.

关键词： Cu-NHC complex Dichloromethane Dialkoxymethanes unsymmetrical ether

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新型支链型氟碳表面活性剂的合成及性能研究

有机化学 2018年第12期38卷 3260-3269页

作者：林超潘仁明邢萍姜标南京理工大学化工学院南京210094 中国科学院上海有机化学研究所天然产物有机合成化学重点实验室上海200032

全氟辛基磺酸/全氟辛酸(PFOS/PFOA)类氟碳表面活性剂是性能最好、应用最广的一类氟碳表面活性剂,然而该类氟碳表面活性剂已被列为自然界中最难降解的有机污染物之一,采取引入氟碳支链的策略研发PFOS/PFOA替代物,以全氟-2-甲基-2-戊烯为... 详细信息

全氟辛基磺酸/全氟辛酸(PFOS/PFOA)类氟碳表面活性剂是性能最好、应用最广的一类氟碳表面活性剂,然而该类氟碳表面活性剂已被列为自然界中最难降解的有机污染物之一,采取引入氟碳支链的策略研发PFOS/PFOA替代物,以全氟-2-甲基-2-戊烯为原料合成了含CF_3CF_2CF_2C(CF_3)_2基团氟碳表面活性剂.表面活性研究表明,亲水基团种类对该类结构氟碳表面活性剂表面性能影响较大,亲水基团为氧化铵时表面活性最好.连接基团长短与亲水基团大小对表面活性影响一般,但提高两者的刚性可以有效提高表面活性.表面活性剂化合物中的羰基与带正电荷的氮原子会产成分子内相互作用,增强分子的刚性,进而提高表面活性.氧化铵型氟表面活性剂的临界胶束浓度为1.73×10^(-2)mol/L,临界胶束浓度时可使水的表面张力降低至19.93 mN/m,其与APG0810复配时具有极好的协同效应,在基本不改变表面张力的情况下,氟碳表活性剂的使用量可降低100倍.

关键词：全氟-2-甲基-2-戊烯支链型氟碳表面活性剂表面张力复配性能

含CF_3CF_2CF_2C(CF_3)_2基团支链型氟表面活性剂的合成及性能研究

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化学学报 2015年第5期73卷 395-402页

作者：沙敏张丁潘仁明邢萍姜标中国科学院上海有机化学研究所天然产物有机合成化学重点实验室上海市徐汇区零陵路345号200032 南京理工大学化工学院

全氟辛酸/全氟辛基磺酸(PFOA/PFOS)类氟表面活性剂因不易被生物降解且对环境有毒害作用,被列为持久性有机污染物.采用引入氟碳支链的策略作为PFOA/PFOS替代物的研发取向,以六氟丙烯二聚体为原料合成了新型阳离子型、两性型、双子型和非... 详细信息

全氟辛酸/全氟辛基磺酸(PFOA/PFOS)类氟表面活性剂因不易被生物降解且对环境有毒害作用,被列为持久性有机污染物.采用引入氟碳支链的策略作为PFOA/PFOS替代物的研发取向,以六氟丙烯二聚体为原料合成了新型阳离子型、两性型、双子型和非离子型氟表面活性剂,并对它们的表面活性和急性毒性性能进行了测试.结果表明,所合成的支链型表面活性剂表面活性高且毒性低.因此,基于六氟丙烯二聚体(HFPD)合成PFOS/PFOA替代物是一种简单、经济且环保的方法.

关键词：全氟辛酸(PFOA) 全氟-2-甲基-2-戊烯支链型氟表面活性剂表面张力临界胶束浓度急性毒性

CF_3I催化合成中氟夺取途径的密度泛涵理论研究

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有机化学 2015年第12期35卷 2522-2528页

作者：胡应杰潘仁明王万军南京理工大学化工学院南京210094 南京晓庄学院环境科学学院南京211171 中国科学院上海有机化学研究所上海200032

CF_3I在制冷剂、刻蚀剂、发泡剂、灭火剂以及有机氟工业等领域具有广泛的应用.在活性炭负载碱金属盐的催化下,以CHF_3和碘为原料,可直接合成CF_***_3及CF_4分别是该反应过程中重要的中间产物和副产物,而积碳则导致催化剂失活的重要原因... 详细信息

CF_3I在制冷剂、刻蚀剂、发泡剂、灭火剂以及有机氟工业等领域具有广泛的应用.在活性炭负载碱金属盐的催化下,以CHF_3和碘为原料,可直接合成CF_***_3及CF_4分别是该反应过程中重要的中间产物和副产物,而积碳则导致催化剂失活的重要原因.因此研究它们的产生机理具有重要意义.对此本文采用密度泛涵理论(DFT)方法进行了研究.结果表明:CF_2及CF_3可以对吸附于graphite(001)表面的CFCF_3进行多步氟夺取,最终得到CF_3、CF_4以及C_2自由基.以上氟夺取反应产生的C_2自由基也导致了实验中的积碳现象.上述反应机理与现有的实验数据相符.

关键词： CF3I 合成 CFCF3 氟夺取活性炭

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超细微粒灭火剂与火焰相互作用的数值模拟

南京理工大学学报 2014年第1期38卷 154-160页

作者：华敏徐大用潘旭海潘仁明南京理工大学化工学院江苏南京210094 南京工业大学火灾与消防工程研究所江苏南京210009 江苏省城市与工业安全重点实验室江苏南京210009

为了研究灭火过程中超细微粒灭火剂与火焰的相互作用,该文数值模拟了火场中超细微粒灭火剂在不同驱动压力下喷射后的运动特性。采用驱动速率模型、离散相模型和火源模型对灭火剂颗粒的释放、流动以及与火源作用的过程进行数值模拟。模... 详细信息

为了研究灭火过程中超细微粒灭火剂与火焰的相互作用,该文数值模拟了火场中超细微粒灭火剂在不同驱动压力下喷射后的运动特性。采用驱动速率模型、离散相模型和火源模型对灭火剂颗粒的释放、流动以及与火源作用的过程进行数值模拟。模拟结果表明:内壁收缩的喷嘴能够加强微粒穿透火羽流的能力,其穿透能力随着驱动压力的增大而增强。当与灭火剂微粒作用时,火焰高度减小,宽度增大。驱动压力越大,微粒到达火源表面所需要的时间越少;当达到全淹没状态时,在1.2 MPa的驱动压力下,火源处微粒浓度较高。在1.0 MPa的驱动压力下,火源处微粒浓度变化较小;较高驱动压力可以加快微粒在灭火室中全淹没状态形成的时间;当驱动压力较小时,更容易出现涡流,导致微粒快速充满整个灭火室,但是微粒浓度分布不均。

关键词：超细微粒灭火剂运动特性火羽流