有机金属化合物对静电喷雾产品形貌的影响
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摘要
初步探索添加有机金属化合物乙酰丙酮铜或乙酰丙酮铁的聚己内酯(PCL)/二氯甲烷(DCM)/N,N–二甲基甲酰胺(DMF)溶液在空气、无水乙醇及无水乙醇/去离子水(体积比为1∶1)等抗溶剂中的静电喷雾过程。使用扫描电子显微镜对制备的样品进行形貌表征。研究结果表明,两种有机金属化合物的添加能够提高母液的高分子链缠结浓度,倾向于生成颗粒产品而非纤维产品。与乙酰丙酮铁相比,乙酰丙酮铜能够在更大程度上提高高分子缠结浓度。随着母液中高分子浓度的增加,产品由颗粒向纤维转化。以空气作为抗溶剂的静电喷雾产品为表面光滑的颗粒与纤维,而以无水乙醇和无水乙醇/去离子水(体积比为1∶1)作为抗溶剂的静电喷雾的产品几乎为碗状颗粒。
The electrospraying of polycaprolactone(PCL)/dichloromethane(DCM)/N,N-dimethylformamide(DMF) solutions with addition of copper acetylacetonate or iron acetylacetonate in the antisolvent of air,absolute ethanol,or absoluteethanol/deionized water(the volume ratio 1∶1) were investigated. The morphologies of the product samples were characterized with scanning electrical microscopy(SEM). The results show that the addition of the two organometallics can increase the polymer chain entanglement concentration of the mother solution and be inclined to produce particles rather fibers. Compared to the iron acetylacetonate,the copper acetylacetonate can further increase the polymer chain entanglement concentration. With the increase in polymer concentration of the mother solution,the product is transferred from particles to fibers. The electrospraying in antisolvent of air gives the particles and fibers with smooth surfaces,while the electrospraying in antisolvent of absolute ethanol and absolute ethanol/deionized water(the volume ratio 1∶1) produces almost bowl-like particles.
The electrospraying of polycaprolactone(PCL)/dichloromethane(DCM)/N,N-dimethylformamide(DMF) solutions with addition of copper acetylacetonate or iron acetylacetonate in the antisolvent of air,absolute ethanol,or absoluteethanol/deionized water(the volume ratio 1∶1) were investigated. The morphologies of the product samples were characterized with scanning electrical microscopy(SEM). The results show that the addition of the two organometallics can increase the polymer chain entanglement concentration of the mother solution and be inclined to produce particles rather fibers. Compared to the iron acetylacetonate,the copper acetylacetonate can further increase the polymer chain entanglement concentration. With the increase in polymer concentration of the mother solution,the product is transferred from particles to fibers. The electrospraying in antisolvent of air gives the particles and fibers with smooth surfaces,while the electrospraying in antisolvent of absolute ethanol and absolute ethanol/deionized water(the volume ratio 1∶1) produces almost bowl-like particles.
引文
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[3]孙智.抗溶剂中的静电喷雾与纺丝形貌调控与机理研究[D].合肥:合肥工业大学,2017.Sun Zhi.Electrostatic spray and spinning morphology control and mechanism in antisolvent[D].Hefei:Hefei University of Technology,2017.
[4]Zheng Yuansheng,Zeng Yongchun,Dong Xuan.Simulation of jet motion during electrospinning process through coupled multiphysics method[J].Fibers and Polymers,2019,20(1):113-119.
[5]Chen Shixuan,Li Ruiquan,Li Xiaoran,et al.Electrospinning:An enabling nanotechnology platform for drug delivery and regenerative medicine[J].Advanced Drug Delivery Reviews,2018,132:188-213.
[6]罗珊珊,罗鸣,兰坤,等.MCM-41包裹Fe3O4负载乙酰丙酮铜催化二氧化碳合成苯乙烯环状碳酸酯[J].化学与生物工程,2016(4):37-40.Luo Shanshan,Luo Ming,Lan Kun,et al.Synthesis of styrene carbonate from carbon dioxide catalyzed by copper(II)acetylacetonate supported on MCM-41-Coated Fe3O4[J].Chemistry&Bioengineering,2016(4):37-40.
[7]胡淑婷.一种应用乙酰丙酮铜合成医药中间体菲化合物的方法:中国,201610217169.1[P].2016-07-06.Hu Shuting.A method for synthesizing phenanthrene compounds from copper acetylacetonate:CN,201610217169.1[P].2016-07-06.
[8]龚文正,周晶晶,阮诗伦,等.静电纺丝与静电喷雾技术共纺制备PPESK/PVDF复合锂电池隔膜[J].材料工程,2018,46(3):1-6.Gong Wenzheng,Zhou Jingjing,Ruan Shilun,et al.Electrospinning and electrostatic spraying technology to prepare PPESK/PVDF composite lithium battery separator[J].Journal of Materials Engineering,2018,46(3):1-6.
[9]岳子双.静电喷雾技术制备石墨烯复合膜电极及其在储能器件上的应用[D].南昌:南昌大学,2017.Yue Zishuang.Preparation of graphene composite membrane electrode by electrostatic spray technology and its application in energy storage devices[D].Nanchang:Nanchang University,2017.
[10]Zhou Fenglei,Gong Ronghua,Porat I.Mass production of nanofibre assemblies by electrostatic spinning[J].Polymer International,2010,58(4):331-342.
[11]Lu Xiaofeng,Wang Ce,Wei Yen.One-dimensional composite nanomaterials:Synthesis by electrospinning and their applications[J].Small,2009,5(21):2 349-2 370.
[12]Lee H,Nishino M,Sohn D,et al.Control of the morphology of cellulose acetate nanofibers via electrospinning[J].Cellulose,2018,25(5):2 829-2 837.
[13]Shi Huifa,Niu Shuzhang,Lyu Wei,et al.Easy fabrication of flexible and multilayer nanocarbon-based cathodes with a high areal sulfur loading by electrostatic spraying for lithium-sulfur batteries[J].Carbon,2018,138:18-25.
[14]Huang Liya,Yu Dengguang,White C B,et al.Sustained release of ethyl cellulose micro-particulate drug delivery systems prepared using electrospraying[J].J Mater Sci,2012,47:1 372-1 377.
[15]Levitt A S,Vallett R,Dion G,et al.Effect of electrospinning processing variables on polyacrylonitrile nanoyarns[J].Journal of Applied Polymer Science,2018,135(25):doi:10.1002/app.46404.
[16]姚苌,刘训伟,孙智,等.抗溶剂中静电喷雾法制备聚己内酯微颗粒[J].工程塑料应用,2018,46(11):30-34.Yao Chang,Liu Xunwei,Sun Zhi,et al.Preparation of PCL microparticles from electrospraying in anti-solvent[J].Engineering Plastics Application,2018,46(11):30-34.