将与质量传递有关的表面更新模型(surface renewal model)与微观涡流模型(eddy cellmodel)引入到纳米材料的制备中,并通过自制两级反应器成功制备出粒径较小、结晶度较高的MgAl-CO3 LDHs纳米颗粒.采用XRD、TEM、SEM、AFM、激光粒度仪对纳米颗粒进行表征,结果表明:充气基本不影响MgAl-CO3 LDHs纳米颗粒的晶体结构,但对颗粒尺寸和均匀性影响较大且能明显提高颗粒形貌的均一性;搅拌速度从300rpm增加到600、900和1200rpm的过程中,粒径逐渐变小,粒径分布逐渐变窄;气流流量由lkPa依次增大至6 kPa,平均粒径大小逐渐减小,但减小趋势逐渐变缓;并对相关反应机理进行了探讨.
参考文献
| [1] | Carl C.Koch.NANOSTRUCTURED MATERIALS Processing,Properties and PotentialApplications[M].New York:Noyes Publications/William Andrew Publishing,2002:3. |
| [2] | Gerardin C;Kostadinova D;Coq B;Tichit D .LDH nanocomposites with different guest entities as precursors of supported Ni catalysts[J].Chemistry of Materials: A Publication of the American Chemistry Society,2008(6):2086-2094. |
| [3] | Paulo C. Pavan;Gilmar de A. Gomes;Joao B. Valim .Adsorption of sodium dodecyl sulfate on layered double hydroxides[J].Microporous and Mesoporous Materials,1998(4/6):659-665. |
| [4] | 彭霞辉,黄可龙,焦飞鹏,赵学辉,于金刚.L-（-）-苹果酸柱撑水滑石的合成及结构表征[J].材料科学与工程学报,2006(02):175-178. |
| [5] | Costache M C;Wang D;Heidecker M J et al.The thermal degradation of PMMA nanocomposites with montmorillonite,layered double hydroxides and carbon nanotubes[J].Advances in Polymer Technology,2006,17:272-280. |
| [6] | 金凤,张秋禹,徐庶,周桓,陆树新,张和鹏.多孔磁性复合微球的制备及其功能化研究进展[J].材料科学与工程学报,2009(02):297-301. |
| [7] | Gago S;Costa T;de Melo JS;Goncalves IS;Pillinger M .Preparation and photophysical characterisation of Zn-Allayered double hydroxides intercalated by anionic pyrene derivatives[J].Journal of Materials Chemistry: An Interdisciplinary Journal dealing with Synthesis, Structures, Properties and Applications of Materials, Particulary Those Associated with Advanced Technology,2008(8):894-904. |
| [8] | 赵建海,李毓,高富,刘连生.撞击流制备高纯纳米氢氧化镁技术研究[J].无机盐工业,2007(08):22-24. |
| [9] | Tai CY;Tai CT;Chang MH;Liu HS .Synthesis of magnesium hydroxide and oxide nanoparticles using a spinning disk reactor[J].Industrial & Engineering Chemistry Research,2007(17):5536-5541. |
| [10] | 李少伟,陈桂光,骆广生.膜分散小型反应器制备ZrO2纳米颗粒的实验研究[J].过程工程学报,2004(z1):408-412. |
| [11] | 杨第伦;李宗葆 .多用途气泡液膜反应器[P].CN Patent,1833769,2006-2-28. |
| [12] | DUAN xue;JIAO Qingze;Li feng et al.Full back-mixing liquid membrane reactor and application of preparation of ultrafine anion layered materials[P].CN,1358691,2000. |
| [13] | Danckwerts P V .Significance of Liquid-Film Coefficients in Gas Absorption[J].Industrial and Engineering Chemistry,1951,43(06):1460-1467. |
| [14] | Lamont J C;Scott D S .An eddy cell model of mass transfer into surface of a turbulent liquid[J].A1ChE Journal,1970,16(04):513-519. |
| [15] | Yue Jun Liu;Yong Sheng Que;Jun Yang .Kilogram-scale synthesis of Mg-Al-CO3 LDHs nanosheets using a new two-stage reactor[J].Powder Technology: An International Journal on the Science and Technology of Wet and Dry Particulate Systems,2010(3):301-305. |
| [16] | Shoji Taniguchi;Seiji Kawaguchi;Atsushi Kikuchi .Fluid flow and gas-liquid mass transfer in gas-injected vessels[J].Applied mathematical modelling,2002(2):249-262. |
| [17] | SHI Ling,Li Dianqing,LI Sufeng,WANG Jianrong,Evans D.G,DUAN Xue.Structure, flame retarding and smoke suppressing properties of Zn-Mg-Al-CO3 layered double hydroxides[J].科学通报（英文版）,2005(11):1101-1104. |
| [18] | Zhao Y.;Li F.;Zhang R.;Evans DG.;Duan X. .Preparation of layered double-hydroxide nanomaterials with a uniform crystallite size using a new method involving separate nucleation and aging steps[J].Chemistry of Materials,2002(10):4286-4291. |
| [19] | 任庆利,刘斌,陈寿田.热液环境下氢氧化镁结晶形态机理研究[J].稀有金属材料与工程,2004(01):47-50. |
| [20] | Iliseev A A;Lukashin A V;Vertegel A A et al.Study of crystal-lization of Mg-Al double hydroxides[J].Doklady Chemistry,2002,387(4-6):339-343. |
| [21] | Ostwald W.Lehrbuch der Allgemeinen Chemie[M].Leipzig,Germany,1896 |
| [22] | L. M. Cafiero;G. Baffi;A. Chianese;R. J. J. Jachuck .Process Intensification: Precipitation of Barium Sulfate Using a Spinning Disk Reactor[J].Industrial & Engineering Chemistry Research,2002(21):5240-5246. |
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