在Strathmann等人[1]提出的诱导期概念的基础上，对PES制膜体系的亚层形成机理进行研究，进一步阐明：成膜过程中由于诱导期的影响使后生成的核比先生成的核的生长滞后，从而导致核的生长存在“先核生长优势”，并采用两步分相[2～4]、控速凝胶等实验方法对PES制膜体系成膜过程中的凝胶行为进行研究，从非溶剂进入膜液的角度，借助提出的先核生长优势概念对成膜结构做出解释.
Based on the concept of incubation time proposed by Sthrathmannetc, a model of the effect of “predominance on the growth of preformed nucleus” was proposed considering the retarded growth of the subsequent nuclei compared with the preformed ones. The methods of two-step phase separation and speed-controlled gelation were applied to prepare the membranes. From the point of the nonsolvent inflow to polymer solution and by the proposed effect of predominance on the growth of preformed nucleus, the membrane structures were explained.
参考文献
| [1] | Kimmerle Klaus;Strathmann Heiner.Analysis of the structure-determining process of phase inversion membranes[J].Desalination,1990:283-302. |
| [2] | Yong T H;Chen L W.A diffusion-controlled model for wet-casting membrane formation[J].Journal of Membrane Science,1991:169-181. |
| [3] | Yong T H;Chen L W.Roles of bimolecular interaction and relative diffusion rate in membrane structure control[J].Journal of Membrane Science,1993:153-166. |
| [4] | Tai-Horng Young;Leo-Wang Chen .Pore formation mechanism of membranes from phase inversion process[J].Desalination: The International Journal on the Science and Technology of Desalting and Water Purification,1995(3):233-247. |
| [5] | Kesting R E.The four tiers of structure in integrally skinned phase inversion membranes and their relevance to the various separation regimes[J].Journal OF APPLIED POLYMER SCIENCE,1990:2739-2752. |
| [6] | Smolders C A;Reuvers A J;Boom R M.Microstructures in phase-inversion membranes.Ⅰ.Formation of macrovoids[J].Journal of Membrane Science,1992:259-275. |
| [7] | Strathmann H;Kock K;Amar P.The formation mechanism of asymmetric membranes[J].Desalination,1975:179-203. |
| [8] | Broens L;Koenhen D M;Smolders C A.On the mechanism of formation of asymmetric ultro-and hyper-filtration membrane[J].Desalination,1977:205-219. |
| [9] | Wijmans J G;Kant J;Mulder M H V.Phase separation phenomena in solutions of polysulfone in mixtures of solvent and a nonsolvent:Relation with membrane formation[J].Polymer,1985:1539-1545. |
| [10] | Radovanovic Philip;Thiel Stephen W;Hwang S T.Formation of asymmetric polysulfone membrane by immersion precipitation.Ⅱ.The effects of casting solution and gelation bath compositions on membrane structure and skin formation[J].Journal of Membrane Science,1992:231-246. |
| [11] | Yong T H;Chen L W.A two step mechanism of diffusion-controlled ethylene vinyl alcohol membrane formation[J].Journal of Membrane Science,1991:69-81. |
| [12] | Reuvers A J;Van den Berg J W A;Smolders C A.Formation of membranes by means of immersion precipitation.I.A model to describe mass transfer during immersion precipitation[J].Journal of Membrane Science,1987:45-65. |
| [13] | Reuvers A J;Smolders C A.Formation of membranes by means of immersion precipitation.Ⅱ.The mechanism of formation of membranes prepared from the system cellulose acetate-acetone-water[J].Journal of Membrane Science,1987:67-86. |
| [14] | Mulder M;Hendrikman J O;Wijmans J G.A rationale for the preparation of asymmetric pervaporation membrane[J].Journal OF APPLIED POLYMER SCIENCE,1985:2805-2820. |
| [15] | McKelvey Scott A;Koros William J.Phase separation,vitrification,and the manifestation of macorvoids in polymer asymmetric membranes[J].Journal of Membrane Science,1996:29-39. |
| [16] | Li SG.;Smolders CA.;Strathmann H.;Vandenboomgaard T. .PHYSICAL GELATION OF AMORPHOUS POLYMERS IN A MIXTURE OF SOLVENT AND NONSOLVENT[J].Macromolecules,1996(6):2053-2059. |
| [17] | Arnauts J;Berghmann H.Amorphous thermoreversible gels of atactic polystyrene[J].Polymer Communications,1987:66-68. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%