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Open AccessFeature PaperArticle
Membranes 2017, 7(2), 27; doi:10.3390/membranes7020027

Fabrication of Defect-Free Cellulose Acetate Hollow Fibers by Optimization of Spinning Parameters

Department of Chemical Engineering, Faculty of Natural Sciences, Norwegian University of Science and Technology, NO-7491 Trondheim, Norway
Academic Editor: Klaus Rätzke
Received: 15 April 2017 / Revised: 29 May 2017 / Accepted: 31 May 2017 / Published: 5 June 2017
(This article belongs to the Special Issue Seven Years of Membranes: Feature Paper 2017)
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Abstract

Spinning of cellulose acetate (CA) with the additive polyvinylpyrrolidone (PVP) in N-methyl-2-pyrrolidone (NMP) solvent under different conditions was investigated. The spinning parameters of air gap, bore fluid composition, flow rate of bore fluid, and quench bath temperature were optimized based on the orthogonal experiment design (OED) method and multivariate analysis. FTIR and scanning electron microscopy were used to characterize the membrane structure and morphology. Based on the conjoint analysis in Statistical Product and Service Solutions (SPSS) software, the importance of these parameters was identified as: air gap > bore fluid composition > flow rate of bore fluid > quench bath temperature. The optimal spinning condition with the bore fluid (water + NMP (85%)), air gap (25 mm), flow rate of bore fluid (40% of dope rate), and temperature of quench bath (50 °C) was identified to make high PVP content, symmetric cross-section and highly cross-linked CA hollow fibers. The results can be used to guide the spinning of defect-free CA hollow fiber membranes with desired structures and properties as carbon membrane precursors. View Full-Text
Keywords: spinning; cellulose acetate; hollow fiber membrane; orthogonal experiment design; conjoint analysis spinning; cellulose acetate; hollow fiber membrane; orthogonal experiment design; conjoint analysis
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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He, X. Fabrication of Defect-Free Cellulose Acetate Hollow Fibers by Optimization of Spinning Parameters. Membranes 2017, 7, 27.

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