不同干燥方式对聚醚砜酮基炭膜的影响

doi:10.3724/SP.J.1077.2011.00165

无机材料学报 ›› 2011, Vol. 26 ›› Issue (2): 165-159.DOI: 10.3724/SP.J.1077.2011.00165 CSTR: 32189.14.SP.J.1077.2011.00165

不同干燥方式对聚醚砜酮基炭膜的影响

庞婧¹, 王同华¹, 李琳¹, 祁文博¹, 曹义鸣²

1. 大连理工大学化工学院精细化工国家重点实验室, 炭素研究室, 大连116012; 2. 中国科学院大连化学物理研究所, 大连 116023

收稿日期:2010-04-14 修回日期:2010-07-01 出版日期:2011-02-20 网络出版日期:2011-01-21
作者简介:庞婧(1985-), 女, 硕士研究生. E-mail: lypj0929@163.com
基金资助:
国家自然科学基金(20776024,20976021,20836006);国家863项目(2009AA03Z215)

Effect of Different Drying Methods on PPESK CarbonMembrane

PANG Jing¹, WANG Tong-Hua¹, LI Lin¹,QI Wen-Bo¹, CAO Yi-Ming²

1. Carbon Material Research Lab, State Key Lab of Fine Chemicals, College of Chemical Engineering, Dalian University of Technology, Dalian 116012, China; 2. Dalian Instituteof Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China

Received:2010-04-14 Revised:2010-07-01 Published:2011-02-20 Online:2011-01-21
Supported by:
National Nature Science Foundation of China(20776024 , 20976021 , 20836006); 863 Program(2009AA03Z215)

摘要/Abstract

摘要： 以PPESK为前驱体, CHCl₃为溶剂, 分别采用冷冻干燥法和冷藏干燥法制备气体分离炭膜, 借助于红外光谱、热重分析、X射线衍射和气体渗透等测试手段, 研究探讨了干燥方式对聚醚砜酮(PPESK)基炭膜的化学结构、炭微结构及气体分离性能的影响. 结果表明, 干燥方式对炭膜结构性能的影响主要体现在促使前驱体在干燥过程中形成具有不同化学结构的聚合物膜, 使它们在以后的预氧化和低温热解炭化过程中表现出不同的演变规律与冷藏干燥相比, 冷冻干燥得到的聚合物膜在预氧化和炭化过程中分解反应程度较弱, 但芳香缩合反应却很深刻, 使形成的炭膜微结构尺寸较小, 气体分离性能较高, 并具有良好的表观柔韧性. 所以, 采用CHCl₃为溶剂制备PPESK炭膜, 冷冻干燥将是首选干燥方式.

关键词: 聚醚砜酮, 炭膜, 干燥方式, 气体分离

Abstract: The carbon membranesderived from the PPESK precursor in CHCl₃solvent for gas separation wereprepared with freezing and refrigeration drying methods. The influences ofdrying methods on the structure and gas separation performance of PPESK carbonmembranes were investigated. FTIR, TG, XRD and gas permeation tests were used to characterize thechange of chemical and carbon structure and gas separation properties of carbonmembranes prepared with different drying methods. The result indicated that theeffects of drying methods on the structure and performance of PPESK carbonmembranes are to promote the precursor to form a polymeric membrane with thedifferent chemical structure during the drying and make the chemical structureof derived polymeric membranes change in different ways during the laterpreoxidation and carbonization. Compared with refrigeration drying, thefreezing drying weakened decomposition reaction and promoted condensationreaction during preoxidation and carbonization. As a result, the frozenmembrane exhibited a better gas separation performance with a good flexilitydue to its dense microstructure. The freezing drying was the optimum way toprepare PPESK carbon membranes using CHCl₃ as solvent.

Key words: poly(phthalazinone ether sulfone ketone), carbon membrane, dryingmethods, gas separation

中图分类号:

庞婧, 王同华, 李琳, 祁文博, 曹义鸣. 不同干燥方式对聚醚砜酮基炭膜的影响[J]. 无机材料学报, 2011, 26(2): 165-159.

PANG Jing, WANG Tong-Hua, LI Lin,QI Wen-Bo, CAO Yi-Ming. Effect of Different Drying Methods on PPESK CarbonMembrane[J]. Journal of Inorganic Materials, 2011, 26(2): 165-159.

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不同干燥方式对聚醚砜酮基炭膜的影响

Effect of Different Drying Methods on PPESK CarbonMembrane

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