Effect of Molecular Structure on the Gas Permeability of Cellulose Aliphatate Esters

Jing Chen; Jin-ming Zhang; Ye Feng; Jia-song He; Jun Zhang

doi:10.1007/s10118-014-1384-2

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Effect of Molecular Structure on the Gas Permeability of Cellulose Aliphatate Esters

Updated：2021-06-21

- Effect of Molecular Structure on the Gas Permeability of Cellulose Aliphatate Esters
- Chinese Journal of Polymer Science Vol. 32, Issue 1, Pages: 1-8(2014)
- Affiliations：
  
  Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Engineering Plastics, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- Author bio：
  
  **Jun Zhang (张军), E-mail: jzhang@iccas.ac.cn
- Funds：
- DOI：10.1007/s10118-014-1384-2
  CLC：
- Received：06 May 2013，
  
  Revised：2013-05-16，
  
  Accepted：17 May 2013，
  
  Published：2014-01
- Accepted：
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Jing Chen, Jin-ming Zhang, Ye Feng, et al. Effect of Molecular Structure on the Gas Permeability of Cellulose Aliphatate Esters[J]. Chinese Journal of Polymer Science, 2014, 32(1): 1-8.
DOI：

Jing Chen, Jin-ming Zhang, Ye Feng, et al. Effect of Molecular Structure on the Gas Permeability of Cellulose Aliphatate Esters[J]. Chinese Journal of Polymer Science, 2014, 32(1): 1-8. DOI： 10.1007/s10118-014-1384-2.

摘要

Abstract

In this work

four kinds of cellulose aliphatate esters

cellulose acetate (CA)

cellulose propionate (CP)

cellulose butyrate (CB) and cellulose acetate butyrate (CAB) are synthesized by the homogeneous acylation reactions in cellulose/AmimCl solutions. These cellulose aliphatate esters are used to prepare gas separation membranes and the effects of molecular structure

such as substituent type

degree of substitution (DS) and distribution of substituents

on the gas permeability are studied. For CAs

as the DS increases

their gas permeabilities for all five gases (O

CO and CO

) increase

and the ideal permselectivity significantly increases first and then slightly decreases. At similar DS value

the homogenously synthesized CA (distribution order of acetate substituent: C6

C2) is superior to the heterogeneously synthesized CA (distribution order of acetate substituent: C3

C6) in gas separation. With the increase of chain length of aliphatate substituents from acetate to propionate

and to butyrate

the gas permeability of cellulose aliphatate esters gradually increases. The cellulose mixed ester CAB with short acetate groups and relatively long butyrate groups exhibits higher gas permeability or better permselectivity than individual CA or CB

via

the alteration of the DS of two substituents.

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Related Institution

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