# High Hexane Sorption Capacity of Loosely Crosslinked PDMS Rubbers at Low Temperatures: Macromolecular and Physicochemical Elucidation for VOC Recovery

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## File

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## Id

a01299bd-0b66-4f57-afd8-a30bb3e97ba1

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2023-05-10T04:18:14.060527Z

## Updated at

2024-11-14T07:30:33.149410Z

## Published at

2024-11-14T07:30:33.265184Z

## Doi



## First published url

https://doi.org/10.1016/j.seppur.2022.122634

## Date published

2022-11-13

## Recorded date published

2023-2

## Resource type

journal_article

## Manuscript type

accepted_manuscript

## Collection



## Title

- title: 'High Hexane Sorption Capacity of Loosely Crosslinked PDMS Rubbers at Low
    Temperatures: Macromolecular and Physicochemical Elucidation for VOC Recovery'
  title_type: original
  lang: en

## Description

- description: A series of soft polydimethylsiloxane (PDMS) rubbers was obtained by
    diluting reaction mixtures of a PDMS macromer and a crosslinker with an organic
    solvent. The degree of swelling of the softest rubber was 600 wt% when immersed
    in pure hexane at room temperature. From the Flory–Huggins equations, the free
    energy change for hexane sorption per 1 g rubber was calculated to be −7.4 J g−1
    and the entropy contribution of the polymer chains was 1.6 J g−1 larger than that
    of the conventional PDMS rubber. The loosely crosslinked PDMS rubber could sorb
    776 mg g−1 of hexane at 298 K and 606 mg g−1 at 195 K. The latter value was 4.4
    times larger than that of the conventional PDMS rubber. At a low pressure of 23
    Pa, the PDMS rubber sorbed a 3500-fold greater amount of hexane at 195 K, as compared
    with the value at 298 K. This high sorption amount is because the expansion energy
    of such soft PDMS rubber is small. The sorption heat of the loosely crosslinked
    PDMS rubber was 30.3 kJ mol−1 when calculated from the Clausius–Clapeyron equation.
    This value is substantially smaller than that of commercial activated carbon (75
    kJ mol−1). Unlike activated carbon, PDMS rubber is insensitive to water and selectively
    sorbs VOCs even under a saturated humidity. Because of the large swelling potential
    and small sorption/desorption heat, the loosely crosslinked PDMS rubber will be
    an indispensable sorbent for the recovery of flammable gasses such as alkane and
    iso-alkane VOCs in the chemical and oil and gas industries.
  description_type: abstract
  lang: eng

## Creator

- name: M. Inoue
  role: author
  orcid: https://orcid.org/0000-0003-3098-5448
  organization: National Institute for Materials Science
  ror: https://ror.org/026v1ze26
- name: E. Ismail
  role: author
  orcid: https://orcid.org/0000-0003-1031-6562
  organization: National Institute for Materials Science
  ror: https://ror.org/026v1ze26
- name: S. Samitsu
  role: author
  orcid: https://orcid.org/0000-0002-4139-1656
  organization: National Institute for Materials Science
  ror: https://ror.org/026v1ze26
- name: H. Kanoh
  role: author
- name: I. Ichinose
  role: author
  orcid: https://orcid.org/0000-0002-2236-0942
  organization: National Institute for Materials Science
  ror: https://ror.org/026v1ze26

## Contact agent



## Publisher

organization: Elsevier BV

## Managing organization



## Keyword

- subject: soft PDMS
  schema: not_defined
- subject: elastic modulus
  schema: not_defined
- subject: hexane gas sorption
  schema: not_defined
- subject: swelling
  schema: not_defined
- subject: low temperature
  schema: not_defined

## Rights

- identifier: https://creativecommons.org/licenses/by/4.0/

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo

start_date: 2022-11-13
end_date: 2024-11-14

## Journal

- title: SEPARATION AND PURIFICATION TECHNOLOGY
  issn: '13835866'
  volume: '306'
  issue: Part A
  start_page: 122634
  end_page: 122634

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## Chemical composition



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## Fileset

- id: 6819f287-e1ed-48e9-a11b-246ae1ce399e
  filename: High Hexane Sorption Capacity of Loosely Crosslinked PDMS Rubbers at Low
    Temperatures Macromolecular and Physicochemical Elucidation for VOC Recovery.pdf
  content_type: application/pdf
  size: 1691515
  md5: a331b8a4ac6b59129e906fa6227a2970

## Thumbnail

fileset_id: 6819f287-e1ed-48e9-a11b-246ae1ce399e
filename: High Hexane Sorption Capacity of Loosely Crosslinked PDMS Rubbers at Low
  Temperatures Macromolecular and Physicochemical Elucidation for VOC Recovery.pdf