Fibre Stress-Strain Response of High-Temperature Chemi-Thermomechanical Pulp Treated with Switchable Ionic Liquids
The removal of lignin from a high-temperature chemi-thermomechanical pulp (HT-CTMP) using a switchable ionic liquid prepared from an organic superbase (1,8-diazabicyclo-[5.4.0]-undec-7-ene (DBU)), monoethanol amine (MEA), and SO2 was investigated. The objective was to measure the fibre properties be...
Main Authors: | , , , , , |
---|---|
Format: | Article |
Language: | English |
Published: |
North Carolina State University
2016-08-01
|
Series: | BioResources |
Subjects: | |
Online Access: | http://ojs.cnr.ncsu.edu/index.php/BioRes/article/view/BioRes_11_4_8570_Duan_Fibre_Stress_Strain_Response_Pulp_Liquids |
id |
doaj-46d637d0c13d472d8c306375c10fe13a |
---|---|
record_format |
Article |
spelling |
doaj-46d637d0c13d472d8c306375c10fe13a2020-11-25T02:30:52ZengNorth Carolina State UniversityBioResources1930-21261930-21262016-08-011148570858810.15376/biores.11.4.8570-8588Fibre Stress-Strain Response of High-Temperature Chemi-Thermomechanical Pulp Treated with Switchable Ionic LiquidsRan Duan0Bo S. Westerlind1Magnus Norgren2Ikenna Anugwom3Pasi Virtanen4Jyri-Pekka Mikkola5Mid Sweden University; SwedenMid Sweden University; SwedenMid Sweden University; SwedenUmeå University, Åbo Akademi University; FinlandUmeå University; FinlandUmeå University, Åbo Akademi University; FinlandThe removal of lignin from a high-temperature chemi-thermomechanical pulp (HT-CTMP) using a switchable ionic liquid prepared from an organic superbase (1,8-diazabicyclo-[5.4.0]-undec-7-ene (DBU)), monoethanol amine (MEA), and SO2 was investigated. The objective was to measure the fibre properties before and after removal of the lignin to analyse the contributions from lignin in the HT-CTMP fibre to the tensile properties. It was found that the fibre displacement at break - measured in zero span, which is related to fibre strain at break - was not influenced by the lignin removal in this ionic liquid system when tested dry. There was a small increase in displacement at break and a reduction in tensile strength at zero span when tested after rewetting. At short span, the displacement at break decreased slightly when lignin was removed, while tensile strength was almost unaffected when tested dry. Under rewetted conditions, the displacement at break increased and tensile strength decreased after lignin removal. Nevertheless, no dramatic differences in the pulp properties could be observed. Under the experimental conditions, treatment with the ionic liquid reduced the lignin content from 37.4 to 15.5 wt%.http://ojs.cnr.ncsu.edu/index.php/BioRes/article/view/BioRes_11_4_8570_Duan_Fibre_Stress_Strain_Response_Pulp_LiquidsIonic liquidSpruceCelluloseShort spanZero spanDelignification |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Ran Duan Bo S. Westerlind Magnus Norgren Ikenna Anugwom Pasi Virtanen Jyri-Pekka Mikkola |
spellingShingle |
Ran Duan Bo S. Westerlind Magnus Norgren Ikenna Anugwom Pasi Virtanen Jyri-Pekka Mikkola Fibre Stress-Strain Response of High-Temperature Chemi-Thermomechanical Pulp Treated with Switchable Ionic Liquids BioResources Ionic liquid Spruce Cellulose Short span Zero span Delignification |
author_facet |
Ran Duan Bo S. Westerlind Magnus Norgren Ikenna Anugwom Pasi Virtanen Jyri-Pekka Mikkola |
author_sort |
Ran Duan |
title |
Fibre Stress-Strain Response of High-Temperature Chemi-Thermomechanical Pulp Treated with Switchable Ionic Liquids |
title_short |
Fibre Stress-Strain Response of High-Temperature Chemi-Thermomechanical Pulp Treated with Switchable Ionic Liquids |
title_full |
Fibre Stress-Strain Response of High-Temperature Chemi-Thermomechanical Pulp Treated with Switchable Ionic Liquids |
title_fullStr |
Fibre Stress-Strain Response of High-Temperature Chemi-Thermomechanical Pulp Treated with Switchable Ionic Liquids |
title_full_unstemmed |
Fibre Stress-Strain Response of High-Temperature Chemi-Thermomechanical Pulp Treated with Switchable Ionic Liquids |
title_sort |
fibre stress-strain response of high-temperature chemi-thermomechanical pulp treated with switchable ionic liquids |
publisher |
North Carolina State University |
series |
BioResources |
issn |
1930-2126 1930-2126 |
publishDate |
2016-08-01 |
description |
The removal of lignin from a high-temperature chemi-thermomechanical pulp (HT-CTMP) using a switchable ionic liquid prepared from an organic superbase (1,8-diazabicyclo-[5.4.0]-undec-7-ene (DBU)), monoethanol amine (MEA), and SO2 was investigated. The objective was to measure the fibre properties before and after removal of the lignin to analyse the contributions from lignin in the HT-CTMP fibre to the tensile properties. It was found that the fibre displacement at break - measured in zero span, which is related to fibre strain at break - was not influenced by the lignin removal in this ionic liquid system when tested dry. There was a small increase in displacement at break and a reduction in tensile strength at zero span when tested after rewetting. At short span, the displacement at break decreased slightly when lignin was removed, while tensile strength was almost unaffected when tested dry. Under rewetted conditions, the displacement at break increased and tensile strength decreased after lignin removal. Nevertheless, no dramatic differences in the pulp properties could be observed. Under the experimental conditions, treatment with the ionic liquid reduced the lignin content from 37.4 to 15.5 wt%. |
topic |
Ionic liquid Spruce Cellulose Short span Zero span Delignification |
url |
http://ojs.cnr.ncsu.edu/index.php/BioRes/article/view/BioRes_11_4_8570_Duan_Fibre_Stress_Strain_Response_Pulp_Liquids |
work_keys_str_mv |
AT randuan fibrestressstrainresponseofhightemperaturechemithermomechanicalpulptreatedwithswitchableionicliquids AT boswesterlind fibrestressstrainresponseofhightemperaturechemithermomechanicalpulptreatedwithswitchableionicliquids AT magnusnorgren fibrestressstrainresponseofhightemperaturechemithermomechanicalpulptreatedwithswitchableionicliquids AT ikennaanugwom fibrestressstrainresponseofhightemperaturechemithermomechanicalpulptreatedwithswitchableionicliquids AT pasivirtanen fibrestressstrainresponseofhightemperaturechemithermomechanicalpulptreatedwithswitchableionicliquids AT jyripekkamikkola fibrestressstrainresponseofhightemperaturechemithermomechanicalpulptreatedwithswitchableionicliquids |
_version_ |
1724827296386252800 |