Properties Characterization of Chemically Modified Hemp Hurds
The effect of chemical treatment of hemp hurds slices in three solutions (EDTA (Ethylenediaminetetraacetic acid), NaOH and Ca(OH)2) on the properties of natural material was discussed in this paper. Changes in the morphology, chemical composition and structure as well as thermal stability of hemp hu...
Main Authors: | , , , , , , , |
---|---|
Format: | Article |
Language: | English |
Published: |
MDPI AG
2014-12-01
|
Series: | Materials |
Subjects: | |
Online Access: | http://www.mdpi.com/1996-1944/7/12/8131 |
id |
doaj-db756d1a3877472ba02ea33233b18494 |
---|---|
record_format |
Article |
spelling |
doaj-db756d1a3877472ba02ea33233b184942020-11-24T22:40:46ZengMDPI AGMaterials1996-19442014-12-017128131815010.3390/ma7128131ma7128131Properties Characterization of Chemically Modified Hemp HurdsNadezda Stevulova0Julia Cigasova1Adriana Estokova2Eva Terpakova3Anton Geffert4Frantisek Kacik5Eva Singovszka6Marian Holub7Department of Material Engineering, Institute of Environmental Engineering, Faculty of Civil Engineering, Technical University of Kosice, Vysokoskolska 4, Kosice 042 00, SlovakiaDepartment of Material Engineering, Institute of Environmental Engineering, Faculty of Civil Engineering, Technical University of Kosice, Vysokoskolska 4, Kosice 042 00, SlovakiaDepartment of Material Engineering, Institute of Environmental Engineering, Faculty of Civil Engineering, Technical University of Kosice, Vysokoskolska 4, Kosice 042 00, SlovakiaDepartment of Material Engineering, Institute of Environmental Engineering, Faculty of Civil Engineering, Technical University of Kosice, Vysokoskolska 4, Kosice 042 00, SlovakiaDepartment of Chemistry and Chemical Technologies, Faculty of Wood Sciences and Technology, Technical University in Zvolen, T. G. Masaryka 2117/24, Zvolen 960 53; SlovakiaDepartment of Chemistry and Chemical Technologies, Faculty of Wood Sciences and Technology, Technical University in Zvolen, T. G. Masaryka 2117/24, Zvolen 960 53; SlovakiaDepartment of Material Engineering, Institute of Environmental Engineering, Faculty of Civil Engineering, Technical University of Kosice, Vysokoskolska 4, Kosice 042 00, SlovakiaDepartment of Material Engineering, Institute of Environmental Engineering, Faculty of Civil Engineering, Technical University of Kosice, Vysokoskolska 4, Kosice 042 00, SlovakiaThe effect of chemical treatment of hemp hurds slices in three solutions (EDTA (Ethylenediaminetetraacetic acid), NaOH and Ca(OH)2) on the properties of natural material was discussed in this paper. Changes in the morphology, chemical composition and structure as well as thermal stability of hemp hurds before and after their modification were investigated by using FTIR (Fourier transform infrared spectroscopy), XRD (X-ray powder diffraction analysis) and TG (thermogravimetry)/DSC (differential scanning calorimetry). Size exclusion chromatography (SEC) measurements were used for determination of degree of cellulose polymerization of hemp hurd samples. Chemical modification is related to the partial removal of non-cellulosic components of lignin, hemicellulose and pectin as well as waxes from the surface of hemp hurd slices. Another effect of the chemical treatment applied is connected with increasing the crystallinity index of cellulose determined by FTIR and XRD methods. Decrease in degree of cellulose polymerization and polydispersity index in chemically modified hemp hurds compared to the original sample was observed. Increase in thermal stability of treated hemp hurd was found. The most significant changes were observed in alkaline treated hemp hurds by NaOH.http://www.mdpi.com/1996-1944/7/12/8131hemp hurdschemical modificationFTIRXRDTG/DSCSEC |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Nadezda Stevulova Julia Cigasova Adriana Estokova Eva Terpakova Anton Geffert Frantisek Kacik Eva Singovszka Marian Holub |
spellingShingle |
Nadezda Stevulova Julia Cigasova Adriana Estokova Eva Terpakova Anton Geffert Frantisek Kacik Eva Singovszka Marian Holub Properties Characterization of Chemically Modified Hemp Hurds Materials hemp hurds chemical modification FTIR XRD TG/DSC SEC |
author_facet |
Nadezda Stevulova Julia Cigasova Adriana Estokova Eva Terpakova Anton Geffert Frantisek Kacik Eva Singovszka Marian Holub |
author_sort |
Nadezda Stevulova |
title |
Properties Characterization of Chemically Modified Hemp Hurds |
title_short |
Properties Characterization of Chemically Modified Hemp Hurds |
title_full |
Properties Characterization of Chemically Modified Hemp Hurds |
title_fullStr |
Properties Characterization of Chemically Modified Hemp Hurds |
title_full_unstemmed |
Properties Characterization of Chemically Modified Hemp Hurds |
title_sort |
properties characterization of chemically modified hemp hurds |
publisher |
MDPI AG |
series |
Materials |
issn |
1996-1944 |
publishDate |
2014-12-01 |
description |
The effect of chemical treatment of hemp hurds slices in three solutions (EDTA (Ethylenediaminetetraacetic acid), NaOH and Ca(OH)2) on the properties of natural material was discussed in this paper. Changes in the morphology, chemical composition and structure as well as thermal stability of hemp hurds before and after their modification were investigated by using FTIR (Fourier transform infrared spectroscopy), XRD (X-ray powder diffraction analysis) and TG (thermogravimetry)/DSC (differential scanning calorimetry). Size exclusion chromatography (SEC) measurements were used for determination of degree of cellulose polymerization of hemp hurd samples. Chemical modification is related to the partial removal of non-cellulosic components of lignin, hemicellulose and pectin as well as waxes from the surface of hemp hurd slices. Another effect of the chemical treatment applied is connected with increasing the crystallinity index of cellulose determined by FTIR and XRD methods. Decrease in degree of cellulose polymerization and polydispersity index in chemically modified hemp hurds compared to the original sample was observed. Increase in thermal stability of treated hemp hurd was found. The most significant changes were observed in alkaline treated hemp hurds by NaOH. |
topic |
hemp hurds chemical modification FTIR XRD TG/DSC SEC |
url |
http://www.mdpi.com/1996-1944/7/12/8131 |
work_keys_str_mv |
AT nadezdastevulova propertiescharacterizationofchemicallymodifiedhemphurds AT juliacigasova propertiescharacterizationofchemicallymodifiedhemphurds AT adrianaestokova propertiescharacterizationofchemicallymodifiedhemphurds AT evaterpakova propertiescharacterizationofchemicallymodifiedhemphurds AT antongeffert propertiescharacterizationofchemicallymodifiedhemphurds AT frantisekkacik propertiescharacterizationofchemicallymodifiedhemphurds AT evasingovszka propertiescharacterizationofchemicallymodifiedhemphurds AT marianholub propertiescharacterizationofchemicallymodifiedhemphurds |
_version_ |
1725703363851452416 |