Gas permeability and selectivity of cellulose nanocrystals films (layers) deposited by spin coating
Document identifier: oai:DiVA.org:ltu-7580
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10.1016/j.carbpol.2014.06.036Keyword: Engineering and Technology,
Industrial Biotechnology,
Bio Materials,
Teknik och teknologier,
Industriell bioteknik,
Biomaterial,
Trä och bionanokompositer,
Wood and BionanocompositesPublication year: 2014Relevant Sustainable Development Goals (SDGs):
The SDG label(s) above have been assigned by OSDG.aiAbstract: Cellulose nanocrystals (CNC) were extracted from a cellulose residue using two different acid hydrolysis procedures. CNC extracted with sulfuric acid (CNCS) showed higher surface charge (339 μmol/g) compared with crystals extracted with hydrochloric acid (CNCHCl). Spin-coated films with two different configurations were prepared; the first with alternate layers of poly(allylamine hydrochloride) (PAHCl) and CNC, and the second with a single layer of PAHCl coated with multilayers of CNC. Film characteristics such as roughness, thickness, contact angle, orientation, gas permeability and gas selectivity were studied. Optical microscopy showed more homogeneous films of CNCS compared to CNCHCl. The surface charge of the crystals impacted the films’ hydrophobicity, being highest for 25 alternate layers of PAHCl and CNCHCl. The gas permeability coefficient was different for each film, depending primarily on the surface charge of the crystals and secondly on the film configuration. The films made with CNCHCl displayed gas barriers with nitrogen and oxygen, and gas selectivity with some gas combinations. CNCS films did not show gas selectivity. These results indicate that CNC with low surface charge can be further developed for gas separation and barrier applications.
Authors
Martha Herrera
Luleå tekniska universitet; Materialvetenskap
Other publications
>>
Aji P. Mathew
Luleå tekniska universitet; Materialvetenskap
Other publications
>>
Kristiina Oksman
Luleå tekniska universitet; Materialvetenskap
Other publications
>>
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identifier: oai:DiVA.org:ltu-7580
datestamp: 2021-04-19T12:21:44Z
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10.1016/j.carbpol.2014.06.036
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titleInfo:
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lang: eng
title: Gas permeability and selectivity of cellulose nanocrystals films (layers) deposited by spin coating
abstract: Cellulose nanocrystals (CNC) were extracted from a cellulose residue using two different acid hydrolysis procedures. CNC extracted with sulfuric acid (CNCS) showed higher surface charge (339 μmol/g) compared with crystals extracted with hydrochloric acid (CNCHCl). Spin-coated films with two different configurations were prepared; the first with alternate layers of poly(allylamine hydrochloride) (PAHCl) and CNC and the second with a single layer of PAHCl coated with multilayers of CNC. Film characteristics such as roughness thickness contact angle orientation gas permeability and gas selectivity were studied. Optical microscopy showed more homogeneous films of CNCS compared to CNCHCl. The surface charge of the crystals impacted the films’ hydrophobicity being highest for 25 alternate layers of PAHCl and CNCHCl. The gas permeability coefficient was different for each film depending primarily on the surface charge of the crystals and secondly on the film configuration. The films made with CNCHCl displayed gas barriers with nitrogen and oxygen and gas selectivity with some gas combinations. CNCS films did not show gas selectivity. These results indicate that CNC with low surface charge can be further developed for gas separation and barrier applications.
subject:
@attributes:
lang: eng
authority: uka.se
topic:
Engineering and Technology
Industrial Biotechnology
Bio Materials
@attributes:
lang: swe
authority: uka.se
topic:
Teknik och teknologier
Industriell bioteknik
Biomaterial
@attributes:
lang: swe
authority: ltu
topic: Trä och bionanokompositer
genre: Research subject
@attributes:
lang: eng
authority: ltu
topic: Wood and Bionanocomposites
genre: Research subject
language:
languageTerm: eng
genre:
publication/journal-article
ref
note:
Published
3
Validerad; 2014; 20140623 (andbra)
name:
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type: personal
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Herrera
Martha
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roleTerm: aut
affiliation:
Luleå tekniska universitet
Materialvetenskap
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authority: ltu
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Mathew
Aji P.
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roleTerm: aut
affiliation:
Luleå tekniska universitet
Materialvetenskap
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ajimat
0000-0001-8909-3554
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authority: ltu
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Oksman
Kristiina
role:
roleTerm: aut
affiliation:
Luleå tekniska universitet
Materialvetenskap
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krioks
0000-0003-4762-2854
originInfo:
dateIssued: 2014
relatedItem:
@attributes:
type: host
titleInfo:
title: Carbohydrate Polymers
identifier:
0144-8617
1879-1344
part:
detail:
@attributes:
type: volume
number: 112
extent:
start: 494
end: 501
physicalDescription:
form: print
typeOfResource: text