How properties of cellulose acetate films are affected by conditions of iodine-catalyzed acetylation and type of pulp

Rahim Yadollahi, Mohammadreza Dehghani Firouzabadi, Hossein Mahdavi, Ahmadreza Saraeyan, Hossein Resalati, Kirsi S. Mikkonen, Herbert Sixta

Tutkimustuotos: ArtikkelijulkaisuArtikkeliTieteellinenvertaisarvioitu

Kuvaus

The present study has been carried out to consider the effect of acetylation conditions and type of bleached pulps [Kraft and SO2–ethanol–water (SEW) pulps] on the properties of obtained cellulose acetates (CA) and their films. The acetylation reaction in the absence of solvent was performed by using acetic anhydride and iodine as a catalyst. The efficiency of acetylation and the degree of substitution, crystallinity, transparency, tensile strength, young modulus, differential scanning calorimetry, water vapor permeability (WVP), scanning electron microscope and atomic force microscopy images were studied. The results showed that the while the Young’s modulus and transparency increased by up to 8% of the catalyst due to the increase in iodine charge; higher iodine levels led to embrittlement of the film. The increase in the ratio of acetic anhydride to pulp (A:P) from 10:1 to 20:1 with 4% catalyst led to a reduction of the DS by 8–10%, the crystallinity by 25%, the Young’s modulus by 13–25%, and transparency by 1–34% of a CA obtained from SEW and Kraft pulp, respectively. With the use of higher amounts of the catalyst (8%) and a ratio of A:P equal to 20:1, all properties of CA were suitable for film preparation. WVP of films from Kraft pulp and SEW pulp showed a decrease of about 8.5% and 18% respectively when increasing the iodine amount from 4 to 8% in acetylation. The tensile strength of CA films was initially increased by enhancing the amount of iodine, but then reduced in a similar way to other properties. The condition of acetylation can be adjusted to produce a high-quality CA film according to the characteristics of the pulp used as raw material.
Alkuperäiskielienglanti
LehtiCellulose
Vuosikerta26
Numero10
Sivut6119-6132
Sivumäärä14
ISSN0969-0239
DOI - pysyväislinkit
TilaJulkaistu - 15 heinäkuuta 2019
OKM-julkaisutyyppiA1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä, vertaisarvioitu

Tieteenalat

  • 416 Elintarviketieteet
  • 215 Teknillinen kemia, kemian prosessitekniikka

Lainaa tätä

Yadollahi, R., Dehghani Firouzabadi, M., Mahdavi, H., Saraeyan, A., Resalati, H., Mikkonen, K. S., & Sixta, H. (2019). How properties of cellulose acetate films are affected by conditions of iodine-catalyzed acetylation and type of pulp. Cellulose, 26(10), 6119-6132. https://doi.org/10.1007/s10570-019-02510-0
Yadollahi, Rahim ; Dehghani Firouzabadi, Mohammadreza ; Mahdavi, Hossein ; Saraeyan, Ahmadreza ; Resalati, Hossein ; Mikkonen, Kirsi S. ; Sixta, Herbert. / How properties of cellulose acetate films are affected by conditions of iodine-catalyzed acetylation and type of pulp. Julkaisussa: Cellulose. 2019 ; Vuosikerta 26, Nro 10. Sivut 6119-6132.
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title = "How properties of cellulose acetate films are affected by conditions of iodine-catalyzed acetylation and type of pulp",
abstract = "The present study has been carried out to consider the effect of acetylation conditions and type of bleached pulps [Kraft and SO2–ethanol–water (SEW) pulps] on the properties of obtained cellulose acetates (CA) and their films. The acetylation reaction in the absence of solvent was performed by using acetic anhydride and iodine as a catalyst. The efficiency of acetylation and the degree of substitution, crystallinity, transparency, tensile strength, young modulus, differential scanning calorimetry, water vapor permeability (WVP), scanning electron microscope and atomic force microscopy images were studied. The results showed that the while the Young’s modulus and transparency increased by up to 8{\%} of the catalyst due to the increase in iodine charge; higher iodine levels led to embrittlement of the film. The increase in the ratio of acetic anhydride to pulp (A:P) from 10:1 to 20:1 with 4{\%} catalyst led to a reduction of the DS by 8–10{\%}, the crystallinity by 25{\%}, the Young’s modulus by 13–25{\%}, and transparency by 1–34{\%} of a CA obtained from SEW and Kraft pulp, respectively. With the use of higher amounts of the catalyst (8{\%}) and a ratio of A:P equal to 20:1, all properties of CA were suitable for film preparation. WVP of films from Kraft pulp and SEW pulp showed a decrease of about 8.5{\%} and 18{\%} respectively when increasing the iodine amount from 4 to 8{\%} in acetylation. The tensile strength of CA films was initially increased by enhancing the amount of iodine, but then reduced in a similar way to other properties. The condition of acetylation can be adjusted to produce a high-quality CA film according to the characteristics of the pulp used as raw material.",
keywords = "416 Food Science, Packaging technology, 215 Chemical engineering, Wood technology",
author = "Rahim Yadollahi and {Dehghani Firouzabadi}, Mohammadreza and Hossein Mahdavi and Ahmadreza Saraeyan and Hossein Resalati and Mikkonen, {Kirsi S.} and Herbert Sixta",
year = "2019",
month = "7",
day = "15",
doi = "10.1007/s10570-019-02510-0",
language = "English",
volume = "26",
pages = "6119--6132",
journal = "Cellulose",
issn = "0969-0239",
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Yadollahi, R, Dehghani Firouzabadi, M, Mahdavi, H, Saraeyan, A, Resalati, H, Mikkonen, KS & Sixta, H 2019, 'How properties of cellulose acetate films are affected by conditions of iodine-catalyzed acetylation and type of pulp', Cellulose, Vuosikerta 26, Nro 10, Sivut 6119-6132. https://doi.org/10.1007/s10570-019-02510-0

How properties of cellulose acetate films are affected by conditions of iodine-catalyzed acetylation and type of pulp. / Yadollahi, Rahim; Dehghani Firouzabadi, Mohammadreza; Mahdavi, Hossein; Saraeyan, Ahmadreza; Resalati, Hossein; Mikkonen, Kirsi S.; Sixta, Herbert.

julkaisussa: Cellulose, Vuosikerta 26, Nro 10, 15.07.2019, s. 6119-6132.

Tutkimustuotos: ArtikkelijulkaisuArtikkeliTieteellinenvertaisarvioitu

TY - JOUR

T1 - How properties of cellulose acetate films are affected by conditions of iodine-catalyzed acetylation and type of pulp

AU - Yadollahi, Rahim

AU - Dehghani Firouzabadi, Mohammadreza

AU - Mahdavi, Hossein

AU - Saraeyan, Ahmadreza

AU - Resalati, Hossein

AU - Mikkonen, Kirsi S.

AU - Sixta, Herbert

PY - 2019/7/15

Y1 - 2019/7/15

N2 - The present study has been carried out to consider the effect of acetylation conditions and type of bleached pulps [Kraft and SO2–ethanol–water (SEW) pulps] on the properties of obtained cellulose acetates (CA) and their films. The acetylation reaction in the absence of solvent was performed by using acetic anhydride and iodine as a catalyst. The efficiency of acetylation and the degree of substitution, crystallinity, transparency, tensile strength, young modulus, differential scanning calorimetry, water vapor permeability (WVP), scanning electron microscope and atomic force microscopy images were studied. The results showed that the while the Young’s modulus and transparency increased by up to 8% of the catalyst due to the increase in iodine charge; higher iodine levels led to embrittlement of the film. The increase in the ratio of acetic anhydride to pulp (A:P) from 10:1 to 20:1 with 4% catalyst led to a reduction of the DS by 8–10%, the crystallinity by 25%, the Young’s modulus by 13–25%, and transparency by 1–34% of a CA obtained from SEW and Kraft pulp, respectively. With the use of higher amounts of the catalyst (8%) and a ratio of A:P equal to 20:1, all properties of CA were suitable for film preparation. WVP of films from Kraft pulp and SEW pulp showed a decrease of about 8.5% and 18% respectively when increasing the iodine amount from 4 to 8% in acetylation. The tensile strength of CA films was initially increased by enhancing the amount of iodine, but then reduced in a similar way to other properties. The condition of acetylation can be adjusted to produce a high-quality CA film according to the characteristics of the pulp used as raw material.

AB - The present study has been carried out to consider the effect of acetylation conditions and type of bleached pulps [Kraft and SO2–ethanol–water (SEW) pulps] on the properties of obtained cellulose acetates (CA) and their films. The acetylation reaction in the absence of solvent was performed by using acetic anhydride and iodine as a catalyst. The efficiency of acetylation and the degree of substitution, crystallinity, transparency, tensile strength, young modulus, differential scanning calorimetry, water vapor permeability (WVP), scanning electron microscope and atomic force microscopy images were studied. The results showed that the while the Young’s modulus and transparency increased by up to 8% of the catalyst due to the increase in iodine charge; higher iodine levels led to embrittlement of the film. The increase in the ratio of acetic anhydride to pulp (A:P) from 10:1 to 20:1 with 4% catalyst led to a reduction of the DS by 8–10%, the crystallinity by 25%, the Young’s modulus by 13–25%, and transparency by 1–34% of a CA obtained from SEW and Kraft pulp, respectively. With the use of higher amounts of the catalyst (8%) and a ratio of A:P equal to 20:1, all properties of CA were suitable for film preparation. WVP of films from Kraft pulp and SEW pulp showed a decrease of about 8.5% and 18% respectively when increasing the iodine amount from 4 to 8% in acetylation. The tensile strength of CA films was initially increased by enhancing the amount of iodine, but then reduced in a similar way to other properties. The condition of acetylation can be adjusted to produce a high-quality CA film according to the characteristics of the pulp used as raw material.

KW - 416 Food Science

KW - Packaging technology

KW - 215 Chemical engineering

KW - Wood technology

U2 - 10.1007/s10570-019-02510-0

DO - 10.1007/s10570-019-02510-0

M3 - Article

VL - 26

SP - 6119

EP - 6132

JO - Cellulose

JF - Cellulose

SN - 0969-0239

IS - 10

ER -