Hydrophobization, smoothing and barrier improvements of cellulose nanofibril films by sol-gel coatings

Jari Vartiainen, Klaus Rose, Yukihiro Kusano, Juha Mannila, Lisa Wikström

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Single layer films from cellulose nanofibrils on a plastic support were coated with sol-gel coated with inorganic-organic copolymers (ORMOCER®s), consisting of inorganic Si-O-Si based networks combined with ceramic (Al-O- and Zr-O-) groups and special organic fluoroalkyl chain containing functional groups. Sol-gel coatings decreased the surface hydrophilicity and water vapor transmission rate. The water contact angle of uncoated films was 24˚, indicating high affinity between water and the cellulose nanofibrils. All sol-gel coatings tested increased the surface hydrophobicity with the contact angles ranging between 54 and 102˚. The water vapor transmission rates were varying between 230 and 410 g/m2/day. With UV curable highly organically crosslinked coating, the water vapor transmission rate was decreased by 77% as compared to uncoated film. The uncoated film had oxygen transmission rates of 0.7 and 107 cc/m2/day at 50% and 80% RH, respectively. At high humidity conditions, the films tend to swell thus allowing permeation to increase. Sol-gel coatings significantly improved the oxygen barrier properties especially at 80% RH. The transmission rates were varying between 0.4 and 0.5 cc/m2/day (50% RH) and between 51 and 86 cc/m2/day (80% RH).
Original languageEnglish
JournalJournal of Coatings Technology and Research
ISSN1547-0091
DOIs
Publication statusPublished - 2019

Cite this

@article{6d2549cbdb754b07bbeb466d8d160442,
title = "Hydrophobization, smoothing and barrier improvements of cellulose nanofibril films by sol-gel coatings",
abstract = "Single layer films from cellulose nanofibrils on a plastic support were coated with sol-gel coated with inorganic-organic copolymers (ORMOCER{\circledR}s), consisting of inorganic Si-O-Si based networks combined with ceramic (Al-O- and Zr-O-) groups and special organic fluoroalkyl chain containing functional groups. Sol-gel coatings decreased the surface hydrophilicity and water vapor transmission rate. The water contact angle of uncoated films was 24˚, indicating high affinity between water and the cellulose nanofibrils. All sol-gel coatings tested increased the surface hydrophobicity with the contact angles ranging between 54 and 102˚. The water vapor transmission rates were varying between 230 and 410 g/m2/day. With UV curable highly organically crosslinked coating, the water vapor transmission rate was decreased by 77{\%} as compared to uncoated film. The uncoated film had oxygen transmission rates of 0.7 and 107 cc/m2/day at 50{\%} and 80{\%} RH, respectively. At high humidity conditions, the films tend to swell thus allowing permeation to increase. Sol-gel coatings significantly improved the oxygen barrier properties especially at 80{\%} RH. The transmission rates were varying between 0.4 and 0.5 cc/m2/day (50{\%} RH) and between 51 and 86 cc/m2/day (80{\%} RH).",
author = "Jari Vartiainen and Klaus Rose and Yukihiro Kusano and Juha Mannila and Lisa Wikstr{\"o}m",
year = "2019",
doi = "10.1007/s11998-019-00292-5",
language = "English",
journal = "Journal of Coatings Technology and Research",
issn = "1547-0091",
publisher = "Springer New York",

}

Hydrophobization, smoothing and barrier improvements of cellulose nanofibril films by sol-gel coatings. / Vartiainen, Jari ; Rose, Klaus ; Kusano, Yukihiro; Mannila, Juha ; Wikström, Lisa.

In: Journal of Coatings Technology and Research, 2019.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Hydrophobization, smoothing and barrier improvements of cellulose nanofibril films by sol-gel coatings

AU - Vartiainen, Jari

AU - Rose, Klaus

AU - Kusano, Yukihiro

AU - Mannila, Juha

AU - Wikström, Lisa

PY - 2019

Y1 - 2019

N2 - Single layer films from cellulose nanofibrils on a plastic support were coated with sol-gel coated with inorganic-organic copolymers (ORMOCER®s), consisting of inorganic Si-O-Si based networks combined with ceramic (Al-O- and Zr-O-) groups and special organic fluoroalkyl chain containing functional groups. Sol-gel coatings decreased the surface hydrophilicity and water vapor transmission rate. The water contact angle of uncoated films was 24˚, indicating high affinity between water and the cellulose nanofibrils. All sol-gel coatings tested increased the surface hydrophobicity with the contact angles ranging between 54 and 102˚. The water vapor transmission rates were varying between 230 and 410 g/m2/day. With UV curable highly organically crosslinked coating, the water vapor transmission rate was decreased by 77% as compared to uncoated film. The uncoated film had oxygen transmission rates of 0.7 and 107 cc/m2/day at 50% and 80% RH, respectively. At high humidity conditions, the films tend to swell thus allowing permeation to increase. Sol-gel coatings significantly improved the oxygen barrier properties especially at 80% RH. The transmission rates were varying between 0.4 and 0.5 cc/m2/day (50% RH) and between 51 and 86 cc/m2/day (80% RH).

AB - Single layer films from cellulose nanofibrils on a plastic support were coated with sol-gel coated with inorganic-organic copolymers (ORMOCER®s), consisting of inorganic Si-O-Si based networks combined with ceramic (Al-O- and Zr-O-) groups and special organic fluoroalkyl chain containing functional groups. Sol-gel coatings decreased the surface hydrophilicity and water vapor transmission rate. The water contact angle of uncoated films was 24˚, indicating high affinity between water and the cellulose nanofibrils. All sol-gel coatings tested increased the surface hydrophobicity with the contact angles ranging between 54 and 102˚. The water vapor transmission rates were varying between 230 and 410 g/m2/day. With UV curable highly organically crosslinked coating, the water vapor transmission rate was decreased by 77% as compared to uncoated film. The uncoated film had oxygen transmission rates of 0.7 and 107 cc/m2/day at 50% and 80% RH, respectively. At high humidity conditions, the films tend to swell thus allowing permeation to increase. Sol-gel coatings significantly improved the oxygen barrier properties especially at 80% RH. The transmission rates were varying between 0.4 and 0.5 cc/m2/day (50% RH) and between 51 and 86 cc/m2/day (80% RH).

U2 - 10.1007/s11998-019-00292-5

DO - 10.1007/s11998-019-00292-5

M3 - Journal article

JO - Journal of Coatings Technology and Research

JF - Journal of Coatings Technology and Research

SN - 1547-0091

ER -