Exploring the effect of humidity on thermoplastic starch films using the quartz crystal microbalance

Matthew D. Eaton; Daniel Domene-López; Qifeng Wang; Mercedes G. Montalbán; Ignacio Martin-Gullon; Kenneth R. Shull

doi:10.1016/j.carbpol.2021.117727

Exploring the effect of humidity on thermoplastic starch films using the quartz crystal microbalance

Matthew D. Eaton, Daniel Domene-López, Qifeng Wang, Mercedes G. Montalbán, Ignacio Martin-Gullon, Kenneth R. Shull^*

^*Corresponding author for this work

Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

21 Scopus citations

Abstract

The quartz crystal microbalance (QCM) is used as a non-destructive and efficient characterization tool for thin thermoplastic starch (TPS) films. Thin TPS films (1-2 μm) were prepared with 30% (w/w starch) plasticizers using either glycerol or an ionic liquid, 1-ethyl-3-methylimidiazolium acetate ([emim⁺][Ac⁻]), as the plasticizer. The differences in the mechanical properties and environmental effects on the plasticized TPS films were explored. The modulus of starch-glycerol films was higher than starch-[emim⁺][Ac⁻], consistent with literature data and bulk AFM measurements, likely due to superior plasticization by the ionic liquid. The starch-[emim⁺][Ac⁻] films were shown to have relative stable properties at low humidity that may be due to some antiplasticization effects at low water content despite absorbing more water than starch-glycerol films at higher humidity.

Original language	English (US)
Article number	117727
Journal	Carbohydrate Polymers
Volume	261
DOIs	https://doi.org/10.1016/j.carbpol.2021.117727
State	Published - Jun 1 2021

Funding

This work was supported by the National Science Foundation (NSF) (No. DMR-1710491) and by Financial Assistance Award No. 70NANB19H005 from the U.S. Department of Commerce, National Institute of Standards and Technology as part of the Center for Hierarchical Materials Design (CHiMaD). Additionally, this work made use of the SPID facility of Northwestern University's NUANCE Center, which has received support from the SHyNE Resource (NSF ECCS-1542205), the IIN, and Northwestern's MRSEC program (NSF DMR-1720139). We also acknowledge support from the US Department of Defense National Defense Science and Engineering Graduate (NDSEG) fellowship and support from the Richter Trust Funds. We also acknowledge support from Spain's Ministry of Science (PID2019-108632RB-I00, CTQ2016-78246-R and FJCI-2016-28081). This work was supported by the National Science Foundation (NSF) (No. DMR-1710491) and by Financial Assistance Award No. 70NANB19H005 from the U.S. Department of Commerce, National Institute of Standards and Technology as part of the Center for Hierarchical Materials Design (CHiMaD). Additionally, this work made use of the SPID facility of Northwestern University’s NUANCE Center, which has received support from the SHyNE Resource (NSF ECCS-1542205), the IIN, and Northwestern’s MRSEC program (NSF DMR-1720139). We also acknowledge support from the US Department of Defense National Defense Science and Engineering Graduate (NDSEG) fellowship and support from the Richter Trust Funds. We also acknowledge support from Spain’s Ministry of Science (PID2019-108632RB-I00, CTQ2016-78246-R and FJCI-2016-28081).

Keywords

Humidity
Phase behavior
QCM
Quartz crystal microbalance
Swelling
Thermoplastic starch

ASJC Scopus subject areas

Organic Chemistry
Polymers and Plastics
Materials Chemistry

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10.1016/j.carbpol.2021.117727

Cite this

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title = "Exploring the effect of humidity on thermoplastic starch films using the quartz crystal microbalance",

abstract = "The quartz crystal microbalance (QCM) is used as a non-destructive and efficient characterization tool for thin thermoplastic starch (TPS) films. Thin TPS films (1-2 μm) were prepared with 30% (w/w starch) plasticizers using either glycerol or an ionic liquid, 1-ethyl-3-methylimidiazolium acetate ([emim+][Ac−]), as the plasticizer. The differences in the mechanical properties and environmental effects on the plasticized TPS films were explored. The modulus of starch-glycerol films was higher than starch-[emim+][Ac−], consistent with literature data and bulk AFM measurements, likely due to superior plasticization by the ionic liquid. The starch-[emim+][Ac−] films were shown to have relative stable properties at low humidity that may be due to some antiplasticization effects at low water content despite absorbing more water than starch-glycerol films at higher humidity.",

keywords = "Humidity, Phase behavior, QCM, Quartz crystal microbalance, Swelling, Thermoplastic starch",

author = "Eaton, {Matthew D.} and Daniel Domene-L{\'o}pez and Qifeng Wang and {G. Montalb{\'a}n}, Mercedes and Ignacio Martin-Gullon and Shull, {Kenneth R.}",

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doi = "10.1016/j.carbpol.2021.117727",

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AU - Eaton, Matthew D.

AU - Domene-López, Daniel

AU - Wang, Qifeng

AU - G. Montalbán, Mercedes

AU - Martin-Gullon, Ignacio

AU - Shull, Kenneth R.

PY - 2021/6/1

Y1 - 2021/6/1

N2 - The quartz crystal microbalance (QCM) is used as a non-destructive and efficient characterization tool for thin thermoplastic starch (TPS) films. Thin TPS films (1-2 μm) were prepared with 30% (w/w starch) plasticizers using either glycerol or an ionic liquid, 1-ethyl-3-methylimidiazolium acetate ([emim+][Ac−]), as the plasticizer. The differences in the mechanical properties and environmental effects on the plasticized TPS films were explored. The modulus of starch-glycerol films was higher than starch-[emim+][Ac−], consistent with literature data and bulk AFM measurements, likely due to superior plasticization by the ionic liquid. The starch-[emim+][Ac−] films were shown to have relative stable properties at low humidity that may be due to some antiplasticization effects at low water content despite absorbing more water than starch-glycerol films at higher humidity.

AB - The quartz crystal microbalance (QCM) is used as a non-destructive and efficient characterization tool for thin thermoplastic starch (TPS) films. Thin TPS films (1-2 μm) were prepared with 30% (w/w starch) plasticizers using either glycerol or an ionic liquid, 1-ethyl-3-methylimidiazolium acetate ([emim+][Ac−]), as the plasticizer. The differences in the mechanical properties and environmental effects on the plasticized TPS films were explored. The modulus of starch-glycerol films was higher than starch-[emim+][Ac−], consistent with literature data and bulk AFM measurements, likely due to superior plasticization by the ionic liquid. The starch-[emim+][Ac−] films were shown to have relative stable properties at low humidity that may be due to some antiplasticization effects at low water content despite absorbing more water than starch-glycerol films at higher humidity.

KW - Humidity

KW - Phase behavior

KW - QCM

KW - Quartz crystal microbalance

KW - Swelling

KW - Thermoplastic starch

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Exploring the effect of humidity on thermoplastic starch films using the quartz crystal microbalance

Abstract

Funding

Keywords

ASJC Scopus subject areas

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