Stress-transfer in microfibrillated cellulose reinforced poly(lactic acid) composites using Raman spectroscopy

S Tanpichai; WW Sampson; SJ Eichhorn

doi:10.1016/j.compositesa.2012.02.006

Stress-transfer in microfibrillated cellulose reinforced poly(lactic acid) composites using Raman spectroscopy

S Tanpichai, WW Sampson, SJ Eichhorn

Department of Aerospace Engineering

Research output: Contribution to journal › Article (Academic Journal) › peer-review

47 Citations (Scopus)

Abstract

Lyocell fibres were used to make microfibrillated cellulose (MFC) by combined homogenisation and sonication. A web-like structure was obtained with fibril diameters in the range of several micrometers to less than 80 nm. Composite samples with PLA resin reinforced with MFC networks were prepared using compression moulding. Young's modulus and tensile strength of these composites increased by ∼60% and 14% respectively, compared to the pure resin material. Raman spectroscopy was used to monitor the molecular deformation of networks and composite materials. A Raman band initially located at ∼1095 cm -1 was observed to shift towards a lower wavenumber position upon tensile deformation. The rate of Raman band shift with respect to strain for the composites was higher than for the pure MFC networks, indicating that the observed improvement in mechanical properties results from stress transfer from the PLA resin to the MFC fibrils. © 2012 Elsevier Ltd. All rights reserved.

Original language	Undefined/Unknown
Pages (from-to)	1145-1152
Number of pages	8
Journal	Composites Part A: Applied Science and Manufacturing
Volume	43
DOIs	https://doi.org/10.1016/j.compositesa.2012.02.006
Publication status	Published - 1 Jul 2012

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title = "Stress-transfer in microfibrillated cellulose reinforced poly(lactic acid) composites using Raman spectroscopy",

abstract = "Lyocell fibres were used to make microfibrillated cellulose (MFC) by combined homogenisation and sonication. A web-like structure was obtained with fibril diameters in the range of several micrometers to less than 80 nm. Composite samples with PLA resin reinforced with MFC networks were prepared using compression moulding. Young's modulus and tensile strength of these composites increased by ∼60% and 14% respectively, compared to the pure resin material. Raman spectroscopy was used to monitor the molecular deformation of networks and composite materials. A Raman band initially located at ∼1095 cm -1 was observed to shift towards a lower wavenumber position upon tensile deformation. The rate of Raman band shift with respect to strain for the composites was higher than for the pure MFC networks, indicating that the observed improvement in mechanical properties results from stress transfer from the PLA resin to the MFC fibrils. {\textcopyright} 2012 Elsevier Ltd. All rights reserved.",

author = "S Tanpichai and WW Sampson and SJ Eichhorn",

year = "2012",

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doi = "10.1016/j.compositesa.2012.02.006",

language = "Undefined/Unknown",

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TY - JOUR

T1 - Stress-transfer in microfibrillated cellulose reinforced poly(lactic acid) composites using Raman spectroscopy

AU - Tanpichai, S

AU - Sampson, WW

AU - Eichhorn, SJ

PY - 2012/7/1

Y1 - 2012/7/1

N2 - Lyocell fibres were used to make microfibrillated cellulose (MFC) by combined homogenisation and sonication. A web-like structure was obtained with fibril diameters in the range of several micrometers to less than 80 nm. Composite samples with PLA resin reinforced with MFC networks were prepared using compression moulding. Young's modulus and tensile strength of these composites increased by ∼60% and 14% respectively, compared to the pure resin material. Raman spectroscopy was used to monitor the molecular deformation of networks and composite materials. A Raman band initially located at ∼1095 cm -1 was observed to shift towards a lower wavenumber position upon tensile deformation. The rate of Raman band shift with respect to strain for the composites was higher than for the pure MFC networks, indicating that the observed improvement in mechanical properties results from stress transfer from the PLA resin to the MFC fibrils. © 2012 Elsevier Ltd. All rights reserved.

AB - Lyocell fibres were used to make microfibrillated cellulose (MFC) by combined homogenisation and sonication. A web-like structure was obtained with fibril diameters in the range of several micrometers to less than 80 nm. Composite samples with PLA resin reinforced with MFC networks were prepared using compression moulding. Young's modulus and tensile strength of these composites increased by ∼60% and 14% respectively, compared to the pure resin material. Raman spectroscopy was used to monitor the molecular deformation of networks and composite materials. A Raman band initially located at ∼1095 cm -1 was observed to shift towards a lower wavenumber position upon tensile deformation. The rate of Raman band shift with respect to strain for the composites was higher than for the pure MFC networks, indicating that the observed improvement in mechanical properties results from stress transfer from the PLA resin to the MFC fibrils. © 2012 Elsevier Ltd. All rights reserved.

U2 - 10.1016/j.compositesa.2012.02.006

DO - 10.1016/j.compositesa.2012.02.006

M3 - Article (Academic Journal)

VL - 43

SP - 1145

EP - 1152

JO - Composites Part A: Applied Science and Manufacturing

JF - Composites Part A: Applied Science and Manufacturing

SN - 1359-835X

ER -