Responsive lignin for shape memory applications

Ngoc A. Nguyen; Kelly M. Meek; Christopher C. Bowland; Amit K. Naskar

doi:10.1016/j.polymer.2018.11.055

Responsive lignin for shape memory applications

Ngoc A. Nguyen, Kelly M. Meek, Christopher C. Bowland, Amit K. Naskar

Carbon and Composites

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

19 Scopus citations

Abstract

We analyze thermally unstable lignin linkages that generate reactive sites and promote crosslinking reactions during thermal annealing at 180 °C. This results in significantly enhanced glass transition temperature (T _g ). We use these characteristics of lignin to enhance interfacial reactivity of a lignin-based multiphase polymer synthesized by a dynamic shear process. An approximately 18 °C increase in T _g and more than 230% increase in storage modulus (E') are achieved by thermally annealing the 50 wt% hardwood lignin-nitrile rubber composite for 5 h at 180 °C. Tunable chemical and physical crosslinks within lignin and rubber resulted in shape programmability demonstrating excellent strain recovery of the synthesized renewable materials. The substantial improvement of the elastic work density of the lignin-based elastomers allows a broader applicable stress window for stress/strain sensing. The renewable materials also exhibit a better strain recovery after thermal annealing.

Original language	English
Pages (from-to)	210-222
Number of pages	13
Journal	Polymer
Volume	160
DOIs	https://doi.org/10.1016/j.polymer.2018.11.055
State	Published - Jan 3 2019

Funding

This research at Oak Ridge National Laboratory, managed by UT Battelle , LLC, for the U.S. Department of Energy under contract DE-AC05-00OR22725 , was sponsored by the Office of Energy Efficiency and Renewable Energy (EERE) BioEnergy Technologies Office (BETO) Program . C. C. B acknowledges the Wigner Fellowship Program as part of the Laboratory Directed Research and Development Program of Oak Ridge National Laboratory , managed by UT-Battelle, LLC, for the U.S. Department of Energy .

Funders	Funder number
U.S. Department of Energy	DE-AC05-00OR22725
Battelle
Office of Energy Efficiency and Renewable Energy
Oak Ridge National Laboratory
Bioenergy Technologies Office

Keywords

Elastomer
Shape memory polymer
Shear-induced crosslinking
Thermal activation
Thermo-responsive lignin

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10.1016/j.polymer.2018.11.055

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title = "Responsive lignin for shape memory applications",

abstract = " We analyze thermally unstable lignin linkages that generate reactive sites and promote crosslinking reactions during thermal annealing at 180 °C. This results in significantly enhanced glass transition temperature (T g ). We use these characteristics of lignin to enhance interfacial reactivity of a lignin-based multiphase polymer synthesized by a dynamic shear process. An approximately 18 °C increase in T g and more than 230% increase in storage modulus (E') are achieved by thermally annealing the 50 wt% hardwood lignin-nitrile rubber composite for 5 h at 180 °C. Tunable chemical and physical crosslinks within lignin and rubber resulted in shape programmability demonstrating excellent strain recovery of the synthesized renewable materials. The substantial improvement of the elastic work density of the lignin-based elastomers allows a broader applicable stress window for stress/strain sensing. The renewable materials also exhibit a better strain recovery after thermal annealing.",

keywords = "Elastomer, Shape memory polymer, Shear-induced crosslinking, Thermal activation, Thermo-responsive lignin",

author = "Nguyen, {Ngoc A.} and Meek, {Kelly M.} and Bowland, {Christopher C.} and Naskar, {Amit K.}",

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year = "2019",

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doi = "10.1016/j.polymer.2018.11.055",

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journal = "Polymer",

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T1 - Responsive lignin for shape memory applications

AU - Nguyen, Ngoc A.

AU - Meek, Kelly M.

AU - Bowland, Christopher C.

AU - Naskar, Amit K.

PY - 2019/1/3

Y1 - 2019/1/3

N2 - We analyze thermally unstable lignin linkages that generate reactive sites and promote crosslinking reactions during thermal annealing at 180 °C. This results in significantly enhanced glass transition temperature (T g ). We use these characteristics of lignin to enhance interfacial reactivity of a lignin-based multiphase polymer synthesized by a dynamic shear process. An approximately 18 °C increase in T g and more than 230% increase in storage modulus (E') are achieved by thermally annealing the 50 wt% hardwood lignin-nitrile rubber composite for 5 h at 180 °C. Tunable chemical and physical crosslinks within lignin and rubber resulted in shape programmability demonstrating excellent strain recovery of the synthesized renewable materials. The substantial improvement of the elastic work density of the lignin-based elastomers allows a broader applicable stress window for stress/strain sensing. The renewable materials also exhibit a better strain recovery after thermal annealing.

AB - We analyze thermally unstable lignin linkages that generate reactive sites and promote crosslinking reactions during thermal annealing at 180 °C. This results in significantly enhanced glass transition temperature (T g ). We use these characteristics of lignin to enhance interfacial reactivity of a lignin-based multiphase polymer synthesized by a dynamic shear process. An approximately 18 °C increase in T g and more than 230% increase in storage modulus (E') are achieved by thermally annealing the 50 wt% hardwood lignin-nitrile rubber composite for 5 h at 180 °C. Tunable chemical and physical crosslinks within lignin and rubber resulted in shape programmability demonstrating excellent strain recovery of the synthesized renewable materials. The substantial improvement of the elastic work density of the lignin-based elastomers allows a broader applicable stress window for stress/strain sensing. The renewable materials also exhibit a better strain recovery after thermal annealing.

KW - Elastomer

KW - Shape memory polymer

KW - Shear-induced crosslinking

KW - Thermal activation

KW - Thermo-responsive lignin

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JO - Polymer

JF - Polymer

ER -

Responsive lignin for shape memory applications

Abstract

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Keywords

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