Performance of Advanced Waterborne Wood Coatings Reinforced with Cellulose Nanocrystals

Muhammad Naveed Khan; Caitlyn M. Clarkson; Md Nuruddin; Ahsan Sharif; Ejaz Ahmad; Jeffrey P. Youngblood

doi:10.1021/acsabm.2c00383

Performance of Advanced Waterborne Wood Coatings Reinforced with Cellulose Nanocrystals

Muhammad Naveed Khan, Caitlyn M. Clarkson, Md Nuruddin, Ahsan Sharif, Ejaz Ahmad, Jeffrey P. Youngblood

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

8 Scopus citations

Abstract

The main objective of this study was to examine the impact of cellulose nanocrystals (CNCs) in advanced waterborne wood coatings such as polycarbonate urethane (PCU) and hybrid alkyd varnish (HAV) in terms of coating performance, mechanical properties, optical properties, and water permeation and uptake properties. The influence of CNCs on the overall quality of the various waterborne wood coatings was investigated by incorporating different percentages of CNCs. Varying CNC content in coating formulations showed that CNCs are effective for waterborne wood coatings; CNCs offer both higher scratch and impact resistance as compared to neat coatings and have a significant reduction in water vapor permeation through a film with little increase in water vapor uptake at high concentrations. It was observed that the CNC darkened and reduced gloss in the coatings and viscosified the dispersion. These research findings suggest that CNCs are well-dispersed at lower concentrations, but at high concentrations, agglomeration occurred. Thus, while CNCs can give better mechanical and permeation performances at contents of up to 5 wt %, at 1 wt % CNCs can still provide modest scratch and chip resistance improvement without loss of optical properties (gloss and color) while retaining a similar water uptake. Overall, it can be concluded that CNCs have the potential to be used as a reinforcement filler in high-performance waterborne wood coatings.

Original language	English
Pages (from-to)	4179-4190
Number of pages	12
Journal	ACS Applied Bio Materials
Volume	5
Issue number	9
DOIs	https://doi.org/10.1021/acsabm.2c00383
State	Published - Sep 19 2022
Externally published	Yes

Funding

The authors gratefully acknowledge the financial support of the Higher Education Commission of Pakistan under International Research Support Initiative (IRSIP) Program and the Private\u2013Public Partnership for Nanotechnology in the Forestry Sector (P3Nano) under Grant no. 107528, and the National Science Foundation Scalable Nanomanufacturing program (CMMI-1449358).

Keywords

cellulose nanocrystals
coating performance
mechanical and optical properties
water permeation and uptake properties
waterborne wood coatings

Access to Document

10.1021/acsabm.2c00383

Cite this

@article{0249b70fce7b49a08baa6846a3d8d894,

title = "Performance of Advanced Waterborne Wood Coatings Reinforced with Cellulose Nanocrystals",

abstract = "The main objective of this study was to examine the impact of cellulose nanocrystals (CNCs) in advanced waterborne wood coatings such as polycarbonate urethane (PCU) and hybrid alkyd varnish (HAV) in terms of coating performance, mechanical properties, optical properties, and water permeation and uptake properties. The influence of CNCs on the overall quality of the various waterborne wood coatings was investigated by incorporating different percentages of CNCs. Varying CNC content in coating formulations showed that CNCs are effective for waterborne wood coatings; CNCs offer both higher scratch and impact resistance as compared to neat coatings and have a significant reduction in water vapor permeation through a film with little increase in water vapor uptake at high concentrations. It was observed that the CNC darkened and reduced gloss in the coatings and viscosified the dispersion. These research findings suggest that CNCs are well-dispersed at lower concentrations, but at high concentrations, agglomeration occurred. Thus, while CNCs can give better mechanical and permeation performances at contents of up to 5 wt %, at 1 wt % CNCs can still provide modest scratch and chip resistance improvement without loss of optical properties (gloss and color) while retaining a similar water uptake. Overall, it can be concluded that CNCs have the potential to be used as a reinforcement filler in high-performance waterborne wood coatings.",

keywords = "cellulose nanocrystals, coating performance, mechanical and optical properties, water permeation and uptake properties, waterborne wood coatings",

author = "Khan, {Muhammad Naveed} and Clarkson, {Caitlyn M.} and Md Nuruddin and Ahsan Sharif and Ejaz Ahmad and Youngblood, {Jeffrey P.}",

note = "Publisher Copyright: {\textcopyright} 2022 American Chemical Society.",

year = "2022",

month = sep,

day = "19",

doi = "10.1021/acsabm.2c00383",

language = "English",

volume = "5",

pages = "4179--4190",

journal = "ACS Applied Bio Materials",

issn = "2576-6422",

publisher = "American Chemical Society",

number = "9",

}

TY - JOUR

T1 - Performance of Advanced Waterborne Wood Coatings Reinforced with Cellulose Nanocrystals

AU - Khan, Muhammad Naveed

AU - Clarkson, Caitlyn M.

AU - Nuruddin, Md

AU - Sharif, Ahsan

AU - Ahmad, Ejaz

AU - Youngblood, Jeffrey P.

PY - 2022/9/19

Y1 - 2022/9/19

N2 - The main objective of this study was to examine the impact of cellulose nanocrystals (CNCs) in advanced waterborne wood coatings such as polycarbonate urethane (PCU) and hybrid alkyd varnish (HAV) in terms of coating performance, mechanical properties, optical properties, and water permeation and uptake properties. The influence of CNCs on the overall quality of the various waterborne wood coatings was investigated by incorporating different percentages of CNCs. Varying CNC content in coating formulations showed that CNCs are effective for waterborne wood coatings; CNCs offer both higher scratch and impact resistance as compared to neat coatings and have a significant reduction in water vapor permeation through a film with little increase in water vapor uptake at high concentrations. It was observed that the CNC darkened and reduced gloss in the coatings and viscosified the dispersion. These research findings suggest that CNCs are well-dispersed at lower concentrations, but at high concentrations, agglomeration occurred. Thus, while CNCs can give better mechanical and permeation performances at contents of up to 5 wt %, at 1 wt % CNCs can still provide modest scratch and chip resistance improvement without loss of optical properties (gloss and color) while retaining a similar water uptake. Overall, it can be concluded that CNCs have the potential to be used as a reinforcement filler in high-performance waterborne wood coatings.

AB - The main objective of this study was to examine the impact of cellulose nanocrystals (CNCs) in advanced waterborne wood coatings such as polycarbonate urethane (PCU) and hybrid alkyd varnish (HAV) in terms of coating performance, mechanical properties, optical properties, and water permeation and uptake properties. The influence of CNCs on the overall quality of the various waterborne wood coatings was investigated by incorporating different percentages of CNCs. Varying CNC content in coating formulations showed that CNCs are effective for waterborne wood coatings; CNCs offer both higher scratch and impact resistance as compared to neat coatings and have a significant reduction in water vapor permeation through a film with little increase in water vapor uptake at high concentrations. It was observed that the CNC darkened and reduced gloss in the coatings and viscosified the dispersion. These research findings suggest that CNCs are well-dispersed at lower concentrations, but at high concentrations, agglomeration occurred. Thus, while CNCs can give better mechanical and permeation performances at contents of up to 5 wt %, at 1 wt % CNCs can still provide modest scratch and chip resistance improvement without loss of optical properties (gloss and color) while retaining a similar water uptake. Overall, it can be concluded that CNCs have the potential to be used as a reinforcement filler in high-performance waterborne wood coatings.

KW - cellulose nanocrystals

KW - coating performance

KW - mechanical and optical properties

KW - water permeation and uptake properties

KW - waterborne wood coatings

UR - http://www.scopus.com/inward/record.url?scp=85137302700&partnerID=8YFLogxK

U2 - 10.1021/acsabm.2c00383

DO - 10.1021/acsabm.2c00383

M3 - Article

AN - SCOPUS:85137302700

SN - 2576-6422

VL - 5

SP - 4179

EP - 4190

JO - ACS Applied Bio Materials

JF - ACS Applied Bio Materials

IS - 9

ER -

Performance of Advanced Waterborne Wood Coatings Reinforced with Cellulose Nanocrystals

Abstract

Funding

Keywords

Access to Document

Other files and links

Fingerprint

Cite this