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Polymers
Volume 14
Issue 2
10.3390/polym14020257
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Article

Preparation of Transparent Fast-Growing Poplar Veneers with a Superior Optical Performance, Excellent Mechanical Properties, and Thermal Insulation by Acetylation Modification Using a Green Catalyst

by
Wen He
1,2,*,
Rui Wang
1,
Feiyu Guo
1,
Jizhou Cao
1,
Zhihao Guo
1,
Han Qiang
1,
Shuang Liang
1,
Qunyan Pang
1 and
Bairen Wei
1
1
College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China
2
Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing 210037, China
*
Author to whom correspondence should be addressed.
Polymers 2022, 14(2), 257; https://doi.org/10.3390/polym14020257
Submission received: 3 December 2021 / Revised: 21 December 2021 / Accepted: 29 December 2021 / Published: 8 January 2022
(This article belongs to the Topic Advances in Biomaterials)
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Abstract

There has been growing interest in transparent conductive substrates due to the prevailing flexible electron devices and the need for sustainable resources. In this study, we demonstrated a transparent fast-growing poplar veneers prepared by acetylated modification, followed by the infiltration of epoxy resin. The work mainly focused on the effect of acetylation treatment using a green catalyst of 4-Dimethylpyridine on the interface of the bulk fast-growing poplar veneer, and the result indicated that the interface hydrophobicity was greatly enhanced due to the higher substitute of acetyl groups; therefore, the interface compatibility between the cell wall and epoxy resin was improved. The obtained transparent fast-growing poplar veneers, hereafter referred to as TADPV, displayed a superior optical performance and flexibility, in which the light transmittance and haze were 90% and 70% at a wavelength of 550 nm, respectively, and the bending radius and bending angle parallel to grain of TADPV were 2 mm and 130°, respectively. Moreover, the tensile strength and tensile modulus of the TADPV were around 102 MPa and 198 MPa, respectively, which is significantly better than those of the plastic substrates used in flexible electron devices. At the same time, the thermal conductivity tests indicated that TADPV has a low coefficient of thermal conductivity of 0.34 Wm−1 K−1, which can completely meet the needs of transparent conductive substrates. Therefore, the obtained TADPV can be used as a candidate for a flexible transparent substrate of electron devices.
Keywords: fast-growing poplar veneers; acetylated modification; interface compatibility; optical performance; thermal conductivity fast-growing poplar veneers; acetylated modification; interface compatibility; optical performance; thermal conductivity

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MDPI and ACS Style

He, W.; Wang, R.; Guo, F.; Cao, J.; Guo, Z.; Qiang, H.; Liang, S.; Pang, Q.; Wei, B. Preparation of Transparent Fast-Growing Poplar Veneers with a Superior Optical Performance, Excellent Mechanical Properties, and Thermal Insulation by Acetylation Modification Using a Green Catalyst. Polymers 2022, 14, 257. https://doi.org/10.3390/polym14020257

AMA Style

He W, Wang R, Guo F, Cao J, Guo Z, Qiang H, Liang S, Pang Q, Wei B. Preparation of Transparent Fast-Growing Poplar Veneers with a Superior Optical Performance, Excellent Mechanical Properties, and Thermal Insulation by Acetylation Modification Using a Green Catalyst. Polymers. 2022; 14(2):257. https://doi.org/10.3390/polym14020257

Chicago/Turabian Style

He, Wen, Rui Wang, Feiyu Guo, Jizhou Cao, Zhihao Guo, Han Qiang, Shuang Liang, Qunyan Pang, and Bairen Wei. 2022. "Preparation of Transparent Fast-Growing Poplar Veneers with a Superior Optical Performance, Excellent Mechanical Properties, and Thermal Insulation by Acetylation Modification Using a Green Catalyst" Polymers 14, no. 2: 257. https://doi.org/10.3390/polym14020257

APA Style

He, W., Wang, R., Guo, F., Cao, J., Guo, Z., Qiang, H., Liang, S., Pang, Q., & Wei, B. (2022). Preparation of Transparent Fast-Growing Poplar Veneers with a Superior Optical Performance, Excellent Mechanical Properties, and Thermal Insulation by Acetylation Modification Using a Green Catalyst. Polymers, 14(2), 257. https://doi.org/10.3390/polym14020257

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