Construction of CNC@SiO[sub.2]@PL Based Superhydrophobic Wood with Excellent Abrasion Resistance Based on Nanoindentation Analysis and Good UV Resistance
Construction of superhydrophobic woods with high abrasion resistance is still a major challenge, and micro analysis for abrasion resistance is scarce. To improve these issues, cellulose nanocrystals (CNC)@SiO[sub.2]@phosphorylated lignin (PL) rods were prepared by SiO[sub.2] in situ generated on CNC...
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Published in | Polymers Vol. 15; no. 4 |
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Main Authors | , , , , , , , , |
Format | Journal Article |
Language | English |
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MDPI AG
01.02.2023
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Abstract | Construction of superhydrophobic woods with high abrasion resistance is still a major challenge, and micro analysis for abrasion resistance is scarce. To improve these issues, cellulose nanocrystals (CNC)@SiO[sub.2]@phosphorylated lignin (PL) rods were prepared by SiO[sub.2] in situ generated on CNC, and then the modified lignin attached to the CNC@SiO[sub.2] rods surface. Subsequently, the superhydrophobic coating was constructed using hydrophobic modified CNC@SiO[sub.2]@PL rods as the main structural substance by simple spraying or rolling them onto wood surfaces, and both polydimethylsiloxane (PDMS) and epoxy resin were used as the adhesives. The resulting coating had excellent superhydrophobic properties with a water contact angle (WCA) of 157.4° and a slide angle (SA) of 6°. The introduced PL could enhance ultraviolet (UV) resistance of the coating due to the presence of these groups that absorbed UV light in lignin. In the abrasion resistance test, compared with the SiO[sub.2]/PL coating, the abrasion resistance of the one with CNC was much higher, suggesting that CNC could improve the abrasion resistance of the coating due to its high crystallinity and excellent mechanical strength. The coating with PDMS performed better than the one with epoxy resin because the soft surface could offset part of the external impact by deformation in the abrasion process. This was also consistent with the results of the nanoindentation (NI) tests. In view of the simple preparation and good performance, this superhydrophobic wood will have broad application potential. |
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AbstractList | Construction of superhydrophobic woods with high abrasion resistance is still a major challenge, and micro analysis for abrasion resistance is scarce. To improve these issues, cellulose nanocrystals (CNC)@SiO[sub.2]@phosphorylated lignin (PL) rods were prepared by SiO[sub.2] in situ generated on CNC, and then the modified lignin attached to the CNC@SiO[sub.2] rods surface. Subsequently, the superhydrophobic coating was constructed using hydrophobic modified CNC@SiO[sub.2]@PL rods as the main structural substance by simple spraying or rolling them onto wood surfaces, and both polydimethylsiloxane (PDMS) and epoxy resin were used as the adhesives. The resulting coating had excellent superhydrophobic properties with a water contact angle (WCA) of 157.4° and a slide angle (SA) of 6°. The introduced PL could enhance ultraviolet (UV) resistance of the coating due to the presence of these groups that absorbed UV light in lignin. In the abrasion resistance test, compared with the SiO[sub.2]/PL coating, the abrasion resistance of the one with CNC was much higher, suggesting that CNC could improve the abrasion resistance of the coating due to its high crystallinity and excellent mechanical strength. The coating with PDMS performed better than the one with epoxy resin because the soft surface could offset part of the external impact by deformation in the abrasion process. This was also consistent with the results of the nanoindentation (NI) tests. In view of the simple preparation and good performance, this superhydrophobic wood will have broad application potential. |
Audience | Academic |
Author | Huang, Jingda Wang, Zepeng Cao, Yizhong Zhang, Wenbiao Miao, Yu Ren, Changying Deng, Lan Zhang, Zhupeng Sun, Yi |
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Snippet | Construction of superhydrophobic woods with high abrasion resistance is still a major challenge, and micro analysis for abrasion resistance is scarce. To... |
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Title | Construction of CNC@SiO[sub.2]@PL Based Superhydrophobic Wood with Excellent Abrasion Resistance Based on Nanoindentation Analysis and Good UV Resistance |
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