1
|
Liu W, Liu X, Lv J. Comparative Study on UV Degradation of Black Chinese Lacquers with Different Additives. MATERIALS (BASEL, SWITZERLAND) 2023; 16:5607. [PMID: 37629897 PMCID: PMC10456897 DOI: 10.3390/ma16165607] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 07/27/2023] [Accepted: 08/05/2023] [Indexed: 08/27/2023]
Abstract
This study investigates the UV degradation of black Chinese lacquer by incorporating carbon black and ferrous hydroxide as additives. The purpose of this research is to understand the effects of these additives on the degradation behavior of the lacquer film. Different concentrations of carbon black powder (1%, 3%, and 5%) and Fe(OH)2 (10%, 20%, and 30%) were added to the lacquer following traditional techniques. The main methods employed for analysis were gloss loss measurement, color change assessment, SEM imaging, FTIR spectroscopy, and XPS analysis. The results demonstrate a significant decrease in gloss levels and an increase in lightness values with increasing ultraviolet exposure time. SEM images reveal the formation of cracks in the lacquer film. FTIR analysis indicates oxidation of the urushiol side chain and an increase in oxidation products. The infrared difference spectrum highlights the differences between the additives, with Fe(OH)2 showing a lower impact on the spectra compared to carbon black. XPS analysis confirms the oxidation of the C-H functional group and the presence of C-O-C and C-OH groups. In conclusion, this study sheds light on the influence of carbon black and ferrous hydroxide additives on the UV degradation of black Chinese lacquer and suggests the protective effect of Fe(OH)2 against UV aging. These findings contribute to a better understanding of the degradation mechanisms and provide insights for improving the UV resistance of Chinese lacquer coatings. Further research can explore alternative additives and optimization strategies to mitigate UV-induced degradation.
Collapse
Affiliation(s)
- Wenjia Liu
- Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing 210037, China;
- College of Furnishing and Industrial Design, Nanjing Forestry University, Str. Longpan No. 159, Nanjing 210037, China
| | - Xinyou Liu
- Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing 210037, China;
- College of Furnishing and Industrial Design, Nanjing Forestry University, Str. Longpan No. 159, Nanjing 210037, China
- Faculty of Furniture Design and Wood Engineering, Transilvania University of Brasov, 500036 Brasov, Romania
| | - Jiufang Lv
- Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing 210037, China;
- College of Furnishing and Industrial Design, Nanjing Forestry University, Str. Longpan No. 159, Nanjing 210037, China
| |
Collapse
|
2
|
Vardanyan A, Guillon A, Budnyak T, Seisenbaeva GA. Tailoring Nanoadsorbent Surfaces: Separation of Rare Earths and Late Transition Metals in Recycling of Magnet Materials. NANOMATERIALS 2022; 12:nano12060974. [PMID: 35335787 PMCID: PMC8950031 DOI: 10.3390/nano12060974] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/09/2022] [Revised: 03/09/2022] [Accepted: 03/14/2022] [Indexed: 12/29/2022]
Abstract
Novel silica-based adsorbents were synthesized by grafting the surface of SiO2 nanoparticles with amine and sulfur containing functional groups. Produced nanomaterials were characterized by SEM-EDS, AFM, FTIR, TGA and tested for adsorption and separation of Rare Earth Elements (REE) (Nd3+ and Sm3+) and Late Transition Metals (LTM) (Ni2+ and Co2+) in single and mixed solutions. The adsorption equilibrium data analyzed and fitted well to Langmuir isotherm model revealing monolayer adsorption process on homogeneously functionalized silica nanoparticles (NPs). All organo-silicas showed high adsorption capacities ranging between 0.5 and 1.8 mmol/g, depending on the function and the target metal ion. Most of these ligands demonstrated higher affinity towards LTM, related to the nature of the functional groups and their arrangement on the surface of nanoadsorbent.
Collapse
Affiliation(s)
- Ani Vardanyan
- Department of Molecular Sciences, Swedish University of Agricultural Sciences, P.O. Box 7015, 75007 Uppsala, Sweden;
- Correspondence: (A.V.); (G.A.S.)
| | - Anna Guillon
- Department of Molecular Sciences, Swedish University of Agricultural Sciences, P.O. Box 7015, 75007 Uppsala, Sweden;
| | - Tetyana Budnyak
- Department of Materials Science and Engineering, Division of Nanotechnology and Functional Materials, Uppsala University, P.O. Box 35, 75103 Uppsala, Sweden;
| | - Gulaim A. Seisenbaeva
- Department of Molecular Sciences, Swedish University of Agricultural Sciences, P.O. Box 7015, 75007 Uppsala, Sweden;
- Correspondence: (A.V.); (G.A.S.)
| |
Collapse
|
3
|
Zhao Y, He X, Wang H, Zhu J, Wang H, Zheng Y, Zhu S, Cui Z. Synthesis of an urushiol derivative and its use for hydrolysis resistance in dentin adhesive. RSC Adv 2021; 11:18448-18457. [PMID: 35480923 PMCID: PMC9033433 DOI: 10.1039/d1ra00471a] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Accepted: 05/16/2021] [Indexed: 12/11/2022] Open
Abstract
Hydrolysis resistance is essential to the durability of the dentin bonding interface. Urushiol is a natural monomer that has been used in different fields over thousands of years but has the disadvantage of a long drying time. In this study, we evaluated a novel photocurable derivative of urushiol as the main monomer for polymerization in dentin adhesive and its effect on hydrolysis resistance. The derivative was characterized by Fourier transform infrared spectroscopy and 1H nuclear magnetic resonance spectroscopy. Compared with the Adper Single Bond 2, the experimentally synthesized adhesives had higher contact angles. In particular, the water sorption/solubility of the experimental samples were significantly lower than that of Adper Single Bond 2. The microtensile bond strengths of the test groups were higher than that of the control group, even after 5000 thermocycles. Cytotoxicity test results showed that adhesives based on the original derivative induced low toxicity to L929 cells. The results of this study may shift the focus of future research to natural monomers and even their derivatives which may perform well in dentistry.
Collapse
Affiliation(s)
- Ying Zhao
- Department of Prosthetic Dentistry, School and Hospital of Stomatology, Jilin University Changchun 130021 P. R. China
| | - Xi He
- Department of Prosthetic Dentistry, School and Hospital of Stomatology, Jilin University Changchun 130021 P. R. China
| | - Han Wang
- Department of Prosthetic Dentistry, School and Hospital of Stomatology, Jilin University Changchun 130021 P. R. China
| | - Jiufu Zhu
- State Key Lab of Supramolecular Structure and Materials, College of Chemistry, Jilin University Changchun 130021 P. R. China
| | - Huimin Wang
- Department of Prosthetic Dentistry, School and Hospital of Stomatology, Jilin University Changchun 130021 P. R. China
| | - Yan Zheng
- State Key Lab of Supramolecular Structure and Materials, College of Chemistry, Jilin University Changchun 130021 P. R. China
| | - Song Zhu
- Department of Prosthetic Dentistry, School and Hospital of Stomatology, Jilin University Changchun 130021 P. R. China
| | - Zhanchen Cui
- State Key Lab of Supramolecular Structure and Materials, College of Chemistry, Jilin University Changchun 130021 P. R. China
| |
Collapse
|
4
|
Oh HJ, Hwang JH, Park M, Kim SJ, Lee J, Lim HS, Lee SS, Lim JA, Lee E. Nano-emulsification of oriental lacquer sap by ultrasonic wave propagation: Improvement of thin-film characteristics as a natural resin. ULTRASONICS SONOCHEMISTRY 2021; 73:105545. [PMID: 33836371 PMCID: PMC8056267 DOI: 10.1016/j.ultsonch.2021.105545] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/28/2021] [Revised: 03/22/2021] [Accepted: 03/24/2021] [Indexed: 06/12/2023]
Abstract
Lacquer sap has received much attention as a traditional natural resin because it is a renewable and eco-friendly biopolymer resource unlike artificial coating materials. However, strict drying conditions and long drying times of lacquer sap should be modified to expand its applications. This study presents the first attempt to investigate the effect of different amplitudes of ultrasonic waves on the lacquer sap composed of water-in-oil (W/O) emulsion droplets and the mechanical properties of the resultant film by solvent evaporation. Acoustically induced cavitation via batch ultrasonication facilitates the generation of submicron-sized W/O emulsion. The drying time of sonicated lacquer sap was noticeably shortened as the amplitude of acoustic power increased. Interestingly, the transparency of the film cast from lacquer sap consisting of the smallest emulsion droplets increased significantly, weakening the degree of colour change from caramel-like yellow to dark brown as polymerisation progressed. These are attributed to the effective and frequent contact of laccase enzyme with urushiol at the increased interfacial area of nano-emulsified W/O droplets pulverised by ultrasonic waves. The quinone radical-generation in the interface layer and its transfer to the urushiol oil phase through water-insoluble glycoprotein emulsifier are greatly promoted, resulting in highly cross-linked, dense three-dimensional polymer networks, which also increased the lacquer film hardness after drying. As the emulsion droplet size decreased, the mutual interaction between the catechol moiety of urushiol and the substrates increased, resulting in improved adhesion. The nano-emulsification of the lacquer sap by ultrasonic waves can be used in a simple, effective, and eco-friendly way to shorten the drying time and improve the film characteristics of natural resins. This approach could pave the way for its wide range of applications in industrial fields, taking into account green and sustainable chemistry.
Collapse
Affiliation(s)
- Hyo-Jun Oh
- School of Materials Science and Engineering, Gwangju Institute of Science and Technology (GIST), Gwangju 61005, Republic of Korea
| | - Jun Ho Hwang
- School of Materials Science and Engineering, Gwangju Institute of Science and Technology (GIST), Gwangju 61005, Republic of Korea
| | - Minju Park
- School of Materials Science and Engineering, Gwangju Institute of Science and Technology (GIST), Gwangju 61005, Republic of Korea
| | - Soo Jin Kim
- Photo-Electronic Hybrids Research Center, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea
| | - Jihoo Lee
- School of Materials Science and Engineering, Gwangju Institute of Science and Technology (GIST), Gwangju 61005, Republic of Korea
| | - Ho Sun Lim
- Department of Chemical and Biological Engineering, Sookmyung Women's University, Seoul 04310, Republic of Korea
| | - Sang-Soo Lee
- Photo-Electronic Hybrids Research Center, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea
| | - Jung Ah Lim
- Photo-Electronic Hybrids Research Center, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea
| | - Eunji Lee
- School of Materials Science and Engineering, Gwangju Institute of Science and Technology (GIST), Gwangju 61005, Republic of Korea.
| |
Collapse
|
5
|
Wei Z, Chen X, Duan J, Mei C, Xiao D, Zhang A. Precision synthesis of 3-substituted urushiol analogues and the realization of their urushiol-like performance. RSC Adv 2019; 9:24904-24914. [PMID: 35528654 PMCID: PMC9069942 DOI: 10.1039/c9ra04981a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2019] [Accepted: 07/24/2019] [Indexed: 01/12/2023] Open
Abstract
Urushiol is a resource-limited natural coating material with diverse applications; however, the synthesis of urushiol analogues and the realization of their urushiol-like performance remain challenging. Herein, four urushiol analogues, namely, 3-((4-alkenoylpiperazin-1-yl)methyl)catechols with the precise 3-substitution pattern on a catechol as that found in urushiol were synthesized by employing the Mannich reaction of catechol with formaldehyde and N-Boc-piperazine as the key step in a two-step route. By using optimization, the advantages of convenience in operation, cost-effectiveness, and scalability could be obtained. The electropolymerization of these analogues on copper was found to be practical due to their higher aerobic stability than urushiol, affording robust coatings with desirable hardness, adhesion strength, hydrophobicity, and thermal stability. Furthermore, the coatings exhibited effective corrosion protection on copper with initial anticorrosion efficiency up to 99.9% and comparatively higher efficiency (more than 97%) after 4 weeks of immersion in 3.5 wt% NaCl solution. The evidence from the electrochemical and infrared spectroscopic characterization data revealed that the electropolymerization process mechanically involved the free radical coupling of phenoxyl radicals to themselves and to the C
Created by potrace 1.16, written by Peter Selinger 2001-2019
]]>
C bonds in the side chain, forming a robust crosslinking coating. This work paves a way for the synthesis of high-performance urushiol analogues with potential applications as metal protection materials. Regioselective Mannich reaction was performed on catechol, yielding 3-substituted urushiol analogues that could be electropolymerized to achieve the desirable urushiol-like performance.![]()
Collapse
Affiliation(s)
- Zengfeng Wei
- Key Laboratory of Pesticide & Chemical Biology of the Ministry of Education
- College of Chemistry
- Central China Normal University
- Wuhan 430079
- P. R. China
| | - Xin Chen
- Key Laboratory of Pesticide & Chemical Biology of the Ministry of Education
- College of Chemistry
- Central China Normal University
- Wuhan 430079
- P. R. China
| | - Jiang Duan
- Key Laboratory of Pesticide & Chemical Biology of the Ministry of Education
- College of Chemistry
- Central China Normal University
- Wuhan 430079
- P. R. China
| | - Caihong Mei
- Key Laboratory of Pesticide & Chemical Biology of the Ministry of Education
- College of Chemistry
- Central China Normal University
- Wuhan 430079
- P. R. China
| | - Dan Xiao
- Key Laboratory of Pesticide & Chemical Biology of the Ministry of Education
- College of Chemistry
- Central China Normal University
- Wuhan 430079
- P. R. China
| | - Aidong Zhang
- Key Laboratory of Pesticide & Chemical Biology of the Ministry of Education
- College of Chemistry
- Central China Normal University
- Wuhan 430079
- P. R. China
| |
Collapse
|