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Kim BM, Choi JS, Jang S, Park H, Lee SY, Jung J, Park J. Sustainable Strategies for Synthesizing Lignin-Incorporated Bio-Based Waterborne Polyurethane with Tunable Characteristics. Polymers (Basel) 2023; 15:3987. [PMID: 37836038 PMCID: PMC10575038 DOI: 10.3390/polym15193987] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2023] [Revised: 09/27/2023] [Accepted: 09/29/2023] [Indexed: 10/15/2023] Open
Abstract
In this study, we introduce a novel approach for synthesizing lignin-incorporated castor-oil-based cationic waterborne polyurethane (CWPU-LX), diverging significantly from conventional waterborne polyurethane dispersion synthesis methods. Our innovative method efficiently reduces the required solvent quantity for CWPU-LX synthesis to approximately 50% of that employed in traditional WBPU experimental procedures. By incorporating lignin into the polyurethane matrix using this efficient and reduced-solvent method, CWPU-LX demonstrates enhanced properties, rendering it a promising material for diverse applications. Dynamic interactions between lignin and polyurethane molecules contribute to improved mechanical properties, enhanced thermal stability, and increased solvent resistance. Dynamic interactions between lignin and polyurethane molecules contribute to improved tensile strength, up to 250% compared to CWPU samples. Furthermore, the inclusion of lignin enhanced thermal stability, showcasing a 4.6% increase in thermal decomposition temperature compared to conventional samples and increased solvent resistance to ethanol. Moreover, CWPU-LX exhibits desirable characteristics such as protection against ultraviolet light and antibacterial properties. These unique properties can be attributed to the presence of the polyphenolic group and the three-dimensional structure of lignin, further highlighting the versatility and potential of this material in various application domains. The integration of lignin, a renewable and abundant resource, into CWPU-LX exemplifies the commitment to environmentally conscious practices and underscores the significance of greener materials in achieving a more sustainable future.
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Affiliation(s)
- Bo Min Kim
- Department of Carbon and Fiber Composite Materials, Kyungpook National University, Daegu 41566, Republic of Korea;
| | - Jin Sil Choi
- Department of Plant Medicine, Kyungpook National University, Daegu 41566, Republic of Korea (S.Y.L.)
| | - Sunjin Jang
- Department of Biofibers and Biomaterial Science, Kyungpook National University, Daegu 41566, Republic of Korea (H.P.)
| | - Hyeji Park
- Department of Biofibers and Biomaterial Science, Kyungpook National University, Daegu 41566, Republic of Korea (H.P.)
| | - Seung Yeol Lee
- Department of Plant Medicine, Kyungpook National University, Daegu 41566, Republic of Korea (S.Y.L.)
| | | | - Jaehyeung Park
- Department of Carbon and Fiber Composite Materials, Kyungpook National University, Daegu 41566, Republic of Korea;
- Department of Biofibers and Biomaterial Science, Kyungpook National University, Daegu 41566, Republic of Korea (H.P.)
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Improvement of Mechanical Properties and Solvent Resistance of Polyurethane Coating by Chemical Grafting of Graphene Oxide. Polymers (Basel) 2023; 15:polym15040882. [PMID: 36850165 PMCID: PMC9963133 DOI: 10.3390/polym15040882] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2022] [Revised: 01/19/2023] [Accepted: 02/07/2023] [Indexed: 02/12/2023] Open
Abstract
Waterborne polyurethane coatings (WPU) are widely used in various types of coatings due to their environmental friendliness, rich gloss, and strong adhesion. However, their inferior mechanical properties and solvent resistance limit their application on the surface of wood products. In this study, graphene oxide (GO) with nanoscale size, large surface area, and abundant functional groups was incorporated into WPU by chemical grafting to improve the dispersion of GO in WPU, resulting in excellent mechanical properties and solvent resistance of WPU coatings. GO with abundant oxygen-containing functional groups and nanoscale size was prepared, and maintained good compatibility with WPU. When the GO concentration was 0.7 wt%, the tensile strength of GO-modified WPU coating film increased by 64.89%, and the abrasion resistance and pendulum hardness increased by 28.19% and 15.87%, respectively. In addition, GO also improved the solvent resistance of WPU coatings. The chemical grafting strategy employed in this study provides a feasible way to improve the dispersion of GO in WPU and provides a useful reference for the modification of waterborne wood coatings.
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Development of lignin-based waterborne polyurethane materials for flame retardant leather application. Polym Bull (Berl) 2022. [DOI: 10.1007/s00289-022-04320-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Yao B, Liu Z, Liu X, Sun F, Cao Z, Ren Y, An X, Bian X, Li X. Improvement of Mechanical and Thermal Properties of Cationic Waterborne Polyurethane by Using an Amino-Rich Multifunctional Macromolecular Crosslinking Agent. Ind Eng Chem Res 2022. [DOI: 10.1021/acs.iecr.1c04988] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Baojian Yao
- School of Chemistry and Chemical Engineering, University of Jinan, No. 336 Nan Xinzhuang West Road, Jinan 250022, P.R. China
| | - Zhanbin Liu
- Shandong Luqiao Group Co., Ltd., No. 14777 Jingshi Road, Jinan 250014, P.R. China
| | - Xiufen Liu
- School of Chemistry and Chemical Engineering, University of Jinan, No. 336 Nan Xinzhuang West Road, Jinan 250022, P.R. China
| | - Fengyuan Sun
- School of Chemistry and Chemical Engineering, University of Jinan, No. 336 Nan Xinzhuang West Road, Jinan 250022, P.R. China
| | - Zhenhao Cao
- School of Chemistry and Chemical Engineering, University of Jinan, No. 336 Nan Xinzhuang West Road, Jinan 250022, P.R. China
| | - Yufang Ren
- School of Chemistry and Chemical Engineering, University of Jinan, No. 336 Nan Xinzhuang West Road, Jinan 250022, P.R. China
| | - Xiaoyan An
- School of Chemistry and Chemical Engineering, University of Jinan, No. 336 Nan Xinzhuang West Road, Jinan 250022, P.R. China
| | - Xiaona Bian
- School of Chemistry and Chemical Engineering, University of Jinan, No. 336 Nan Xinzhuang West Road, Jinan 250022, P.R. China
| | - Xue Li
- School of Chemistry and Chemical Engineering, University of Jinan, No. 336 Nan Xinzhuang West Road, Jinan 250022, P.R. China
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García-Quintero A, Palencia M. A critical analysis of environmental sustainability metrics applied to green synthesis of nanomaterials and the assessment of environmental risks associated with the nanotechnology. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 793:148524. [PMID: 34182452 DOI: 10.1016/j.scitotenv.2021.148524] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Revised: 06/03/2021] [Accepted: 06/14/2021] [Indexed: 05/19/2023]
Abstract
Nanotechnology is one of the most relevant scientific areas today due to its multiple applications in fields such as medicine, environmental remediation, information technology and energy conversion. This importance has led to the need to advance in the development of environmentally sustainable and safe nanomaterials by incorporating the principles of green chemistry during their synthesis and in their applications. However, this qualitative framework of thought does not offer minimum criteria for the use of the term "green", and therefore, this adjective is commonly used to refer to bio-based or nanotechnological processes without taking into account their net ecological impact. In this context, environmental sustainability metrics can be applied to nanotechnology to compare, optimize and quantify the environmental sustainability of synthesis procedures. This review provides an overview of green chemistry and its application in nanotechnology, but also an analysis of the use of green chemistry principles in the development of bio-based nanobiotechnology and nanosynthesis, with special emphasis on the use of sustainability's metrics for the quantitative analysis of nanomaterial synthesis protocols. These include: Atom Economy, E-factor, Process Mass Intensity, Energy Intensity, and Life Cycle Analysis.
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Affiliation(s)
- Angélica García-Quintero
- Research Group in Science with Technological Applications (GI-CAT), Department of Chemistry, Faculty of Natural and Exact Sciences, Universidad del Valle, Cali, Colombia
| | - Manuel Palencia
- Research Group in Science with Technological Applications (GI-CAT), Department of Chemistry, Faculty of Natural and Exact Sciences, Universidad del Valle, Cali, Colombia.
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Chemical and Thermo-Mechanical Properties of Waterborne Polyurethane Dispersion Derived from Jatropha Oil. Polymers (Basel) 2021; 13:polym13050795. [PMID: 33807622 PMCID: PMC7961895 DOI: 10.3390/polym13050795] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2021] [Revised: 02/24/2021] [Accepted: 02/26/2021] [Indexed: 01/19/2023] Open
Abstract
Nowadays, there is a significant trend away from solvent-based polyurethane systems towards waterborne polyurethane dispersions due to government regulations requiring manufacturers to lower total volatile organic compounds, as well as consumer preference for more environmentally friendly products. In this work, a renewable vegetable oil-based polyol derived from jatropha oil was polymerized with isophorone diisocyanate and dimethylol propionic acid to produce anionic waterborne polyurethane dispersion. Free standing films with up to 62 wt.% bio-based content were successfully produced after evaporation of water from the jatropha oil-based waterborne polyurethane (JPU) dispersion, which indicated good film formation. The chemical and thermo-mechanical properties of the JPU films were characterized. By increasing the OH numbers of polyol from 161 mgKOH/g to 217 mgKOH/g, the crosslinking density of the JPU was significantly increased, which lead to a better storage modulus and improved hydrophobicity. Overall, JPU produced from polyol having OH number of 217 mgKOH/g appears to be a promising product for application as a binder for wood and decorative coatings.
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Abstract
The suitable coating process and discoloration effect of the waterborne paint added with color-changing powder on the surface of Chinese fir were investigated using an orthogonal method from three factors of the number of primers, topcoats, and the way of adding color-changing powder. It was found that the number of primers showed the greatest significance on the color difference of paint film, and the method of adding the color-changing powder had the most influence on the gloss of the paint film. Meanwhile, the impact resistance, paint film adhesion, liquid film resistance level, the gloss of coatings, and the composition of waterborne coatings were not affected by the three factors. The results indicated that two primers, two topcoats with color-changing powder, were the most suitable coating technologies for the reversible color waterborne coating to obtain a stable and sustainable discoloration effect. These results will provide a reference for the construction and application of a color-changing coating.
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