Preparation and Characterization of Soybean Protein Adhesives Modified with an Environmental-Friendly Tannin-Based Resin
Soybean protein-based adhesives are limited in their application due to their poor wet bonding strength and poor water resistance. Herein, we prepared a novel, environmentally friendly soybean protein-based adhesive by adding tannin-based resin (TR) to improve the performance of water resistance and...
| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2023-05-01
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| Series: | Polymers |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2073-4360/15/10/2289 |
| _version_ | 1797598538813669376 |
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| author | Hanyin Li Yujie Wang Wenwen Xie Yang Tang Fan Yang Chenrui Gong Chao Wang Xiaona Li Cheng Li |
| author_facet | Hanyin Li Yujie Wang Wenwen Xie Yang Tang Fan Yang Chenrui Gong Chao Wang Xiaona Li Cheng Li |
| author_sort | Hanyin Li |
| collection | DOAJ |
| description | Soybean protein-based adhesives are limited in their application due to their poor wet bonding strength and poor water resistance. Herein, we prepared a novel, environmentally friendly soybean protein-based adhesive by adding tannin-based resin (TR) to improve the performance of water resistance and wet bonding strength. The active sites of TR reacted with the soybean protein and its functional groups and formed strong cross-linked network structures, which improved the cross-link density of the adhesives and then improved the water resistance. The residual rate increased to 81.06% when 20 wt%TR was added, and the water resistance bonding strength reached 1.07 MPa, which fully met the Chinese national requirements for plywood (Class II, ≥0.7 MPa). SEM observations were performed on the fracture surfaces of all modified SPI adhesives after curing. The modified adhesive has a denser and smooth cross-section. Based on the TG and DTG plots, the thermal stability performance of the TR-modified SPI adhesive was improved when TR was added. The total weight loss of the adhesive decreased from 65.13% to 58.87%. This study provides a method for preparing low-cost and high-performance, environmentally friendly adhesives. |
| first_indexed | 2024-03-11T03:22:33Z |
| format | Article |
| id | doaj.art-91798350a5704e5599d612860b9358bd |
| institution | Directory Open Access Journal |
| issn | 2073-4360 |
| language | English |
| last_indexed | 2024-03-11T03:22:33Z |
| publishDate | 2023-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Polymers |
| spelling | doaj.art-91798350a5704e5599d612860b9358bd2023-11-18T02:57:54ZengMDPI AGPolymers2073-43602023-05-011510228910.3390/polym15102289Preparation and Characterization of Soybean Protein Adhesives Modified with an Environmental-Friendly Tannin-Based ResinHanyin Li0Yujie Wang1Wenwen Xie2Yang Tang3Fan Yang4Chenrui Gong5Chao Wang6Xiaona Li7Cheng Li8College of Forestry, Henan Agricultural University, Zhengzhou 450002, ChinaCollege of Forestry, Henan Agricultural University, Zhengzhou 450002, ChinaCollege of Forestry, Henan Agricultural University, Zhengzhou 450002, ChinaCollege of Forestry, Henan Agricultural University, Zhengzhou 450002, ChinaCollege of Forestry, Henan Agricultural University, Zhengzhou 450002, ChinaCollege of Forestry, Henan Agricultural University, Zhengzhou 450002, ChinaCollege of Forestry, Henan Agricultural University, Zhengzhou 450002, ChinaCollege of Material Science and Engineering, Nanjing Forestry University, Longpan Road 159, Xuanwu District, Nanjing 210037, ChinaCollege of Forestry, Henan Agricultural University, Zhengzhou 450002, ChinaSoybean protein-based adhesives are limited in their application due to their poor wet bonding strength and poor water resistance. Herein, we prepared a novel, environmentally friendly soybean protein-based adhesive by adding tannin-based resin (TR) to improve the performance of water resistance and wet bonding strength. The active sites of TR reacted with the soybean protein and its functional groups and formed strong cross-linked network structures, which improved the cross-link density of the adhesives and then improved the water resistance. The residual rate increased to 81.06% when 20 wt%TR was added, and the water resistance bonding strength reached 1.07 MPa, which fully met the Chinese national requirements for plywood (Class II, ≥0.7 MPa). SEM observations were performed on the fracture surfaces of all modified SPI adhesives after curing. The modified adhesive has a denser and smooth cross-section. Based on the TG and DTG plots, the thermal stability performance of the TR-modified SPI adhesive was improved when TR was added. The total weight loss of the adhesive decreased from 65.13% to 58.87%. This study provides a method for preparing low-cost and high-performance, environmentally friendly adhesives.https://www.mdpi.com/2073-4360/15/10/2289tanninadhesivesoybean proteinplywoodwet shear strength |
| spellingShingle | Hanyin Li Yujie Wang Wenwen Xie Yang Tang Fan Yang Chenrui Gong Chao Wang Xiaona Li Cheng Li Preparation and Characterization of Soybean Protein Adhesives Modified with an Environmental-Friendly Tannin-Based Resin Polymers tannin adhesive soybean protein plywood wet shear strength |
| title | Preparation and Characterization of Soybean Protein Adhesives Modified with an Environmental-Friendly Tannin-Based Resin |
| title_full | Preparation and Characterization of Soybean Protein Adhesives Modified with an Environmental-Friendly Tannin-Based Resin |
| title_fullStr | Preparation and Characterization of Soybean Protein Adhesives Modified with an Environmental-Friendly Tannin-Based Resin |
| title_full_unstemmed | Preparation and Characterization of Soybean Protein Adhesives Modified with an Environmental-Friendly Tannin-Based Resin |
| title_short | Preparation and Characterization of Soybean Protein Adhesives Modified with an Environmental-Friendly Tannin-Based Resin |
| title_sort | preparation and characterization of soybean protein adhesives modified with an environmental friendly tannin based resin |
| topic | tannin adhesive soybean protein plywood wet shear strength |
| url | https://www.mdpi.com/2073-4360/15/10/2289 |
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