Mechanical Properties of a Soy Protein Isolate–Grafted–Acrylate (SGA) Copolymer Used for Wood Coatings
Changing demands have led to rapidly growing interest in the modification of waterborne wood coatings. To improve the performance of a polyacrylate wood coating, especially the strength, hardness, and abrasion resistance of the film, a soy protein isolate–grafted–acrylate (SGA) copolymer was prepare...
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doaj-fa25b698f28e450b91b2932b2c1315782020-11-25T02:11:03ZengMDPI AGPolymers2073-43602020-05-01121137113710.3390/polym12051137Mechanical Properties of a Soy Protein Isolate–Grafted–Acrylate (SGA) Copolymer Used for Wood CoatingsBin Feng0Di Wang1Yuhui Li2Junpeng Qian3Chenlei Yu4Mingsi Wang5Danni Luo6Shuangying Wei7College of Material Science and Engineering, Northeast Forestry University, Harbin 150040, ChinaCollege of Material Science and Engineering, Northeast Forestry University, Harbin 150040, ChinaCollege of Material Science and Engineering, Northeast Forestry University, Harbin 150040, ChinaCollege of Material Science and Engineering, Northeast Forestry University, Harbin 150040, ChinaCollege of Material Science and Engineering, Northeast Forestry University, Harbin 150040, ChinaCollege of Material Science and Engineering, Northeast Forestry University, Harbin 150040, ChinaCollege of Material Science and Engineering, Northeast Forestry University, Harbin 150040, ChinaCollege of Material Science and Engineering, Northeast Forestry University, Harbin 150040, ChinaChanging demands have led to rapidly growing interest in the modification of waterborne wood coatings. To improve the performance of a polyacrylate wood coating, especially the strength, hardness, and abrasion resistance of the film, a soy protein isolate–grafted–acrylate (SGA) copolymer was prepared in an aqueous solution with ammonium persulfate (APS) as an initiator and sodium pyrosulfite (SPS) as an unfolding agent for the soybean protein isolate (SPI). The emulsion was characterized using transmission electron microscopy, Fourier-transform infrared spectroscopy (FTIR), and a particle size analyzer. Furthermore, the mechanical properties of the film, including the tensile strength, elastic modulus, elongation at break, and pencil hardness, were measured. The results showed that the glass transition temperature of the polyacrylic resin decreased to 35 °C after the SPI grafting. The elastic modulus of the film increased from 0.317 to 46.949 MPa, and the elongation at break decreased from 453.133% to 187.125% as the addition of SPI varied from 0 to 4 g, respectively. The pencil hardness of the wood coating increased from HB to 3H. This paper proposes a feasible route for the utilization of SPI for wood coatings.https://www.mdpi.com/2073-4360/12/5/1137soy protein isolatepolyacrylategraft copolymerizationwaterborne wood coating |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Bin Feng Di Wang Yuhui Li Junpeng Qian Chenlei Yu Mingsi Wang Danni Luo Shuangying Wei |
spellingShingle |
Bin Feng Di Wang Yuhui Li Junpeng Qian Chenlei Yu Mingsi Wang Danni Luo Shuangying Wei Mechanical Properties of a Soy Protein Isolate–Grafted–Acrylate (SGA) Copolymer Used for Wood Coatings Polymers soy protein isolate polyacrylate graft copolymerization waterborne wood coating |
author_facet |
Bin Feng Di Wang Yuhui Li Junpeng Qian Chenlei Yu Mingsi Wang Danni Luo Shuangying Wei |
author_sort |
Bin Feng |
title |
Mechanical Properties of a Soy Protein Isolate–Grafted–Acrylate (SGA) Copolymer Used for Wood Coatings |
title_short |
Mechanical Properties of a Soy Protein Isolate–Grafted–Acrylate (SGA) Copolymer Used for Wood Coatings |
title_full |
Mechanical Properties of a Soy Protein Isolate–Grafted–Acrylate (SGA) Copolymer Used for Wood Coatings |
title_fullStr |
Mechanical Properties of a Soy Protein Isolate–Grafted–Acrylate (SGA) Copolymer Used for Wood Coatings |
title_full_unstemmed |
Mechanical Properties of a Soy Protein Isolate–Grafted–Acrylate (SGA) Copolymer Used for Wood Coatings |
title_sort |
mechanical properties of a soy protein isolate–grafted–acrylate (sga) copolymer used for wood coatings |
publisher |
MDPI AG |
series |
Polymers |
issn |
2073-4360 |
publishDate |
2020-05-01 |
description |
Changing demands have led to rapidly growing interest in the modification of waterborne wood coatings. To improve the performance of a polyacrylate wood coating, especially the strength, hardness, and abrasion resistance of the film, a soy protein isolate–grafted–acrylate (SGA) copolymer was prepared in an aqueous solution with ammonium persulfate (APS) as an initiator and sodium pyrosulfite (SPS) as an unfolding agent for the soybean protein isolate (SPI). The emulsion was characterized using transmission electron microscopy, Fourier-transform infrared spectroscopy (FTIR), and a particle size analyzer. Furthermore, the mechanical properties of the film, including the tensile strength, elastic modulus, elongation at break, and pencil hardness, were measured. The results showed that the glass transition temperature of the polyacrylic resin decreased to 35 °C after the SPI grafting. The elastic modulus of the film increased from 0.317 to 46.949 MPa, and the elongation at break decreased from 453.133% to 187.125% as the addition of SPI varied from 0 to 4 g, respectively. The pencil hardness of the wood coating increased from HB to 3H. This paper proposes a feasible route for the utilization of SPI for wood coatings. |
topic |
soy protein isolate polyacrylate graft copolymerization waterborne wood coating |
url |
https://www.mdpi.com/2073-4360/12/5/1137 |
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