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Positive impact of carbohydrate on the crosslinking, performance, and potential applications of defatted soybean flour-based adhesive
International Journal of Adhesion and Adhesives ( IF 3.4 ) Pub Date : 2021-01-08 , DOI: 10.1016/j.ijadhadh.2021.102811
Yan Mi , Zongxing Sun , Daqian Gao , Yumei Bai , Zhenhua Gao

Defatted soybean flour (DSF)-based adhesive has been successfully commercialized owing to its acceptable performance, formaldehyde-free formulation, and derivation from a biological resource. However, obscurity of the effects of DSF components on adhesive performance limits its wider commercial applications. In this study, a soybean protein isolate (SPI) and a soybean polysaccharides (SPSs) were constructed to simulate DSF and allow investigations into these components’ contributions to the crosslinking characteristics and performances of DSF-based adhesive. Results from the sol-gel test, Fourier-transform infrared spectroscopy (FTIR), and 13C nuclear magnetic resonance (NMR) confirmed that the SPI and SPS mixtures reasonably simulated DSF function proportional to their contribution to DSF content and revealed that carbohydrates in DSF can be crosslinked by the crosslinker epichlorohydrin-modified polyamide (EMPA). FTIR results, rheological analyses, and bond property evaluations confirmed that reduction of SPI reactivity by carbohydrates effectively reduced apparent viscosity and crosslinking rates at room temperature and was therefore beneficial for technological applicability but may negatively impact the bonding properties of DSF-based adhesives. These results suggest that 10%–30% carbohydrate-rich wheat flour can be introduced into DSF-based adhesives to improve their technological applicability, reduce the cost, and provide instructive information for tailoring the formulation of DSF-based adhesives according to desired applications.



中文翻译:

碳水化合物对脱脂大豆粉基胶粘剂的交联,性能和潜在应用的积极影响

基于脱脂大豆粉(DSF)的胶粘剂由于其可接受的性能,无甲醛配方和源自生物资源而成功地商业化。但是,对DSF组分对胶粘剂性能影响的模糊性限制了其在商业上的广泛应用。在这项研究中,构建了大豆分离蛋白(SPI)和大豆多糖(SPS)来模拟DSF,并允许研究这些组分对基于DSF的胶粘剂的交联特性和性能的贡献。溶胶-凝胶测试,傅立叶变换红外光谱(FTIR)的结果,13C核磁共振(NMR)证实SPI和SPS混合物合理模拟了DSF的功能,与它们对DSF含量的贡献成正比,并揭示了DSF中的碳水化合物可以通过交联剂表氯醇改性的聚酰胺(EMPA)进行交联。FTIR结果,流变分析和键合性能评估证实,碳水化合物降低SPI反应性可有效降低室温下的表观粘度和交联速率,因此有利于技术应用,但可能会对基于DSF的胶粘剂的粘合性能产生负面影响。这些结果表明,可以将10%–30%的富含碳水化合物的小麦粉引入基于DSF的胶粘剂中,以提高其技术适用性,降低成本,

更新日期:2021-01-12
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