@article {1864,
	title = { Effects of Broussonetiapapyrifera leaf cutting modes on bonding performance of its protein-based adhesives },
	journal = { EUROPEAN JOURNAL OF WOOD AND WOOD PRODUCTS },
	volume = {78},
	year = {2020},
	pages = {461-470},
	abstract = {<p>Broussonetiapapyrifera leaf protein was used as a biomass feedstock to prepare wood adhesives, and the influence of cutting modes (cutting frequencies and cutting heights) on leaf protein content and reactivity was studied in this paper. Bonding performance of Broussonetiapapyrifera leaf protein-based adhesives were evaluated by shear strength of plywood. Fourier transform infrared spectroscopy (FTIR), differential scanning calorimetry (DSC), thermogravimetry (TG), and scanning electron microscope (SEM) were used to analyze them. The results indicated that: (1) the leaf protein content gradually increased as the cutting height increased, but it presented a decreasing trend as the cutting frequency increased. When the cutting frequency is two times per year and the cutting height is 30 cm, this leaf protein-based adhesive exhibited the best bonding strength with 0.75 MPa. (2) Cutting frequency and cutting height have no significant correlations to the reactivity of leaf protein with the crosslinker. (3) DSC and FTIR indicated that both leaf protein content and reactivity appeared to exert an influence on the bonding properties of the protein adhesives, and the latter is more pronounced. (4) TG and SEM analyses indicated that under different cutting modes, leaf protein content, especially protein reactivity, had a great effect on the thermal properties of the adhesives. (5) Contact angle analysis showed that Broussonetiapapyrifera leaf protein-based adhesives had good wettability on wood surfaces. Under different cutting modes with the difference of leaf protein content and reactivity, the crosslinking degree of the adhesives with crosslinker and compactness of the cured adhesives were different and thus affect their bonding strength and water resistance.</p>},
	author = {Z.G. WU and X.D. XI and A. PIZZI and Y.F. XIA and Q.X. ZHAO and H. LEI and J.K. LIANG}
}
