Investigation of Synthesis Mechanism, Optimal Hot-Pressing Conditions, and Curing Behavior of Sucrose and Ammonium Dihydrogen Phosphate Adhesive | Zendy

Zhongyuan Zhao | Zendy; Shunsuke Sakai | Zendy; Di Wu | Zendy; Zhen Chen | Zendy; Nan Zhu | Zendy; Chengsheng Gui | Zendy; Min Zhang | Zendy; Kenji Umemura | Zendy; Qiang Yong | Zendy

Open Access

Investigation of Synthesis Mechanism, Optimal Hot-Pressing Conditions, and Curing Behavior of Sucrose and Ammonium Dihydrogen Phosphate Adhesive

Author(s) -

Zhongyuan Zhao,

Shunsuke Sakai,

Di Wu,

Zhen Chen,

Nan Zhu,

Chengsheng Gui,

Min Zhang,

Kenji Umemura,

Qiang Yong

Publication year - 2020

Publication title -

polymers

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.77

H-Index - 73

ISSN - 2073-4360

DOI - 10.3390/polym12010216

Subject(s) - adhesive , ammonium dihydrogen phosphate , curing (chemistry) , materials science , ammonium phosphate , fourier transform infrared spectroscopy , hot pressing , pyrolysis , infrared spectroscopy , nuclear chemistry , composite material , chemical engineering , chemistry , organic chemistry , raw material , fertilizer , layer (electronics) , engineering

In this study, a further investigation was carried out on the synthesis mechanism, optimal manufacturing conditions, and curing behavior of a sucrose-ammonium dihydrogen phosphate (SADP) adhesive. The results of 13 C nuclear magnetic resonance (NMR) spectroscopy confirmed that SADP was composed of 5-hydroxymethylfurfural (5-HMF), deoxyfructosazine (DOF), amino compounds, Schiff base, monosaccharides, and oligosaccharide. The optimal hot-pressing conditions were a hot-pressing temperature of 170 °C, a hot-pressing time of 7 min, and a spread rate of 120 g/m 2 . The wet shear strength of plywood bonded at optimal manufacturing conditions met the requirements of China National Standard (GB/T 9846-2015). Thermal analysis and insoluble mass proportion measurements showed that the main curing behavior of the SADP adhesive occurred at curing temperatures higher than 145 °C, and more than 50% insoluble mass was formed when the heating time was longer than 5 min. Fourier-transform infrared spectroscopy (FT-IR) indicated that cross-linking of the cured adhesive was promoted by prolonging the heating time. In addition, pyrolysis gas chromatography and mass spectrometry (Py-GC/MS) confirmed that the cured SADP adhesive was composed of furan and nitrogen-containing compounds.

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