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Kenji Umemura
Kyoto University
Composite materialOrganic chemistryMaterials scienceCitric acidAdhesive
102Publications
23H-index
1,843Citations
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Publications 104
Newest
#1Hideaki Sugino (Kyoto University)H-Index: 1
#2Soichi Tanaka (Kyoto University)H-Index: 4
Last. Kozo Kanayama (Kyoto University)H-Index: 10
view all 8 authors...
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The effective utilization of agricultural residues is desirable. In this study, the manufacturing of moldings using sweet sorghum bagasse powder and citric acid as an adhesive was attempted. The ef...
#1Shohei Kajikawa (University of Electro-Communications)H-Index: 3
#2Masaya Horikoshi (University of Electro-Communications)
Last. Kozo Kanayama (Kyoto University)H-Index: 10
view all 6 authors...
Thermal flow molding of wood powder was carried out with a natural binder consisting of sucrose and citric acid (SC binder) for fabricating wood products without synthetic resins. The testing of thermal flow and molding of the wood powder with SC binder was done to analyze the effect of added SC binder, as well as to optimize the molding conditions, such as temperature, binder content, and mixture ratio of the sucrose and citric acid. The wood powder with SC binder flowed successfully at an opti...
#1Zhongyuan Zhao (NFU: Nanjing Forestry University)H-Index: 4
#1Zhongyuan ZhaoH-Index: 15
Last. Qiang YongH-Index: 1
view all 9 authors...
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 13C 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 °...
3 CitationsSource
#1Cihat Tascioglu (Düzce University)H-Index: 12
#2Kenji Umemura (Kyoto University)H-Index: 23
Last. Tsuyoshi Yoshimura (Kyoto University)H-Index: 19
view all 7 authors...
The efficacy of particleboards manufactured with sodium fluoride against mold fungi and Hylotrupes bajulus (L.) larvae was tested. Laboratory-size particleboards were manufactured from untreated wood particles with inclusion of fine sodium fluoride (NaF) at the 1, 1.5, and 3% levels relative to total particle weight. Sodium fluoride was introduced as powder during the manufacturing process just before blending resin with wood particles. The laboratory mold test indicated that even the lowest lev...
#1Shijing SunH-Index: 2
#2Min Zhang (Kyoto University)H-Index: 3
Last. Zhongyuan ZhaoH-Index: 15
view all 4 authors...
Sucrose is one of the most abundantly available renewable chemicals in the world, and it is expected to be utilized as a raw material for wood-based material products. Herein, a novel adhesion system that was based on sucrose and ammonium dihydrogen phosphate (ADP) was synthesized into an adhesive with 80% solid content, and this eco-friendly was utilized on the fabrication of plywood. The effects of the synthesis conditions on the plywood bond performance and synthesis mechanism were investigat...
3 CitationsSource
#1Zhongyuan Zhao (NFU: Nanjing Forestry University)H-Index: 4
#1Zhongyuan ZhaoH-Index: 15
Last. Qiang YongH-Index: 1
view all 10 authors...
In previous research, sucrose and citric acid were used to synthesize an eco-friendly plywood adhesive. Herein, further research was performed to determine the optimal hot-pressing conditions and curing behavior of a sucrose-citric acid (SC) adhesive. The results of dry and wet shear strength measurements showed that the optimal hot-pressing temperature, hot-pressing time, and spread rate of plywood samples bonded by the SC adhesive were 190 °C, 7 min, and 140 g/m2, respectively. When plywood wa...
3 CitationsSource
#1Soichi Tanaka (Kyoto University)H-Index: 4
#2Masako Seki (AIST: National Institute of Advanced Industrial Science and Technology)H-Index: 4
Last. Kozo Kanayama (Kyoto University)H-Index: 10
view all 5 authors...
The purpose of this paper was to confirm the influence of pulsive pressure waves on the liquid penetration into wood in the semi-opened container. Wood block sample was irradiated by the pulsive pressure waves in the semi-opened container filled with water used as a liquid. The irradiation was also performed in the closed container for the comparison. The water penetration into the sample was promoted by the pressure-wave irradiation. There was little difference in the degree of the penetration ...
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#1Rahma Nur Komariah (Kyoto University)
#2Takuji Miyamoto (Kyoto University)H-Index: 4
Last. Kenji Umemura (Kyoto University)H-Index: 23
view all 9 authors...
Abstract The inner part (i.e., two-thirds of the diameter) of oil palm trunk (OPT) generally becomes waste because of its insufficient properties (e.g., low strength, low durability). Herein we attempted to use the inner part of OPT as a raw material of binderless particleboard in order to change this waste into an environmentally friendly value-added product. In this study, ammonium dihydrogen phosphate (ADP) was used as an additive, and the effect of ADP additions on the properties of particle...
Source
#1Zhongyuan Zhao (NFU: Nanjing Forestry University)H-Index: 4
#1Zhongyuan ZhaoH-Index: 15
Last. Qiang YongH-Index: 1
view all 7 authors...
The development of eco-friendly adhesives for wood composite products has been a major topic in the field of wood science and product engineering. Although the research on tannin-based and soybean protein-based adhesives has already reached, or at least nears, industrial implementation, we also face a variety of remaining challenges with regards to the push for sustainable adhesives. First, petroleum-derived substances remain a pre-requisite for utilization of said adhesive systems, and also the...
7 CitationsSource
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