Effect of buffers on gypsum particleboard properties

2001 ◽  
Vol 47 (5) ◽  
pp. 356-361 ◽  
Author(s):  
Yu-He Deng ◽  
Takeshi Furuno ◽  
Yu-Fei Wu
Keyword(s):  
Gypsum Particleboard ◽  
Particleboard Properties

Effect of a waterproof agent on gypsum particleboard properties

Holzforschung ◽  
2006 ◽  
Vol 60 (3) ◽  
pp. 318-321 ◽  
Author(s):  
Yuhe Deng ◽  
Ling Xuan ◽  
Qian Feng
Keyword(s):  
Crystal Size ◽  
Property Values ◽  
Modulus Of Rupture ◽  
Test Results ◽  
Control Board ◽  
X Ray Diffraction ◽  
Thickness Swelling ◽  
X Ray ◽  
Negative Effect ◽  
Gypsum Particleboard

Abstract This paper describes the influence of the addition of an organosilicon waterproof agent on the properties of gypsum particleboard (GPB). Test results showed that the additive at an appropriate concentration reduces the thickness swelling (TS) and water absorption (WA), and increases the mechanical properties. TS was lowered to ∼1.6% and internal bond strength (IB) was increased to ∼0.4 MPa when 3% organosilicon agent was added. Accordingly, the TS was reduced by 53% and the IB increased by 45% relative to control board without additives. The modulus of rupture (MOR) and modulus of elasticity (MOE) were also increased in the presence of the organosilicon waterproof agent. The effect was pronounced for MOR. On the other hand, too high a content of organosilicon additive had a negative effect and the corresponding property values were poorer. X-Ray diffraction revealed that the content of gypsum dihydrate increased in the presence of the additive, but other chemical changes were not observed. Scanning electron microscopy (SEM) confirmed that the crystal size in gypsum was reduced is the presence of the additive.

Observation and analysis of gypsum particleboard using SEM

2007 ◽  
Vol 22 (1) ◽  
pp. 44-47 ◽  
Author(s):  
Qian Feng ◽  
Yuhe Deng ◽  
Hyunjoong Kim ◽  
Wen Lei ◽  
Zhiwu Sun ◽  
...  
Keyword(s):  
Gypsum Particleboard

scholarly journals Effect of hot water extracted hardwood and softwood chips on particleboard properties

Holzforschung ◽  
2014 ◽  
Vol 68 (7) ◽  
pp. 807-815 ◽  
Author(s):  
Manuel Raul Pelaez-Samaniego ◽  
Vikram Yadama ◽  
Tsai Garcia-Perez ◽  
Eini Lowell ◽  
Thomas Amidon
Keyword(s):  
Mechanical Properties ◽  
Liquid Fraction ◽  
Hot Water ◽  
Hydroxyl Groups ◽  
Moisture Uptake ◽  
Thickness Swelling ◽  
Hot Water Extraction ◽  
Hemicellulose Removal ◽  
Wood Resistance ◽  
Particleboard Properties

Abstract The affinity of particleboard (PB) to water is one of the main limitations for using PB in moisture-rich environments. PB dimensional stability and durability can be improved by reducing the available hydroxyl groups in wood through hemicellulose removal, for example, by hot water extraction (HWE), which increases wood resistance to moisture uptake. The resulting liquid fraction from HWE is rich in hemicelluloses and can be used for chemicals and fuels, and the solid fraction is less hydrophilic. The objective of this study was to investigate the effects of HWE of softwood chips (conducted at 160°C and 90 min) and hardwood chips (160°C and 120 min) on the properties of PB panels. HWE increased compressibility and reduced springback by 34% and 44% for pine and maple chips, respectively, which positively impacted the PB properties. Water absorption of pine PB panels was lowered by 35% and that of maple PB panels by 30%, while reduction of thickness swelling was lowered by 39% for pine PB and 56% for maple PB after 24 h of immersion in water. The mechanical properties were not significantly affected.

Evaluating the flammability of wood-based panels and gypsum particleboard using a cone calorimeter

2011 ◽  
Vol 25 (7) ◽  
pp. 3044-3050 ◽  
Author(s):  
Byoung-Ho Lee ◽  
Hee-Soo Kim ◽  
Sumin Kim ◽  
Hyun-Joong Kim ◽  
Bongwoo Lee ◽  
...  
Keyword(s):  
Cone Calorimeter ◽  
Gypsum Particleboard

Mechanical properties of nano SiO2 filled gypsum particleboard

2006 ◽  
Vol 16 ◽  
pp. s361-s364 ◽  
Author(s):  
Wen LEI ◽  
Yu-he DENG ◽  
Mei ZHOU ◽  
Ling XUAN ◽  
Qian FENG
Keyword(s):  
Mechanical Properties ◽  
Nano Sio2 ◽  
Gypsum Particleboard

Properties of gypsum particleboard reinforced with polypropylene fibers

2001 ◽  
Vol 47 (6) ◽  
pp. 445-450 ◽  
Author(s):  
Yu-He Deng ◽  
Takeshi Furuno
Keyword(s):  
Polypropylene Fibers ◽  
Gypsum Particleboard
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