Properties of Thermally Treated Yellow Poplar, Southern Pine, and Eastern Redcedar

Selected Physical and Mechanical Properties of Microwave Heat Treated Rubberwood (Hevea brasiliensis)

“…Therefore any wood products exposed to heat treatment will have lower mechanical properties including modulus of elasticity and modulus of rupture. Negative effect of heat treatment on mechanical properties of wood has been studies in past investigations and the decrease of hemicelluloses was determined as the major reason for such reduction [4,16,18,19]. When flexible bonding between cellulose and hemicelluloses is replaced and left only rigid cellulose bonds, flexibility of the products is simply decreases [4,20].…”

“…Discoloration in the form of being darker is also one of the results of heat treatment of wood. Naturally, this characteristic is more prominent in the case of light color species such as pine or yellow poplar [18]. Degradation of hemicelluloses and extractive content in wood are main parameters influencing discoloration of the member during heat treatment process [21,22].…”

“…Degradation of hemicelluloses and extractive content in wood are main parameters influencing discoloration of the member during heat treatment process [21,22]. In a past study yellow poplar, eastern redcedar and southern pine samples exposed to temperature levels of 130 • C, 160 • C, and 190 • C had average lightness values ranging from 32.82 to 68.75 [18].…”

Shear strength and hardness of two tropical wood species as function of heat treatment

“…It appears that the overall surface roughness of the samples from both species did not show any significant change when they were exposed to a temperature of 120 ºC for both 3 h and 6 h time exposure as can be seen in Table 1. In a previous study surface roughness of yellow poplar, southern pine and eastern red cedar samples exposed to a temperature of 130 ºC also did not have a noticeable difference in R a values as compared to those of the control specimens (Ulker et al 2018). According to Shukla (2019), the surface roughness value can be affected by the increasing treatment temperature and duration.…”

Evaluation of the properties of hybrid yellow poplar (Liriodendron sino-americanum): A comparison study with yellow poplar (Liriodendron tulipifera)

“…With the decrease of natural wood resources and increase in wood demand in China (Dai et al 2018), the fast-growth wood species has attracted attention where the potential applications and favorable performance of wood products were achieved when the natural wood was replaced by fast-growth wood (Chen et al 2020b). As one of the fast-growth wood species, yellow poplar (Liriodendron tulipifera) originated from eastern North America (Wang 2005, Xu et al 2010, has been extensively used in construction (Jennings et al 2006, Zink-Sharp and Price 2006, Ulker et al 2018, furniture (Salca and Hiziroglu 2014), biomass (Kim et al 2012a, Na et al 2015, Kim and Lee 2019, bio-oil (Kim et al 2012b), wood-based panel Lee 2003, Shukla andKamdem 2009), and nanofibers (Wang et al 2020). Generally, yellow poplar needs to be physically or chemically modified to meet the application requirements, due to its disadvantages of low-density, soft, weak, and hygroscopicity (Celen et al 2008, Chowdhury and Frazier 2013, Salca and Hiziroglu 2014, Kim and Lee 2019.…”