@Article{jrm.2022.020459,
AUTHOR = {Pengfei Guan, Ping Li, Yiqiang Wu, Xingong Li, Guangming Yuan, Yingfeng Zuo},
TITLE = {Comparative Study on the Properties of Inorganic Silicate and Organic Phenolic Prepolymer Modified Poplar Wood by Vacuum Cycle Pressurization},
JOURNAL = {Journal of Renewable Materials},
VOLUME = {10},
YEAR = {2022},
NUMBER = {9},
PAGES = {2451--2463},
URL = {http://www.techscience.com/jrm/v10n9/48019},
ISSN = {2164-6341},
ABSTRACT = {To enhance mechanical properties and improve flame retardancy and smoke suppression of fast-growing poplar
wood in wood applications, the wood was impregnated and modified. An organic phenolic prepolymer and inorganic sodium silicate was used as contrasting impregnation modifiers and wood samples were impregnated by a
bionic “respiration” method with alternating positive and negative pressure. The weight percentage gain, density
increase ratio, mechanical properties (bending and compressive strength and hardness), and water absorption rate
of inorganic and organic-impregnated modified poplar wood (IIMPW and OIMPW, respectively) were compared
and these properties in IIMPW were found to be higher than those of OIMPW with the exception of the water
absorption rate which was lower than the OIMPW. This was attributed to the superior absorption of sodium silicate that also improved the impregnation, reinforcement, and dimensional stability in the IIMPW. The chemical
structure, crystalline structure, internal morphology, flame retardancy, smoke suppression, and thermal stability
of IIMPW and OIMPW were characterized by FT-IR, XRD, SEM, CONE, and TGA. FT-IR and XRD results
showed that, although IIMPW cellulose crystallinity reduced the most, more chemical bonds were come into
being in IIMPW, which explained the better physical and mechanical properties of IIMPW. Compared with
OIMPW, IIMPW had better flame retardant and smoke suppression performance.},
DOI = {10.32604/jrm.2022.020459}
}