@Article{jrm.2020.011788,
AUTHOR = {Yuan Zhang, Ping Li, Yiqiang Wu, Guangming Yuan, Xianjun Li, Yingfeng Zuo},
TITLE = {Preparation and Characterization of Phenolic Prepolymer Impregnated Chinese Fir by Cyclic Increasing-Pressure Method with Green and Efficient},
JOURNAL = {Journal of Renewable Materials},
VOLUME = {8},
YEAR = {2020},
NUMBER = {11},
PAGES = {1473--1488},
URL = {http://www.techscience.com/jrm/v8n11/40265},
ISSN = {2164-6341},
ABSTRACT = {The Chinese fir wood was impregnated using a cyclic increasingpressure method (CIPM) with phenolic prepolymers as the impregnating modifier.
Unmodified Chinese fir and progressive increasing-pressure method (PIPM)
impregnated Chinese fir were used as reference samples and were compared and
analyzed. The product’s chemical structure, internal morphology, crystal structure,
and heat resistance were characterized. The transversal and longitudinal sections
showed better filling effects, so that it bore greater external loading and reduced
the water storage space. CIPM infused more phenolic prepolymer into the Chinese
fir. Not only producing more physical filling but also forming more hydrogen bond
associations and chemical bond combinations. Compared with PIPM and unmodi-
fied Chinese fir, the CIPM impregnated Chinese fir had better mechanical strength
and water resistance. The cellulose chains in CIPM impregnated Chinese fir were
more closely linked and their crystallinity were clearly improved. Changes in
internal morphology and crystal structure explained the reason why the mechanical
properties and water resistance of CIPM impregnated Chinese fir were improved
significantly. This Chinese fir had lower thermal decomposition rates, higher
decomposition residual rates, and smaller combustion flames, which confirmed that
it possessed improved heat and fire resistance.},
DOI = {10.32604/jrm.2020.011788}
}