scholarly journals Author Correction: Effect of Hygrothermal Treatment on the Porous Structure and Nanomechanics of Moso Bamboo

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Cuiyin Ye ◽  
Yanhui Huang ◽  
Qiming Feng ◽  
Benhua Fei
Keyword(s):  
Porous Structure ◽  
Moso Bamboo ◽  
Correction Effect ◽  
Hygrothermal Treatment

An amendment to this paper has been published and can be accessed via a link at the top of the paper.

scholarly journals Effect of Hygrothermal Treatment on the Porous Structure and Nanomechanics of Moso Bamboo

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Cuiyin Ye ◽  
Yanhui Huang ◽  
Qiming Feng ◽  
Benhua Fei
Keyword(s):  
Total Pore Volume ◽  
Nitrogen Adsorption ◽  
Treatment Temperature ◽  
Moso Bamboo ◽  
X Ray Diffraction ◽  
Average Pore ◽  
X Ray ◽  
Modification Method ◽  
Hygrothermal Treatment ◽  
Control Samples

Abstract Hygrothermal treatment is an environmentally friendly and efficient modification method. In this study, Moso bamboo was modified with hygrothermal treatments, and the results of nitrogen adsorption, X-ray diffraction (XRD), scanning electron microscopy (SEM) and nano indentation (NI) were then examined. Interestingly, the samples that underwent hygrothermal treatment at 180 °C and 100% RH (relative humidity) had the highest crystallinity (36.92%), which was 11.07% statistically larger than that of the control samples. Simultaneously, the total pore volume and average pore diameter (2.72 nm) dramatically decreased by 38.2% and 43.7%, respectively. The NI elasticity and hardness of the samples also reached the highest values under this condition; both increased by nearly 21% as compared with the control samples. Therefore, 180 °C is a favorable hygrothermal treatment temperature for Moso bamboo modification due to the porosity changes and the improvement of the nanomechanics of the cell walls.

Impact of hygrothermal treatment on the physical properties and chemical composition of Moso bamboo (Phyllostachys edulis)

Holzforschung ◽  
2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Qiming Feng ◽  
Yanhui Huang ◽  
Cuiyin Ye ◽  
Benhua Fei ◽  
Shumin Yang
Keyword(s):  
Dimensional Stability ◽  
Cell Walls ◽  
Fold Increase ◽  
Moso Bamboo ◽  
Phyllostachys Edulis ◽  
Dense Structure ◽  
Parenchyma Cells ◽  
Different Temperatures ◽  
Environmentally Friendly Approach ◽  
Hygrothermal Treatment

AbstractNatural bamboo is rapidly replacing wood, but it is highly hygroscopic and has poor dimensional stability. Herein, Moso bamboo was subjected to hygrothermal treatment at different temperatures. The hydrophobicity and dimensional stability of bamboo increased, as indicated by the 16.5% decrease in volumetric swelling and three-fold increase in the contact angle at 220 °C. The fibers and parenchyma cells delaminated, and pores appeared after treatment at 200 °C. These changes were attributed to the significant degradation of hemicelluloses. The acetyl groups of hemicelluloses decomposed into acetic acid. The apparent crystallinity of cellulose increased mainly due to the reduced hemicellulose content. Furthermore, a breakage of xylan and β-O-4 bonds was observed, and S units were condensed after treatment at 220 °C. In addition, the syringyl/guaiacyl ratio showed more than a five-fold increase, while associated ferulic acid decreased after hygrothermal treatment, indicating that the dense structure of the cell walls was broken. These data were used to propose a mechanism for changes in the bamboo cell walls during hygrothermal treatment. This simple and environmentally-friendly approach holds great potential for use in high-humidity environments.

PAPER PHYSICS. The web structure in relation to the furnish composition and shoe press pulse profiles during wet pressing

2012 ◽  
Vol 27 (4) ◽  
pp. 798-805 ◽  
Author(s):  
Collin Hii ◽  
Øyvind W. Gregersen ◽  
Gary Chinga-Carrasco ◽  
Øyvind Eriksen ◽  
Kai Toven
Keyword(s):  
Porous Structure ◽  
Peak Pressure ◽  
Pulse Length ◽  
Pressure Profile ◽  
Steam Consumption ◽  
Web Structure ◽  
Wet Pressing ◽  
Solids Content ◽  
In The Beginning ◽  
The Web

Abstract This study shows that wet-pressing TMP and DIP with a shoe press pulse may yield similar afterpress solids, provided that an adequate shoe pulse length with similar pressure profile is applied. A wet web with more porous structure in the sheet dewatering (felt) layer seems to contribute to the increased dewatering during wet pressing. In addition, a shoe press pulse with high peak pressure at the end yields higher solids content after wet-pressing and higher bulk compared to a pulse with a peak pressure in the beginning. The increased dewatering during wet-pressing implies a reduction of steam consumption in the dryer.

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