Rheology of moso bamboo stem determined by DMA in ethylene glycol
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Fangli Sun
Abstract
The basic properties of moso bamboo (MB) were determined according to the International Organization for Standardization (ISO) standards and its rheological behavior was studied by dynamic mechanical analysis (DMA) in the tensile torsion stress mode after plasticization with ethylene glycol (EG). Results show that the density and the apparent lignin content of MB increases and the degree of crystallinity decreases with increasing age. Storage modulus (G′) increases from 1- to 3-year-old MB, and then decreases again with age. When the bamboo culm with the inner and outer surface planed off was divided into three layers in the radial direction, the G′ of the outer layer was always higher than that of the middle and inner layers. The glass transition temperature (Tg) of MB plasticized with EG is about 10°C lower than the water plasticized ones, and the Tg of the outer and inner layers was nearly 1–2°C higher than that of the middle layer. The overall trend of basic properties and rheological behaviors seems to exhibit a discontinuity at 3 years, which might reflect the growth of MB and mainly the thickening of cell walls.
Funding source: National Natural Science Foundation of China
Award Identifier / Grant number: 31470587
Funding statement: The authors thank the National Natural Science Foundation of China for funding the project (31470587) and Key Natural Science Foundation of Zhejiang Province (LZ14C160002). Partial support was provided by the Wood-Based Composites center, a National Science Foundation Industry/University Cooperative Research Center (Award #1035009). Partial funding was also provided by the Virginia Agricultural Experiment Station and the McIntire Stennis Program of the National Institute of Food and Agriculture, U.S. Department of Agriculture.
Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.
Employment or leadership: None declared.
Honorarium: None declared.
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©2019 Walter de Gruyter GmbH, Berlin/Boston
Articles in the same Issue
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Articles in the same Issue
- Frontmatter
- Original Articles
- Cutting forces and chip formation revisited based on orthogonal cutting of Scots pine
- Predicting structural timber grade-determining properties using acoustic and density measurements on young Sitka spruce trees and logs
- Natural resistance of eight Brazilian wood species from the region Caatinga determined by an accelerated laboratory decay test against four fungi
- Understanding the effect of weathering on adhesive bonds for wood composites using digital image correlation (DIC)
- Time-dependent ammonia emissions from fumed oak wood determined by micro-chamber/thermal extractor (μCTE) and FTIR-ATR spectroscopy
- Rheology of moso bamboo stem determined by DMA in ethylene glycol
- Carbon nanomaterials based on interpolyelectrolyte complex lignosulfonate-chitosan
- Radical transfer system in the enzymatic dehydrogenative polymerization (DHP formation) of coniferyl alcohol (CA) and three dilignols
- The gene expression and enzymatic activity of pinoresinol-lariciresinol reductase during wood formation in Taiwania cryptomerioides Hayata
- Applicability of chloroplast DNA barcodes for wood identification between Santalum album and its adulterants
- Short Note
- Strength and stiffness of the reaction wood in five Eucalyptus species
