Abstract
Wood flour (WF) was modified with sodium-montmorillonite (Na-MMT) and didecyl dimethyl ammonium chloride (DDAC) to form an organo-montmorillonite (OMMT) inside WF at different OMMT concentrations from 0.25 to 1%. The modified WF was blended with polypropylene (PP) to produce PP/WF composites at a weight ratio of 1:1 by compression molding. The composites were immersed in water and their stress relaxation behaviors were investigated at 26, 40, and 60°C, respectively. Results: (1) All composites show stress relaxation with increasing compression testing time, indicating that they have pronounced rheological properties. (2) The stress relaxation becomes more severe with increasing temperature and water immersion time. (3) OMMT improves the stiffness of the composites with slower stress relaxation, and the PP/WF0.5% OMMT seems to perform best among all.
Acknowledgment
This study was financially supported by the Fundamental Research Funds for the central Universities of China (No. 2015ZCQ-CL-01).
References
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©2017 Walter de Gruyter GmbH, Berlin/Boston
Articles in the same Issue
- Frontmatter
- Original Articles
- Effects of hot water extraction (HWE) of Douglas fir as a pre-process for the sulfite pretreatment to overcome recalcitrance of lignocellulose (SPORL)
- Structural characteristics of milled wood lignin (MWL) isolated from green liquor (GL) pretreated poplar (Populus deltoides)
- TEMPO-mediated electro-oxidation reactions of non-phenolic β-O-4-type lignin model compounds
- Microstructure of chemically modified wood using X-ray computed tomography in relation to wetting properties
- The effects of thermal treatment on the nanomechanical behavior of bamboo (Phyllostachys pubescens Mazel ex H. de Lehaie) cell walls observed by nanoindentation, XRD, and wet chemistry
- Assessing specific gravity of young Eucalyptus plantation trees using a resistance drilling technique
- A novel device to measure gaseous permeability over a wide range of pressures: characterisation of slip flow for Norway spruce, European beech, and wood-based materials
- Stress relaxation of composites made of polypropylene and organo-montmorillonite modified wood flour during water immersion
- Sorption/desorption hysteresis revisited. Sorption properties of Pinus pinea L. analysed by the parallel exponential kinetics and Kelvin-Voigt models
- Effect of exogenous IAA on tension wood formation by facilitating polar auxin transport and cellulose biosynthesis in hybrid poplar (Populus deltoids × Populus nigra) wood
Articles in the same Issue
- Frontmatter
- Original Articles
- Effects of hot water extraction (HWE) of Douglas fir as a pre-process for the sulfite pretreatment to overcome recalcitrance of lignocellulose (SPORL)
- Structural characteristics of milled wood lignin (MWL) isolated from green liquor (GL) pretreated poplar (Populus deltoides)
- TEMPO-mediated electro-oxidation reactions of non-phenolic β-O-4-type lignin model compounds
- Microstructure of chemically modified wood using X-ray computed tomography in relation to wetting properties
- The effects of thermal treatment on the nanomechanical behavior of bamboo (Phyllostachys pubescens Mazel ex H. de Lehaie) cell walls observed by nanoindentation, XRD, and wet chemistry
- Assessing specific gravity of young Eucalyptus plantation trees using a resistance drilling technique
- A novel device to measure gaseous permeability over a wide range of pressures: characterisation of slip flow for Norway spruce, European beech, and wood-based materials
- Stress relaxation of composites made of polypropylene and organo-montmorillonite modified wood flour during water immersion
- Sorption/desorption hysteresis revisited. Sorption properties of Pinus pinea L. analysed by the parallel exponential kinetics and Kelvin-Voigt models
- Effect of exogenous IAA on tension wood formation by facilitating polar auxin transport and cellulose biosynthesis in hybrid poplar (Populus deltoids × Populus nigra) wood