Journal article
Preparation and properties of aligned poly(3-hydroxybutyrate-co-3-hydroxyvalerate)/cellulose nanowhiskers composites
Carbohydrate polymers, Vol.92(1), pp.206-213
01/30/2013
Handle:
https://hdl.handle.net/2376/109402
PMID: 23218284
Abstract
► Unidirectionally aligned CNW composite was developed by applying electrical field. ► CNW concentration governs the degree of CNW alignment under the field. ► The electric field was effective in aligning CNWs up to 4wt% CNW concentration. ► Above CNW content of 4wt%, CNW/PHBV and CNW/CNW interactions restrain CNW mobility. ► The aligned composite showed strong anisotropy.
In this study a unidirectionally aligned cellulose nanowhisker (CNW) composite was developed. CNW in poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) matrix was aligned using an external electric field and the morphology and mechanical properties of the resultant anisotropic composites were studied. PHBV films with 1.5–7wt% of CNWs were manufactured using solution casting. A DC electric field of 56.25kV/m was applied during solvent evaporation. Both microstructural and mechanical analyses were performed to study the orientation of CNWs in the films. Mechanical properties of the samples were tested at 0°, 15°, 30°, 45° and 90° with respect to electric field direction by a dynamic mechanical analyzer (DMA). DMA results showed that CNW concentration has a strong influence on the degree of CNW alignment. The electric field was effective in aligning CNWs up to 4wt% CNW concentration. The samples with higher concentrations showed virtually isotropic behavior, due to significantly enhanced restraints on CNW mobility. The restrains were attributed to CNW/CNW and CNW/polymer interactions. Rheological results confirmed the enhance restraints.
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Details
- Title
- Preparation and properties of aligned poly(3-hydroxybutyrate-co-3-hydroxyvalerate)/cellulose nanowhiskers composites
- Creators
- Elena Ten - Composite Materials and Engineering Center, Washington State University, Pullman, WA 99164-1806, United StatesLong Jiang - Department of Mechanical Engineering, North Dakota State University, Fargo, ND 58108-6050, United StatesMichael P Wolcott - Composite Materials and Engineering Center, Washington State University, Pullman, WA 99164-1806, United States
- Publication Details
- Carbohydrate polymers, Vol.92(1), pp.206-213
- Academic Unit
- Office of Clean Technology
- Publisher
- Elsevier Ltd
- Identifiers
- 99900547210701842
- Language
- English
- Resource Type
- Journal article