Related Experiment Video
Updated: Jun 29, 2026
Manufacturing Of Robust Natural Fiber Preforms Utilizing Bacterial Cellulose as Binder
Published on: May 22, 2014
Deep eutectic solvent-programmed interphase for tunable strength, stiffness-damping balance, and moisture durability
Hui Shi1, Yao Pang2, Siyao Wang2
1Key Laboratory of Wooden Material Science and Application (Beijing Forestry University), Ministry of Education, Beijing, 100083, China; Beijing Products Quality Supervision and Inspection Institute, Key Laboratory of Furniture Health and Intelligent Quality Safety, State Administration for Market Regulation, Beijing, 101300, China.
Deep eutectic solvent pretreatment enhances bamboo fiber/polyhydroxyalkanoate biocomposites by optimizing the fiber-matrix interface. This coupling-agent-free method improves mechanical strength, thermal stability, and moisture resistance.
Area of Science:
- Materials Science
- Polymer Science
- Biocomposites
Background:
- Natural fiber reinforced polyhydroxyalkanoate (PHA) biocomposites suffer from poor interfacial compatibility and stress transfer.
- This limits their structural performance and widespread application.
Purpose of the Study:
- To investigate the use of choline chloride lactic acid (ChCl-LA) deep eutectic solvent (DES) as a programmable parameter to modify the bamboo fiber (BF)/PHA interphase.
- To enhance interfacial compatibility and stress transfer without external coupling agents.
Main Methods:
- DES pretreatment of bamboo fibers with varying solid-to-liquid ratios.
- Chemical composition analysis (Van Soest, FTIR, XPS).
- Crystallinity analysis (XRD).
- Mechanical testing (tensile strength).
- Dynamic mechanical analysis (tan δ).
- Water uptake measurements.
- Thermal analysis (TGA, DSC).
Main Results:
- DES pretreatment reduced hemicellulose and lignin, increasing cellulose content and fiber crystallinity.
- Optimized interphase significantly improved tensile strength (45.49% increase).
- Improved stiffness-damping balance and reduced long-term water uptake.
- Enhanced thermal stability (increased Tonset and Tmax) and PHA crystallization temperature.
Conclusions:
- DES dosage programming is an effective, scalable, coupling-agent-free strategy for tuning BF/PHA interphase.
- This approach balances mechanical, thermal, and moisture durability in fully biobased composites.
