Characterization of Nano-Mechanical, Surface and Thermal Properties of Hemp Fiber-Reinforced Polycaprolactone (HF/PCL) Biocomposites

Applied Sciences

卷:10

Jurgita Zekonyte¹  Zhongyi Zhang¹  HomNath Dhakal¹  SikiruOluwarotimi Ismail²  Johnny Beaugrand³ 

[1] Advanced Materials and Manufacturing (AMM) Research Group, School of Mechanical and Design Engineering, University of Portsmouth, Portsmouth PO1 3DJ, UK;

[2] Department of Engineering, Centre for Engineering Research, School of Engineering and Computer Science, University of Hertfordshire, Hatfield AL10 9AB, UK;

[3] INRAE, UMR614 Fractionnement des AgroRessources et Environnement, F-51686 Reims, France;

关键词: polycaprolactone;    hemp fibre;    biocomposites;    contact angle measurements;    nanoindentation;    nano-mechanical properties;   

DOI  :  10.3390/app10072636

来源: DOAJ

【 摘 要 】

The quest for sustainable, low-cost and environmental friendly engineering materials has increased the application of natural fiber-reinforced polymer (FRP) composite. This paper experimentally investigates the effects of variable mean hemp fiber (HF) aspect ratios (ARs) of 00 (neat), aspect ratios AR_19, AR_26, AR_30 and AR_38 on nano-mechanical (hardness, modulus, elasticity and plasticity), surface and thermal properties of hemp fiber/polycaprolactone (HF/PCL) biocomposites. These biocomposites were characterized by nanoindentation, contact angle, surface energy, thermogravimetric analysis (TGA), thermal conductivity and differential scanning calorimetry (DSC) techniques. After nanoindentation and thermal conductivity tests, the results obtained evidently show that the HF/PCL sample with aspect ratio (AR_26) recorded optimal values. These values include maximum hardness of approximately 0.107 GPa, elastic modulus of 1.094 GPa, and plastic and elastic works of 1.580 and 1.210 nJ, respectively as well as maximum thermal conductivity of 0.2957 W/mK, when compared with other samples. Similarly, the optimal sample exhibits highest main degradable temperature and degree of crystallinity of 432 ℃ and 60.6%, respectively. Further results obtained for the total surface energies and contact angles of these samples with glycerol and distilled water are significant for their materials selection, design, manufacturing and various applications.

【 授权许可】

Unknown