Adebayo, Ganiyat Olusola and Hassan, Aziz and Yahya, Rosiyah and Muhamad Sarih, Norazilawati and Odesanya, Kazeem Olabisi (2021) Impact of water saturation on the tensile and thermal properties of heat-treated mangrove/high-density polyethylene composites. Journal of Thermoplastic Composite Materials, 34 (4). pp. 508-522. ISSN 0892-7057, DOI https://doi.org/10.1177/0892705719847238.
Full text not available from this repository.Abstract
The main barrier in the use of natural fiber (NF) as a reinforcing material in thermoplastic composites meant for outdoor applications is NF's hydrophilicity. Thus, heat treatment of vacuum-dried mangrove was conducted at 120 degrees C in order to reduce the hydrophilic nature of mangrove. The untreated and heat-treated mangrove particles were compounded with high-density polyethylene (HDPE) at 10, 20, and 30 wt% in a twin-screw extruder and injection molded into dog-bone-shaped test pieces for tensile tests and thermal analysis (thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC)). Test pieces were immersed in distilled water for 1440 h at ambient temperature (approximately 27 degrees C) and a relative humidity of 60-65%. The results revealed that the earliest and latest water saturation were observed at 480 and 792 h for 10 wt% treated and 30 wt% untreated composites, respectively. The dry composites maintained higher tensile strength and modulus but lower tensile strain than the water-saturated composites irrespective of treatment. Scanning electron microscopy of tensile fractured surfaces confirmed an improved mangrove-HDPE interfacial interaction of treated composites in both dry and water-saturated conditions. The TGA and DSC data showed that the maximum degradation temperature of dry composites is higher than the wet composites. Overall, the treated composites at dry and water-saturated conditions indicated better tensile and thermal stability than the untreated mangrove-filled HDPE composites; these are possible indications of better performance during outdoor applications.
| Item Type: | Article |
|---|---|
| Funders: | UNSPECIFIED |
| Uncontrolled Keywords: | Mangrove plastic composite; Heat treatment; Crystallinity; Thermogravimetric analysis; Moisture absorption; Interfacial adhesion; Morphology |
| Subjects: | Q Science > QD Chemistry T Technology > TJ Mechanical engineering and machinery |
| Divisions: | Faculty of Engineering > Department of Mechanical Engineering Faculty of Science > Department of Chemistry |
| Depositing User: | Ms Zaharah Ramly |
| Date Deposited: | 15 Jun 2022 05:04 |
| Last Modified: | 15 Jun 2022 05:04 |
| URI: | http://eprints.um.edu.my/id/eprint/27935 |
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