Influence of wood surface chemistry on the tensile and flexural properties of heat-treated mangrove/high-density polyethylene composites

Adebayo, Ganiyat Olusola; Hassan, Aziz; Yahya, Rosiyah; Rahman, Nor Mas Mira Abd; Lafia-Araga, Ruth Anayimi

doi:10.1007/s00289-019-02731-0

Cited by 10 publications

(6 citation statements)

References 36 publications

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“…Similar results were also obtained for petrochemical polypropylene (PP) composites [65], which showed an E of 510 MPa, σ of 10.9 MPa, and ε of 5.09%-which was also the case for the PP/wood composite filled with 50% birch plywood sanding dust. Several authors also stressed that the mechanical properties of wood polymer composites are strongly dependent on the filler content, coupling agent, and filler's modification treatment [66][67][68]. As expected, the additional cross-linking treatment of MCC composites increased the compatibility of the cellulose filler and the polymer matrix.…”

Section: Mechanical Propertiesmentioning

confidence: 77%

Highly Loaded Cellulose/Poly (butylene succinate) Sustainable Composites for Woody-Like Advanced Materials Application

et al. 2019

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We report the manufacturing and characterization of poly (butylene succinate) (PBS) and micro cellulose (MCC) woody-like composites. These composites can be applied as a sustainable woody-like composite alternative to conventional fossil polymer-based wood-plastic composites (WPC). The PBS/MCC composites were prepared by using a melt blending of 70 wt% of MCC processed from bleached softwood. MCC was modified to enhance dispersion and compatibility by way of carbodiimide (CDI), polyhydroxy amides (PHA), alkyl ester (EST), (3-Aminopropyl) trimethoxysilane (APTMS), maleic acid anhydride (MAH), and polymeric diphenylmethane diisocyanate (PMDI). The addition of filler into PBS led to a 4.5-fold improvement of Young’s modulus E for the MCC composite, in comparison to neat PBS. The 1.6-fold increase of E was obtained for CDI modified composition in comparison to the unmodified MCC composite. At room temperature, the storage modulus E′ was found to improve by almost 4-fold for the APTMS composite. The EST composite showed a pronounced enhancement in viscoelasticity properties due to the introduction of flexible long alkyl chains in comparison to other compositions. The glass transition temperature was directly affected by the composition and its value was −15 °C for PBS, −30 °C for EST, and −10 °C for MAH composites. FTIR indicated the generation of strong bonding between the polymer and cellulose components in the composite. Scanning electron microscopy analysis evidenced the agglomeration of the MCC in the PBS/MCC composites. PMDI, APTMS, and CDI composites were characterized by the uniform dispersion of MCC particles and a decrease of polymer crystallinity. MCC chemical modification induced the enhancement of the thermal stability of MCC composites.

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Section: Mechanical Propertiesmentioning

confidence: 77%

Highly Loaded Cellulose/Poly (butylene succinate) Sustainable Composites for Woody-Like Advanced Materials Application

et al. 2019

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“…At 120°C, MP contained the highest content of cellulose and scanning electron microscopy showed openings that could provide easy interlocking with HDPE matrix; these are evidences of surface improvement of MP. 8…”

Section: Methodsmentioning

confidence: 99%

“…Heat treatment is one of the processes used to modify the properties of wood by changing the wood’s polar nature, thereby resulting in a better wood–polymer matrix compatibility and eventually composites of good quality. 7,8 Heat treatment serves to improve the properties of the wood, such as dimensional stability and resistance to biocorrosion, and to equip the wood material with new properties. 9 Heat modification of wood fibre has an affirmative effect on its strength and properties since the wood’s hydrophilicity is lowered and the maximum amount of water is reduced.…”

Section: Introductionmentioning

confidence: 99%

Dynamic rheological properties of spotted mangrove/high-density polyethylene composites

Adebayo

Hassan

Yahya

et al. 2019

Journal of Thermoplastic Composite Materials

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This study describes the viscoelastic characterizations of unmodified and heat-modified mangrove particle (MP)-filled high-density polyethylene (HDPE) composites. The untreated (unmodified) and treated (modified) MPs were compounded with HDPE matrix at 10, 20 and 30 wt% in a twin-screw extruder and compression moulded into thin sheets for rheological characterizations (amplitude and frequency sweeps). The amplitude sweeps of the dynamic rheological analysis indicated that 20 wt% treated composite has the highest linear viscoelastic region of 0.1% with the highest storage and loss modulus of 1310 and 150 kPa, respectively. The frequency sweep showed an increase in storage and loss moduli as particle loading increased. The zero shear viscosities of pure HDPE were nearly 3990 Pa·s, while the MP-reinforced HDPE composites were ≥185,440 Pa·s with treated composites exhibiting higher values.

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“…The composites were dried before testing, so that the high water loss may have resulted from the decomposition of combined water molecules due to the high hydrophilicity of WS in the composites. 40,41 The second stage was the major decomposition stage, which occurred between 260 C and 500 C and led to the most significant mass loss. 42 As a result of the breaking and recombination of cellulose molecules caused by thermal depolymerization, a shoulder peak containing the central peak and a side peak simultaneously is apparent.…”

Section: Tg/dtg Analysismentioning

confidence: 99%

Enhancement of properties of walnut shell/attapulgite/polyvinyl chloride composites with ultrasonic and hydrothermal treatment

Chen

Zhang

Yang

et al. 2023

Textile Research Journal

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The effects of ultrasonic and hydrothermal treatment on the physical, mechanical, wear resistance, water absorption and thermal stability of the walnut shell (WS)/attapulgite (ATP)/polyvinyl chloride (PVC) composite and its enhancement mechanism were investigated. WS was treated by ultrasound and hydrothermal treatment and mixed with PVC and ATP, and the WS/ATP/PVC composites were prepared by melt extrusion. The properties of composites were characterized, and the results showed that after ultrasonic and hydrothermal treatment, the main chemical structure of composites was not changed significantly. Compared with untreated composites, the wear resistance after ultrasonic treatment for 10 min is the best. After ultrasonic treatment for 15 min, the bending strength, tensile strength and impact strength of the composite are increased by 8.9%, 10.3% and 46.2%, respectively. Hydrothermal treatment at appropriate temperatures also improved some properties of the composites. The composites after hydrothermal treatment at 110°C had the best thermal stability and highest hardness, and the bending strength and tensile strength values were increased by 5.9% and 5.2%, respectively. The impact strength of the composite increased with the increase of hydrothermal treatment temperature. The results showed that ultrasonic and hydrothermal treatments have the potential to improve the performance of wood–plastic composites as environmentally friendly pretreatment methods.

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Influence of wood surface chemistry on the tensile and flexural properties of heat-treated mangrove/high-density polyethylene composites

Cited by 10 publications

References 36 publications

Highly Loaded Cellulose/Poly (butylene succinate) Sustainable Composites for Woody-Like Advanced Materials Application

Highly Loaded Cellulose/Poly (butylene succinate) Sustainable Composites for Woody-Like Advanced Materials Application

Dynamic rheological properties of spotted mangrove/high-density polyethylene composites

Enhancement of properties of walnut shell/attapulgite/polyvinyl chloride composites with ultrasonic and hydrothermal treatment

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