Impact of high moisture conditions on the serviceability performance of wood plastic composite decks

Machado, José S.; Santos, Sara; Pinho, Fernando F. S.; Luís, Fábio Alexandre Lameira da Costa; Alves, Ana; Simões, Rita; Rodrigues, José Carlos

doi:10.1016/j.matdes.2016.04.030

Cited by 38 publications

(20 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…A comprehensive analysis of various factors influencing the performance of WPCs has been recently reported by Olakanmi and Strydom . In addition, several studies have correlated the effects of moisture, or water uptake, to the reduction of mechanical properties, that is, bending, tension, impact, and creep . Properties decay has been attributed to the degradation of the natural filler as a result of long‐term water exposition, development of internal stress due to filler swelling and matrix–reinforcement interface failure .…”

Section: Introductionmentioning

confidence: 99%

“…The dependency of mechanical properties of WPC on moisture absorption has been widely investigated while, to the authors' knowledge, not enough attention has been paid to the influence of water soaking in conjunction with thermal conditioning . Since WPCs are mainly used in outdoor applications, where temperature can vary in a quite large range, understanding the complex interplay between these two factors is very important to predict the performance reduction.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Combined effect of water uptake and temperature on wood polymer composites

Fortini

Mazzanti

2018

J of Applied Polymer Sci

View full text Add to dashboard Cite

Wood polymer composites are materials frequently used for outdoor applications, since they can operate under a large range of temperature and moisture conditions. The present work investigates the combined effect of water soaking and temperature (ranging from 10 up to 40 °C) on wood flour filled high density polyethylene. Water soaking tests have revealed that the percentage of absorbed water at the saturation plateau increases with temperature due to the induced stiffness reduction of the polymeric matrix. This hypothesis has been confirmed by scanning electron microscopy analyses, which has allowed to observe the filler–matrix interface and to measure the wood flour particle size. In addition, instrumented Charpy impact tests have shown a strong toughness reduction as a consequence of fiber–matrix debonding induced by particle swelling, which worsens with temperature. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46674.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Combined effect of water uptake and temperature on wood polymer composites

Fortini

Mazzanti

2018

J of Applied Polymer Sci

View full text Add to dashboard Cite

show abstract

“…Therefore, owing to long straw integrity, long straw reinforced composites should theoretically have high strength. In addition, polypropylene (PP) and high density polyethylene are commonly used as matrixes because of their high strength and suitable processing temperatures [14,15], but the toughness of HDPE and PP-based composites is poor [16]. Therefore, other matrix options must be developed.…”

mentioning

confidence: 99%

Performance of Straw/Linear Low Density Polyethylene Composite Prepared with Film-Roll Hot Pressing

Zhang

Wang

2020

Polymers

View full text Add to dashboard Cite

Thermoplastic composites are usually prepared with the extrusion method, and straw reinforcement material must be processed to fiber or powder. In this study, film-roll hot pressing was developed to reinforce linear low density polyethylene (LLDPE) with long continuous straw stems. The long straw stems were wrapped with LLDPE film and then hot pressed and cooled to prepare straw/LLDPE composite. Extruded straw fiber/LLDPE composite was prepared as a control. The mechanical properties of these LLDPE-based composites were evaluated. The hot pressed straw/LLDPE composite provided higher tensile strength, tensile modulus, flexural strength, flexural modulus, and impact strength than the traditional extruded straw/LLDPE composite, by 335%, 107%, 68%, 57%, and 181%, respectively, reaching 35.1 MPa, 2.65 GPa, 3.8 MPa, 2.15 GPa, and 25.1 KJ/m 2 . The density of the hot pressed straw/LLDPE composite (0.83 g/cm 3 ) was lower than that of the extruded straw/LLDPE composite (1.31 g/cm 3 ), and the former had a higher ratio of strength-to-weight. Scanning electron microscopy indicated that the orientation of the straws in the composite was better with the new method. Differential scanning calorimetry tests revealed that in hot pressed straw/LLDPE composite, straw fibers have a greater resistance to the melting of LLDPE than extruded composite. Rotary rheometer tests showed that the storage modulus of the hot pressed straw/LLDPE was less affected by frequency than that of the extruded composite, and the better elastic characteristics were pronounced at 150 • C. The hot pressed straw/LLDPE composite absorbed more water than the extruded composite and showed a potential ability to regulate the surrounding relative humidity. Our results showed that straw from renewable sources can be used to produce composites with good performance.Researchers have made some achievements in straw fiber reinforced composites. Nyambo et al. [7] used maleic acid-grafted polyurethane (PU-g-MA) to improve the interfacial adhesion between wheat straw and polyurethane (PU). They found that the addition of 3 phr and 5 phr PU-g-MA significantly increased the tensile strength (20%) and flexural strength (14%) of straw/PU composites, and proved that the increase in strength was due to the well combination of fibers and matrix. Xiao et al.[8] treated the straw with NaOH solution, blended the straw, polyethylene, stearic acid and maleic anhydride, then hot pressed to manufacture the straw/PP composite. The composite has low water absorption and good acid and alkali resistance; Zhang et al. [9] investigated the effects of different straw treatment methods, the particle size of straw powder, and the mass fraction of straw on the mechanical properties of straw/PP composites. The results show that when the straw is treated with the silane coupling agent KH570, the mechanical properties of the straw/PP composite are the best when the particle size of the straw powder is 60 mesh and the mass fraction is 50%; Zabihzadeh et al. [10] investigated the effect of maleic ...

show abstract

“…6. The typical vibration bands of SS/PVC composites included 3500 cm -1 to 3300 cm -1 (O-H stretching, fiber), 2935 cm -1 to 2900 cm -1 (C-H asymmetrical stretching, fiber, and PVC), 1735 cm -1 to 1700 cm -1 (C=O stretching, fiber), 1515 cm -1 to 1505 cm -1 (aromatic skeleton vibrations), 1425 cm -1 (C-H deformation, fiber, and PVC), 1250 cm -1 to 1230 cm -1 (C-O and Si-C stretching, fiber), 1100 cm -1 to 970 cm -1 (C-O stretching and C-C deformation, fiber, and PVC), and 700 cm -1 to 600 cm -1 (C-Cl stretching, PVC) (Islam et al 2012;Migneault et al 2015;Zierdt et al 2015;Machado et al 2016). The vibration band at the range of 3500 to 3300 cm -1 became weaker with the addition of 0.8SA-0.5PA and the increasing exposure duration, which indicated that encapsulation of the fiber formed by 0.8SA-0.5PA.…”

Section: Ftir Analysis Of the Ss/pvc Compositesmentioning

confidence: 99%

Wear Properties of Wood-plastic Composites Pretreated with a Stearic Acid-palmitic Acid Mixture before Exposure to Degradative Water Conditions

Jiang

et al. 2018

BioResources

View full text Add to dashboard Cite

Wood-plastic composites (WPCs) are experiencing rapid growth in terms of applications where they may be subject to degradation and wear. This paper investigated the effect of sorghum straw (SS) fiber, pretreated with a mixture of stearic and palmitic acids, on the wear behaviors of polyvinyl chloride (PVC) composites in alternated simulated sea water and acid rain aqueous conditions. The results showed that the water resistance of the SS/PVC composites improved noticeably after pretreatment with 0.80 wt% stearic and 0.50 wt% palmitic acid (0.8SA-0.5PA). The SS/PVC composites pretreated with 0.8SA-0.5PA exhibited high water (moisture) resistance, hardness, mechanical, thermal, and wear resistance properties. Exposure to degradative water worsened interfacial bonding, and degraded the matrix strength and heat resistance, which reduced the wear resistance of the SS/PVC composites. The wear mechanism of the SS/PVC composites after 12 d of soaking was abrasive wear.

show abstract

Impact of high moisture conditions on the serviceability performance of wood plastic composite decks

Cited by 38 publications

References 26 publications

Combined effect of water uptake and temperature on wood polymer composites

Combined effect of water uptake and temperature on wood polymer composites

Performance of Straw/Linear Low Density Polyethylene Composite Prepared with Film-Roll Hot Pressing

Wear Properties of Wood-plastic Composites Pretreated with a Stearic Acid-palmitic Acid Mixture before Exposure to Degradative Water Conditions

Contact Info

Product

Resources

About