Flame retardancy, antifungal efficacies, and physical–mechanical properties for wood/polymer composites containing zinc borate

Abstract

Summary This work aimed to examine flame retardancy, antifungal performance and physical–mechanical properties for silane‐treated wood–polymer composites (WPCs) containing zinc borate (ZnB). ZnB with content from 0.0 to 7.0 wt% was added to WPCs, and silane‐treated wood contents were varied. The polymers used were poly(vinyl chloride) (PVC) and high‐density polyethylene (HDPE). The decay test was performed according to the European standard EN 113. Loweporus sp., a white‐rot fungus, was used for antifungal performance evaluation. Antifungal performance was observed to decrease with wood content. Incorporation of ZnB at 1.0 wt% significantly increased the antifungal performance of WPCs. ZnB content of greater than 1.0 wt% lowered the antifungal properties of WPCs. The results suggested that the wood/PVC composite exhibited better antifungal performance than the wood/HDPE composite. The addition of wood flour to PVC and HDPE decreased flame retardancy, whereas the incorporation of ZnB retained the flame retardancy. ZnB was found to be more appropriate for wood/PVC than wood/HDPE as a result of hydrogen chloride generated from the dehydrochlorination reaction of PVC. The results indicated that the addition of ZnB did not affect the physical‐mechanical properties of neat polymers and the composites. Copyright © 2016 John Wiley & Sons, Ltd.

X-ray Shielding, Mechanical, Physical, and Water Absorption Properties of Wood/PVC Composites Containing Bismuth Oxide

“…Figure 3 also shows mechanical properties of a neat PVC (dashed lines), indicating that the values of flexural strength of WPVC composites were lower than the neat PVC, which could be due to incompatibility between the PVC matrix and the wood particles as well as differences in shrinkage of the matrix and wood particles during cooling, which generated defects and voids within the composites [ 37 ]. On the other hand, the Izod impact strength and hardness (Shore D) of the WPVC composites were noticeably higher than the neat PVC, mainly due to the reduced chain segmental motions caused by the added fillers and the high rigidity of the fillers, respectively.…”

“… ( a ) Flexural strength, ( b ) Izod impact strength, and ( c ) hardness (Shore D) of WPVC composites containing 0–100 pph of Bi 2 O 3 and 20–40 pph of wood particles, where error bars = ± standard deviation. The red-dashed lines represent flexural strength, Izod impact strength, and hardness (Shore D) of a neat PVC obtained from [ 37 , 38 , 39 ]. …”

The Effect of Colemanite Addition on the Microstructural and Mechanical Characteristics of Ipp

“…Therefore, there existed many studies in literature corresponding to the boron mineral which were utilized as a filler in the polymer composites in order to impart the advanced characteristics such as mechanical, flame retardancy, water absorption etc. to the polymers [27][28][29][30]. Furthermore, boron minerals make the scientists unable to fabricate halogen free polymer composite by means of their flame retardant characteristic feature [31,32].…”

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