Effects of UV-accelerated weathering and natural weathering conditions on anti-fungal efficacy of wood/PVC composites doped with propylene glycol-based HPQM

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Author list: Srimalanon P., Yamsaengsung W., Kositchaiyong A., Wimolmala E., Isarangkura K., Sombatsompop N.

Publisher: Budapest University of Technology

Publication year: 2016

Journal: Express Polymer Letters (1788-618X)

Volume number: 10

Issue number: 4

Start page: 289

End page: 301

Number of pages: 13

ISSN: 1788-618X

URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84955584885&doi=10.3144%2fexpresspolymlett.2016.27&partnerID=40&md5=49de54507f906d464687b1d2c6484917

Languages: English-Great Britain (EN-GB)

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Abstract

This work studied the mechanical, physical and weathering properties and anti-fungal efficacy of polyvinyl chloride(PVC) and wood flour/polyvinyl chloride composites(WPVC). 2-hydroxypropyl-3-piperazinyl-quinoline carboxylic acid methacrylate (HPQM) in propylene glycol was used as an anti-fungal agent. Propylene glycol-based HPQM was doped in neat PVC and in WPVC containing 50 and 100 pph wood (WPVC-50 and WPVC-100). The flexural properties of PVC decreased when propylene glycol-based HPQM was added. However, adding this component did not affect the flexural properties of WPVC. Fungal growth inhibition test and dry weight technique were used for evaluation of anti-fungal effectiveness. Aspergillus niger was used as a testing fungus. Adding propylene glycol-based HPQM to WPVC-100 led to the most effective anti-fungal performance. Wood flour acted as an anti-fungal promoter for the WPVC composites. The optimal dosages of propylene glycol-based HPQM in PVC, WPVC-50, and WPVC-100 were 50000, 15000, and 10000 ppm, respectively. UV-accelerated weathering aging and natural weathering conditions were found to affect the flexural properties of PVC and WPVC. The change in the anti-microbial performance of WPVC under natural weathering were slower than those under UV-accelerated weathering aging. The anti-microbial evaluation indicated that the samples doped with less than 20 000 ppm propylene glycol-based HPQM had a more pronounced effect than the ones doped with higher dosages. ฉ BME-PT.

Keywords

Anti-fungal activities