Decay resistance of acetic, propionic, and butyric anhydrides modified rubberwood against brown rot (Coniophora puteana)

Nuraishah Hassan, Norul Hisham Hamid, Mohammad Jawaid, Paridah Md Tahir, Salmiah Ujang

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

Rubber trees were cut to the dimensions 25 mm x 140 mm x 1000 mm (R x T x L) and kiln-dried (10% to 12% moisture content, MC). The specimens (20 mm x 20 mm x 5 mm) (R x T x L) were prepared, and a Soxhlet extraction with toluene/methanol/acetone (4:1:1 by volume) was performed for 8 h. The specimens were oven-dried (103 °C for 24 h) and cooled (gel silica). Then, vacuum impregnation was conducted, and reactions with acetic, propionic, and butyric anhydrides took place for 0.25 h, 1 h, 4 h, 8 h, 10 h, 15 h, 24 h, 30 h, 36 h, and 48 h at 120 °C. The chemical bonding was confirmed by Fourier transform infrared (FTIR) analysis. The specimens were leached in deionized water and exposed to brown rot (Coniophora puteana) in an incubation room at 22 °C for 16 weeks. The fastest reaction was with butyric anhydride, then propionic and acetic anhydrides. The lowest weight loss occurred with acetic anhydride after being decayed by C. puteana at 14.0% weight percent gain (WPG). All of the modified rubberwoods (acetic, propionic, and butyric anhydrides) at the maximum WPG were classified as durability class 1. The scanning electron microscopy (SEM) observation confirmed that the hyphae penetrated the cells in both the untreated and anhydride modified rubberwood.

Original languageEnglish
Pages (from-to)4527-4546
Number of pages20
JournalBioResources
Volume12
Issue number3
DOIs
Publication statusPublished - Aug 1 2017
Externally publishedYes

Keywords

  • Anhydrides
  • Brown rot
  • Decay resistance
  • Rubberwood

ASJC Scopus subject areas

  • Environmental Engineering
  • Bioengineering
  • Waste Management and Disposal

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