3 years ago

Synergistic effect of treatment with disodium octaborate tetrahydrateand guanyl urea phosphate on flammability of pine wood

Shijing Wang, Chuigen Guo, Qingwen Wang

Abstract

Scots pine (Pinus sylvestris) wood was treated with disodium octaborate terahydrate (DOT) and guanyl urea phosphate (GUP) to impart flame retardance. The flame retardance and thermal stability of pine wood was evaluated by limited oxygen index (LOI), UL-94, thermogravimetry and cone calorimeter. The results indicated that the thermal stability was significantly improved with impregnation of a 1:1 DOT/GUP 10–15% aqueous solution. DOT/GUP treated pine wood fell within the nonflammable range of the Chinese national standard of nonflammable materials with LOI value of 40.8% using 10% (w/w) aqueous solution. Thermogravimetric analysis showed that the treated pine wood samples reduced the weight loss, increased residual char, but lowered pyrolysis temperature. The highest char yield was obtained from pine wood treatments with DOT/GUP. The flammability parameters by the cone calorimeter, including heat release rate (HRR), total heat release (THR), smoke production rate (SPR), and total smoke production (TSP) showed that most parameters (HRR, THR, SPR, TSP) of the treated pine wood samples decreased especially for the DOT/GUP treatment, which indicated a synergistic flame retardant and smoke suppression effect. This finding has not been reported in previous literature. The flame retardant was found to have penetrated into the cell wall with scanning electronic microscopic observation, which makes DOT/GUP enhance char-forming ability of wood.

Publisher URL: https://link.springer.com/article/10.1007/s00107-017-1171-1

DOI: 10.1007/s00107-017-1171-1

You might also like
Discover & Discuss Important Research

Keeping up-to-date with research can feel impossible, with papers being published faster than you'll ever be able to read them. That's where Researcher comes in: we're simplifying discovery and making important discussions happen. With over 19,000 sources, including peer-reviewed journals, preprints, blogs, universities, podcasts and Live events across 10 research areas, you'll never miss what's important to you. It's like social media, but better. Oh, and we should mention - it's free.

  • Download from Google Play
  • Download from App Store
  • Download from AppInChina

Researcher displays publicly available abstracts and doesn’t host any full article content. If the content is open access, we will direct clicks from the abstracts to the publisher website and display the PDF copy on our platform. Clicks to view the full text will be directed to the publisher website, where only users with subscriptions or access through their institution are able to view the full article.