Scholarlink

<p>Wood modification is proposed as an environmentally friendly alternative to conventional preservative treatments, with the aim of improving biological durability and dimensional stability without the use of biocidal compounds. In this study, a new approach by in situ polymerization of non-isocyanate polyurethanes (NIPUs) was investigated for beech (<i>Fagus sylvatica</i> L.) and Scots pine (<i>Pinus sylvestris</i> L.). Erythritol bis(carbonate) (ECC) synthesized from erythritol and dimethyl carbonate (DMC) was used as a biobased precursor. Impregnation of both species with ECC and hexamethylenediamine (HMDA) or tris(2-aminoethyl)amine (TAEA) solubilized in dimethylformamide (DMF), followed by heating, resulted in the formation of NIPUs in the wood structure. Spectroscopic analyses (Infrared, Nuclear Magnetic Resonance) confirmed polymer formation, while Scanning Electron Microscopy observations revealed the presence of NIPU in the wood cell wall and lumens. Despite partial leaching, significant mass gains (18–32%) and bulking effects indicated polymer retention and interaction with the wood. At a high temperature of 120&#xa0;°C, the use of TBD catalyst was responsible for secondary reactions so ECC + HMDA (1:1) without catalyst at 80&#xa0;°C was identified as the best route to form NIPU. For modified Scots pine, dimensional stability tests showed anti-swelling efficiency up to 37% and preliminary degradation resistance assessments showed a mass loss &lt; 1.5% with the brown rot fungus <i>Coniophora puteana</i>. These results constitute a feasibility study for wood modification with biobased NIPUs, highlighting the potential of cyclic carbonates derived from natural sugars as a sustainable alternative to conventional treatments.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Wood modification by in situ polymerization of non-isocyanate polyurethane using biobased erythritol bis(carbonate) and polyamines

  • 期刊论文

  • 发表日期：

    2026年5月8日

查看全文
  • Pierre Vinchelin,
  • Philippe Gérardin,
  • Laura Figel,
  • Emmanuel Fredon

摘要

Wood modification is proposed as an environmentally friendly alternative to conventional preservative treatments, with the aim of improving biological durability and dimensional stability without the use of biocidal compounds. In this study, a new approach by in situ polymerization of non-isocyanate polyurethanes (NIPUs) was investigated for beech (Fagus sylvatica L.) and Scots pine (Pinus sylvestris L.). Erythritol bis(carbonate) (ECC) synthesized from erythritol and dimethyl carbonate (DMC) was used as a biobased precursor. Impregnation of both species with ECC and hexamethylenediamine (HMDA) or tris(2-aminoethyl)amine (TAEA) solubilized in dimethylformamide (DMF), followed by heating, resulted in the formation of NIPUs in the wood structure. Spectroscopic analyses (Infrared, Nuclear Magnetic Resonance) confirmed polymer formation, while Scanning Electron Microscopy observations revealed the presence of NIPU in the wood cell wall and lumens. Despite partial leaching, significant mass gains (18–32%) and bulking effects indicated polymer retention and interaction with the wood. At a high temperature of 120 °C, the use of TBD catalyst was responsible for secondary reactions so ECC + HMDA (1:1) without catalyst at 80 °C was identified as the best route to form NIPU. For modified Scots pine, dimensional stability tests showed anti-swelling efficiency up to 37% and preliminary degradation resistance assessments showed a mass loss < 1.5% with the brown rot fungus Coniophora puteana. These results constitute a feasibility study for wood modification with biobased NIPUs, highlighting the potential of cyclic carbonates derived from natural sugars as a sustainable alternative to conventional treatments.