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Neutrals influence on the water resistance coefficient of phenol-formaldehyde resin modified by wood pyrolysis liquid products
Biomass Conversion and Biorefinery ( IF 4 ) Pub Date : 2020-09-24 , DOI: 10.1007/s13399-020-01025-0
Sergey Zabelkin , Aygul Valeeva , Almira Sabirzyanova , Andrey Grachev , Vladimir Bashkirov

This article presents the results of the investigation of the properties of phenol-formaldehyde resin, obtained using the phenol-replacing fraction. A two-step method was developed for phenol-replacing fraction separation from liquid pyrolysis products with a yield up to 15%, and this fraction was used in the phenol-formaldehyde resin synthesis. Then, a work was conducted for the removal of neutrals from the modified phenol-formaldehyde resin with organic solvents, n-hexane and benzene. As a result, benzene was defined as a more efficient solvent because it removed more aromatics, like ethers and substituted phenols, that cannot react and worsen the glue line water resistance. Benzene dissolved 3.2% weight of the resin, and n-hexane dissolved 2.5% weight. The removal of neutrals increased the water resistance coefficient by more than 60%, so neutrals have a considerable effect on the resin properties. The results can be used for production of resin from renewable feedstock with the similar properties with the traditional resin.



中文翻译:

中性对木材热解液改性酚醛树脂耐水系数的影响

本文介绍了使用苯酚替代馏分获得的酚醛树脂性能的研究结果。开发了一种两步法从液体热解产物中分离苯酚取代的馏分,收率高达15%,该馏分用于苯酚-甲醛树脂的合成。然后,进行了使用有机溶剂,正己烷和苯从改性酚醛树脂中除去中性物的工作。结果,苯被定义为一种更有效的溶剂,因为它去除了更多的芳族化合物,如醚和取代的苯酚,它们无法反应并恶化了胶水的耐水性。苯溶解了3.2%重量的树脂,正己烷溶解了2.5%重量的树脂。去除中性成分可使耐水性提高60%以上,因此中性剂对树脂性能有很大影响。该结果可用于由可再生原料生产具有与传统树脂相似性能的树脂。

更新日期:2020-09-25
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