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首页> 外文期刊>Journal of thermal analysis and calorimetry >Sulfonated Kraft lignin addition in urea-formaldehyde resin: Thermokinetic analysis
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Sulfonated Kraft lignin addition in urea-formaldehyde resin: Thermokinetic analysis

机译：脲醛木质素加入尿素 - 甲醛树脂：热能分析

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摘要

Urea-formaldehyde (UF) resins are widely used over the world as an adhesive, principally in the civil construction, but its use leads to formaldehyde emissions when exposed to higher temperatures. In this way, the aim of this study was to evaluate the partial replacement of adhesives made of UF resin by sulfonated Kraft lignin, up to 30mass%, and study its effects on the mechanism and on the kinetic/thermodynamic parameters of the thermal degradation, as well as on the thermal stability of the UF resin through thermogravimetric analysis and using isoconversional methods. The results showed that the lignin addition to the UF resin was beneficial, as there was synergy between the materials and verification of enhancement of thermal stability. Aside from the changes in the thermal behavior, the probable reduction of the emission of formaldehyde in the second step of degradation of the UF resin was also observed. These results indicate that the lignin can be used as a potential material to partially replace the UF resin.
机译：尿素 - 甲醛（UF）树脂是广泛应用于世界的粘合剂，主要用于民用建筑，但其在暴露于更高的温度时，其使用导致甲醛排放。通过这种方式，本研究的目的是评估通过磺化牛皮纸由磺化牛皮蛋白制成的粘合剂的部分替代，高达30mmas％，并研究其对机制的影响和热降解的动力学/热力学参数，以及通过热重度分析和使用异组值方法的UF树脂的热稳定性。结果表明，UF树脂的木质素是有益的，因为材料之间的协同作用和热稳定性的增强。除了热行为的变化之外，还观察到甲醛在uF树脂降解第二步骤中的甲醛排放的可能降低。这些结果表明，木质素可以用作部分替代UF树脂的潜在材料。

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