氢炭与壳聚糖改性脲醛树脂生物复合材料的对比研究,Journal of Vinyl and Additive Technology

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氢炭与壳聚糖改性脲醛树脂生物复合材料的对比研究
Journal of Vinyl and Additive Technology ( IF 3.8 ) Pub Date : 2023-05-22 , DOI: 10.1002/vnl.22014
Mirjana Ristić ₁ , Suzana Samaržija‐Jovanović ₁ , Vojislav Jovanović ₁ , Marija Kostić ₂ , Tijana Jovanović ₃ , Gordana Marković ₄ , Marija Kojić ₅ , Ivica Vujčić ₅ , Milena Marinović‐Cincović ₅

Affiliation

为了给脲醛（UF）粘合剂科学领域提供新的见解，在这项工作中，首次用废蘑菇基质的水炭（HCUF）和壳聚糖（CHUF）对脲醛树脂进行改性，以研究这些材料的效果生物填料对原位制备的UF树脂的水解和热稳定性的影响。使用 X 射线衍射分析 (XRD)、傅里叶变换红外光谱 (FTIR)、非等温热重分析 (TG)、差热重分析 (DTG) 和差热分析 (DTA) 对改性超滤生物复合材料进行表征。CHUF 和 HCUF 生物复合材料的扫描电子显微照片 (SEM) 显示出彼此不同的球形结构，因为 CHUF 生物复合材料的表面具有明显的孔，形成网络结构。壳聚糖具有羟基和氨基，通过氢键与UF树脂键合，这一点经FTIR分析证实。CHUF生物复合材料中游离FA的含量为0.06%，而HCUF的游离FA含量更高，达到0.48%。两种改性超滤生物复合材料中释放的 FA 含量相似（CHUF 和 HCUF 分别为 2.5% 和 2.8%）。与 HCUF 生物复合材料相比，CHUF 的水解稳定性略高。热分析表明，CHUF 的热稳定性更高，因为它在比 HCUF 生物复合材料稍高的温度下开始分解。

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The comparative study of biocomposites based on hydrochar and chitosan-modified urea-formaldehyde resins

To provide new insight into the field of urea-formaldehyde (UF) adhesives science, in this work, for the first time, UF resin was modified with hydrochar of spent mushroom substrate (HCUF) and chitosan (CHUF) to investigate the effect of these bio-fillers on the hydrolytic and thermal stability of in situ prepared UF resins. The characterization of the modified UF biocomposites was performed using X-ray diffraction analysis (XRD), Fourier transforms infrared spectroscopy (FTIR), non-isothermal thermogravimetric analysis (TG), differential thermal gravimetry (DTG), and differential thermal analysis (DTA). Scanning electron micrographs (SEM) of the CHUF and HCUF biocomposites show a spherical structure that differs from each other because the surface of the CHUF biocomposite has pronounced pores that form a network structure. With its hydroxyl and amino groups, chitosan bonding to UF resin through hydrogen bonds, which is confirmed by FTIR analysis. The content of free FA in CHUF biocomposite is 0.06%, while that of HCUF is higher and amounts to 0.48%. The content of released FA in both modified UF biocomposites was similar (2.5% and 2.8% for CHUF and HCUF, respectively). The hydrolytic stability of CHUF is slightly higher compared to the HCUF biocomposite. Thermal analysis shows that the CHUF is thermally more stable because it starts to decompose at a slightly higher temperature than the HCUF biocomposite.

更新日期：2023-05-22

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