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首页> 外文期刊>Journal of Adhesion Science and Technology: The International Journal of Theoredtical and Basic Aspects of Adhesion Science and Its Applications in All Areas of Technology >Hydrolyzed soy protein isolates modified urea-formaldehyde resins as adhesives and its biodegradability
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Hydrolyzed soy protein isolates modified urea-formaldehyde resins as adhesives and its biodegradability

机译：水解大豆蛋白分离出改性脲醛树脂作为胶粘剂及其生物降解性

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The hydrolytes soy protein isolates (HSPI)-modified urea-formaldehyde (UF) resins were synthesized via copolymerization process. The best bonding strength is 1.50MPa and improves 51.5% compared with pure UF. In addition, the formaldehyde emission decreased. The effect of (HSPI) on the biodegradable (UF) resins was investigated. Biodegradation was evaluated by composting under controlled conditions in accordance with ISO 14855. The faster degradation rate was obtained when lower hydrolysis degree of HSPI was added into the system. Characterization of the resulting samples was performed by attenuated total reflection Fourier transform infrared spectroscopy, thermo-gravimetric analysis, XRD, scanning electron microscopy, and AFM. The results showed that no evidence of biodegradation was found for UF resins. The UF modified with lower hydrolysis degree of hydrolytes soy protein isolates (HSPI) resulted in a faster degradation rate. The HSPI in the network of modified UF degraded first, which resulted in the broken of the network of HSPI-modified UF resins. The thermal stability of degraded resins was found to be enhanced as the mineralization time increased. Not only the surface of the sample was degraded, but also the crystalline regions of the samples were also decomposed. The degradation on the modified UF surface occurs mainly via the formation of holes. The roughness of the degraded surfaces of modified UF resins increases with the hydrolysis degree of HSPI decreases. The presence of HSPI has driven the degradation of urea-formaldehyde. The modified resins used as adhesives in biodegradable seedling container can be seen as a controlled release source of nitrogen fertilizer.
机译：通过共聚过程合成了水解大豆分离蛋白（HSPI）改性的脲醛（UF）树脂。最佳结合强度为1.50MPa，与纯UF相比提高51.5％。此外，甲醛释放量减少。研究了（HSPI）对可生物降解（UF）树脂的影响。根据ISO 14855，在受控条件下通过堆肥来评估生物降解。将较低的HSPI水解度添加到系统中可获得更快的降解速率。通过衰减全反射傅立叶变换红外光谱，热重分析，XRD，扫描电子显微镜和AFM对所得样品进行表征。结果表明，没有发现UF树脂发生生物降解的迹象。用较低水解度的水解大豆蛋白分离物（HSPI）改性的UF导致更快的降解速率。改性UF网络中的HSPI首先降解，这导致HSPI改性UF树脂网络的破裂。发现降解树脂的热稳定性随着矿化时间的增加而增强。不仅样品的表面被降解，而且样品的晶体区域也被分解。改性超滤表面的降解主要通过孔的形成而发生。改性UF树脂的降解表面的粗糙度随着HSPI的水解度的降低而增加。 HSPI的存在已导致脲醛的降解。在可生物降解的幼苗容器中用作粘合剂的改性树脂可视为氮肥的控释源。

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