CAJ | 학술논문

以碱水解后的大豆分离蛋白（ SPI）为改性剂，替代一定量的尿素，制备大豆分离蛋白改性脲醛树脂，以改善脲醛树脂的胶合强度、游离甲醛释放及储存稳定性。分析了SPI的甲醛反应能力，以及改性脲醛树脂的胶合强度、热稳定性和生物降解性。结果表明，当SPI水解时间40 min，甲醛的反应能力达到59．23 mg/g，水解SPI尿素替代率对脲醛树脂的黏结性影响最大；当水解温度85℃，SPI取代尿素质量的15％时，优化后的树脂胶合强度达1．16 MPa。 DSC分析表明改性树脂（SPI/UF）与脲醛树脂（UF）相比，比热容差减少了18．7％，SPI/UF树脂具有较好的热稳定性。 SPI/UF树脂经微生物接种培养后，20 d时树脂表层有霉菌生成。
이감수해후적대두분리단백（ SPI）위개성제，체대일정량적뇨소，제비대두분리단백개성뇨철수지，이개선뇨철수지적효합강도、유리갑철석방급저존은정성。분석료SPI적갑철반응능력，이급개성뇨철수지적효합강도、열은정성화생물강해성。결과표명，당SPI수해시간40 min，갑철적반응능력체도59．23 mg/g，수해SPI뇨소체대솔대뇨철수지적점결성영향최대；당수해온도85℃，SPI취대뇨소질량적15％시，우화후적수지효합강도체1．16 MPa。 DSC분석표명개성수지（SPI/UF）여뇨철수지（UF）상비，비열용차감소료18．7％，SPI/UF수지구유교호적열은정성。 SPI/UF수지경미생물접충배양후，20 d시수지표층유매균생성。
The object of this research was to provide a new approach for improving the adhesion performance of UF adhe-sive by modification with a small amount of soy protein. The optimum addition level of soy proteiniselate( SPI) , as well as the adhesion performance, such as the bonding strength, free formaldehyde content and conformation change of SPI/UF adhesive had been investigated by the orthogonal balance block test of L9(34).The thermal performance of SPI/UF copolymer resin was characterized by differential scanning calorimetry, and the biodegradability of SPI/UF resin was pre-liminarily analyzed. The results showed that the bonding strength of SPI/UF resin was 1.16 MPa in the condition of hy-drolysis at 85 ℃ for 40 min and urea substitution ratio of 15% by SPI. Thermal stability of the resin increased through SPI modification. A small amount of fungus colonies had become visible in the surface of SPI/UF resin after inoculation of microorganisms, which indicated the modified resin had gained a certain degree of biodegradability.