CAJ | 학술논문

用吐温-20作分散剂,用正交试验研究辛烯基琥珀酸马铃薯淀粉酯的生产条件,并采用红外光谱仪和扫描电镜对产品的结构和外观进行分析.结果表明:最佳生产条件为淀粉乳质量分数40%、温度30℃、pH7.5～8.0、酸酐质量分数5%;产品红外光谱图显示在1651cm~(-1)和573cm~(-1)处吸收峰加强,1558cm~(-1)和1730cm~(-1)处出现RCOO-和＞C=O的特征吸收峰,表明淀粉变性后引入了新基团;扫描电镜显示淀粉颗粒表面明显侵蚀,表面积增大.
용토온-20작분산제,용정교시험연구신희기호박산마령서정분지적생산조건,병채용홍외광보의화소묘전경대산품적결구화외관진행분석.결과표명:최가생산조건위정분유질량분수40%、온도30℃、pH7.5～8.0、산항질량분수5%;산품홍외광보도현시재1651cm~(-1)화573cm~(-1)처흡수봉가강,1558cm~(-1)화1730cm~(-1)처출현RCOO-화＞C=O적특정흡수봉,표명정분변성후인입료신기단;소묘전경현시정분과립표면명현침식,표면적증대.
Octenyl succinate anhydride(OSA)-modified potato starch was synthesized by base-catalyzed reaction of octenyl succinate anhydride with granular starch in aqueous suspension using Tween-20 as dispersing agent.An orthogonal array design involving 4 factors(starch concentration,OSA concentration,reaction temperature,pH value)at 3 levels was employed to optimize the reaction conditions.The structure of OSA potato starch was characterized with fourier-transform infrared spectroscopy(FTIR)and scanning electron microscopy(SEM).Optimum degree of substitution(DS)was obtained when the reaction was performed between 40% potato starch slurry and 5% OSA at 30℃,pH 7.5-8.0.FT-IR spectrum of OSA starch showed the intensified absorption peaks at 1651 cm~(-1) and 573 cm~(-1),and characteristic absorption peaks of RCOO-at 1558 cm~(-1) and ＞C=O at 1730 cm~(-1),which suggest the formation of ester.SEM image showed that OSA potato starch granular had rougher surface than native potato starch,and thus had higher specific surface area.