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The characteristics of konjac glucomannan octenyl succinate (KGOS) prepared with different substitution rates
Carbohydrate Polymers ( IF 11.2 ) Pub Date : 2017-11-14 , DOI: 10.1016/j.carbpol.2017.11.040
Fan-Bing Meng , Yun-Cheng Li , Da-Yu Liu , Geng Zhong , Xiao-Qiang Guo

The characteristics of octenyl succinic anhydride (OSA)-modified polysaccharide could be affected by its degree of reaction. Four konjac glucomannan octenyl succinate (KGOS) samples were prepared with different substitution rates (SRs) of 1.151%, 1.514%, 1.753% and 2.247%. The critical micelle concentration (CMC) of the four KGOS materials decreased with increasing SR. Fourier transform infrared (FT-IR) spectroscopy indicated that the increase in SR had little effect on the type of acyl peak. The viscosity test indicated that with SR increase, the viscosity increased slightly at low rotational speed. The emulsion capacity (EC) and stability (ES) also increased with increasing SR, but the extent of increase was not obvious when the SR exceeded 1.753%. A similar pattern was found in confocal scanning laser microscopy (CSLM) observations and ES tests of KGOS nanoemulsions. Considering the characteristics of KGOS and the economic benefits, it is preferable to prepare KGOS with an SR of 1.514% and additions of alkalizing agent and OSA (in proportion to konjac glucomannan (KGM), w/w) of 2% and 3%, respectively, during the KGOS preparation.



中文翻译:

不同取代率制备魔芋葡甘露聚糖辛基琥珀酸酯的特性

辛烯基琥珀酸酐(OSA)改性多糖的特性可能会受到其反应程度的影响。制备了四个魔芋葡甘露聚糖辛烯基琥珀酸酯(KGOS)样品,具有不同的替代率(SR),分别为1.151%,1.514%,1.753%和2.247%。四种KGOS材料的临界胶束浓度(CMC)随着SR的增加而降低。傅立叶变换红外光谱(FT-IR)表明,SR的增加对酰基峰的类型影响很小。粘度测试表明,随着SR的增加,在低转速下粘度略有增加。乳液容量(EC)和稳定性(ES)也随着SR的增加而增加,但是当SR超过1.753%时,增加的程度并不明显。在共焦扫描激光显微镜(CSLM)观察和KGOS纳米乳剂的ES测试中发现了类似的模式。考虑到KGOS的特性和经济效益,最好制备SR为1.514%的KGOS,并添加碱化剂和OSA(与魔芋葡甘露聚糖(KGM)的重量比)分别为2%和3%,分别在KGOS准备期间。

更新日期:2017-12-06
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