十二烯基琥珀酸环糊精酯的制备及其乳化性能

Preparation of dodecenyl succinate cyclodextrin ester and its emulsifying properties

采用湿法工艺以十二烯基琥珀酸酐(DDSA)和β-环糊精(β-CD)为原料制备了十二烯基琥珀酸环糊精酯(DDS-β-CD)。通过FTIR对DDS-β-CD结构进行了表征。结果表明,DDS-β-CD的热稳定性与β-CD相比有所降低,但是分解温度仍高达225℃,满足在食品、日化、微胶囊等领域的应用;当DDS-β-CD的取代度为0.198时,所测样品质量分数为6%的水溶液透光率仍可达97%以上。取代度为0.295的DDS-β-CD的亲水亲油平衡值(HLB)为16.520,说明其具有一定的起泡能力和乳化能力,且泡沫稳定性较好,在10min时泡沫稳定性为79.08%;对植物油和液体石蜡进行乳化时,乳浊液分出10 mL溶液需要的时间分别为991和545 s;DDS-β-CD质量分数为0.5%时的水包植物油乳液的起始平均粒径为4.42μm,并具有良好的稳定性。

Dodecenyl succinic acid cyclodextrin ester(DDS-β-CD)was prepared from dodecenly succinic anhydride(DDSA)andβ-cyclodextrin(β-CD)by wet processing.The structure of DDS-β-CD was confirmed by FTIR.The results showed that DDS-β-CD had lower thermal stability thanβ-CD,however,its decomposition temperature was still as high as 225℃,which can meet its application in food,daily chemical and microcapsules.When the degree of substitution of DDS-β-CD was greater than 0.198,the transmittance of the aqueous solution with 6%mass fraction could still reach more than 97%.The hydrophile lipophilic balance(HLB)value of DDS-β-CD with a substitution degree of 0.295 was 16.520,indicating that it had certain foaming ability and emulsifying ability.The foam stability was better(79.08%).The DDS-β-CD was used to emulsify vegetable oil and liquid paraffin,and the corresponding separation time of 10 mL emulsion was 991 and 545 s,respectively.The vegetable oil-in-water emulsion containing 0.5%mass fraction DDS-β-CD had an initial average particle size of 4.42μm and showed good stability.