Octenylsuccinate cyclodextrin ester (OS-β-CD) with a high substitution degree is prepared from octenylsuccinic anhydride (OSA) and β-cyclodextrin (β-CD) by means of the optimized heterogeneous reaction.The characteristic peaks of the samples before and after modification are compared by FT-IR,indicating that octenylsuccinate cyclodextrin ester is successfully obtained.It is found through thermogravimetric analysis (TGA) that the modified samples have a declined thermal stability,but their thermal stability is enough to support its application in many aspects.Compared with β-cyclodextrin,OS-β-CD shows a significantly improved solubility in cold water.The transmittance of the solution is still as high as 90% when the mass fraction of OS-β-CD is 15%.With the increasing addition amount of anionic group of octenylsuccinic acid within molecular chain section,the surface tension of the solution drops,with the lowest value reaching 44.09 mN·m-1.The electrostatic repulsion between molecules and the increase of branching degree inhibit the rearrangement of OS-β-CD,and promote the anti-freeze thaw stability of the esterification solution.
AN Ying-jie, WANG Ruo-lin, LI Tian-tian, XU Yu-feng, NIU Chun-mei
. Preparation of octenylsuccinic acid cyclodextrin ester with a high substitution degree and study on its properties[J]. Modern Chemical Industry, 2021
, 41(5)
: 158
-162
.
DOI: 10.16606/j.cnki.issn0253-4320.2021.05.032
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