烷基木糖苷物化性能研究

Study of physical and chemical properties of alkyl polyxylosidase

分别对不同长度碳链和平均聚合度(DP)的烷基木糖苷(AX)进行性能评价,结果表明,AX可将水的表面张力降低到26 m N/m以下,随碳链长度增加,AX临界胶束浓度(cmc)减小,饱和吸附量(Г_(max))降低,且Г_(max)高于相同碳链的烷基葡糖苷(APG),AX的发泡力、泡沫稳定性、抗硬水能力及润湿性能均优于相同碳链的APG。随DP的增大,AX平衡表面张力(γ_(cmc))及cmc均增大,Г_(max)呈降低趋势,DP对发泡力的影响有限,DP的降低使得AX的抗硬水能力、润湿力和乳化能力有所提高。

The properties of alkyl polyxylosidase （AX） with different carbon chain length and average polymeriza6on degree （DP） were evaluated. The results show that AX can reduce the surface tension of water to below 26 mN/m. The critical micelle concentration （cmc） and surface excess concentration （Fmax ） of AX are decreased with the increasing length of carbon chain, and the F is higher than that of alkyl polyglycoside （APG） with the same carbon chain. The foaming ability, foam stability, hard water resistance and wetting power of AX are all superior to that of APG with the same carbon chain. With the increase of DP of AX,the cmc and the surface tension at cmc （γcac ） are both increased, and the F is decreased. The DP of AX has no significant effect on the foaming ability. However, the hard water resistance, wetting power and emulsifying ability of AX are enhanced with the decrease of DP.