期刊
ACS APPLIED MATERIALS & INTERFACES
卷 8, 期 26, 页码 16939-16949出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.6b04830
关键词
high-internal-phase emulsions; eutectic mixture; nonaqueous emulsions; polyHIPEs; oil absorption
资金
- CONACYT through Estancias postdoctorales en el extranjero program
- Catedras CONACYT program
- MINECO/FEDER [MAT2012-34811, MAT2015-68639-R]
- CONACYT [252774, 261425]
We have demonstrated that L-lactide (LLA) forms a eutectic mixture with epsilon-caprolactone (CL) in a 30:70 mol ratio with a melting point of -19 degrees C. Taking advantage of the liquid nature and polarity at the LLA CL eutectic mixture, we have formulated oil-in-eutectic-mixture high-internal-phase emulsions (HIPEs) by stepwise addition of the oil phase (tetradecane) into the continuous phase (mixture of surfactant and LLA-CL eutectic mixture) at room temperature and under stirring. The oil-in-LLA-CL-eutectic-mixture HIPEs were polymerized in the presence of both the organocatalysts 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU) and methanesulfonic acid (MSA) and the initiator benzyl alcohol (BnOH) at 37 degrees C and without the addition of any extra reagent or solvent in one single pot. The catalytic selectivities of DBU and MSA for the ring-opening polymerizations of LLA and CL, respectively, allowed the synthesis of macroporous poly(L-lactide)/poly(epsilon-caprolactone) blend materials. The resulting materials exhibited a macroporous morphology that resembled that of the RIPE internal-phase droplets used as templates. These materials proved effective as oil absorbents for oil/water separation with not only a noticeable performance, similar to that of conventional sorbents in terms of both selectivity and recyclability, but also unprecedented safe disposability, certainly of interest for applications in the cleanup of industrial oily wastewaters and oil spills, thanks to the biodegradable features of both poly(epsilon-caprolactone) and poly(L-lactide).
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据