摘要
用重量吸收法测定了298.15,303.15,308.15K下乙醇蒸气在PPEK,PPES,PPESK膜中吸收和解吸动力学数据.结果表明,随着温度的升高,乙醇在膜中的吸收/解吸行为由Non-Fick扩散向Fick扩散转变,乙醇蒸气在三种膜中吸收速度v(PPES)>v(PPESK)>v(PPEK),解吸速度v(PPEK)>v(PPESK)>v(PPES).
The sorption and desorption curves of ethanol vapor in PPES,PPEK,PPESK membranes at 293.15 K, 298.15 K, 303.15 K have been measured using gravimetric sorption method(GS). It has been shown that the diffusion types are transferred from the non-Fickian diffusion to the Fickian diffusion as temperature increases. The tendency of sorption velocities of ethanol vapor in three kinds of the membranes were v(PPES)>v(PPESK)>v(PPEK) and the tendency of desorption velocities of ethanol vapor in three kinds of the membranes were v(PPEK)>v(PPESK)>v(PPES).
出处
《膜科学与技术》
CAS
CSCD
北大核心
2005年第3期39-44,共6页
Membrane Science and Technology
基金
国家自然科学基金资助项目(20276034)
国家重点基础研究发展规划项目(973计划)(2003CB615701)
国家高技术研究发展计划项目(863计划)(2003AA328020)资助
