摘要
探讨了C16OH／AEO-3复配比例、温度、时间、环境因素等对分子膜抑制水分蒸发效果的影响。研究结果表明，当温度为25℃，膜表面浓度为8．0×10^2g／m^2时，C16OH的抑制率最高仅为35％，引入AEO-3后，当C16OH／AEO-3的复配比例为7：3时，抑制率最高可达60％以上。室外实验表明，混合膜在膜表面浓度为4．0×10^-1g／m^-2时，15d后仍有一定的抑制效果，抑制率依旧保持在30％以上。此外，在15℃-40℃的温度范围内，混合膜的抑制率高于C16OH，显示出更好的抑制水分蒸发能力。透气性测试结果表明，C16OH和混合膜均不妨碍气水界面的氧气交换。分子膜的AFM图像显示，混合膜能形成比C16OH更为凝聚的分子膜，产生更为理想的抑制水分蒸发效果。
The effect of mixed ratios of C16 OH and AEO -3, environmental temperature, time and environmental factors on the rate of retardation of water evaporation with monolayers is discussed in this paper. The results show that the percentage resistance of water evaporation at 25℃ is only 35% , when the surface concentration of pure C16OH monolayer is 8.0×10^2g/m^2. But when AEO -3 is introduced and the mixed ratio of C16 OH and AEO -3 is 7 ： 3, the percentage resistance is over 60%. Besides, outdoor experiments show that the percentage resistance of mixed monolayers is still over 30% after 15 d, while the surface concentration of monolayer is 4.0×10^-1g/m^-2. The mixed monolayers show an enhanced effect on the retardation of water evaporation and the ability of anti - temperature interference for the higher percentage resistance ranging from 15℃ to 40℃. Air permeability experiments show that such film will not hinder oxygen exchange at the air/water interface. AFM images indicate that the mixed monolayers can form a more condensed film compared with pure CI6OH monolayers and have an enhanced effect on the retardation of water evaporation.
出处
《盐业与化工》
CAS
2009年第3期28-30,34,共4页
Jounral of Salt and Chemical Industry
基金
天津市高等学校科技发展基金资助项目(20060513)
关键词
脂肪醇聚氧乙烯醚
十六醇
混合不溶膜
透气性
抑制水分蒸发
polyoxyethylene alkyl ether
1 - hexadecanol
mixed monolayers
air permeability
retardation of water evaporation
