Boiling points of the propylene glycol plus glycerol system at 1 atmosphere pressure: 188.6-292 °C without and with added water or nicotine
Boiling points of the propylene glycol plus glycerol system at 1 atmosphere pressure: 188.6-292 °C without and with added water or nicotine
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DOI：
10.1080/00986445.2018.1468758
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发表时间：
2018-12-02
影响因子：
2.5
通讯作者：
Peyton, David H.
中科院分区：
文献类型：
--
作者：
Duell, Anna K.;Pankow, James F.;Peyton, David H.
在电子香烟（“电子尼古丁递送系统”，ENDS）中，丙二醇（PG）和/或甘油（GL;又名“植物甘油”，VG）与尼古丁的混合物被蒸发以产生含尼古丁的气溶胶。对于给定的组成，在1个大气压下沸腾液体所需的温度必须至少略高于沸点（BP）。ENDS的使用在全球范围内迅速增加，但PG + GL系统的BP特征已被表征为混合物;在此，我们重新进行了研究，但重要的是，还研究了添加水和尼古丁的影响。在1个大气压下的BP值在整个二元组合物范围内测量。基于Gibbs-Konovalov定理的拟合提供BP作为组成的函数（按摩尔百分比、按重量百分比和按体积百分比）。然后在添加剂如水（添加2.5和5摩尔%）和尼古丁（3摩尔%）的存在下测试PG + GL混合物的BP。发现水在所有测试的组合物中显著降低PG + GL混合物的BP，并且发现尼古丁降低含有类似于75 GL：25 PG（按摩尔计）或更多的PG + GL混合物的BP。检查了添加的水（添加5、10和15摩尔%）对电子香烟降解产物（一些醛和甲醛半缩醛）的影响，并且发现对于所使用的特定装置，对溶剂（PG或GL）降解没有显著影响。
In electronic cigarettes ("electronic nicotine delivery systems", ENDS), mixtures of propylene glycol (PG) and/or glycerol (GL; aka "vegetable glycerin", VG) with nicotine are vaporized to create a nicotine-containing aerosol. For a given composition, the temperature required to boil the liquid at 1 atmosphere must be at least somewhat greater than the boiling point (BP). The use of ENDS is increasing rapidly worldwide, yet the BP characteristics of the PG + GL system have been characterized as the mixtures; here we re-do this, but significantly, also study the effects of added water and nicotine. BP values at 1 atmosphere pressure were measured over the full binary composition range. Fits based on the Gibbs-Konovalov theorem provide BP as a function of composition (by mole-percent, by weight-percent, and by volume-percent). BPs of PG + GL mixtures were then tested in the presence of additives such as water (2.5 and 5 mol% added) and nicotine (3 mol%). Water was found to decrease the BP of PG + GL mixtures significantly at all compositions tested, and nicotine was found to decrease the BP of PG + GL mixtures containing similar to 75 GL: 25 PG (by moles) or more. The effect of added water (5, 10, and 15 mol% added) on electronic cigarette degradation production (some aldehydes and formaldehyde hemiacetals) was examined and found to have no significant impact on solvent (PG or GL) degradation for the particular device used.