丙二醇（IUPAC名：1,2-丙二醇）是一种合成的有机化合物，化学式为C₃H₈O₂。它是一种粘稠、无色、几乎无味的液体，带有淡淡的甜味。从化学角度看，PG含有两个羟基（-OH）基团。这一特殊的分子结构赋予它极佳的保湿性能（减少水分流失的物质），同时也是我们行业中极为重要的优异溶剂。PG is classified by the United States Food and Drug Administration (FDA) as "Generally Recognized As Safe" (GRAS) for use as a food additive [1]. It is utilized globally in pharmaceuticals, cosmetics, and food production. In the e-liquid manufacturing process, PG is universally recognized as the primary carrier for flavorings.
2. 植物甘油（VG）
植物甘油（IUPAC名：丙三醇），亦称甘油，是一种天然存在的有机化合物，来源于大豆油、棕榈油或椰子油等植物油。其化学式为C₃H₈O₃，具有三个羟基（-OH）官能团，较之PG的两个多出一个。This additional hydroxyl group profoundly impacts VG's physical state. It is significantly more viscous (thicker) than PG, highly hygroscopic (absorbs water from the air), and possesses a distinct, innate sweetness. While VG is also categorized as GRAS and used extensively in the food and medical industries [2], its primary role in vaping is vapor production—creating the dense, voluminous clouds that sub-ohm vapers desire.
二、溶解度
在谈及电子液配方之时， Solubility is arguably the most critical metric for evaluating a base liquid's capacity to carry flavor. Solubility refers to the chemical property referring to the ability of a given substance (the solute, in this case, our flavoring compounds) to dissolve in a solvent (the PG or VG base).
The chemical ability to dissolve a flavor is only half the battle; the other half is how efficiently that flavor is transferred from the device to the user's sensory receptors. Taste Delivery涉及蒸发的物理学以及人体嗅觉与味觉的生物机制。
1. 电子烟中风味感知的机制
What we perceive as "flavor" when vaping is a combination of taste (detected by the taste buds on the tongue: sweet, salty, sour, bitter, umami) and smell (detected by the olfactory receptors in the nasal cavity via retro-nasal olfaction). To experience the flavor, the aromatic compounds suspended in the e-liquid must be efficiently vaporized and carried by the aerosol to these biological receptors.
2. PG如何传递风味
丙二醇（PG）的沸点约为188.2℃，低于VG（约290℃）[3]。此外，凭借其低粘度和高导热性，PG蒸发速度远快于VG，所需能量也更少。When PG vaporizes, it creates a finer, warmer aerosol. Because PG is virtually tasteless and odorless, it acts as a transparent "blank canvas" for the flavor. It carries the volatile flavor molecules seamlessly to the olfactory bulb and taste receptors without interfering with the profile. This is why high-PG e-liquids are prized by "flavor chasers." The transmission of taste is sharp, immediate, and true to the original flavoring concentrate. Whether you are using a delicate botanical extract or a sharp, acidic berry blend from our product catalog，PG确保口感轮廓清晰鲜明，层次分明。
3. The "Throat Hit" Phenomenon
An integral part of the sensory experience, especially for users transitioning from traditional combustible tobacco, is the "throat hit"—the physical sensation felt in the back of the throat upon inhalation. PG is primarily responsible for this sensation. For the Russian market, where the transition from traditional tobacco to vaping remains a massive consumer trend, maintaining a satisfying throat hit is crucial for product retention. Formulations designed with an adequate PG ratio simulate the familiar physical sensation of smoking while delivering precise flavor profiles.
Aerosol Density:VG vaporizes into massive, dense droplets. These heavy aerosol particles tend to coat the tongue and the inside of the mouth. While this creates a smooth, velvety mouthfeel, it physically obstructs the taste buds and olfactory sensors. The flavor compounds are trapped within the heavy VG aerosol and are exhaled before they can be fully registered by the brain's sensory receptors.
在分析时 pg vs vg flavor传递过程中，VG会大幅削弱并改变预期的口感轮廓，导致制造商不得不使用更高比例的风味浓缩液（在Max VG混合物中高达20-25%），以达到高PG混合物在10%时所能实现的相同浓度。
If an e-liquid has a VG content that is too high for cold climates, it will fail to flow properly inside the user's vaping device. The liquid becomes too thick to be absorbed by the organic cotton wicks inside the atomizer coil. When the user fires the device, the coil heats up, but because the liquid cannot wick fast enough to replace what was vaporized, the cotton burns. This results in an excruciatingly harsh, foul-tasting phenomenon known as a "dry hit."干烧一口，便会彻底破坏味觉盛宴。故而，专为俄罗斯市场调配电子液体的品牌，极力建议提升PG比例，尤其是在冬季或用于小型雾化器的产品中。更高的PG含量，确保液体始终保持足够的稠度，能在各种环境温度下高效导油，完好无损地传递每一丝风味。
风味与烟雾对比信息图
五陈化艺术：时间与化学结合的奥秘
In e-liquid manufacturing, "steeping" is the process of allowing the base liquids, nicotine, and flavor concentrates to homogenize and mature over time. It is essentially controlled chemical aging.由于化学结构与溶解性上的差异，PG与VG在陈化工艺上需采取不同的方案。
High PG formulations浸泡速度极快。低粘度使得风味分子能迅速扩散并与基础液结合。高PG的电子液通常在数日内即可达到最佳风味状态。
High VG formulations需经过长时间的浸泡。VG的浓稠粘稠极大地减缓了风味分子的扩散。生产商常用机械均质器、超声波浴或缓慢加热等手段，促使风味分子与VG结合。即使如此，高VG的甜品或烟草风味仍可能需要3至6周的陈化，方能达到预期的成熟度。
若高VG液体未经过充分陈化便匆忙推向市场，用户将体验到味道淡薄、支离破碎。为追求快速生产与缩短仓储时间的制造商，提高PG比例，能大幅缩短从生产到销售的周期，且不影响风味品质。若想深入了解如何优化生产周期与掌握浸泡技艺，敬请探索我们提供的丰富技术资源。 industry blog.
六定义市场成功的理想比例
Knowing that PG is the superior flavor carrier and VG is the superior vapor producer, the goal for any commercial e-liquid brand is to find the perfect synergistic ratio that meets the demands of their target demographic. There is no single "perfect" ratio, but rather optimal ratios dictated by the hardware used and the user's ultimate goal.
理解背后的科学原理 pg vs vg flavor动力学仅是理论框架，实际应用则需甄选品质无可妥协的原料。即便是完美的PG/VG比例，也无法挽救使用劣质、化学刺激性强或浓度过度稀释的风味浓缩液的配方。在我们先进的制造工厂中，专注于提取与合成行业内最强大、浓度最高的风味化合物。我们的香精经过精心设计，能在高PG或平衡PG/VG的基础液中完美悬浮，确保分子稳定、长久保存，并带来无与伦比的味觉盛宴。无论您是在调制一系列清新锐利的薄荷水果混合，以抵御西伯利亚寒冬，还是为高端莫斯科市场打造浓郁复杂的烟草珍藏，我们的技术团队都随时准备协助您完善配方。我们深谙俄国及独联体市场的独特需求，产品亦为量身定制，旨在满足那些严苛的标准。
第九章结论：风味的终极裁决
为了明确回答这个问题——PG vs VG: Which one carries flavor better?——科学已给出明确的答案： Propylene Glycol (PG).凭借其极性分子结构、低粘度、优异的溶解性以及无固有味道或气味，PG成为挥发性风味化合物的理想载体。它在分子层面与风味分子紧密结合，确保混合物稳定均匀，蒸发纯净，能够忠实传递预期的味觉与嗅觉体验。植物甘油（VG）虽对电子烟体验至关重要，凭借其优良的气化特性与顺滑口感，却也成为了风味的屏障。其高粘度、低溶解性与天然的甜味，削弱、改变并困住了复杂的风味细节。For e-liquid manufacturers, the key to a successful, highly-rated product line lies in respecting the chemistry. Utilize PG to act as your flavor's messenger, and use VG to tailor the cloud production and throat hit to your specific hardware target. By mastering this balance, and by utilizing world-class flavor concentrates, you guarantee a premium sensory experience for your customers.
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