E-liquid formula detection analysis

With the promulgation and implementation of smoking bans in major cities in China, Vape is gradually becoming familiar to many ordinary smokers and is widely used as a smoking cessation product or as a substitute for traditional cigarettes. Traditional cigarettes generate smoke through the high temperature combustion of tobacco, and Vape supplies electricity to the heating wire through the power supply device to heat it, heat the e-liquid, atomize the smoke oil containing nicotine and flavor into particles, and pump it to produce simulated smoke. Vape's atomization temperature is much lower than that of traditional cigarette tobacco. Vape's smoke contains no toxic and harmful components such as tar and CO, and it does not produce second-hand smoke. Therefore, Vape is increasingly favored by the market.

e-liquid is the most important part of Vape, which determines the taste, flavor and consumer experience of Vape. There are generally five major types of raw materials, which are:

1, propylene glycol (PG), common drugs and food additives. It has hygroscopicity, slightly sweetness, colorless and odorless transparent liquid, and has good fluidity. PG is one of the basic components of e-liquid. Its main function is to serve as a carrier for flavors. It enhances the taste of e-liquid. It generates a small amount of mist after heating and has a certain sense of throat. It also has diluted glycerin and reduces smoke oil. Viscosity, which increases the juice conductivity.

2, glycerin (VG), VG has high hygroscopicity, very viscous, and poor fluidity. The main role is to produce smoke.

3, flavor, the role of flavor in tobacco oil is very important, the proportion and mix of flavors of different flavors, determine the flavor of e-liquid.

4, nicotine, the main role is to alleviate the cravings, produce a sense of throat, and has a certain role in improving the taste of smoke and juice.

5, additives, including sweeteners, sour agents, throat, deionized water and so on. The main function is to improve the taste of the smoke oil and make up for the deficiency of the essence.

Due to the diversity and playability of e-liquid and smoking equipment, Vape has rapidly developed into a youth subculture, and many people have changed from "users" to "fans." Some people prefer Vape's taste and enjoy a variety of smoke and oil flavors and smoke impact on the mouth; some prefer Vape's cool, like big smoke, and socialize by "playing the smoke circle."

The significance of viscosity measurement and rheological study

Viscosity is an important factor affecting the flowability of e-liquid and the oil conductivity of Vape atomizers. Increasing the amount of glycerin in the smoke oil can significantly increase the smoke concentration during the smoking process, but the viscosity of the glycerin is large, which may cause some oil-based atomizers to lead to poor oil. It is necessary to improve the smoke oil by adding deionized water or propylene glycol. Mobility; increasing the amount of propylene glycol can improve the taste and throat sensation of the smoky oil, but it may cause the viscosity of the smoky oil to be too low. It is necessary to add glycerin or food grade thickener to keep the smog in the cartridge. In the absence of outflows.

E-liquid viscosity determination

The value of e-liquid products is generally high, so Ametek-Brookfield recommends a small sample adapter (SSA) + TC series circulating water bath system for e-liquid viscosity testing.

The small sample adapter is designed for viscosity testing with low sample volume or high sample value. The required sample volume is only 2-16 mL (the specific sample volume is related to the rotor model used), which can effectively save the test cost. SSA uses the coaxial cylindrical rotor and the matching sample cup to calculate the shear rate and shear stress to obtain the absolute viscosity. The sample cup is installed in the water bath jacket and externally connected to the circulating water bath to facilitate temperature control during the test. The temperature control accuracy of the TC series circulating water bath system is up to 0.01 ° C, providing accurate and stable temperature conditions for viscosity testing.

The DV3TLV+SSA+TC650-SD water bath was used to test the viscosity of three e-liquids at a temperature of 22 ° C. The TC650-SD water bath circulation system was used to control the sample temperature, and the Rheocalc T software was used for program editing and data acquisition. The test results were as follows. Figure 2 shows.

Using “Multi Point” to collect data and observe instrument stability and data fluctuations during the test, the Brookfield Digital Viscometer's unique continuous sensor ensures the real-time and accuracy of test data output. The average of the test results was obtained using the "Test Averaging" function, and the viscosities of the three e-liquids were 55 cP, 1147 cP, and 239 cP, respectively.

Application overview

As one of the world's known viscometer/rheometer manufacturers, Ametek-Brookfield is committed to providing customers with consistent quality, high measurement accuracy and good repeatability. The Brookfield Viscometer measures up to ±1% of the full-scale measurement range with repeatability of ±0.2%. For individual viscosity testing needs, we offer a personalized solution that perfectly fits the analytical needs of users in a variety of industries.

The RST rheometer offers comprehensive rheology testing for perfect rheology analysis in both quality control and R&D. The RST series rheometer has two modes of controlling shear rate and shear stress, and is especially suitable for measuring the viscosity and rheological curve of non-Newtonian fluid under steady flow. In addition, it can measure rheological properties such as viscoelasticity, yield stress and thixotropic properties in unsteady shear flow and creep conditions.

"Hangboo is a leading e-liquid manufacturer and e-liquid supplier with factory locations in Guangdong Province, China. We provide Wholesale e-liquid and OEM e-liquid businesses worldwide."