In the fields of biomedicine and intelligent materials, thermosensitive hydrogels rely onThe unique characteristic of "thermal deformation" has become a "hot commodity" in scientific research and industry - from targeted drug carriers to wound dressings, from3DFrom printing brackets to flexible sensors, every breakthrough in its application cannot be separated from temperature control-Accurate control of the relationship between mechanical properties.

Why can't temperature sensitive hydrogel be measured without rheometer?

The core charm of temperature sensitive hydrogel is"Response to temperature change": when the ambient temperature crosses a specific critical value, it will change from a sol state to a gel state (or vice versa), accompanied by significant changes in mechanical properties such as elasticity, viscosity, strength, etc. These properties directly determine the use scenarios of hydrogels - for example, hydrogels used for injection and administration need to maintain low viscosity at room temperature for injection（37℃Quickly form adhesive on both sides and maintain sufficient elasticity to wrap the medication; The hydrogel used for skin dressing needs to maintain moderate softness and adhesiveness at body temperature, and has certain shear resistance.

Uncover the temperature sensitive hydrogelThe "deformation law" and Baosheng rheometer are reliable detection tools.

Baosheng rheometerRole in hydrogel determination

Measurement process

Sample preparation: evenly load the temperature sensitive hydrogel solution (or gelled sample) into the measuring fixture of the rheometer to ensure that the sample thickness is consistent and avoid bubble interference.

Temperature control setting: Start the temperature control system of the Baosheng rheometer and set a suitable temperature rise/Cooling rate (e.g. per minute)1–2 ℃）Covering the expected range of phase transition temperatures.

Measurement indicators:

Storage modulus（G′）: Reflect the elastic characteristics of hydrogel.

Loss modulus（G″）: Reflects the viscous behavior of the hydrogel.

Modulus Intersection Point:When the temperature rises,G′andG″The intersection of-Gel transition temperature.

Viscosity change:Reveal the changes in fluidity of materials during heating or cooling processes.

Data analysis: the rheological curve obtained is corresponding to the temperature curve to judge the critical transition temperature and mechanical stability of the hydrogel.