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Method for acquiring chemical reaction kinetic equations of substances to be detected under microwave heating

A kinetic equation and chemical reaction technology, applied in the field of obtaining the chemical reaction kinetic equation of the object to be tested under microwave heating, can solve the problem of single heating method, unsuitable microwave curing of resin-based composite materials, and inability to introduce microwave curing reaction. Thermal effects and other issues, to achieve high reliability and maintain a high degree of consistency

Active Publication Date: 2017-08-15
CENT SOUTH UNIV
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Problems solved by technology

However, a large number of research results have shown that microwave radiation has a significant non-thermal effect on the chemical reaction of the resin curing process in addition to the thermal effect brought by temperature.
Due to the single heating method of the equipment itself, the conventional DSC method cannot introduce the non-thermal effect of the microwave curing reaction in the process of testing and establishing the resin curing kinetic equation, so the calculated results are not suitable for microwave curing of resin matrix composites. related research

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  • Method for acquiring chemical reaction kinetic equations of substances to be detected under microwave heating
  • Method for acquiring chemical reaction kinetic equations of substances to be detected under microwave heating
  • Method for acquiring chemical reaction kinetic equations of substances to be detected under microwave heating

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Embodiment Construction

[0026] Taking the curing of epoxy resin-based composite materials (specifically using epoxy resin carbon fiber composite materials) as an example, it is known that the basic form of its chemical reaction kinetic equation is an autocatalytic model based on a phenomenological model, and its basic form is:

[0027]

[0028] In the present invention, the chemical reaction kinetic equation of curing the epoxy resin-based composite material under microwave heating is the same form of chemical reaction kinetic equation as that under conventional heating conditions. The inventors found that this equation is a strongly coupled differential equation about time t, curing degree α and temperature T. And T itself is a function of t, so in order to obtain the four parameters A, E, m, and n of the equation, it is only necessary to know the change relationship between α-t and T-t, which can be obtained by nonlinear fitting through the particle swarm algorithm. And then solve its microwave ...

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Abstract

The invention firstly provides a method for acquiring the chemical reaction kinetic equations of substances to be detected under microwave heating. The method comprises the following steps: enabling a plurality of substances to be detected to carry out chemical reaction for different periods of time in a microwave oven, taking out and cooling each substance to be detected, testing the degree of chemical reaction by DSC after the substances to be detected react for the different periods of time, acquiring a plurality of test data according to the DSC testing, and deriving the chemical reaction kinetic equations of the substances to be detected under the microwave heating condition by carrying out nonlinear fitting by particle swarm optimization. On the whole, the invention provides the method for acquiring the chemical reaction kinetic equations of the substances to be detected under microwave heating in a pioneering manner, and concretely provides a method for acquiring the degree of cure of a microwave heating cured resin-based composite material.

Description

technical field [0001] The invention relates to the field of obtaining chemical reaction kinetic equations, in particular to a method for obtaining chemical reaction kinetic equations of a test object under microwave heating. Background technique [0002] Reaction kinetics is to study the influence of various physical and chemical factors (such as temperature, pressure, concentration, medium in the reaction system, catalyst, flow field and temperature field distribution, residence time distribution, etc.) on the reaction rate and the corresponding reaction mechanism and A subdiscipline of chemical reaction engineering such as mathematical expressions. Generally speaking, chemical reaction engineering workers mainly determine the relationship between the concentration and temperature of each component in the reactant system and the reaction rate through experimental measurements, so as to meet the needs of reaction process development and reactor design. [0003] The paramet...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N25/20
CPCG01N25/20
Inventor 湛利华李自强陈效平刘桂铭
Owner CENT SOUTH UNIV
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