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Thermoplastic resin acidity detection device and acidity detection method

A thermoplastic resin and detection device technology, which is applied in material analysis by observing the influence of chemical indicators, and analysis by chemical reaction of materials, etc., can solve the problems affecting the comprehensive performance of the diaphragm, the impact of battery performance, and precipitation.

Pending Publication Date: 2020-11-06
JIANGSU HORIZON NEW ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the lithium battery industry, during the preparation of the diaphragm, in order to prevent equipment corrosion due to excessive acidity, the raw material manufacturer of the diaphragm will add a certain amount of alkaline substances for neutralization to reduce the risk of corrosion, but adding too much alkaline substances, It will cause precipitation in the production process, which will inevitably affect the overall performance of the separator, and even have a greater impact on the performance of the battery
In order to ensure the comprehensive performance of the diaphragm, manufacturers of diaphragm raw materials will properly sacrifice the acidity requirements of raw materials, which leads to uneven acidity of raw materials, which seriously affects the production and preparation of diaphragms.

Method used

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  • Thermoplastic resin acidity detection device and acidity detection method
  • Thermoplastic resin acidity detection device and acidity detection method
  • Thermoplastic resin acidity detection device and acidity detection method

Examples

Experimental program
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Effect test

Embodiment 1

[0016] Manufacturers of diaphragm raw materials generally use Zigler-Natta catalysts to produce thermoplastic resins. Zigler-Natta catalysts are mainly composed of Mg, Al, Ti, Cl and other components, and their molecular formula is shown in the following formula.

[0017] Due to the existence of active chlorine, there will be a small amount of residue in the resin product, which will exist in the atmosphere in the form of HCl during the use of raw materials, causing acidity corrosion. For the above questions, see figure 1 , the present embodiment 1 provides a thermoplastic resin acidity detection device, including: a pretreatment mechanism 1 with a storage chamber 11, a gas collection mechanism 2 connected to the storage chamber 11, and a pH detection mechanism connected to the gas collection mechanism 2 3; wherein the pretreatment mechanism 1 is suitable for pretreating the thermoplastic resin in the storage chamber 11 to generate gas (mainly acid gases such as HCl); the ga...

Embodiment 2

[0038] On the basis of Example 1, this Example 2 provides a method for detecting the acidity of a thermoplastic resin, including: pretreating the thermoplastic resin to generate gas; collecting the gas; transporting the collected gas to a pH detection mechanism to detect the gas pH value.

[0039] Optionally, the pretreatment of the thermoplastic resin includes: heating the thermoplastic resin to generate gas. In addition, adding the thermoplastic resin into the solvent and then heating can improve the uniformity of heating. Wherein the solvent includes at least one of methanol, ethanol, methyl ethyl ketone, isopropanol, toluene and acetone. The mass fraction of methanol is not less than 99.6%, the mass fraction of ethanol is not less than 99.8%, the mass fraction of methyl ethyl ketone is not less than 99.97%, the mass fraction of isopropanol is not less than 99.8%, the mass fraction of toluene is not less than 99.97%, and the mass fraction of acetone is not less than 99.7%....

Embodiment 3

[0042] The pretreatment parameters in the thermoplastic resin (such as heating temperature, heating time, heating method, solvent, etc.) have a great influence on the amount of gas generated in the storage chamber, especially the heating temperature, heating time, and solvent determine the acidity of the thermoplastic resin. Whether all the gas is released will affect the detection accuracy of the acid gas (HCl) content in the thermoplastic resin. Therefore, this embodiment 3 tests the influence of pretreatment parameters on the detection of HCl content from the following aspects.

[0043] (1) The effect of changing the heating temperature and heating time on the detection of HCl content.

[0044] Adopt different embodiments (mainly the change of heating temperature and heating time) to carry out grouping treatment to thermoplastic resin, pretreatment parameter is as shown in table 1, and HCl content detection result is as table 2 and figure 2 shown. The specific operation ...

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Abstract

The invention belongs to the technical field of diaphragms, and particularly relates to a thermoplastic resin acidity detection device and an acidity detection method. The thermoplastic resin aciditydetection device comprises a pretreatment mechanism provided with a storage chamber, a gas collection mechanism communicated with the storage chamber, and a PH detection mechanism communicated with the gas collection mechanism, wherein the pretreatment mechanism is suitable for pretreating thermoplastic resin in the storage chamber to generate gas; the gas collection mechanism is suitable for collecting gas generated by the storage chamber and conveying the gas to the PH detection mechanism; and the PH detection mechanism is suitable for detecting the acidity value of the gas so as to indirectly reflect the acidity condition of the raw material thermoplastic resin through the content of HCl in the gas, and then the PH detection mechanism is used for controlling the process and the raw material.

Description

technical field [0001] The invention belongs to the technical field of diaphragms, and in particular relates to a thermoplastic resin acidity detection device and an acidity detection method. Background technique [0002] In the lithium battery industry, during the preparation of the diaphragm, in order to prevent equipment corrosion due to excessive acidity, the raw material manufacturer of the diaphragm will add a certain amount of alkaline substances for neutralization to reduce the risk of corrosion, but adding too much alkaline substances, It will cause precipitation in the production process, which will inevitably affect the overall performance of the separator, and even have a greater impact on the performance of the battery. In order to ensure the comprehensive performance of the diaphragm, manufacturers of diaphragm raw materials will properly sacrifice the acidity requirements of raw materials, which leads to uneven acidity of raw materials, which seriously affects...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/80
CPCG01N21/80
Inventor 张叶青翁星星陈朝晖贡晶晶
Owner JIANGSU HORIZON NEW ENERGY TECH CO LTD