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Preparation method of alkaline battery negative gel and alkaline battery negative gel

A technology of alkaline batteries and gelling agents, applied in the field of polymers, can solve the problems affecting the impact resistance of alkaline batteries, storage and transportation performance, processing and filling performance, reducing the crosslinking uniformity of products, and difficult control of polymerization reactions, etc., to achieve Effect of good performance, short gelation time, excellent impact resistance

Active Publication Date: 2017-03-01
GUANGZHOU TINCI MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the synthesis processes are to dissolve all the components in the solvent and carry out the polymerization reaction in a "one pot" method. Such a synthesis method makes the polymerization reaction difficult to control, and may cause explosion due to the accumulation of polymerization heat due to the high concentration of the initiator. More importantly, this synthesis method will reduce the crosslinking uniformity of the product, which will inevitably affect the impact resistance, storage and transportation performance, processing and filling performance of the alkaline battery containing the gel.

Method used

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  • Preparation method of alkaline battery negative gel and alkaline battery negative gel
  • Preparation method of alkaline battery negative gel and alkaline battery negative gel
  • Preparation method of alkaline battery negative gel and alkaline battery negative gel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] In a 1000mL five-necked flask equipped with a glass air guide tube, a reflux condensing device, a stirrer, and a thermometer, add 100g of acrylic acid, 590g of benzene, and 0.4g of polyoxyethylene (30) dipolyhydroxystearate. Under stirring, the temperature was raised to 70°C.

[0033] Dissolve 0.6g of bis(3,5,5-trimethylhexanoyl) peroxide in 60g of benzene, then dissolve 0.94g of pentaerythritol triallyl ether in 40g of benzene; -trimethylhexanoyl) and pentaerythritol triallyl ether started to drop at the same time, wherein bis(3,5,5-trimethylhexanoyl) peroxide was added dropwise for 4h, pentaerythritol triallyl ether was added dropwise for 3h, The reaction temperature was 70°C. After all the dropwise addition was completed, the reaction was terminated after the temperature was kept at 70° C. for 2 h.

[0034] After the reaction, the reaction slurry was suction-filtered, and then dried in a vacuum oven for 12 hours at a drying temperature of 90° C. and a pressure of -...

Embodiment 2-7

[0036] In a 1000mL five-necked flask equipped with a glass air guide tube, a reflux condensing device, a stirrer, and a thermometer, add 100g of acrylic acid, 590g of benzene, and 0.4g of polyoxyethylene (30) dipolyhydroxystearate. Heat up to the reaction temperature as recorded in Table 1 under stirring.

[0037] The initiator as recorded in Table 1 was dissolved in 60g of benzene, and the crosslinking agent as recorded in Table 1 was dissolved in 40g of benzene. The initiator of embodiment 2-7 and cross-linking agent start dropwise simultaneously, and dropwise time and reaction temperature are as recorded in table 1.

[0038] After all the dropwise addition was completed, the reaction was terminated after 2 h at the heat preservation temperature recorded in Table 1. After the reaction, the reaction slurry was suction-filtered, and then dried in a vacuum oven for 12 hours at a drying temperature of 90° C. and a pressure of -0.095 MPa. After drying, a white powder gel was obt...

Embodiment 8

[0043] In a 1000mL five-neck flask equipped with a glass air guide tube, reflux condensing device, stirrer, and thermometer, add 100g of acrylic acid, 590g of benzene, 0.5g of methacrylic acid, and 0.4g of polyoxyethylene (30) dipolyhydroxystearate , stirred and heated to 70°C under the condition of blowing nitrogen.

[0044] Dissolve 0.6 g of bis(3,5,5-trimethylhexanoyl) oxide in 60 g of benzene, and dissolve 0.94 g of pentaerythritol triallyl ether in 40 g of benzene. Mix the above two solutions evenly and drop them together for a total of 3 hours. The reaction temperature is 70°C. After the dropwise addition, keep warm at 70°C for 2 hours to end the reaction.

[0045] After the reaction, the reaction slurry was suction-filtered, and then dried in a vacuum oven for 12 hours at a drying temperature of 90° C. and a pressure of -0.095 MPa. After drying, a white powder gel was obtained.

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Abstract

The invention discloses an alkaline battery negative electrode gel preparation method which specifically comprises the following steps: 1) under the protection of nitrogen, adding unsaturated carboxylic acid monomer, organic solvent and dispersing agents to a reactor, stirring the mixture and heating the mixture to the temperature of 55-80 DEG C; 2) adding a solution comprising an initiator and a solution comprising a cross-linking agent to a reaction system in the step 1) in a dropping manner, and conducting reacting for 2-10 hours; and 3) after the reaction is finished, carrying out suction filtration and drying, and thus the alkaline battery negative electrode gel is obtained. The obtained alkaline battery negative electrode gel is uniform in crosslinking. Meanwhile, the invention also provides the alkaline battery negative electrode gel obtained by using the preparation method. When the alkaline battery negative electrode gel is applied to the negative electrode of an alkaline battery, the obtained gel negative electrode suspension zinc powder is strong in capability and good in impact resistance of the alkaline battery. Meanwhile, by using the alkaline battery negative electrode gel, the production process of the battery is allowed to be simper, and the battery processing difficulty is reduced.

Description

technical field [0001] The invention relates to the technical field of macromolecules, and provides a preparation method of an alkaline battery negative electrode gel and the alkaline battery negative electrode gel prepared by the method. Background technique [0002] Alkaline batteries are one of the best performing primary batteries and have become the most common battery varieties in the market. At present, the annual output of major alkaline battery manufacturers is in the hundreds of millions to several billions, which shows that the market for alkaline batteries is huge. [0003] The negative electrode of alkaline batteries is a mixture of zinc powder and strong alkaline electrolyte (high concentration KOH aqueous solution). In order to prevent zinc powder from settling in the electrolyte and ensure the discharge performance of alkaline batteries, it is usually necessary to add condensate to the negative electrode. The glue plays the role of thickening and preventing ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/06C08F216/12C08F220/28C08F222/14C08F212/08H01M4/62
CPCY02E60/10
Inventor 李泓淼户献雷麦景璋李琳呙临杰
Owner GUANGZHOU TINCI MATERIALS TECH
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