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Method for Determination of Adsorption Capacity of Sodium Lignosulfonate by Carbon Materials

A technology of sodium lignosulfonate and its determination method, which is applied in the field of determination of the adsorption capacity of carbon materials to sodium lignosulfonate, can solve the problems of limiting the effect of carbon materials and clogging, and achieve the effect of convenient adsorption capacity and simple operation

Active Publication Date: 2016-08-24
ZHEJIANG TIANNENG BATTERY JIANGSU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although carbon materials as battery additives can improve many performances of batteries, their high porosity, specific surface area and other characteristics also lead to their strong adsorption performance, so the added lignosulfonate will be adsorbed by it, which will lead to carbon Part of the pores of the material are blocked, which limits the role of the carbon material. At the same time, part of the sodium lignosulfonate is adsorbed, which also leads to the inability of the sodium lignosulfonate to play its original performance in the battery. Reasonable selection of battery additive carbon materials and lignosulfonic acid Sodium needs to determine the adsorption capacity of carbon materials to sodium lignosulfonate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A kind of assay method of carbon material to sodium lignosulfonate adsorption capacity, comprises the following steps:

[0025] (1) Weigh the dry funnel on a balance, and record the weight of the funnel as 57.493g;

[0026] (2) Set the mass to 1g ­ Sodium lignosulfonate was dissolved in 1.34g / ml of sulfuric acid with a volume of 500ml, then it was placed on a magnetic stirrer and stirred for 30min, then left to stand at room temperature for 24h;

[0027] (3) Suction filter the solution in step 2, collect the filter residue and filtrate, obtain a volume of 500ml of the filtrate, measure the absorbance of the filtrate at a wavelength of 280nm with a spectrophotometer and record it as A1 1.705;

[0028] (4) Rinse the filter residue in the funnel in step 3 with pure water for 3 times, then dry it in a vacuum oven at 70°C for 12 hours, weigh the total mass of the funnel and filter residue to be 58.177 g, and then Sodium lignosulfonate mass M in sulfuric acid 3 =0.684g;

...

Embodiment 2

[0035] A kind of assay method of carbon material to sodium lignosulfonate adsorption capacity, comprises the following steps:

[0036] (1) Weigh the dry funnel on a balance, and record the weight of the funnel as 57.493g;

[0037] (2) Dissolve 1g of sodium lignosulfonate in 1.34g / ml of sulfuric acid with a volume of 500ml, then place it on a magnetic stirrer and stir for 30min, then let it stand at room temperature for 24h;

[0038] (3) Suction filter the solution in step 2, collect the filter residue and filtrate, obtain a volume of 500ml of the filtrate, measure the absorbance of the filtrate at a wavelength of 280nm with a spectrophotometer and record it as 1.130;

[0039] (4) Rinse the filter residue in the funnel in step 3 with pure water for 3 times, then dry it in a vacuum oven at 70°C for 12 hours, weigh the total mass of the funnel and the filter residue to be 58.283 g, and then undissolved The mass of sodium lignosulfonate in sulfuric acid is 0.791g;

[0040] (5) T...

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Abstract

The invention discloses a method for measuring the adsorption amount of sodium lignosulfonate by carbon materials. Firstly, sodium lignosulfonate is dissolved in sulfuric acid of required concentration until it is fully dissolved, and a circulating vacuum pump is used for suction filtration to collect the dissolved part of lignin. The filtrate of sodium sulfonate, utilize ultraviolet-visible spectrophotometer to measure this filtrate absorbance; Collect filter residue, process drying, determine the quality of undissolved lignin; The different charcoal material of equal amount is added in the above-mentioned filtrate of equal volume respectively, in the Stand still for 12 hours or more at temperature, filter, collect the filtrate, and measure the absorbance of the filtrate with a UV-Vis spectrophotometer; according to Langerbier's law , using the change of the absorbance value of the filtrate before and after adding carbon, to determine the change of the concentration of acid-soluble lignin, and thus to obtain the adsorption amount of sodium lignin sulfonate by different carbon materials. The invention is simple in operation, can quantitatively know the adsorption capacity of the carbon material to the sodium lignin sulfonate, facilitates understanding of the adsorption capacity of the carbon material, and provides a certain reference for the screening of the battery additive carbon material and the sodium lignin sulfonate.

Description

technical field [0001] The invention relates to the field of lead-acid storage batteries, in particular to a method for measuring the adsorption amount of sodium lignosulfonate by carbon materials. Background technique [0002] Lead-carbon batteries are widely used in electric vehicles and other fields because of their advantages such as high energy ratio, safety and reliability, low price, high power, and long cycle life. Carbon materials and lignin are indispensable in the negative plate of lead-carbon batteries. part. Sodium lignosulfonate, as an organic expansion agent, can prevent the shrinkage of the lead surface of the negative electrode and the passivation of the lead sulfate of the negative electrode in a low temperature environment, and can effectively improve the low temperature performance of the battery. Because carbon materials have good specific surface area, porosity, electrical conductivity, etc., adding them to the negative electrode can increase the speci...

Claims

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Application Information

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IPC IPC(8): G01N21/33
Inventor 周燕赵冬冬陈飞方明学
Owner ZHEJIANG TIANNENG BATTERY JIANGSU