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Method for measuring surface activation degree of modified powder material

A technology of surface activation and powder materials, applied in the direction of weighing by removing certain components, can solve problems that affect the stability and accuracy of measurement results, agglomeration, and instability of modified powders, so as to improve reliability and stability, strong lipophilicity, and the effect of expanding the measurement range

Inactive Publication Date: 2013-12-18
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Second, the modified powder with a hydrophobic surface is extremely unstable in water. In order to reduce its surface free energy, the powder is prone to agglomeration. As the standing time prolongs, some agglomerated particles will sink to the bottom of the water, which will affect the accuracy of the measurement results. Stability and Accuracy

Method used

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  • Method for measuring surface activation degree of modified powder material
  • Method for measuring surface activation degree of modified powder material
  • Method for measuring surface activation degree of modified powder material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] 1) Dry the industrial papermaking sludge modified with stearic acid at 105°C for 4 hours, then cool it in a silica gel drier for 30 minutes to reach a dry state, and then weigh 2.00g of the modified industrial sludge Papermaking sludge (modified powder material), standby;

[0039] 2) Measure 40mL of distilled water and add it to a 250mL pear-shaped separatory funnel, add the weighed dry modified industrial papermaking sludge into the pear-shaped separatory funnel (the ratio of solid to liquid is 0.05g / mL), Cover the pear-shaped separatory funnel and shake it up and down for 90 times, so that the surface of the modified powder material that has not been modified by the modifier in the modified powder material is wetted by water, then lightly put it on the funnel stand, and let it stand for 30s ;

[0040] 3) Measure 40mL of liquid paraffin into the pear-shaped separating funnel (the volume ratio of liquid paraffin and water is 1:1), cover the pear-shaped separating funne...

Embodiment 2

[0044] 1) Dry the industrial papermaking sludge modified with titanate NDZ311 at 100°C for 4 hours, then cool it in a silica gel drier for 30 minutes to reach a dry state, and then weigh 2.00g of the modified sludge Industrial papermaking sludge (modified powder material), standby;

[0045] 2) Measure 40mL of distilled water and add it to a 250mL pear-shaped separatory funnel, add the weighed dry modified industrial papermaking sludge into the pear-shaped separatory funnel (the ratio of solid to liquid is 0.05g / mL), Cover the pear-shaped separatory funnel and shake it up and down for 60 times, so that the surface of the modified powder material that has not been modified by the modifier in the modified powder material is wetted by water, then lightly put it on the funnel stand, and let it stand for 30s .

[0046] 3) Measure 40mL of liquid paraffin into a pear-shaped separating funnel (the volume ratio of liquid paraffin to water is 1:1), cover the pear-shaped separating funne...

Embodiment 3

[0050] 1) Dry the industrial paper sludge modified with silane coupling agent KH550 at 110°C for 4 hours, then cool it in a silica gel desiccator for 30 minutes to reach a dry state, and then weigh 2.00g of dry modified sludge industrial papermaking sludge (modified powder material), for standby;

[0051] 2) Measure 50mL of distilled water and add it to a 250mL pear-shaped separatory funnel, add the weighed dry modified industrial papermaking sludge into the pear-shaped separatory funnel (the ratio of solid to liquid is 0.04g / mL), Cover the pear-shaped separating funnel and shake it up and down for 120 times, so that the surface of the modified powder material that has not been modified by the modifier in the modified powder material is wetted by water, then lightly put it on the funnel stand, and let it stand for 30s .

[0052] 3) Measure 25mL of liquid paraffin into a pear-shaped separating funnel (the volume ratio of liquid paraffin to water is 1:2), cover the pear-shaped ...

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Abstract

The invention provides a method for measuring the surface activation degree of a modified powder material. The method comprises the steps: adding water and an over dry modified powder material with a ratio of material to liquid of 0.02-0.05g / mL in a container, and standing after shaking; then adding liquid paraffin in the container according to the volume ratio of the liquid paraffin to the water of 1:(1-4), and standing until a water phase and an oil phase in the container demix after shaking; separating the water phase from the oil phase, and drying the modified powder material in the water phase to constant weight; and finally, calculating an activation index H of the modified powder material. According to the method, by using change of surface hydrophilicity and hydrophobicity before and after the powder material is modified, powder materials which are modified by a modifying agent and not modified by the modifying agent are dispersed in the water phase and the oil phase respectively for realizing separation, and thus the activation index is calculated. Compared with a conventional method for measuring the activation index, the method has the advantages that by using a water-oil two-phase measuring system, the applicable range is greatly widened, and the reliability and stability of a measurement result are improved.

Description

technical field [0001] The invention relates to a method for characterizing the modification effect of a powder, in particular to a method for measuring the surface activation degree of a modified powder material. Background technique [0002] The evaluation of the modification effect is an important part of the surface modification of powders. Seeking a simple and reliable characterization method and establishing the corresponding relationship between the modification process parameters and quality indicators are of great significance to the research on the surface modification of powder materials. Significance. At present, there are many methods for characterizing the surface modification effect of powder materials, such as measuring the surface contact angle, surface energy, coating rate, specific surface area, sedimentation rate, oil absorption, water absorption and activation index of powder. Among them, the determination of the activation index of the modified powder ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N5/04
Inventor 韩卿张茹
Owner SHAANXI UNIV OF SCI & TECH
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