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A kind of high temperature resistant defoamer and preparation method thereof

A defoamer and high temperature resistant technology, applied in defoamer, synthetic cellulose/non-cellulose material pulp/paper, paper, etc. Process adverse effects, etc.

Active Publication Date: 2016-02-10
SUZHOU HENGKANG NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Foam is a dispersion system of gas in liquid. The gas becomes many bubbles and is separated by the continuous phase liquid. The gas is the dispersed phase and the liquid is the dispersion medium. The foam is a thermodynamically unstable system that will give a lot of production adverse effect on the process
[0003] In the papermaking process, heating is sometimes required, but the existing defoamers are unstable at high temperatures and will decompose to produce some small molecular organic matter, which will destroy part of the chain structure of the defoamer and cause the defoamer to fail. Play a good defoaming effect
At the same time, in the usual emulsification process, the temperature needs to be raised, so that the emulsifier can work well, but when the emulsifier and the defoamer exist at the same time, the defoaming ability of the defoamer will be greatly reduced. Elevated emulsifier acts as a foam booster

Method used

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  • A kind of high temperature resistant defoamer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Mix 40kg of polyether-modified trisiloxane, 30kg of polyacrylamide, 20kg of rosin glyceride and 5kg of sodium bisulfate at 110°C with a homogenizer;

[0028] (2) Add 15 kg of polyacrylonitrile carbon fiber, 8 kg of single-layer graphene, 5 kg of alkali-free glass fiber and 1 kg of iron oxide powder to the product in step (1), and ultrasonically vibrate at 90 ° C to adjust the pH value to 6.5 to obtain High temperature resistant defoamer.

[0029] The performance test results of the prepared high temperature resistant defoamer are shown in Table 1.

Embodiment 2

[0031] (1) Mix 50kg of polyether modified trisiloxane, 40kg of polyacrylamide, 25kg of rosin glyceride and 3kg of sodium bisulfate at 120°C with a homogenizer;

[0032] (2) Add 10 kg of polyacrylonitrile carbon fiber, 5 kg of single-layer graphene, 8 kg of alkali-free glass fiber and 2 kg of iron oxide powder to the product in step (1), and ultrasonically vibrate at 100 ° C to adjust the pH value to 6.5 to obtain High temperature resistant defoamer.

[0033] The performance test results of the prepared high temperature resistant defoamer are shown in Table 1.

Embodiment 3

[0035] (1) Mix 45kg of polyether modified trisiloxane, 35kg of polyacrylamide, 30kg of rosin glyceride and 3kg of sodium bisulfate at 120°C with a homogenizer;

[0036] (2) Add 12 kg of polyacrylonitrile carbon fiber, 6 kg of single-layer graphene, 7 kg of alkali-free glass fiber and 2 kg of iron oxide powder to the product in step (1), ultrasonically vibrate at 95 ° C, and adjust the pH value to 6.5 to obtain High temperature resistant defoamer.

[0037] The performance test results of the prepared high temperature resistant defoamer are shown in Table 1.

[0038] Table 1

[0039]

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Abstract

The invention discloses a high-temperature-resistant defoamer and a preparation method thereof, which belong to the technical field of papermaking. The high temperature resistant defoamer is made of the following components by weight: 40-50 parts of polyether modified trisiloxane, 30-40 parts of polyacrylamide, 20-30 parts of rosin glyceride, polyacrylonitrile 10-15 parts of carbon fiber, 5-8 parts of graphene, 5-8 parts of glass fiber, 3-5 parts of sodium bisulfate and 1-2 parts of iron oxide. The high-temperature-resistant defoamer prepared by the invention has good defoaming performance, and at the same time, the defoamer can be used at a relatively high temperature, and has the effect of increasing the folding resistance and hardness of paper.

Description

technical field [0001] The invention belongs to the technical field of papermaking, in particular to a high-temperature-resistant defoamer and a preparation method thereof. Background technique [0002] Foam is a dispersion system of gas in liquid. The gas becomes many bubbles and is separated by the continuous phase liquid. The gas is the dispersed phase and the liquid is the dispersion medium. The foam is a thermodynamically unstable system that will give a lot of production adverse effects on the process. [0003] In the papermaking process, heating is sometimes required, but the existing defoamers are unstable at high temperatures and will decompose to produce some small molecular organic matter, which will destroy part of the chain structure of the defoamer and cause the defoamer to fail. Play a good defoaming effect. At the same time, in the usual emulsification process, the temperature needs to be raised, so that the emulsifier can work well, but when the emulsifier...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H21/12D21H17/59D21H13/50
Inventor 邓强
Owner SUZHOU HENGKANG NEW MATERIALS