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Hydrophobic starch with high jetting property and preparation method thereof

A hydrophobic starch and fluidity technology, which is applied in the field of starch modification, can solve the problems that modified starch is difficult to achieve high jet flow, and the comprehensive performance of hydrophobicity and jet flow is poor, so as to improve fluidity and hydrophobicity. Comprehensive performance, the effect of no three wastes discharge

Active Publication Date: 2018-01-12
枣庄市东方变性淀粉有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] Nevertheless, in the prior art, the overall performance of hydrophobicity and jet flow after starch modification is still poor, making it difficult for modified starch to achieve high jet flow and high hydrophobicity.

Method used

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  • Hydrophobic starch with high jetting property and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A kind of preparation method of highly spouting hydrophobic starch, comprises the following steps:

[0029] (1) Add starch into a mixer with stirring and heating functions, heat it to 75°C, and stir at a stirring speed of 1000r / min until no obvious water vapor evaporates, and add starch Mass 0.05% fumed silica, continue to stir for 20min;

[0030] (2) After the materials in step (1) are mixed evenly, and at a stirring speed of 1000r / min, add a hydrophobic coupling agent accounting for 0.5% of the starch mass, keep the temperature at 75°C, activate for 20min, and then Stirring speed is 100r / min, stirring and cooling, that is.

[0031] The starch used in this embodiment is corn starch, and the angle of repose of the dried corn starch measured according to GB 11986-1989 is 35°.

[0032] In this embodiment, the hydrophobic coupling agent is an aluminate coupling agent.

[0033] The modified corn starch obtained in this embodiment was tested for the angle of repose, and t...

Embodiment 2

[0043] A kind of preparation method of highly spouting hydrophobic starch, comprises the following steps:

[0044] (1) Add starch to a mixer with stirring and heating functions, heat to 90°C, and stir at a stirring speed of 2500r / min until no obvious water vapor evaporates, and add starch Mass 0.09% fumed silica, continue to stir for 60min;

[0045] (2) After the materials in step (1) are mixed evenly, and at a stirring speed of 2500r / min, add a hydrophobic coupling agent accounting for 1.9% of the starch mass, keep the temperature at 90°C, activate for 40min, and then Stirring speed is 500r / min, stirring and cooling, that is.

[0046] The starch that adopts is sweet potato starch;

[0047] The hydrophobic coupling agent used is a silane coupling agent;

[0048] With the sweet potato starch in embodiment 2 and the sweet potato starch after modification, with reference to the detection mode of embodiment 1, carry out the detection of angle of repose and activation index, swe...

Embodiment 3

[0050] Weigh 50kg of potato starch, add it to a mixer with stirring and heating functions, heat and stir, keep the speed at 1500r / min, adjust the temperature at 85±2°C, and dry until no obvious water vapor evaporates. After the starch is dried, add fumed silicon dioxide with a starch mass of 250 g and continue stirring for 20 min. Under the stirring condition of 1500r / min, add 550g of hydrophobic silane coupling agent KH-550 at one time, keep the temperature within the range of 85±2°C, activate it for 25min, then cool slowly under stirring at 300r / min at low speed.

[0051] With the potato starch in embodiment 3 and the modified potato starch, with reference to the detection mode of embodiment 1, carry out the detection of angle of repose and activation index, potato starch is unmodified, and its angle of repose is 36 °, and activation index is 0%, and after being treated according to the modification method of Example 3, the angle of repose is 19°, and the activation index is...

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Abstract

The invention relates to the technical field of starch modification and in particular relates to hydrophobic starch with a high jetting property and a preparation method thereof. According to the hydrophobic starch, fused silicon dioxide is used as a flowability modifier and the control on an adding amount of the fused silicon dioxide is combined; after fused silicon dioxide treatment is adopted,a hydrophobic coupling agent is used for treating; the control on a dosage of the hydrophobic coupling agent is combined and the limitation on conditions of a preparation technology is adopted, so that the hydrophobic property and the flowability of the starch are greatly improved and the energy consumption is reduced. Specifically, the repose angle of corn starch can be reduced to 20 degrees or lower; the activation index of the modified corn starch reaches 97 percent or more; the comprehensive performance including the flowability and the hydrophobic property of the corn starch is improved.

Description

technical field [0001] The invention relates to the technical field of starch modification, in particular to a highly jetting hydrophobic starch and a preparation method thereof. Background technique [0002] Starch is a high polymer of glucose with the general chemical formula (C 6 h 10 o 5 ) n , is a natural polymer compound with a wide range of sources. It is used more and more in the fields of daily chemical products, food, and medicine, and has broad applications in industrial fields such as papermaking, textiles, and petroleum. Starch molecules are hydrophilic polymer chains, which have poor hydrophobicity and are prone to agglomeration between particles, resulting in poor fluidity of the powder, and are easily gelatinized in hot water, which is greatly limited in practical industrial applications. Modification and improvement of jet flow can greatly change the overall performance of starch, and many modified starch products have been practically developed and appl...

Claims

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Application Information

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IPC IPC(8): C08L3/02C08K3/36C08K5/10C08K5/54C08K5/544C08K5/5435
Inventor 谭登峰龙小娥庞锦英蓝春波
Owner 枣庄市东方变性淀粉有限公司
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