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A kind of preparation method of starch-based oil-absorbing material

An oil-absorbing, starch-based technology, applied in the field of starch development, can solve the problems of limited application of polyhydroxy chemical properties, and achieve the effect of fast absorption

Active Publication Date: 2019-12-03
镇江恒顺米业有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its polyhydric chemical properties limit its application in the organic field

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) Prepare 15% (w / v) ordinary cornstarch milk with phosphate buffer solution of pH=5, stir at 100rpm at 95°C for 1h for gelatinization, cool to about 40°C, place In the frequency sweep ultrasonic operating system (single frequency sweep mode: (22±2), (28±2), (33±2), (40±2), (68±2)kHz), set the temperature to 40°C , ultrasonic power per unit volume is 60W / L, pulse ultrasonic working time is 10s, intermittent time is 3s, ultrasonic sweep period is 500ms, α-amylase with 400u / g starch is added after 15 minutes of treatment, and the enzyme is killed at high temperature after sweep ultrasonic treatment for 60 minutes spare;

[0022] (2) Prepare 80% (v / v) methanol-water solution, add 0.01% (w / v) benzoyl peroxide, adjust the pH of the system to 5 with acetic acid after dissolving, add cetyl trimethoxy Silane (0.5%, v / v) was stirred and hydrolyzed for 5h under the condition of 300rpm;

[0023] (3) The prehydrolyzed silane was added dropwise at a flow rate of 10 mL / min to the ...

Embodiment 2

[0026] (1) Prepare 35% (w / v) ordinary cornstarch milk with phosphate buffer solution of pH = 7, stir at 95°C for 2 hours at a speed of 200rpm for gelatinization, cool to about 40°C, place in frequency sweep In the ultrasonic operating system (single-frequency sweep mode: (22±2), (28±2), (33±2), (40±2), (68±2)kHz), the set temperature is 40°C, and the unit The volumetric ultrasonic power is 180W / L, the working time of pulse ultrasonic is 10s, the intermittent time is 3s, the ultrasonic frequency sweep period is 500ms, and 400u / g starch α-amylase is added after 30 minutes of treatment, and the frequency sweep ultrasonic treatment is continued for 30 minutes, and then the enzyme is killed at high temperature for later use;

[0027] (2) Prepare 80% (v / v) methanol-water solution, add 0.04% (w / v) benzoyl peroxide, adjust the pH of the system to 4 with acetic acid after dissolving, add cetyl trimethoxy Silane (0.5%, v / v) was stirred and hydrolyzed for 3h under the condition of 300rpm...

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Abstract

The invention discloses a preparation method of a starch-based oil absorption material, and belongs to the technical field of starch development. After full gelatinization of starch, restrictive degradation is carried out on starch molecules by alpha-amylase with the assist of scanning frequency ultrasound, so that high-temperature enzyme deactivation is carried out. Under the condition of stirring, a mixed solution of hexadecyltrimethoxysilane prehydrolyzed by a methanol-water solution is added dropwise, and three-dimensional cross-linking is carried out on the gelatinized starch molecules with the silane through hydrogen bonding force for forming a network structure; and at the same time, the cross-linking of the hydrolyzed silane also promotes the formation of the three-dimensional network structure of the starch molecules, so that the sol-gel process of the starch is finished. An obtained gel is poured into a mould for moulding, quick freezing is carried out in liquid nitrogen, andthen dehydration condensation of the starch molecules with the hydrolyzed silane is promoted by the freeze drying for forming covalent bonds, so that the starch-based porous oil absorption material is prepared.

Description

technical field [0001] The invention discloses a preparation method of starch-based oil-absorbing material, which relates to the theory and technology of ultrasonic-assisted amylase limited degradation of starch molecules, silane pre-hydrolysis and silane-adsorbed starch molecule cross-linking to form a three-dimensional network structure, and belongs to the field of starch development technology. Background technique [0002] At present, oil pollution and organic solvent pollution in the water environment have become one of the major problems affecting human health. How to effectively remove such pollution sources has become an urgent problem to be solved. Traditional adsorption materials such as activated carbon and silica gel can solve some of the problems, but they have the problem of poor oil absorption ratio and oily substances are easy to leak out after oil absorption. In response to this disadvantage, some cross-linked copolymers, organic or inorganic nano-films, suc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J9/28C08J3/24C08B30/18C08B30/12B01J20/28B01J20/24B01J20/30C08L3/02
CPCB01J20/24B01J20/28054C08B30/12C08B30/18C08J3/24C08J9/28C08J2303/02
Inventor 魏本喜徐保国任晓锋王行肖露露吴梦马胜梅
Owner 镇江恒顺米业有限责任公司