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Flexible modifier for gypsum fibers and preparation method of flexible modifier

A flexible modifier, gypsum fiber technology, applied in fiber treatment, textiles and papermaking, etc., can solve the problems of less research on the surface flexibility modification of gypsum fiber, to increase active groups, improve application performance, improve Dispersion effect

Inactive Publication Date: 2016-04-20
CHENDU NEW KELI CHEM SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] At present, the modification of gypsum fiber mainly focuses on solving the problem of papermaking retention rate, and simply covers the surface to solve the problem of its solubility. There are few studies on the surface flexibility modification of gypsum fiber. The flexible modification of gypsum fiber can enhance the bonding force between gypsum fiber and plant fiber, increase the amount of gypsum fiber replacing plant fiber, and provide a technical guarantee for the use of gypsum fiber in papermaking

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] (1) Put 50 parts by weight of wheat pregelatinized starch into a stirring reactor, and stir while adding water until the pregelatinized starch is completely dissolved to form a starch solution;

[0037] (2) Add 20 parts by weight of polyvinyl alcohol to an appropriate amount of water, stir and dissolve at 60-80°C, and make a polyvinyl alcohol solution with a mass fraction of 10%;

[0038](3) Add the polyvinyl alcohol solution obtained in step (2) to the starch solution in step (1), pass nitrogen gas for 15 minutes, remove the oxygen in the reaction kettle, and irradiate with ultraviolet rays for 5 minutes, and the radiation dose is 30kGy , to obtain polyvinyl alcohol graft modified starch gel;

[0039] (4) Add 5 parts by weight of expanded graphite to the above gel solution, stir for 5 minutes under high-speed stirring at 800 rpm, then add 10 parts by weight of hexadecyldimethylpropenyl ammonium chloride and continue stirring for 10 minutes. Stirring speed 500rpm, obta...

Embodiment 2

[0042] (1) Put 50 parts by weight of corn pregelatinized starch into a stirring reactor, and stir while adding water until the pregelatinized starch is completely dissolved to form a starch solution;

[0043] (2) Add 20 parts by weight of polyvinyl alcohol to an appropriate amount of water, stir and dissolve at 60-80°C, and make a polyvinyl alcohol solution with a mass fraction of 10%;

[0044] (3) Add the polyvinyl alcohol solution obtained in step (2) to the starch solution in step (1), blow in nitrogen for 15 minutes, remove the oxygen in the reaction kettle, and irradiate with ultraviolet rays for 10 minutes, and the radiation dose is 20kGy Obtain polyvinyl alcohol graft modified starch gel;

[0045] (4) Add 10 parts by weight of expanded graphite to the above gel solution, stir for 5 minutes under high-speed stirring at 1000 rpm, then add 15 parts by weight of octadecyltrimethylammonium chloride and continue to stir for 20 minutes. 500rpm, obtain polymer gel;

[0046] (...

Embodiment 3

[0048] (1) Put 60 parts by weight of cassava pregelatinized starch into a stirring reactor, and stir while adding water until the pregelatinized starch is completely dissolved to form a starch solution;

[0049] (2) Add 10 parts by weight of polyvinyl alcohol to an appropriate amount of water, stir and dissolve at 60-80°C, and make a polyvinyl alcohol solution with a mass fraction of 20%;

[0050] (3) Add the polyvinyl alcohol solution obtained in step (2) to the starch solution in step (1), blow in nitrogen for 10 minutes, remove the oxygen in the reactor, and irradiate with ultraviolet rays for 6 minutes, with a radiation dose of 30 kGy Obtain polyvinyl alcohol graft modified starch gel;

[0051] (4) Add 10 parts by weight of expanded graphite to the above gel solution, stir for 5 minutes under high-speed stirring at 800 rpm, then add 10 parts by weight of 2,3-dihydroxypropyl diester ammonium chloride and continue to stir for 20 minutes , stirring speed 300rpm, obtain polym...

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Abstract

The invention belongs to the field of inorganic mineral fibers and particularly relates to a flexible modifier for gypsum fibers and a preparation method of the flexible modifier. The flexible modifier for the gypsum fibers is polymer gel which adopts a network structure and is formed through cationic modification of starch obtained after polyvinyl alcohol graft modification and expanded graphite, and comprises raw materials in parts by weight as follows: 50-60 parts of pre-gelatinized starch, 10-20 parts of polyvinyl alcohol, 5-10 parts of expanded graphite, 5-15 parts of a cationic modifier, 5-10 parts of water-soluble vegetable gum and 2-3 parts of a dispersant. The flexible modifier for the gypsum fibers can improve surface activity of the gypsum fibers, improve softness and dispersity of the gypsum fibers and increase binding force between the gypsum fibers and plant fibers, and gypsum fibers treated with the method can obviously increase softness of paper when used for papermaking.

Description

technical field [0001] The invention belongs to the field of inorganic mineral fibers, in particular to a flexible modifier for gypsum fibers and a preparation method thereof. Background technique [0002] The paper industry plays an important role in the global economy and civilization, and its output value accounts for 2.5% of the world's total industrial output value and 2% of the world's total trade. Wood is the main raw material of the papermaking industry, accounting for more than 93% of the papermaking raw materials. With the rapid development of the papermaking industry, large-scale deforestation has been caused, the forest area of ​​the world has decreased sharply, desertification has intensified, and it has also brought serious pollution to the environment. , affecting human health. At present, the total amount of paper production in our country is constant, and there is a serious shortage of paper raw materials, which forces us to actively look for cheap pulp fib...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M15/19D06M15/03D06M11/74C08J3/075C08G81/02C08K3/04
CPCD06M15/19C08G81/02C08J3/075C08J2387/00C08K3/04D06M11/74D06M15/03
Inventor 陈庆孙丽枝
Owner CHENDU NEW KELI CHEM SCI CO LTD