Coumarin borax surface cross-linking modified precipitated calcium carbonate and its preparation method, application and a kind of paper

A technology of precipitated calcium carbonate and cross-linking modification, which is applied in the direction of fibrous fillers, dyeing polymer organic compound treatment, and addition of inorganic compounds. The effect of improving the retention rate and improving the tear index

Active Publication Date: 2018-12-18
WUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In most studies, filler modification mainly relies on physical or hydrogen bonding between the modified material and calcium carbonate. Since this combination is not very strong, its application effect is reduced.

Method used

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  • Coumarin borax surface cross-linking modified precipitated calcium carbonate and its preparation method, application and a kind of paper
  • Coumarin borax surface cross-linking modified precipitated calcium carbonate and its preparation method, application and a kind of paper
  • Coumarin borax surface cross-linking modified precipitated calcium carbonate and its preparation method, application and a kind of paper

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] Step 1: Add 0.75% (relative to the amount of PCC) coumarin into the oblique three mouths containing 90g of water, raise the temperature to 80°C, stir and disperse at 400rpm, and then add 10g of PCC;

[0061] Step 2: Add 2.5% (relative to the amount of PCC) borax into the reactor, and stir for 20 minutes;

[0062] Step 3: collecting the reaction product by centrifugation and washing and drying it;

[0063] Step 4: Grind MPCC and PCC finely with a mortar, pass through a 200-mesh copper mesh, analyze and characterize them with a scanning electron microscope, Fourier transform infrared spectrometer, elemental analyzer, etc. respectively.

[0064] The Magna IR 560 Fourier Transform Infrared Spectrometer produced by Nicolet Company of the United States was used for measurement, and the scanning range was 400 to 4000 cm -1 , scanning speed 40 times / min. The KBr tablet method is used to prepare the sample. Take an appropriate amount of the powder to be tested and mix it with ...

Embodiment 2

[0076] Step 1: Add 0.75% (relative to the amount of PCC) coumarin into the oblique three mouths containing 90g of water, raise the temperature to 80°C, stir and disperse at 400rpm, and then add 10g of PCC;

[0077] Step 2: Add 2.5% (relative to the amount of PCC) borax into the reactor, and stir for 20 minutes;

[0078] Step 3: collecting the reaction product by centrifugation and washing and drying it;

[0079] Step 4: Thaw the bleached kraft pulp soaked in water for more than 4 hours with a standard deflaker, use a beater to beat to 37°SR, add MPCC and PCC respectively after appropriate dilution, and the filling amount is 20% (based on the dry pulp amount ); refer to the method of GB / T3703-1999, make paper in a paper former; squeeze it for 1 min at a pressure of 0.4 MPa in a hydraulic press, then dry it in a drier at 97°C for 5 min, and the quantitative value of the sheet is 70 g / m 2 ;

[0080] Step 5: After drying the two hand-sheets obtained in Step 4, take a small piece...

Embodiment 3

[0083] Step 1: Add coumarin to the oblique three mouths containing 90g of water, raise the temperature to 80°C, stir and disperse at 400rpm, then add 10g of PCC; the amount of coumarin is as follows Figure 8-Figure 11 As shown, its consumption is respectively: 0.25%, 0.5%, 0.75%, 1%, 1.25%, 1.5%, 2% (relative to PCC consumption);

[0084] Step 2: Add 10% (relative to the amount of PCC) borax into the reactor, and stir for 10 minutes;

[0085] Step 3: collecting the reaction product by centrifugation and washing and drying it;

[0086] Step 4: Decompose the bleached kraft pulp soaked in water for more than 4 hours with a standard decomposer, use a beater to beat to 37°SR, add MPCC after appropriate dilution, and the filling amount is 20% (based on the dry pulp volume); refer to According to the method of GB / T3703-1999, the paper is made in a sheet forming machine; after pressing for 1 min at a pressure of 0.4 MPa in a hydraulic press, it is dried in a dryer at 97°C for 5 min,...

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Abstract

The invention provides modified precipitated calcium carbonate for crosslinking fenugreek gum on the surface through borax. Fenugreek gum is crosslinked on the surface of modified precipitated calcium carbonate through borax. The invention aims to provide modified precipitated calcium carbonate which can obviously increase the tensile index, the burst index, the tearing index and the filling one-way retention rate of paper when being applied to filling of the paper. Moreover, the invention further provides a preparation method and application of modified precipitated calcium carbonate; and furthermore, the invention further provides a piece of paper containing modified precipitated calcium carbonate.

Description

technical field [0001] The invention relates to the field of modification of paper-making fillers, in particular to surface cross-linking modified precipitated calcium carbonate with coumarin borax, its preparation method, application and a kind of paper. Background technique [0002] At present, the most commonly used fillers in the paper industry are calcium carbonate (ground calcium carbonate, precipitated calcium carbonate), kaolin and talcum powder. These three types of fillers account for 80% to 90% of the total filler usage. Among them, the paper industry in North America is dominated by kaolin. Calcium carbonate is the main product, while talcum powder is the main product in Asia. In addition, it also includes titanium dioxide, zinc sulfide, calcium sulfate, diatomaceous earth, barium sulfate, aluminosilicate, calcium silicate and some organic fillers. Since the 1970s, as the production of high-grade paper has changed from acidic to neutral or alkaline, calcium carb...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H17/69C09C1/02C09C3/10
CPCC09C1/021C09C3/10D21H17/69
Inventor 谢玮刘振华
Owner WUZHOU UNIV
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