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Guar gum boric acid surface cross-linking modified precipitated calcium carbonate and its preparation method, application and a kind of paper

A technology for precipitating calcium carbonate and guar gum boric acid, which is applied in the direction of textiles and papermaking, papermaking, fibrous fillers, etc., can solve the problems of reducing the application effect and not being very firm, and achieves improved retention rate, smooth paper surface, evenly distributed effect

Active Publication Date: 2019-01-22
WUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The modification of PCC paper filler mainly depends on the 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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  • Guar gum boric acid surface cross-linking modified precipitated calcium carbonate and its preparation method, application and a kind of paper
  • Guar gum boric acid surface cross-linking modified precipitated calcium carbonate and its preparation method, application and a kind of paper
  • Guar gum boric acid 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

[0058] Step 1: Add guar gum equivalent to 0.5% of the weight of PCC to the three-slope mouth containing 90g of water, heat up to 80°C, stir and disperse at 400rpm, and then add 10g of PCC;

[0059] Step 2: Add boric acid equivalent to 7% by weight of PCC into the reactor, and stir for 10 minutes;

[0060] Step 3: collecting the reaction product by centrifugation and washing and drying it;

[0061] 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.

[0062] 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 KBr crystals in...

Embodiment 2

[0074] Step 1: Add guar gum equivalent to 0.5% of the weight of PCC to the three oblique mouths containing 90g of water, heat up to 80°C, stir and disperse at 400rpm, and then add 10g of PCC;

[0075] Step 2: Add boric acid equivalent to 7% by weight of PCC into the reactor, and stir for 10 minutes;

[0076] Step 3: collecting the reaction product by centrifugation and washing and drying it;

[0077] 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 GB / T3703-1999 method, papermaking in a sheet former; after pressing for 1 min at a pressure of 0.4 MPa in a hydraulic press, dry in a dryer at 97°C for 5 min, and the quantitative value of the hand-sheet is 70 g / m 2 ;

[0078] Step 5: After drying the two hand-sheets obtained in Step 4, take a small piece for sample p...

Embodiment 3

[0081] Step 1: Add guar gum to the inclined three mouths containing 90g of water, heat up to 80°C, stir and disperse at 400rpm, then add 10g of PCC; the amount of guar gum is as follows Figure 8-Figure 11 As shown, its dosage is respectively 0.25%, 0.5%, 0.75%, 1%, 1.5%, 2%, 2.5%, 3% of PCC weight;

[0082] Step 2: Add boric acid equivalent to 10% by weight of PCC into the reactor, and stir for 10 minutes;

[0083] Step 3: collecting the reaction product by centrifugation and washing and drying it;

[0084] 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, and the quantitative value ...

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Abstract

The invention provides a guar gum-boric acid surface-crosslinking modified precipitated calcium carbonate. Guar gum is crosslinked on the surface of the modified precipitated calcium carbonate through boric acid. The invention aims to provide a modified precipitated calcium carbonate which can obviously enhance the tensile index, burst index and tear index of paper and the single-pass retention rate of the filler when being used in the filler of the paper. The invention also provides a preparation method and application of the modified precipitated calcium carbonate. Besides, the invention also provides a paper containing the modified precipitated calcium carbonate.

Description

technical field [0001] The invention relates to the field of paper-making filler modification, in particular to guar gum boric acid surface cross-linking modified precipitated calcium carbonate, 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 carbonat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H17/69D21H21/14C09C1/02C09C3/10
CPCC09C1/022C09C3/10D21H17/69D21H21/14
Inventor 谢玮刘振华
Owner WUZHOU UNIV
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