Hydrophobic modification method of mulberry twig AQ-sodium hydroxide method chemical pulp papermaking paper

A technology of modification and paper, applied in the field of mulberry AQ-caustic soda chemical pulp making paper

Inactive Publication Date: 2016-04-20
张琳
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008]The current paper pulp internal sizing agents mainly include rosin glue, reinforced rosin glue, dispersed rosin glue, petroleum resin glue, paraffin glue, etc. Among them, rosin sizing agent And petroleum resin sizing agents are mainly used in acidic papermaking, and the effect on filler modification is poor, so it is difficult to meet the requirements of industrial production

Method used

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  • Hydrophobic modification method of mulberry twig AQ-sodium hydroxide method chemical pulp papermaking paper
  • Hydrophobic modification method of mulberry twig AQ-sodium hydroxide method chemical pulp papermaking paper
  • Hydrophobic modification method of mulberry twig AQ-sodium hydroxide method chemical pulp papermaking paper

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Preparation of materials: cooking is carried out in a laboratory oil bath cooking pot, which is provided with 4 small cooking pots. The AQ-caustic soda method is used for cooking, and the process conditions are: the amount of alkali used is 13% (based on Na 2 O), the dosage of anthraquinone is 0.05%, the liquid ratio is 1:5, the maximum temperature is 158°C, the heating time is 100min (from 60°C), and the holding time is 100min.

[0031] After cooking, the extruded part of the black liquor is used to measure its residual alkali. After the slurry is poured into the slurry bag and rinsed with tap water, it is screened by a laboratory flat screen machine. The screened slurry is shaken off and rubbed. Disperse, mix, and balance moisture.

[0032] Beating: refer to QB / T-1463-1992, beat in PFI mill, weigh a pulp sample equivalent to 30g dry pulp, fully wet with water, concentration 10%, speed 1400r / min.

[0033] Deflaking: refer to QB / T1462-1992, use KRK deflaking machine t...

Embodiment 2

[0037] A paper made from isobutyltriethoxysilane modified wollastonite, prepared according to the following steps:

[0038](1) First make aluminum sulfate into an aqueous solution with a mass concentration of 5%, impregnate the filter paper for 1 min, and place the filter paper at 100 o C under drying number;

[0039] (2) Put 8% isobutyltriethoxysilane in ethanol, add wollastonite to isobutyltriethoxysilane at a ratio of 1:1 and disperse in isobutyltriethoxysilane In the ethoxysilane-ethanol solution, obtain the isobutyltriethoxysilane-ethanol solution containing wollastonite, the filter paper impregnated with aluminum sulfate described in step (1), in the isobutyltriethoxysilane The base silane-wollastonite ethanol solution is pulled and dipped several times; after that, it is air-dried for 24 hours.

Embodiment 3

[0041] A paper made from isobutyltriethoxysilane modified wollastonite, prepared according to the following steps:

[0042] (1) First make aluminum sulfate into an aqueous solution with a mass concentration of 20%, impregnate the filter paper for 3 minutes, and place the filter paper at 105 o Drying number at C; (2) Put 12% isobutyltriethoxysilane in ethanol, and add wollastonite according to the ratio of wollastonite:isobutyltriethoxysilane=1:4 Dispersed in isobutyltriethoxysilane-ethanol solution, ultrasonically oscillated for 8 minutes to obtain isobutyltriethoxysilane-ethanol solution containing wollastonite, and the prepared isobutyltriethoxysilane Silane-ethanol solution is coated on the surface of the filter paper, and the coating amount will be controlled to be 8g / m 2 ; Afterwards, the impregnated filter paper was dried at 105° C. for 15 minutes in a constant-temperature blast drying oven to obtain a final product.

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Abstract

The present invention relates to a paper made through isobutyl triethoxy silane-modified wollastonite. The preparation method comprises: (1) preparing an (1) preparing an aluminum sulfate aqueous solution with a concentration of 5-20%, dipping filtration paper in the solution for 1-3 min, drying the filtration paper at a temperature of 100-105 DEG C, and numbering; and (2) adding isobutyl triethoxy silane with a concentration of 8-12% to ethanol, adding wollastonite according to a ratio of the wollastonite to the isobutyl triethoxy silane of 1:1-1:4, dispersing into the isobutyl triethoxy silane-ethanol solution to obtain the isobutyl triethoxy silane-ethanol solution containing the wollastonite, carrying out pulling dipping on the filtration paper obtained in the step (1) in the isobutyl triethoxy silane-wollastonite ethanol solution a plurality of times, and carrying out air drying for 24-48 h so as to obtain the product.

Description

technical field [0001] The invention relates to a mulberry branch AQ-caustic soda chemical pulp papermaking method, in particular to a hydrophobic modification method for the AQ-caustic soda chemical pulp papermaking method. Background technique [0002] Isobutyltriethoxysilane is a low-viscosity transparent liquid based on selected undiluted high-purity isobutyltriethoxysilane. The small molecular size of this silane ensures deep penetration (3-8mm) of impregnated concrete and slate surfaces into the pore structure. The impregnated isobutyltriethoxysilane reacts with moisture or interstitial moisture to form a permanently bonded hydrophobic interior on the pore walls of the substrate. The treated base layer is therefore highly hydrophobic, preventing the intrusion of water and water-based corrosive agents such as chlorides, while maintaining its original appearance. With the treated base, the water absorption is substantially reduced, and it also contributes to the therma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H17/68D21H17/69
Inventor 张琳
Owner 张琳
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