A kind of preparation method of AKD paper sizing agent and product thereof

A paper sizing agent, PVP-DADMAN technology, applied in the field of alkyl ketene dimer (AKD) paper sizing agent and its preparation, can solve problems such as poor emulsification stability, achieve easy operation, reduce agglomeration, Effect of improving lipophilicity

Active Publication Date: 2020-05-01
辽宁兴东科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems of poor emulsification stability of the current alkyl ketene dimer (AKD) sizing agent, the present invention provides a preparation method of a stress-sensitive AKD paper sizing agent, without adding other surfactants, and the obtained sizing agent The glue has good storage stability

Method used

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  • A kind of preparation method of AKD paper sizing agent and product thereof
  • A kind of preparation method of AKD paper sizing agent and product thereof
  • A kind of preparation method of AKD paper sizing agent and product thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032](1) 50 parts by weight of HAuCl 4 and 1 part by weight of M w 55kg / mol of PVP-DADMAN were dissolved in water to obtain a concentration of 1 × 10 -2 MHAuCl 4 solution and concentration of 1 x 10 -7 M solution of PVP-DADMAN, mixed and boiled for 1 hour, then added 20 parts by weight of ascorbic acid, stirred and reacted in the dark at 98°C for 1 hour, centrifuged at 5000rpm for 5 minutes to obtain a supernatant; vacuum-dried the supernatant to obtain a modified nano Gold particles with an average particle size of 60nm.

[0033] (2) 1 weight part of M w 1 kg / mol of PEOS was dissolved in 3 parts by weight of molten AKD at 65°C as the oil phase; 2 parts by weight of the modified nano-gold prepared in step (1) was dissolved in water to make a mass percent concentration of 0.4% solution; drop dilute hydrochloric acid to adjust the pH to 1, as the water phase; add the water phase to the oil phase, the volume ratio of the oil phase and the water phase is 1:9, stir ultrasonic...

Embodiment 2

[0040] (1) 35 parts by weight of HAuCl 4 and 1 part by weight of M w 55kg / mol of PVP-DADMAN were dissolved in water to obtain a concentration of 1 × 10 -2 MHAuCl 4 solution and concentration of 1 x 10 -7 The solution of PVP-DADMAN of M, mixed and boiled for 1h, then added 70 parts by weight of ascorbic acid, stirred and reacted in the dark at 98°C for 1h, centrifuged at 5000rpm for 5min to obtain the supernatant, the TEM picture of the supernatant is as follows figure 1 Shown; Obtain modified nano-gold particles after the supernatant is vacuum-dried, and the average particle diameter is 40nm;

[0041] (2) 2 parts by weight of M w PEOS of 1kg / mol was dissolved in 12 parts by weight of molten AKD at 70°C as the oil phase; 2 parts by weight of the modified nano-gold prepared in step (1) was dissolved in water to make a mass percent concentration of 0.6% solution; drop dilute hydrochloric acid to adjust the pH to 2, as the water phase; add the water phase to the oil phase, th...

Embodiment 3

[0048] (1) 20 parts by weight of HAuCl 4 and 1 part by weight of M w 55kg / mol of PVP-DADMAN were dissolved in water to obtain a concentration of 1 × 10 -2 MHAuCl 4 solution and concentration of 1 x 10 -7 M solution of PVP-DADMAN, mixed and boiled for 1 hour, then added 90 parts by weight of ascorbic acid, stirred and reacted in the dark at 98°C for 1 hour, centrifuged at 20,000rpm for 25 minutes to obtain a supernatant; vacuum-dried the supernatant to obtain a modified nano Gold particles with an average particle size of 15nm.

[0049] (2) 5 parts by weight of M w 1kg / mol of PEOS was dissolved in 100 parts by weight of molten AKD at 80°C as the oil phase; 2 parts by weight of the modified nano-gold prepared in step (1) was dissolved in water to make a mass percent concentration of 1.3% solution; drop dilute hydrochloric acid to adjust the pH to 4, as the water phase; add the water phase to the oil phase, the volume ratio of the oil phase and the water phase is 1:2, stir u...

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Abstract

The invention provides a preparation method of an AKD paper sizing agent. The method comprises the following steps: (1), dissolving HAuCl4 and PVP-DADMAN into water, boiling the water, then adding a reducing agent, keeping the HAuCl4 and PVP-DADMAN in dark place, stirring to make the HAuCl4 and PVP-DADMAN react, performing centrifugation, and performing vacuum drying on supernate, so as to obtainmodified nanometer gold particles; (2), dissolving PEOS into molten AKD, and taking the PEOS as an oil phase; dispersing the modified nanometer gold prepared in the step (1) into water, adjusting pH to be acidic, and taking the modified nanometer gold as a water phase; performing ultrasonic mixing on the water phase and the oil phase while heating, and allowing the water phase and the oil phase tostand still, so as to obtain oil-in-water type AKD Pickering emulsion, namely the stress induced AKD paper sizing agent. The sizing agent effectively reduces coalescence of AKD oil drops, greatly improves the stability of emulsion, ensures that water phase and oil phase are not separated out after the emulsion is stabilized for a plurality of months, does not need to add any surfactants and othermodifiers, and is simple in structure and easy to operate.

Description

technical field [0001] The invention belongs to the application field of nanomaterials in papermaking, and in particular relates to a stress-sensing alkyl ketene dimer (AKD) paper sizing agent and a preparation method thereof. Background technique [0002] In the 20th century, the papermaking industry shifted from the acidic papermaking system to the medium-alkaline papermaking system, which was an innovative change in the papermaking process. It greatly improved the quality of paper and expanded the range of fillers, reduced pulp consumption and energy consumption, reduced environmental pollution, and extended the service life of equipment. service life. According to statistics, in the early 1980s in Europe, the cultural paper produced by medium and alkaline sizing accounted for 60%-65% of the total cultural paper, and it reached 95% in the 1990s. The proportion of alkaline sizing jumped from 15% to over 90%. Since 1989, China has started to use medium and alkaline sizing...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H21/16D21H19/14D21H19/32
CPCD21H19/14D21H19/32D21H21/16
Inventor 于得海程娜刘温霞胡晓秋李淑贤郝三伟李国栋宋兆萍王慧丽
Owner 辽宁兴东科技有限公司
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