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Surface Coating Modification Method and Application of Inorganic Papermaking Fiber Calcium Sulfate Whiskers

A calcium sulfate whisker and surface coating technology, which is applied in the field of paper-making fillers, can solve the problems of reducing the retention rate and affecting the use effect, and achieve the effects of improving the retention rate, reducing wood waste, and high efficiency

Active Publication Date: 2016-01-27
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since calcium sulfate is slightly soluble in water, it will reduce the retention rate due to partial dissolution during the papermaking process and affect the use effect.

Method used

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  • Surface Coating Modification Method and Application of Inorganic Papermaking Fiber Calcium Sulfate Whiskers
  • Surface Coating Modification Method and Application of Inorganic Papermaking Fiber Calcium Sulfate Whiskers
  • Surface Coating Modification Method and Application of Inorganic Papermaking Fiber Calcium Sulfate Whiskers

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Experimental program
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Effect test

Embodiment 1

[0033] Embodiment one: see Figure 1 to Figure 6 , the surface coating modification method of the inorganic papermaking fiber calcium sulfate whisker that the present embodiment provides, it comprises the following steps:

[0034] (1) Disperse the whiskers in an aqueous solution with 5% trisodium citrate relative to the mass fraction of the calcium sulfate whiskers for 2 hours; after processing, filter and dry to obtain highly dispersed calcium sulfate whiskers; figure 2 It is a scanning electron microscope picture of the whiskers after dispersion treatment obtained after the preparation in this step. Table 1 is its energy spectrum analysis table:

[0035] The energy spectrum analysis table of the whiskers after the dispersion treatment in table 1

[0036] Element

Wt%

At%

CK

09.25

15.89

OK

44.40

57.28

NaK

01.15

01.03

PK

00.57

00.38

SK

18.99

12.22

CaK

25.65

13.21

...

Embodiment 2

[0047] Embodiment two: the present embodiment provides a kind of surface coating modification method and application of inorganic papermaking fiber calcium sulfate whisker, and it is basically the same as embodiment 1, and its difference is that it also includes the following steps:

[0048] (1) Use a mixed solution of sodium polyphosphate and sodium hexametaphosphate relative to the mass fraction of the calcium sulfate whiskers at 3% to disperse the whiskers in the aqueous solution for 2 hours; after the treatment, filter and dry Obtain highly dispersed calcium sulfate whiskers;

[0049] (2) Measure water, ethanol, ammonia water and ethyl orthosilicate with a volume ratio of 4:8:0.1:1 respectively, and add a small amount of ethanol into the ethyl orthosilicate for dilution; Ethanol and ammonia water are placed in a three-necked flask, and magnetically stirred, then a mixed solution of surfactant sodium dodecylbenzenesulfonate and sodium dodecyl sulfate is added, and the mixtu...

Embodiment 3

[0053] Embodiment three: the present embodiment provides a kind of surface coating modification method and application of inorganic papermaking fiber calcium sulfate whisker, and it is basically the same as embodiment 1, 2, and its difference is, it also comprises the following steps:

[0054] (1) With 3% sodium hexametaphosphate relative to the mass fraction of the calcium sulfate whiskers, the whiskers were dispersed in an aqueous solution for 2 hours; after processing, filter and dry to obtain highly dispersed calcium sulfate whiskers ;

[0055] (2) Measure water, ethanol, ammonia water and ethyl orthosilicate with a volume ratio of 4:8:0.1:1 respectively, and add a small amount of ethanol into the ethyl orthosilicate for dilution; Ammonia water was placed in a three-necked flask, and magnetically stirred, then the surfactant cetyltrimethylammonium bromide was added, and mixed evenly;

[0056] (3) The highly dispersed calcium sulfate whiskers prepared in step (1) are measu...

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Abstract

The invention discloses a method for coating and modifying surface of inorganic paper making fiber calcium sulfate whisker, which comprises the following steps: 1) mixing the calcium sulfate whisker with a dispersant relative to 1-10% of mass fraction of calcium sulfate whisker, dispersing the calcium sulfate whisker; filtering and drying after treating to obtain the calcium sulfate whisker with high dispersion; 2) measuring water, ethanol, ammoniacal liquor and organosilicon source with set volume ratio, placing the water, ethanol and ammoniacal liquor in a three-mouth flask, performing magnetic stirring, adding a proper amount of surfactant, uniformly mixing for standby; 3) adding the prepared calcium sulfate whisker with high dispersion in the three-mouth flask filled with a mixed solution, uniformly mixing, slowly adding the measured organosilicon source by batches; and 4) stirring and modifying the prepared mixed solution at the temperature of below than 25 DEG C, subsiding for 8-10 hours, filtering, and drying under the temperature of 95% to prepare the modified calcium sulfate whisker.

Description

technical field [0001] The invention relates to the technical field of papermaking fillers, in particular to a surface coating modification method and application of calcium sulfate whiskers of inorganic papermaking fibers. Background technique [0002] Micro-nano technology has become a hot field, and the development trend of micro-nano in the paper industry cannot be ignored. It brings potential advantages that other materials cannot possess. At present, the development and application of micro-nano fillers has attracted the attention of researchers in various fields. [0003] According to relevant literature reports, a newly developed micro-nano filler with high aspect ratio can replace traditional fillers and be added to pulp wet cloth. For example, silica nanofiber "silicatenanofibers" (SNF), a silicon-based high-aspect-ratio filler developed by GRinternational, can not only optimize paper, but also improve the porosity, smoothness, bulk density, and optical-mechanical...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H17/69C30B29/46C30B29/62
Inventor 施利毅张迎冯欣王钢领苗苗孟祥浩时雯
Owner SHANGHAI UNIV
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