Method for coating and modifying surface of inorganic paper making fiber calcium sulfate whisker and application

Active Publication Date: 2013-05-01
SHANGHAI UNIV
View PDF3 Cites 33 Cited by
  • 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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for coating and modifying surface of inorganic paper making fiber calcium sulfate whisker and application
  • Method for coating and modifying surface of inorganic paper making fiber calcium sulfate whisker and application
  • Method for coating and modifying surface of inorganic paper making fiber calcium sulfate whisker and application

Examples

Experimental program
Comparison scheme
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...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

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 "silicate nano fibers" (SNF), which is a silicon-based high-aspect-ratio filler developed by GR international, can not only optimize paper, but also improve the porosity, smoothness, bulk density, and optica...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(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
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap