Preparation method of calcium carbonate whisker with continuously controllable morphology

A calcium carbonate whisker and morphology technology, applied in the field of calcium carbonate whisker preparation, can solve the problems of low production cost and high cost hindering large-scale application, and achieve increased growth points, good chemical properties and mechanical properties, and effects strong effect

Active Publication Date: 2018-04-17
ZHEJIANG UNIV
View PDF4 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Inorganic whiskers have a relatively complete structure and few defects, and their strength and modulus are close to the theoretical values ​​of complete crystals, and their flame retardancy is better than that of organic whiskers, so they become ideal reinforcing and toughening materials for composite materials, such as ZnO and SiC. , Potassium titanate, mullite, aluminum borate, etc. have been industrialized, but high cost has hindered large-scale application, while calcium carbonate whiskers have a wide range of raw materials and low production costs, and can even be prepared from industrial waste residues. Most Important Inorganic Whisker Materials

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
  • Preparation method of calcium carbonate whisker with continuously controllable morphology
  • Preparation method of calcium carbonate whisker with continuously controllable morphology
  • Preparation method of calcium carbonate whisker with continuously controllable morphology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Step 1: Add calcium oxide to deionized water to obtain Ca(OH) with a concentration of 0.1mol / L 2 Suspension, heated to 70°C at the same time, digested for 2h;

[0023] Step 2: Weigh magnesium chloride as the crystal form control agent, make the ratio of magnesium to calcium 1:1, add water to dissolve, and add the magnesium chloride solution to the digested Ca(OH) 2 In the suspension, stir for 0.5h to make it uniform; Step 3: use a three-neck round bottom flask, and pass CO2 through the openings on both sides at a flux of 150ml / min 2 Gas to the bottom of the reaction device for carbonation reaction;

[0024] Step 4: After the carbonization reaction was carried out for 2 hours, the obtained precipitate was suction-filtered, washed, and dried to obtain a sample.

[0025] The number of branches of the prepared calcium carbonate whiskers is mainly 4, and its SEM image is shown in figure 1 .

Embodiment 2

[0027] Step 1: Add calcium oxide to deionized water to obtain Ca(OH) with a concentration of 0.2mol / L 2 Suspension, heated to 80°C at the same time, digested for 2 hours;

[0028] Step 2: Weigh magnesium chloride as the crystal form control agent, make the ratio of magnesium to calcium 2:1, add water to dissolve, and add the magnesium chloride solution to the digested Ca(OH) 2 In the suspension, stir for 0.5h to make it uniform; Step 3: use a three-necked round bottom flask, and pass CO2 through the openings on both sides at a flux of 100ml / min 2 Gas to the bottom of the reaction device for carbonation reaction;

[0029] Step 4: The carbonization reaction ends after 2.5 hours, and the obtained precipitate is suction filtered, washed, and dried to obtain a sample.

[0030] The number of branches of the prepared calcium carbonate whiskers is mainly about 7, and the SEM image is shown in figure 2 .

Embodiment 3

[0032] Step 1: Add calcium oxide to deionized water to obtain Ca(OH) with a concentration of 0.3mol / L 2 Suspension, heated to 100°C at the same time, digested for 2 hours;

[0033] Step 2: Weigh magnesium chloride as the crystal form control agent, make the ratio of magnesium to calcium 2.5:1, add water to dissolve, and add the magnesium chloride solution to the digested Ca(OH) 2 In the suspension, stir for 0.5h to make it uniform;

[0034] Step 3: Using a three-neck round bottom flask, inject CO from both sides at a flow rate of 60ml / min 2 Gas to the bottom of the reaction device for carbonation reaction;

[0035] Step 4: The carbonization reaction is completed after 3 hours, and the obtained precipitate is suction filtered, washed, and dried to obtain a sample.

[0036] The number of branches of the prepared calcium carbonate whiskers can be as high as 16, and the SEM images of the whiskers are shown in image 3 .

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 preparation method of a calcium carbonate whisker with continuously controllable morphology. The preparation method comprises the following steps of firstly, adding calcium oxide into deionized water, and digesting at certain temperature; then, adding a crystal form control agent, uniformly stirring, and enabling a double-pipe air ventilating device to lead carbon dioxidegas at certain flow rate to perform carbonation reaction; finally, sucking and filtering the obtained suspension liquid, washing, and drying, so as to obtain a sample. The preparation method has thecharacteristics that the prepared multi-arm whisker is the calcium carbonate whisker with novel morphology, and the number of whisker branches can be controlled through reaction conditions; the whisker is used as a filling material of the composite material, the chemical property and mechanical property are improved, and the like.

Description

technical field [0001] The invention relates to the technical field of preparation of inorganic materials, in particular to a method for preparing calcium carbonate whiskers with continuous and controllable morphology. Background technique [0002] Inorganic whiskers have a relatively complete structure and few defects, and their strength and modulus are close to the theoretical values ​​of complete crystals, and their flame retardancy is better than that of organic whiskers, so they become ideal reinforcing and toughening materials for composite materials, such as ZnO and SiC. , Potassium titanate, mullite, aluminum borate, etc. have been industrialized, but high cost has hindered large-scale application, while calcium carbonate whiskers have a wide range of raw materials and low production costs, and can even be prepared from industrial waste residues. The most important inorganic whisker material. [0003] At present, scholars at home and abroad have done a lot of resear...

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): C30B29/22C30B29/62C30B7/14
CPCC30B7/14C30B29/22C30B29/62
Inventor 王宗荣李庆蕾刘剑王珊田薇杜丕一
Owner ZHEJIANG 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