Zero-dimensional and one-dimensional calcium carbonate micro-nano composite product taking cement and 'three wastes' as raw materials, composite material and synthesis process

A composite, micro-nano technology, which is applied in the field of raw material storage of micro-nano new materials, can solve the problems such as the workability and strength improvement of concrete mortar, and achieve the advantages of cheap raw materials, wide application range and simple production process. Effect

Active Publication Date: 2021-10-19
XIAMEN UNIV +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For more than 200 years, people have been using the hydration and condensation reaction of cement to produce cross-linked inorganic network polymers to develop building materials, but the workability and strength of concrete mortar have not yet been solved.

Method used

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  • Zero-dimensional and one-dimensional calcium carbonate micro-nano composite product taking cement and 'three wastes' as raw materials, composite material and synthesis process
  • Zero-dimensional and one-dimensional calcium carbonate micro-nano composite product taking cement and 'three wastes' as raw materials, composite material and synthesis process
  • Zero-dimensional and one-dimensional calcium carbonate micro-nano composite product taking cement and 'three wastes' as raw materials, composite material and synthesis process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0102] Example 1: Using Portland cement and carbon dioxide as raw materials, carbonization at different temperatures prepares micro-nano composite products

[0103] Add 100g of PC32.5R portland cement to 200g of water, and the system is at room temperature (25°C), 50°C, 60°C, 70°C, and 80°C, and mechanically stirred evenly, and carbon dioxide gas is introduced at a flow rate of 0.5L / min , respectively reacted for 4 hours, filtered with suction, washed with ethanol, and dried at 180°C for 1 hour to obtain the product.

[0104] The whole hole analysis result of raw material and material in table 1 embodiment 1

[0105]

[0106] figure 1 , figure 2 , table 1 is the follow-up figure and the whole hole analysis result of XRD and SEM of preparing aragonite type calcium carbonate composite product under different temperatures in embodiment 1, the result shows that when solid-liquid ratio is 1 / 2, at different temperatures all The formation of aragonite structure shows that hig...

Embodiment 2

[0107] Example 2: Using Portland cement and carbon dioxide as raw materials, micro-nano composite products synthesized at different reaction times

[0108] Add 100g of PC32.5R Portland cement to 200g of water, raise the temperature of the system to 80°C, stir it evenly, feed carbon dioxide gas at a flow rate of 0.5L / min, and react for 0.5h, 1h, 2h, 4h, 6h, 8h respectively After that, it was suction filtered, washed with water, and dried at 180°C for 1 hour to obtain the product.

[0109] The whole hole analysis result of raw material and different time complex products in the embodiment of table 2

[0110]

[0111] image 3 , Pic 4-1 , Figure 4-2 , Table 2 is the XRD and SEM tracking situation and the whole hole analysis result of the aragonite calcium carbonate composite product prepared in different reaction times of embodiment 2. According to XRD and SEM analysis, it can be seen that in the first 0.5h, the gas is adsorbed on the surface of the cement and reacts to ...

Embodiment 3

[0112] Example 3: Using Portland cement and carbon dioxide as raw materials to prepare micro-nano composite products with different solid-to-liquid ratios

[0113] Add 100g of PC32.5R Portland cement to 100g, 200g, 300g, 400g, 500g of water respectively, raise the temperature of the system to 70°C, stir it evenly, and introduce carbon dioxide gas at a flow rate of 0.5L / min. Filter, wash with water, and dry at 180° C. for 1 hour to obtain 119 g, 129 g, 128 g, 128 g, and 130 g of products.

[0114] Figure 5 , Image 6 The XRD figure and the SEM figure of the aragonite type calcium carbonate composite product prepared for different solid-to-liquid ratios of embodiment 3. The results showed that no aragonite structure was formed when the solid-liquid ratio was 1:1 or 1:5 at 70°C, which indicated that the formation of aragonite structure required a moderate solid-liquid ratio in the system. Combined with the observation of the reaction process, it was found that the formation of...

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Abstract

The invention provides a novel process for producing an aragonite type calcium carbonate whisker / nano white carbon black compound or a calcite type nano calcium carbonate / nano white carbon black compound on a large scale at low cost. The invention develops a new way for producing a micro-nano wire or nano powder compound product with one-dimensional or zero-dimensional structural characteristics by taking a large amount of cheap Portland cement or cement clinker and flue gas as raw materials, mixing and suspending the raw materials in a water-containing system, introducing the flue gas or carbon dioxide for hydration, double decomposition for neutralization and precipitation, and dehydration and condensation, and an inorganic micro-nano product library is enriched. Application results show that the calcium carbonate-based micro-nano composite product can greatly improve the tensile strength and impact toughness of materials such as plastic and rubber, enhance the adhesive strength of an adhesive, has remarkable cost performance advantages in quality improvement and cost reduction, and has a huge application potential. The invention develops a new way for producing high-performance calcium carbonate-based micro-nano composite products and novel composite materials on a large scale at low cost by taking cheap and large-amount cement as a basic raw material and simultaneously utilizing and reducing emission of carbon dioxide.

Description

technical field [0001] The invention creates a low-cost raw material library of new micro-nano materials, and creates a new way to produce new micro-nano composite products and composite materials with high cost-effectiveness on a large scale and at low cost, using cement and flue gas as basic raw materials. field of new materials. Background technique [0002] Micro-nano materials refer to materials whose size is between micron and nanometer, and are collectively referred to as micro-materials and nano-materials. It is generally recognized internationally that the size of micron materials is from 1 μm to 100 μm; the size of submicron materials is from 100 nm to 1 μm; nanomaterials refer to materials with a size smaller than 100 nm in any dimension of the three-dimensional space. In recent years, micro-nano materials have shown great application potential in improving the performance of composite materials, and various high-performance plastics, rubber and other composite m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F11/18C01B33/18
CPCC01F11/181C01B33/18C01P2002/72C01P2004/03C01P2006/12C01P2006/14C01P2006/16Y02W30/91
Inventor 尹应武谷传涛赵升云王玉林高玉兴赵瑨云黎恒杆蔡成伟师雪琴尹政清李德中杨少梅叶李艺
Owner XIAMEN UNIV
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