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Long-chain saturated fatty glyceride nano-emulsion pore suppository and preparation method thereof

A fatty acid glyceride and nano-emulsion technology, applied in the field of concrete admixtures, can solve the problems of large lipophilic interaction, hidden health risks, easy agglomeration and delamination or gelation, etc., and achieves improved early strength, improved stability, and improved flow. sexual effect

Active Publication Date: 2020-08-28
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for the application of concrete admixtures in construction projects, the construction and stability of long-chain fatty acid ammonium salt emulsions still have great limitations. On the one hand, the pH range of long-chain fatty acid ammonium emulsions is 10-12, and the emulsion contains a large The free ammonia in the concrete is released in large quantities in the process of concrete construction and cement hydration, which brings health risks to construction workers and limits its use; on the other hand, due to the strong hydrophobicity and strong lipophilic interaction of saturated long-chain fatty acids, its The emulsion is unstable, easy to agglomerate, layer or gel

Method used

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  • Long-chain saturated fatty glyceride nano-emulsion pore suppository and preparation method thereof
  • Long-chain saturated fatty glyceride nano-emulsion pore suppository and preparation method thereof
  • Long-chain saturated fatty glyceride nano-emulsion pore suppository and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0028] A long-chain saturated fatty acid glyceride nanoemulsion pore suppository, the raw materials of which are: 8.86wt% of hardened oil, 0.11wt% of defoamer, 2.03wt% of ammonia, 0.18wt% of triethanolamine, and the balance is deionized Water; the ammonia concentration is 10%.

[0029] The preparation method of the long-chain saturated fatty acid glyceride nanoemulsion pore suppository provided in this example, the specific steps are as follows: put 50 g of hardened oil in a three-necked flask and heat it to dissolve at 85° C. The heating time is 20 minutes. After dissolving, add 13 g Ammonia and 500g of water, then rapidly hydrolyzed and emulsified at 85°C at 1100r / min for 1h; then, add 1g of triethanolamine at 75°C, stirring at a rapid rate of 1100r / min for 1.5h; then, vacuum at 70°C Pump ammonia gas to a pH range of 7 to 7.5; then, add 0.6g of defoamer at 70°C, and stir at a slow speed for 0.5 to 1 hour to eliminate foam; finally, stir at a slow speed of 450r / min for 4 hour...

Embodiment 2

[0031] A long-chain saturated fatty acid glyceride nanoemulsion pore suppository, the raw materials of which are: 7.8wt% of hardened oil, 0.16wt% of antifoaming agent, 4.5wt% of ammonia water, 0.26wt% of triethanolamine, and the balance is water; The ammonia concentration is 10%.

[0032]The preparation method of the long-chain saturated fatty acid glyceride nanoemulsion pore suppository provided in this example, the specific steps are as follows: put 45g of hardened oil in a three-necked flask and heat it to 85°C to dissolve it for 20 minutes. After dissolving, add 26g Ammonia water and 500g water, then rapidly hydrolyzed and emulsified at 85°C at 1200r / min for 1 hour; then, add 1.5g of triethanolamine at 85°C, rapidly 1100r / min stirred, replaced and emulsified for 1.5h; then, vacuum at 70°C Pump ammonia gas to a pH range of 7 to 7.5; then, add 0.9g of defoamer at 70°C, stir at a slow speed for 0.5 to 1 hour to eliminate foam; finally, stir at a slow speed of 450r / min for 4 h...

Embodiment 3

[0034] A long-chain saturated fatty acid glyceride nanoemulsion pore suppository, the raw materials of which are: 7.03wt% of hardened oil, 0.21wt% of defoamer, 4.57wt% of ammonia, 0.35wt% of triethanolamine, and the balance is water; The ammonia concentration is 10%.

[0035] The preparation method of the long-chain saturated fatty acid glyceride nanoemulsion pore suppository provided in this example, the specific steps are as follows: put 40 g of hardened oil in a three-necked flask and heat to dissolve at a temperature of 85 ° C. The heating time is 20 minutes. After dissolving, add 26 g Ammonia and 500g of water, then rapidly hydrolyzed and emulsified at 85°C at 1300r / min for 1h; then, add 2g of triethanolamine at 85°C and stir at a medium speed of 1300r / min for 1.5h; then, vacuum pump at 70°C Ammonia gas to a pH range of 7 to 7.5; then, add 1.2g of defoamer at 70°C, and stir slowly for 0.5 to 1 hour to eliminate foam; finally, stir at a slow speed of 450r / min for 4 hours a...

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Abstract

The invention provides a long-chain fatty glyceride nano-emulsion pore suppository which mainly comprises hardened oil, triethanolamine, a defoaming agent and water in percentage by mass as follows: 7%-9% of long-chain saturated fatty glyceride, 0.15%-0.4% of triethanolamine, 0.1%-0.25% of the defoaming agent and the balance of water. The pore suppository is mainly characterized in that the ammonia-free nano-emulsion is obtained by adopting a system of long-chain saturated fatty glyceride and a preparation method of replacing ammonia with triethanolamine and removing ammonia gas in vacuum, thepH value range is 7-7.5, the particle size range of the emulsion is 70-100 nm, the emulsion is stable at the normal temperature, the capillary water absorption coefficient and the chloride ion migration coefficient of the concrete can be significantly reduced, and the disadvantage that toxic ammonia gas can be released during the concrete construction process is avoided.

Description

technical field [0001] The invention belongs to the field of concrete admixtures, in particular to a long-chain saturated fatty acid glyceride nanoemulsion pore suppository and a preparation method thereof. Background technique [0002] Among the concrete pore suppositories, the long-chain fatty acid ammonium salt is the most widely used type of fatty acid concrete organic pore suppository waterproofing agent. Long-chain fatty acid ammonium salt organic emulsion is a highly efficient concrete compound pore plug. In recent years, a large number of engineering practices have proved that adding an appropriate amount of long-chain fatty acid ammonium salt chain emulsion to concrete can fill the pores and capillaries in concrete. Channels, significantly reduce the capillary water absorption coefficient and chloride ion migration coefficient of concrete, and increase the service life of concrete. However, for the application of concrete admixtures in construction projects, the co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/42C04B28/02C04B103/65C04B111/27
CPCC04B28/02C04B40/0039C04B2103/65C04B2111/00025C04B2111/00293C04B2111/27C04B22/06C04B24/122C04B24/42C04B24/085C04B18/141C04B18/08C04B14/06C04B14/02C04B2103/0068
Inventor 李相国郑翰城张超灿吴胜利阮家浩
Owner WUHAN UNIV OF TECH
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