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Temperature-sensitive dispersing agent, temperature-sensitive suspending liquid and application of temperature-sensitive dispersing agent and temperature-sensitive suspending liquid

A dispersant, temperature-sensitive technology

Inactive Publication Date: 2014-12-03
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is very difficult to completely mix the suspension (especially with a high solid volume fraction) and the additive, and it is also very complicated to change the external conditions of the suspension.

Method used

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  • Temperature-sensitive dispersing agent, temperature-sensitive suspending liquid and application of temperature-sensitive dispersing agent and temperature-sensitive suspending liquid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～6

[0032] Preparation of Si by Graft Copolymer Type Temperature Sensitive Dispersant Polyethyleneimine-Polyethylene Oxide Monomethyl Ether (PEI-g-PEO) 3 N 4 Thermosensitive suspension.

[0033] First, synthesis of temperature-sensitive polyoxyethylene monomethyl ether macromonomer (PEO macromonomer): adding polyoxyethylene monomethyl ether (2.25 g, 4.5 mmol) with a molecular weight of 500 and triethylamine ( 2.27g, 3.15mL), slowly added dropwise acryloyl chloride (2.03g, 1.84mL) under nitrogen protection at 0°C; after 30min, the temperature was raised to room temperature, and the reaction was continued for 24h. After the reaction, the precipitate produced by the reaction was filtered off; the product in the filtrate washed out with petroleum ether was the temperature-sensitive polyoxyethylene monomethyl ether macromonomer (PEO macromonomer). Then, synthesize the thermosensitive dispersant: the PEO macromonomer of different ratios and polyethyleneimine (PEI, molecular weight is ...

Embodiment 7～10

[0038] Preparation of Si by Graft Copolymer Type Temperature Sensitive Dispersant Polyethyleneimine-Polyethylene Oxide Monomethyl Ether (PEI-g-PEO) 3 N 4 ceramics.

[0039] The temperature-sensitive dispersant PEI-g-PEO and ceramic powder in the temperature-sensitive suspension in Example 1 are adjusted, and the sintering aid Y is added 2 o 3 with La 2 o 3 (see Table 2 for the specific addition amount), then continue ball milling for 2 hours, and then pour into the mold after defoaming; the mold is placed in a blast drying oven and kept at 60°C for 2 hours to make the temperature-sensitive dispersant generate affinity - Hydrophobic transition, the rheological properties of the suspension, such as the increase in the storage elastic modulus, solidification occurs, and then the upper layer of water is poured out, and then placed at 80°C for 4 hours to dry the green body, and then the green body is removed from the mold Then put the green body under the condition of 120°C fo...

Embodiment 11

[0044] Preparation of ZrO by Block Copolymer Type Thermosensitive Dispersant Polyacrylic Acid-Polyoxyethylene Monomethyl Ether (PAA-b-PEO) 2 Thermosensitive suspension.

[0045] Polyoxyethylene monomethyl ether MPEO (0.2g, 1mmol) and polyacrylic acid PAA (4.27g, 4mmol) were dissolved in 20mL tetrahydrofuran, and after stirring and dispersing evenly, N,N'-dicyclohexylcarbodiimide DCC ( 1.03g, 5mmol) and an appropriate amount of dimethylaminopyridine DMAP, continue to react at 50°C for 16 hours, after the reaction is completed, remove the insoluble matter by filtration, add the filtrate dropwise to 300mL of chloroform, and wash the precipitate obtained with ethyl acetate solvent for 3 After the second time, it was vacuum dried for 24 hours to obtain the temperature-sensitive dispersant PAA-b-PEO.

[0046] The thermosensitive dispersant PAA-b-PEO (4g) and ZrO 2 The powder (160 g) was added into 10 mL of deionized water and ball-milled together to prepare a suspension. Wherein,...

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Abstract

The invention discloses a temperature-sensitive dispersing agent, a temperature-sensitive suspending liquid and application of temperature-sensitive dispersing agent and temperature-sensitive suspending liquid. The temperature-sensitive dispersing agent is a graft copolymer prepared by grafting a temperature-sensitive monomer on the homopolymerized main polymer chain of a dispersive monomer or a block polymer prepared by carrying out block copolymerization on the temperature-sensitive monomer and a dispersive monomer. The prepared temperature-sensitive dispersing agent has the hydrophilic-hydrophobic interconversion characteristic under the stimulation of different temperatures and can be prepared into the temperature-sensitive suspending liquid by being ground and dispersed with a power material; the prepared temperature-sensitive suspending liquid has good dispersity, the rheological property of the temperature-sensitive suspending liquid can be regulated and controlled by controlling temperature change, and the temperature-sensitive suspending liquid can be widely applied to the fields of ceramic wet forming, cement grouting, orifice well plugging of well drilling and the like.

Description

technical field [0001] The present invention relates to a temperature-sensitive dispersant, a temperature-sensitive suspension and their application; it belongs to the scope of suspension rheology, Background technique [0002] With the development of industrial technology, suspensions are more and more widely used in fields such as petroleum, pharmaceuticals, food, coatings and new materials. During the application of the suspension, it is particularly important to control the rheological properties of the suspension. For example, in the process of oil drilling, in order to avoid the phenomenon of "blowout", fluid liquid (such as propionamide aqueous solution) is often injected in the later stage of drilling. After the liquid enters the well, the organic monomer in the liquid (Acrylamide) polymerization reaction occurs, the viscosity of the liquid increases, and the well hole is blocked. In the construction industry, the pouring of cement slurry often requires it to be in...

Claims

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Application Information

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IPC IPC(8): C08G81/00C08G81/02C08F265/10C08F220/06C08F220/54C04B35/634C04B24/26C09K8/42
Inventor 王小锋王日初张斗罗行
Owner CENT SOUTH UNIV
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