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Preparation method of self-lubricating microcapsule/MC nylon composite material

A nylon composite material and microcapsule technology, which is applied in the direction of microcapsule preparation, microsphere preparation, lubricating composition, etc., can solve problems such as large differences in chemical structure, depletion of liquid lubricant, and decline in mechanical properties, and achieve friction reduction Wear resistance, reduce friction coefficient and wear rate, reduce direct friction effect

Inactive Publication Date: 2020-04-21
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although liquid lubricants have a better lubricating effect, in practice, depletion of liquid lubricants is a serious problem
This reduces application time and thus limits their range of application
Additional liquid lubricants for external lubrication are not suitable for oil-sensitive materials or oil-free applications
Finally, the chemical structure difference between the liquid lubricant and the polymer molecule is relatively large, and it is easy to separate from the microphase of the resin matrix, so that its mechanical properties are greatly reduced

Method used

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  • Preparation method of self-lubricating microcapsule/MC nylon composite material
  • Preparation method of self-lubricating microcapsule/MC nylon composite material
  • Preparation method of self-lubricating microcapsule/MC nylon composite material

Examples

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Embodiment 1

[0033] A preparation method of self-lubricating microcapsule / MC nylon composite material, comprising the following steps:

[0034] Step 1: Stir and dissolve polyethersulfone pellets in dichloromethane at 25°C to obtain a microcapsule shell precursor; wherein the mass ratio of polyethersulfone to dichloromethane is 1:20.

[0035] Step 2: Add polyvinyl alcohol as a dispersant and calcium lignosulfonate as an emulsifier into deionized water, stir at room temperature to dissolve and disperse evenly, then add liquid paraffin, and shear and emulsify at 5000rpm to obtain a microcapsule core layer precursor; wherein the liquid paraffin is the same as that in step 1 The mass ratio of polyethersulfone is 1.5:1; the mass ratio of polyvinyl alcohol, calcium lignosulfonate and deionized water is 1:1:100.

[0036] Step 3: Add the microcapsule core layer precursor obtained in step 2 to the microcapsule shell precursor obtained in step 1 under ice bath conditions, mix under the shearing actio...

Embodiment 2

[0042] A preparation method of self-lubricating microcapsule / MC nylon composite material, comprising the following steps:

[0043] Step 1: Stir and dissolve polyethersulfone pellets in dichloromethane at 25°C to obtain a microcapsule shell precursor; wherein the mass ratio of polyethersulfone to dichloromethane is 1:20.

[0044] Step 2: Add polyvinyl alcohol as a dispersant and calcium lignosulfonate as an emulsifier into deionized water, stir at room temperature to dissolve and disperse evenly, then add liquid paraffin, and shear and emulsify at 5000rpm to obtain a microcapsule core layer precursor; wherein the liquid paraffin is the same as that in step 1 The mass ratio of polyethersulfone is 1.5:1; the mass ratio of polyvinyl alcohol, calcium lignosulfonate and deionized water is 1:1:100.

[0045]Step 3: Add the microcapsule core layer precursor obtained in step 2 to the microcapsule shell precursor obtained in step 1 under ice bath conditions, mix under the shearing action...

Embodiment 3

[0051] A preparation method of self-lubricating microcapsule / MC nylon composite material, comprising the following steps:

[0052] Step 1: Stir and dissolve polyethersulfone pellets in dichloromethane at 25°C to obtain a microcapsule shell precursor; wherein the mass ratio of polyethersulfone to dichloromethane is 1:20.

[0053] Step 2: Add polyvinyl alcohol as a dispersant and calcium lignosulfonate as an emulsifier into deionized water, stir at room temperature to dissolve and disperse evenly, then add liquid paraffin, and shear and emulsify at 5000rpm to obtain a microcapsule core layer precursor; wherein the liquid paraffin is the same as that in step 1 The mass ratio of polyethersulfone is 1.5:1; the mass ratio of polyvinyl alcohol, calcium lignosulfonate and deionized water is 1:1:100.

[0054] Step 3: Add the microcapsule core layer precursor obtained in step 2 to the microcapsule shell precursor obtained in step 1 under ice bath conditions, mix under the shearing actio...

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Abstract

The invention discloses a preparation method of a self-lubricating microcapsule / MC nylon composite material. The preparation method comprises the following steps: 1, preparing a microcapsule shell layer precursor, 2, preparing a microcapsule core layer precursor, 3, adding the microcapsule core layer precursor into the microcapsule shell layer precursor, carrying out mixing, cleaning and drying toobtain a liquid paraffin / polyethersulfone microcapsule, 4, heating caprolactam CL to be completely molten, and then adding the liquid paraffin / polyethersulfone microcapsules obtained in the step 3 into the melt, 5, adding a catalyst and an activating agent into the melt, and carrying out stirring to obtain a to-be-polymerized system of MC nylon monomers and microcapsules, and 6, pouring the to-be-polymerized system obtained in the step 5 into a mold, carrying out heat preservation for t3, and cooling and demolding after the reaction and curing are completed, so as to obtain the required self-lubricating microcapsule / MC nylon composite material. The oil-containing microcapsule prepared by the invention is used as a filler and is added into MC nylon prepared by anionic ring-opening polymerization, so that the self-lubricating property of the MC nylon is improved, and the wear rate is reduced.

Description

technical field [0001] The invention relates to the technical field of polymer friction and wear, in particular to a preparation method of a self-lubricating microcapsule / MC nylon composite material. Background technique [0002] Monomer cast nylon 6 (MC nylon) is a new type of engineering plastic obtained by anionic polymerization, which is characterized by high reaction viscosity and short molding cycle. And its average molecular weight is much higher than that of hydrolytic polymerization. Therefore, it has the characteristics of simple process, low polymerization temperature, large molecular weight, high crystallinity, corrosion resistance, wear resistance, good self-lubrication, and better mechanical properties than general PA6 (Tribology Letters, 2014, 54(2):161-170. ). However, when pure MC nylon is used under high load, its self-lubrication and wear resistance are not good, and its volume wear rate is large; the pure dry friction coefficient is too high, and it is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/02C08L91/00C08L81/06C08L29/04C08L97/00B01J13/04C08G69/16C10M169/04C10N50/00
CPCB01J13/043C08G69/16C08L77/02C08L2205/035C08L2205/18C10M169/044C10M2205/163C10M2209/104C10M2219/044C08L91/00C08L81/06C08L29/04C08L97/005
Inventor 钟淦基高萍苹李忠明雷军
Owner SICHUAN UNIV
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