Synthesis of novel multilayer composite microcapsules and their application in self-lubricating polymer composites

Li, Haiyan; Ma, Yingjie; Li, Zhike; Cui, Yexiang; Wang, Huaiyuan

doi:10.1016/j.compscitech.2018.05.042

Cited by 77 publications

(26 citation statements)

References 36 publications

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“…The decrease in mechanical properties is caused by the continuous increase of liquid lubricant and the agglomeration of PAO@PSF microcapsules in the PVDF matrix. [32,34].…”

Section: Mechanical Properties Of Pvdf Compositesmentioning

confidence: 99%

Influence of PAO@PSF microcapsules on the tribological properties of polyvinylidene fluoride matrix recovered from waste membranes

Liang

et al. 2023

Preprint

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In the study, the waste polyvinylidene fluoride (PVDF) membranes were recovered and the micropowders of this polymer were obtained by solvent recovery method. Moreover, the new direction for applying waste PVDF membranes to the field of tribology were developed. Thus, a novel PVDF-based tribological composite (PAO@PSF/PVDF) was fabricated with recycled PVDF micropowders acted as the matrix polymer and PAO@PSF microcapsules with the configuration of polysulfone (PSF) capsuling lubricant oil (PAO) served as the filler. The self-lubricating and wear properties of PAO@PSF/PVDF composite were tested under dry sliding condition using a ball-on-disc configuration. In particular, this kind of composite with the inclusion of 20 wt% PAO@PSF microcapsules exhibited the best tribological properties, i.e., the lowest friction coefficient (0.077) and the smallest wear rate (2.34×10-15 m3/Nm). The filling of PAO@PSF microcapsules greatly improved the antifriction and wear resistance of PVDF, guaranteeing the self-lubricating feature of this polymer. The tribological properties of PAO@PSF/PVDF composite can reach close to those under the condition of dripping lubricating oil, and the prepared PAO@PSF/PVDF self-lubricating composite can be applied to a large range of friction conditions. Furthermore, without any doubt, it will facilitate the reutilization of waste polymers.

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“…The decrease in mechanical properties is caused by the continuous increase of liquid lubricant and the agglomeration of PAO@PSF microcapsules in the PVDF matrix. [32,34].…”

Section: Mechanical Properties Of Pvdf Compositesmentioning

confidence: 99%

Influence of PAO@PSF microcapsules on the tribological properties of polyvinylidene fluoride matrix recovered from waste membranes

Liang

et al. 2023

Preprint

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“…The unique “core‐shell” structure of microcapsules allows the lubricant to be better dispersed in the matrix and the lubricant to escape from the wall under the action of shear during friction, thus improving the tribological properties of the composite. [ 103–106 ] Gao et al [ 63 ] added lubricant‐containing microcapsules to MC PA6 to make a composite coating, and the coefficient of friction and mechanical properties of the material decreased as the microcapsule content continued to increase. When the microcapsule content was too high, the composite did not bind tightly enough, and the specific wear rate increased instead; a microcapsule content of 20 wt% was most reasonable, and the friction coefficient and wear rate decreased by ~57% and 92%.…”

Section: Performance Enhancement Of Polyamide Materialsmentioning

confidence: 99%

Research on polyamide based self‐lubricating composites: A review

et al. 2022

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Owing to its good tribological and mechanical properties, polyamide material was widely applied to prepare sliding mechanical parts. A lot of studies confirmed that adding different functional materials or surface modifications to polyamide could reduce the friction coefficient, improve wear resistance and reduce water absorption, so as to prolong the service life of polyamide parts. This paper summarized the common reinforcement methods of polyamide materials: blending, surface modification and filler. The reinforcing mechanism of different fillers and polymers, the effects of different methods on the tribological properties, mechanical properties and water absorption of polyamide composites, and the preparation methods of polyamide composites have been systematically discussed.

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“…[ 1–3 ] After continuous improvement and optimization, microencapsulation technologies have been greatly developed, leading to a trend of diverse preparation methods and multiple series of preparation materials. The synthesis methods include solvent evaporation, [ 4 ] interfacial polymerization, [ 5 ] in situ polymerization, [ 6 ] sol–gel, [ 7 ] surface modification, [ 8 ] multiple assembly, [ 9 ] and so forth. Shell materials comprise polymers, inorganics, metals, and organic/inorganic hybrid materials.…”

Section: Introductionmentioning

confidence: 99%

Effects of nickel shell microcapsules and short fibers on polyamide 6‐matrix composites: Thermal, surface wetting, mechanical, and tribological properties

Zhang

Yan

et al. 2022

Polymer Composites

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The excellent lubricating properties of microcapsules have been well recognized in modified polymers though very few reports have mentioned the practical application for engineering parts. In this study, different short fibers and nickel shell microcapsules (NMS) synergistically modify PA6 and injection molded to prepare bearings. With 10 wt% NMS, the COF could be reduced from 0.45 to 0.1. Fibers can effectively overcome bearing failure resulting from crushing the matrix under high loads or rapid peeling wear at high swing frequencies, which can warrant the effective lubrication of NMS and the formation of high‐quality transfer film. The bearing long‐life test shows very stable and low COF and wear with the feasibility to utilize microcapsules modified polymers in journal bearings.

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Synthesis of novel multilayer composite microcapsules and their application in self-lubricating polymer composites

Cited by 77 publications

References 36 publications

Influence of PAO@PSF microcapsules on the tribological properties of polyvinylidene fluoride matrix recovered from waste membranes

Influence of PAO@PSF microcapsules on the tribological properties of polyvinylidene fluoride matrix recovered from waste membranes

Research on polyamide based self‐lubricating composites: A review

Effects of nickel shell microcapsules and short fibers on polyamide 6‐matrix composites: Thermal, surface wetting, mechanical, and tribological properties

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