Study on the tribological properties of modified polyurethane material for water‐lubricated stern bearing

Jiang, Shaoli; Guo, Zhiwei; Yuan, Chengqing; Liu, Aixue; Bai, Xiuqin

doi:10.1002/app.46305

Cited by 23 publications

(15 citation statements)

References 54 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Five different polyurethane materials were prepared for testing, and different MOCA dosage factors were used for the five materials (NH 2 /NCO, mass ratio of amines curing agent, and PU prepolymers) The five ratios chosen were 0.90, 0.95, 1.00, 1.05, and 1.10 because the polyurethane materials showed superior performance in this range of chain expansion factors in previous studies 34 . The calculation formula is as follows 34

m_{ca} goodbreak= \frac{m_{pre} \times NCO % \times 133.5 \times f}{42},

where, f is the cross‐linked chain expansion coefficient (NH 2 /NCO), m ca is the mass required for MOCA, m pre is the mass required for prepolymer, weight % of the isocyanate group of prepolymer NCO%, 133.5 is the amine equivalent of MOCA, the amine equivalent is the average molecular mass occupied by each functional group, and the relative molecular mass of MOCA is 267, contains two amino groups and the molar mass of the NCO group is 42.…”

Section: Methodsmentioning

confidence: 99%

“…The tribological properties of polyurethane composites modified with polyethylene wax are better than those of THORON and other commercial materials under high temperatures and high loads. Based on previous research, the researchers compared the effect of high temperature on the wear resistance of water‐lubricated bearings by comparing the thermal conductivity of different metal wires through experiments 34–37 . However, when using these methods, several issues related to the reaction process and the material itself need to be considered, the dispersion of the filler in the matrix, the effect of the filler on the internal structure of the material, and the degree of bonding with the matrix inside the material.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effect of chain extender content on tribological properties of polyurethane under water‐lubrication

Guo

Huang

et al. 2023

J of Applied Polymer Sci

Self Cite

View full text Add to dashboard Cite

Polyurethane has been extensively studied as a multifunctional material for water‐lubricated bearing materials. As one of the polyurethane elastomeric synthetic material, the content of 4,4′‐methylene bis(2‐chloroaniline) (MOCA) directly affects the intermolecular structure and thus the properties of the material. Five samples with different MOCA contents were prepared by casting molding and tested. The results showed that the optimal comprehensive performance was obtained when the ratio of the amino group to the hydrocyanic acid group was 0.95, with tensile, compressive, and bending strengths of 50.1, 91.8, and 12.6 MPa, respectively. Compared with other samples, the surface of the sample was smooth, which was conducive to the formation of the water film. The bearing capacity and lubrication condition are improved, and the best tribological performance was shown. This research for the application of polyurethane elastomer on the water‐lubricated bearing provides a theoretical basis.

show abstract

m_{ca} goodbreak= \frac{m_{pre} \times NCO % \times 133.5 \times f}{42},

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of chain extender content on tribological properties of polyurethane under water‐lubrication

Guo

Huang

et al. 2023

J of Applied Polymer Sci

Self Cite

View full text Add to dashboard Cite

show abstract

“…4 However, traditional polyurethane workpieces possess a large friction coefficient and poor wear resistance, limiting their large-scale applications in high friction fields. 5 It is a hot topic and a challenge to improve the tribological properties of polyurethane. As we know, the most common strategy for enhancing the friction and wear properties of materials is to add solid 6−8 or liquid lubricating materials.…”

Section: Introductionmentioning

confidence: 99%

“…Thus, they are widely applied in the fields of shoe materials, cables, conveyor belts, automobiles, medicine and health, etc . However, traditional polyurethane workpieces possess a large friction coefficient and poor wear resistance, limiting their large-scale applications in high friction fields …”

Section: Introductionmentioning

confidence: 99%

Tribological Properties of Self-Lubricating Thermoplastic Polyurethane/Oil-Loaded Microcapsule Composites Based on Melt Processing

Mao

Gao

Sun

et al. 2021

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

In this work, we have developed a novel potential approach for large-scale preparation of self-lubricating thermoplastic polyurethane (TPU) composites, based on melt processing of TPU with polyurea formaldehyde (PUF) microcapsules containing lube base oil. Compared with pure TPU, the composites containing 5 and 10 wt % microcapsules obtain an increase in tensile strength by 23.1 and 11.0%, respectively, while the elongation at break and hardness are well maintained. Introducing 10 wt % microcapsules into TPU also significantly reduces the friction coefficient by 78.8% (0.18), as compared with pure TPU (0.85). The Akron wear volume of TPU composites containing 10 wt % microcapsules drops to 7.6 × 10 −3 cm 3 , corresponding to a decrease of 52.8% (from 16.1 × 10 −3 cm 3 for pure TPU). This study has realized melt-processing modification of TPU composites to improve their tribological properties without sacrificing, or even enhancing their mechanical properties, and could also open up a new way of applying microcapsules through polymer processing.

show abstract

“…Moreover, the contact pressure that influenced by the tilt of the ships are very complex and the working experimental velocities are in a wide range. In this case, it is very difficult to guarantee a stable working condition for the water‐lubricated bearings 27,28 . The water‐lubricated bearing often works under varying contact pressures and velocities.…”

Section: Introductionmentioning

confidence: 99%

Insight into water lubrication performance of polyetheretherketone

Guo

Yuan

2020

J of Applied Polymer Sci

Self Cite

View full text Add to dashboard Cite

Polyetheretherketone (PEEK) is a kind of polymer with excellent mechanical properties combined with good wear resistance and has been widely used in the engineering field. In order to explore the possibility for PEEK using as a water-lubricated bearing material, an in-depth study on the water lubrication performance of PEEK was conducted by using a series of experiments. The water lubrication performances combined with the lubricating mechanism were evaluated both by the friction coefficient and by the wear behavior of PEEK. The results indicated that PEEK was suitable for water-lubricated bearing productions. The water film could form effectively between the friction pairs under high sliding velocity, while the transfer film could form under low sliding velocity. Both the water film and the transfer film could improve the water lubrication performance for the friction pairs. Moreover, sliding velocities and contact pressures highly influence the water lubrication performance of PEEK. The increase in contact pressure or the decrease in sliding velocity would exacerbate the wear of material. The stick-slip phenomena also occurred on the specimens under low sliding velocity. The main purpose of this study is to provide an experimental basis for PEEK using as a waterlubricated bearing material.

show abstract

Study on the tribological properties of modified polyurethane material for water‐lubricated stern bearing

Cited by 23 publications

References 54 publications

Effect of chain extender content on tribological properties of polyurethane under water‐lubrication

Effect of chain extender content on tribological properties of polyurethane under water‐lubrication

Tribological Properties of Self-Lubricating Thermoplastic Polyurethane/Oil-Loaded Microcapsule Composites Based on Melt Processing

Insight into water lubrication performance of polyetheretherketone

Contact Info

Product

Resources

About