{"title":"海洋环境对多孔油浸/超高分子量聚乙烯复合材料摩擦性能的影响及分子动力学模拟","authors":"Liming Zhu, Bingli Pan, Yongli Yang, Longlong Zhang, Haoyu Gao, Zhiqing Tian, Yadi Wang, Sanming Du","doi":"10.1007/s13726-024-01424-4","DOIUrl":null,"url":null,"abstract":"<div><p>The frictional performance of modified porous ultra-high molecular weight polyethylene (UHMWPE) oil-containing composite materials under pure water and seawater conditions is studied using nano aluminum oxide (nano-Al<sub>2</sub>O<sub>3</sub>) as filler and three different particle sizes of sodium chloride powder as the pore-forming agents. Experimental results showed that compared to pure UHMWPE, the friction coefficient (COF) of a 100/Al<sub>2</sub>O<sub>3</sub>/UHMWPE oil-containing composite material decreases by 68%. Further, using the friction behavior of the 100/Al<sub>2</sub>O<sub>3</sub>/UHMWPE oil-containing composite material under oil-only conditions as the control, it is observed that water molecules disrupt the transfer oil film formed during friction when pure water and seawater are present. However, due to the presence of water molecules, the abrasion debris generated during the friction process is promptly flushed away, effectively reducing the surface roughness and wear rate of the 100/Al<sub>2</sub>O<sub>3</sub>/UHMWPE oil-containing composite material. Based on experimental research, molecular dynamics (MD) simulation analysis was conducted to elucidate the main reasons for the variation in COF of the 100/Al<sub>2</sub>O<sub>3</sub>/UHMWPE in water and seawater. The simulation results indicated that the presence of water molecules and seawater components during the friction process reduces the interfacial interaction energy between the oil-containing polymer material and the friction pair, leading to the formation of an unstable friction transfer film. Therefore, the higher COF of the 100/Al<sub>2</sub>O<sub>3</sub>/UHMWPE oil-containing composite material in pure water and seawater environments compared to pure 100/Al<sub>2</sub>O<sub>3</sub>/UHMWPE oil-containing composite material is explained.</p><h3>Graphical abstract</h3>\n<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":601,"journal":{"name":"Iranian Polymer Journal","volume":"34 7","pages":"963 - 975"},"PeriodicalIF":2.8000,"publicationDate":"2024-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Effects of marine environment on frictional properties of porous oil-impregnated ɑ-Al2O3/UHMWPE composites and molecular dynamics simulation\",\"authors\":\"Liming Zhu, Bingli Pan, Yongli Yang, Longlong Zhang, Haoyu Gao, Zhiqing Tian, Yadi Wang, Sanming Du\",\"doi\":\"10.1007/s13726-024-01424-4\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>The frictional performance of modified porous ultra-high molecular weight polyethylene (UHMWPE) oil-containing composite materials under pure water and seawater conditions is studied using nano aluminum oxide (nano-Al<sub>2</sub>O<sub>3</sub>) as filler and three different particle sizes of sodium chloride powder as the pore-forming agents. Experimental results showed that compared to pure UHMWPE, the friction coefficient (COF) of a 100/Al<sub>2</sub>O<sub>3</sub>/UHMWPE oil-containing composite material decreases by 68%. Further, using the friction behavior of the 100/Al<sub>2</sub>O<sub>3</sub>/UHMWPE oil-containing composite material under oil-only conditions as the control, it is observed that water molecules disrupt the transfer oil film formed during friction when pure water and seawater are present. However, due to the presence of water molecules, the abrasion debris generated during the friction process is promptly flushed away, effectively reducing the surface roughness and wear rate of the 100/Al<sub>2</sub>O<sub>3</sub>/UHMWPE oil-containing composite material. Based on experimental research, molecular dynamics (MD) simulation analysis was conducted to elucidate the main reasons for the variation in COF of the 100/Al<sub>2</sub>O<sub>3</sub>/UHMWPE in water and seawater. The simulation results indicated that the presence of water molecules and seawater components during the friction process reduces the interfacial interaction energy between the oil-containing polymer material and the friction pair, leading to the formation of an unstable friction transfer film. Therefore, the higher COF of the 100/Al<sub>2</sub>O<sub>3</sub>/UHMWPE oil-containing composite material in pure water and seawater environments compared to pure 100/Al<sub>2</sub>O<sub>3</sub>/UHMWPE oil-containing composite material is explained.</p><h3>Graphical abstract</h3>\\n<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>\",\"PeriodicalId\":601,\"journal\":{\"name\":\"Iranian Polymer Journal\",\"volume\":\"34 7\",\"pages\":\"963 - 975\"},\"PeriodicalIF\":2.8000,\"publicationDate\":\"2024-11-27\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Iranian Polymer Journal\",\"FirstCategoryId\":\"92\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s13726-024-01424-4\",\"RegionNum\":3,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"POLYMER SCIENCE\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Iranian Polymer Journal","FirstCategoryId":"92","ListUrlMain":"https://link.springer.com/article/10.1007/s13726-024-01424-4","RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"POLYMER SCIENCE","Score":null,"Total":0}
Effects of marine environment on frictional properties of porous oil-impregnated ɑ-Al2O3/UHMWPE composites and molecular dynamics simulation
The frictional performance of modified porous ultra-high molecular weight polyethylene (UHMWPE) oil-containing composite materials under pure water and seawater conditions is studied using nano aluminum oxide (nano-Al2O3) as filler and three different particle sizes of sodium chloride powder as the pore-forming agents. Experimental results showed that compared to pure UHMWPE, the friction coefficient (COF) of a 100/Al2O3/UHMWPE oil-containing composite material decreases by 68%. Further, using the friction behavior of the 100/Al2O3/UHMWPE oil-containing composite material under oil-only conditions as the control, it is observed that water molecules disrupt the transfer oil film formed during friction when pure water and seawater are present. However, due to the presence of water molecules, the abrasion debris generated during the friction process is promptly flushed away, effectively reducing the surface roughness and wear rate of the 100/Al2O3/UHMWPE oil-containing composite material. Based on experimental research, molecular dynamics (MD) simulation analysis was conducted to elucidate the main reasons for the variation in COF of the 100/Al2O3/UHMWPE in water and seawater. The simulation results indicated that the presence of water molecules and seawater components during the friction process reduces the interfacial interaction energy between the oil-containing polymer material and the friction pair, leading to the formation of an unstable friction transfer film. Therefore, the higher COF of the 100/Al2O3/UHMWPE oil-containing composite material in pure water and seawater environments compared to pure 100/Al2O3/UHMWPE oil-containing composite material is explained.
期刊介绍：
Iranian Polymer Journal, a monthly peer-reviewed international journal, provides a continuous forum for the dissemination of the original research and latest advances made in science and technology of polymers, covering diverse areas of polymer synthesis, characterization, polymer physics, rubber, plastics and composites, processing and engineering, biopolymers, drug delivery systems and natural polymers to meet specific applications. Also contributions from nano-related fields are regarded especially important for its versatility in modern scientific development.
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