Influences of the average molecular weight of phenolic resin and potassium titanate morphology on particulate emissions from brake linings

The effects of the binder resin and potassium titanate components of brake linings on the amounts of particulate matter (PM) emitted during brake applications were investigated. The studied lining specimens contained phenolic resins with different molecular weights and potassium titanate whiskers an...

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Veröffentlicht in:Wear 2020-06, Vol.450-451, p.203243, Article 203243
Hauptverfasser: Joo, Byung Soo, Jara, Diego Chavez, Seo, Hyung Jo, Jang, Ho
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creator Joo, Byung Soo
Jara, Diego Chavez
Seo, Hyung Jo
Jang, Ho
description The effects of the binder resin and potassium titanate components of brake linings on the amounts of particulate matter (PM) emitted during brake applications were investigated. The studied lining specimens contained phenolic resins with different molecular weights and potassium titanate whiskers and granules. Brake emission tests were performed using a Krauss-type brake tester enclosed within a ventilated chamber, and the PM concentration was measured by an optical particle counter. The obtained results showed that the airborne PM produced during brake applications had a unimodal particle size distribution with a peak centered at approximately 2.5 μm regardless of the lining composition. However, the wear particles settled inside the chamber were composed of agglomerated ultrafine particles, suggesting their further possible resuspension as airborne ones. The linings fabricated from the high-molecular-weight resin and granular potassium titanate exhibited low brake emissions, and the PM reduction observed for granular potassium titanate was greater at higher temperatures due to the facilitation of contact plateau formation on the lining surface. •Shape of potassium titanate affected more on emission than molecular weight of resin.•Contact plateaus on the lining surface showed a strong influence on brake emission.•Both airborne and settled particles were mainly composed of ultrafine ones.•Settled fine wear particles could resuspend at any time after brake applications.
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The linings fabricated from the high-molecular-weight resin and granular potassium titanate exhibited low brake emissions, and the PM reduction observed for granular potassium titanate was greater at higher temperatures due to the facilitation of contact plateau formation on the lining surface. •Shape of potassium titanate affected more on emission than molecular weight of resin.•Contact plateaus on the lining surface showed a strong influence on brake emission.•Both airborne and settled particles were mainly composed of ultrafine ones.•Settled fine wear particles could resuspend at any time after brake applications.</description><identifier>ISSN: 0043-1648</identifier><identifier>EISSN: 1873-2577</identifier><identifier>DOI: 10.1016/j.wear.2020.203243</identifier><language>eng</language><publisher>Amsterdam: Elsevier B.V</publisher><subject>Brake linings ; Brakes ; Cast iron ; Emission analysis ; Friction materials ; Linings ; Molecular weight ; Morphology ; Particle shape ; Particle size distribution ; Particulate emissions ; Phenolic resins ; Potassium ; Radiation counters ; Sliding wear ; Surface topography ; Ultrafines ; Wear particles</subject><ispartof>Wear, 2020-06, Vol.450-451, p.203243, Article 203243</ispartof><rights>2020 Elsevier B.V.</rights><rights>Copyright Elsevier Science Ltd. 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The linings fabricated from the high-molecular-weight resin and granular potassium titanate exhibited low brake emissions, and the PM reduction observed for granular potassium titanate was greater at higher temperatures due to the facilitation of contact plateau formation on the lining surface. •Shape of potassium titanate affected more on emission than molecular weight of resin.•Contact plateaus on the lining surface showed a strong influence on brake emission.•Both airborne and settled particles were mainly composed of ultrafine ones.•Settled fine wear particles could resuspend at any time after brake applications.</description><subject>Brake linings</subject><subject>Brakes</subject><subject>Cast iron</subject><subject>Emission analysis</subject><subject>Friction materials</subject><subject>Linings</subject><subject>Molecular weight</subject><subject>Morphology</subject><subject>Particle shape</subject><subject>Particle size distribution</subject><subject>Particulate emissions</subject><subject>Phenolic resins</subject><subject>Potassium</subject><subject>Radiation counters</subject><subject>Sliding wear</subject><subject>Surface topography</subject><subject>Ultrafines</subject><subject>Wear particles</subject><issn>0043-1648</issn><issn>1873-2577</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2020</creationdate><recordtype>article</recordtype><recordid>eNp9kMtOwzAQRS0EEuXxA6wssU7xK3EisUEVj0pIbGBtOe6kdUnsYDsgfoGvxlFZs5lZzL13Zg5CV5QsKaHVzX75BTosGWEkF84EP0ILWktesFLKY7QgRPCCVqI-RWcx7gkhtCmrBfpZu66fwBmI2Hc47QDrTwh6C3jwPZip1wF_gd3u0jwfd-B8bw0OEK3D2m3w6JOO0U4DTjZpp9PsDOPO9377jb3Dow7JzkF5AoPNWu8i7oIfcBv0O-DeOuu28QKddLqPcPnXz9Hbw_3r6ql4fnlcr-6eC8NZnQrd1i1tWcklhQagacEIMKzK_3S1JGUpS1PSxjAha7IxtQGjW9kJKUvW6Ebwc3R9yB2D_5ggJrX3U3B5pcrcpOC8EjSr2EFlgo8xQKfGYAcdvhUlamau9mpmrmbm6sA8m24PJsj3f1oIKho7w93YACapjbf_2X8Ba02NvA</recordid><startdate>20200615</startdate><enddate>20200615</enddate><creator>Joo, Byung Soo</creator><creator>Jara, Diego Chavez</creator><creator>Seo, Hyung Jo</creator><creator>Jang, Ho</creator><general>Elsevier B.V</general><general>Elsevier Science Ltd</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>7TB</scope><scope>7U5</scope><scope>8BQ</scope><scope>8FD</scope><scope>FR3</scope><scope>JG9</scope><scope>L7M</scope></search><sort><creationdate>20200615</creationdate><title>Influences of the average molecular weight of phenolic resin and potassium titanate morphology on particulate emissions from brake linings</title><author>Joo, Byung Soo ; Jara, Diego Chavez ; Seo, Hyung Jo ; Jang, Ho</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c328t-ab8b1b25371e9ee9bec4ec26195f8705575c519c24780dc8cecab7f477529a943</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2020</creationdate><topic>Brake linings</topic><topic>Brakes</topic><topic>Cast iron</topic><topic>Emission analysis</topic><topic>Friction materials</topic><topic>Linings</topic><topic>Molecular weight</topic><topic>Morphology</topic><topic>Particle shape</topic><topic>Particle size distribution</topic><topic>Particulate emissions</topic><topic>Phenolic resins</topic><topic>Potassium</topic><topic>Radiation counters</topic><topic>Sliding wear</topic><topic>Surface topography</topic><topic>Ultrafines</topic><topic>Wear particles</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Joo, Byung Soo</creatorcontrib><creatorcontrib>Jara, Diego Chavez</creatorcontrib><creatorcontrib>Seo, Hyung Jo</creatorcontrib><creatorcontrib>Jang, Ho</creatorcontrib><collection>CrossRef</collection><collection>Engineered Materials Abstracts</collection><collection>Mechanical &amp; Transportation Engineering Abstracts</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Engineering Research Database</collection><collection>Materials Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Wear</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Joo, Byung Soo</au><au>Jara, Diego Chavez</au><au>Seo, Hyung Jo</au><au>Jang, Ho</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Influences of the average molecular weight of phenolic resin and potassium titanate morphology on particulate emissions from brake linings</atitle><jtitle>Wear</jtitle><date>2020-06-15</date><risdate>2020</risdate><volume>450-451</volume><spage>203243</spage><pages>203243-</pages><artnum>203243</artnum><issn>0043-1648</issn><eissn>1873-2577</eissn><abstract>The effects of the binder resin and potassium titanate components of brake linings on the amounts of particulate matter (PM) emitted during brake applications were investigated. The studied lining specimens contained phenolic resins with different molecular weights and potassium titanate whiskers and granules. Brake emission tests were performed using a Krauss-type brake tester enclosed within a ventilated chamber, and the PM concentration was measured by an optical particle counter. The obtained results showed that the airborne PM produced during brake applications had a unimodal particle size distribution with a peak centered at approximately 2.5 μm regardless of the lining composition. However, the wear particles settled inside the chamber were composed of agglomerated ultrafine particles, suggesting their further possible resuspension as airborne ones. 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subjects Brake linings
Brakes
Cast iron
Emission analysis
Friction materials
Linings
Molecular weight
Morphology
Particle shape
Particle size distribution
Particulate emissions
Phenolic resins
Potassium
Radiation counters
Sliding wear
Surface topography
Ultrafines
Wear particles
title Influences of the average molecular weight of phenolic resin and potassium titanate morphology on particulate emissions from brake linings
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