Journal of materials science. Polymers最新文献

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Electrospun biodegradable polycaprolactone filter media for filtering facepiece respirators. 电纺可生物降解聚己内酯过滤介质，用于过滤面罩式呼吸器。

Journal of materials science. Polymers Pub Date : 2026-01-01 Epub Date: 2026-06-23 DOI: 10.1007/s44493-026-00021-6

Nathan Ewell, Sophie Fleishman, Kristen Mulherin, Gregory C Rutledge

{"title":"Electrospun biodegradable polycaprolactone filter media for filtering facepiece respirators.","authors":"Nathan Ewell, Sophie Fleishman, Kristen Mulherin, Gregory C Rutledge","doi":"10.1007/s44493-026-00021-6","DOIUrl":"10.1007/s44493-026-00021-6","url":null,"abstract":"Filtering facepiece respirators (FFRs) protect against disease transmission and other harmful air pollutants through the collection of incident aerosolized particulates. Conventional disposable FFRs, featuring meltblown polypropylene filter layers, rely on electrostatic charges to achieve N95 performance and are not biodegradable. Electrospun filters can achieve high filtration performance without electrostatic charging due to their small fiber size and may be fabricated from environmentally degradable materials. In this work, we design filter media made of biodegradable poly(ε-caprolactone) (PCL) nanofibers electrospun from a relatively benign solvent system. These media meet N95 performance targets for filtration efficiency and inhalation and exhalation resistance under laboratory test conditions. Moreover, we demonstrate the fabrication of media having average fiber diameters between 60 nm and 300 nm, and we propose combinations of fiber diameter, solidity, and basis weight that produce filters meeting N95 targets. Our results indicate that selecting electrospun media with particularly small diameter fibers leads to better filtration performance with less material and enhanced rates of degradation. Using these insights, we fabricate prototype duckbill-style respirators featuring an electrospun PCL filter layer sandwiched between polylactic acid spunbond support layers. These prototypes meet the N95 criteria for filtration efficiency and breathing resistance under the tested conditions.Supplementary information: The online version contains supplementary material available at 10.1007/s44493-026-00021-6.","PeriodicalId":521385,"journal":{"name":"Journal of materials science. Polymers","volume":"1 1","pages":"21"},"PeriodicalIF":0.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13290954/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148335701","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Piezoelectric properties of PVDF/PLA blends prepared by melt processing and electrospinning. 熔体加工和静电纺丝法制备PVDF/PLA共混物的压电性能。

Journal of materials science. Polymers Pub Date : 2026-01-01 Epub Date: 2026-04-01 DOI: 10.1007/s44493-026-00010-9

Chloé Melin, Jean-Fabien Capsal, Ricardo Zednik, Angelo Pommella, Nicole Demarquette, Jean-Marc Chenal

{"title":"Piezoelectric properties of PVDF/PLA blends prepared by melt processing and electrospinning.","authors":"Chloé Melin, Jean-Fabien Capsal, Ricardo Zednik, Angelo Pommella, Nicole Demarquette, Jean-Marc Chenal","doi":"10.1007/s44493-026-00010-9","DOIUrl":"10.1007/s44493-026-00010-9","url":null,"abstract":"Understanding how polymer blending and processing routes influence the piezoelectric performance of PVDF is crucial for designing high-performance flexible sensors and energy harvesters. In this study, the effect of incorporating polylactic acid (PLA) and varying the processing method on the β-phase content, crystallinity, and piezoelectric response (d₃₃) of PVDF-based materials is investigated. Melt-processed PVDF/PLA blends (5% and 40% PLA) exhibited distinct morphologies, from beaded to co-continuous structures. While PLA addition did not significantly alter overall crystallinity, the β-phase fraction decreased sharply at 40% PLA. After poling, the stretched 95/05 blend showed a 34-45% lower d₃₃ than pure PVDF despite similar β-phase fractions, due to permittivity differences that concentrated the poling field in PLA domains and stretching-induced voids, reducing the effective field in PVDF. The 60/40 co-continuous blend displayed no measurable d₃₃ because α-phase predominated, likely caused by insufficient stress transfer to PVDF during stretching. Electrospinning increased both crystallinity and electroactive phase content compared with stretched films. PVDF electrospun membranes exhibited a 30% higher d₃₃ than their stretched counterparts. However, PVDF/PLA 95/05 electrospun membranes showed no piezoelectric response, likely due to small PLA domains disrupting local electric fields, hindering PVDF chain alignment, and enhancing interfacial interactions that prevent chain rotation during poling. Overall, composition and processing route govern the piezoelectric performance of PVDF/PLA systems, demonstrating that β-phase presence alone does not guarantee functional piezoelectricity.Supplementary information: The online version contains supplementary material available at 10.1007/s44493-026-00010-9.","PeriodicalId":521385,"journal":{"name":"Journal of materials science. Polymers","volume":"1 1","pages":"13"},"PeriodicalIF":0.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13131237/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147825928","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0