Journal of Vinyl and Additive Technology最新文献

{"title":"Development of multilayer composite film based on protein‐polysaccharides with the addition of onion waste extracts and their impact on the shallot quality","authors":"P. Thivya, N. Bhanu Prakash Reddy, V. R. Sinija","doi":"10.1002/vnl.22163","DOIUrl":"https://doi.org/10.1002/vnl.22163","url":null,"abstract":"<jats:label/>At present, multilayer composite film is attractive in the production of biodegradable films due to its essential film properties. The current study mainly focused on overcoming the problems of poor water barrier and mechanical strength observed in monolayer films (SA‐CMC and G/SA‐CMC) made from gluten (G), sodium alginate (SA), and carboxymethylcellulose (CMC). The film was developed with the addition of onion waste extracts (OWEs), primarily from peel and stalk, to enhance functional properties. The multilayer composite film consists of three layers: an outer layer made of G, an inner layer made of SA, CMC, and a middle layer made of G/SA‐CMC. The developed composite film exhibited improved physical properties (thickness: 0.348–0.629 mm and moisture: 20.889%–21.403%), mechanical properties (tensile strength: 21.943–20.640 MPa), and barrier properties (WVP: 0.212–0.516 g/<jats:ext-link xmlns:xlink=\"http://www.w3.org/1999/xlink\" xlink:href=\"http://m.s.pa\">m.s.Pa</jats:ext-link> × 10<jats:sup>−14</jats:sup>) compared to monolayer films (SA‐CMC and G/SA‐CMC). The addition of OWEs enhanced the multilayer film's phenolic (20.076 and 36.175 mgGAE/g) and antioxidant activity (73.850% and 42.667%). The study found that the multilayer control film had minimal changes in weight loss (9.75% ± 0.18%) and firmness (6.68 ± 0.64 N) compared to OWEs‐added films (9.93% ± 0.49–10.02% ± 0.14% and 6.61 ± 0.37 to 6.64 ± 0.18 N). However, fresh‐peeled shallot onion packed with control film exhibited higher bacterial counts (6.70 ± 0.42 CFU/g) and yeast and mold counts (5.08 ± 0.20 CFU/g) than those packed with the OWEs‐added film (6.49 ± 0.28–6.56 ± 0.27 CFU/g and 4.75 ± 0.18–4.89 ± 0.21 CFU/g), indicating that OWEs protect the onions from microbial degradation. Overall, the multilayer control film (without OWEs) showed better results for storing the fresh‐peeled shallot onion at 4°C for 21 days.Highlights<jats:list list-type=\"bullet\"> <jats:list-item>Onion waste extracts have potent high antioxidant and antimicrobial properties</jats:list-item> <jats:list-item>Multilayer film's physical, mechanical, barrier, and functional properties improved</jats:list-item> <jats:list-item>Addition of onion waste extracts increased the film's antimicrobial activity</jats:list-item> <jats:list-item>Control film showed a better effect for storing fresh‐peeled shallot onion</jats:list-item> <jats:list-item>Developed film can store fresh‐peeled shallot onion for 21 days at 4°C.</jats:list-item> </jats:list>","PeriodicalId":17473,"journal":{"name":"Journal of Vinyl and Additive Technology","volume":"5 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142216049","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Exploring the tribological impact of micaceous additives in copper‐free automobile brake friction composites","authors":"G. Sathyamoorthy, Vijay Raghunathan, Sanjay Mavinkere Rangappa, Suchart Siengchin, D. Lenin Singaravelu","doi":"10.1002/vnl.22142","DOIUrl":"https://doi.org/10.1002/vnl.22142","url":null,"abstract":"<jats:label/>This study investigates the tribological impact of incorporating micaceous additives in copper‐free brake friction composites for automotive applications. Four brake pad formulations were created, each containing different amounts of muscovite and phlogopite, ranging from 0% to 10% by weight. A brake pad comparison was conducted by replacing mica with synthetic barites. The physical, thermal, mechanical, and chemical properties of the fabricated brake friction composite were examined. Tribological features were evaluated through inertia brake dynamometer testing following the JASO‐C‐406 schedule. Scanning electron microscope (SEM) analysis delved into contact plateau formations and back transfer patches on the brake pad's surfaces. Notably, phlogopite‐based pads exhibited enhanced thermal stability and efficient heat dissipation, contributing to sustained tribological performance. Overall, the comprehensive evaluation using the multiple objective optimization by ratio analysis (MOORA) method positioned phlogopite‐based brake pads as the optimal choice for optimized braking performances.Highlights<jats:list list-type=\"bullet\"> <jats:list-item>Exploration of micaceous additives as an ingredient in brake friction composite.</jats:list-item> <jats:list-item>Phlogopite‐based brake pads showed better fade and recovery performance.</jats:list-item> <jats:list-item>Phlogopite‐based brake pads exhibited low pad wear and rotor wear.</jats:list-item> <jats:list-item>MOORA optimization positioned phlogopite‐based brake pads as the optimal choice.</jats:list-item> </jats:list>","PeriodicalId":17473,"journal":{"name":"Journal of Vinyl and Additive Technology","volume":"33 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141742625","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}