Polymer International最新文献_第2页

A review on sustainable properties of plant fiber-reinforced polymer composites: characteristics and properties 植物纤维增强聚合物复合材料的可持续特性综述：特性和性能

IF 2.9 4区化学

Polymer International Pub Date : 2024-07-31 DOI: 10.1002/pi.6686

Mariappan Sathish, Nachimuthu Radhika, Nitin Venuvanka, Lakshminarasimhan Rajeshkumar

{"title":"A review on sustainable properties of plant fiber-reinforced polymer composites: characteristics and properties","authors":"Mariappan Sathish, Nachimuthu Radhika, Nitin Venuvanka, Lakshminarasimhan Rajeshkumar","doi":"10.1002/pi.6686","DOIUrl":"10.1002/pi.6686","url":null,"abstract":"Fiber-reinforced composites have emerged as versatile materials with applications spanning diverse industries, driven by their exceptional mechanical properties and lightweight nature. This review provides a comprehensive overview of natural fiber-reinforced composites, focusing on their enhanced mechanical and functional properties achieved through modern processing techniques. The study delves into various manufacturing methods, such as thermoforming, additive manufacturing, compression molding, electro-spinning, pultrusion and autoclave molding, which have significantly contributed to the advancement of these composites. The review further investigates the multifaceted properties of these composites, which highlights the versatility and applicability of these materials and provides a holistic understanding of their potential applications. Additionally, the work addresses current research gaps and identifies prospects, shedding light on the evolving landscape of natural fiber-reinforced composites. The synthesis of processing techniques, material properties and potential applications offers valuable insights for researchers, practitioners and industries aiming to harness the full potential of these sustainable and high-performance materials. © 2024 Society of Chemical Industry.","PeriodicalId":20404,"journal":{"name":"Polymer International","volume":null,"pages":null},"PeriodicalIF":2.9,"publicationDate":"2024-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141869948","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Reducing the moisture susceptibility of recycled hot‐mix asphalt mixture with composite modification technology 利用复合改性技术降低再生热拌沥青混合料的易受潮性

IF 3.2 4区化学

Polymer International Pub Date : 2024-07-31 DOI: 10.1002/pi.6687

Jianping Xiong, Lihao Zeng, Yuquan Yao, Jie Gao, Di Yu

{"title":"Reducing the moisture susceptibility of recycled hot‐mix asphalt mixture with composite modification technology","authors":"Jianping Xiong, Lihao Zeng, Yuquan Yao, Jie Gao, Di Yu","doi":"10.1002/pi.6687","DOIUrl":"https://doi.org/10.1002/pi.6687","url":null,"abstract":"Styrene–butadiene–styrene block copolymer (SBS)‐modified asphalt is a key material for constructing recycled hot‐mix asphalt mixtures (RHMAs). However, these mixtures still risk insufficient moisture stability. To this end, this study investigates the feasibility of asphalt composite modification technology to enhance RHMA performance. SBS, high‐viscosity agent (HVA) and crumb‐rubber materials (CRM) were used to prepare SBS‐HVA‐ and SBS‐CRM‐modified asphalt, with SBS‐modified asphalt as the control group, and the adhesion properties of the asphalt were evaluated using surface free energy tests. RHMAs with 50% reclaimed asphalt pavement were then prepared with each type of modified asphalt. The moisture susceptibility of these mixtures was analyzed using moisture‐induced sensitivity, freeze–thaw splitting and immersion Marshall tests. It was found that HVA significantly enhanced the adhesion of SBS‐modified asphalt under dry conditions, while CRM had a minimal effect. Compared to RHMA with SBS‐modified asphalt, HVA and CRM additives are crucial for enhancing the moisture stability of RHMA in the immersion Marshall test. However, CRM does not improve the moisture stability of RHMA in the moisture‐induced sensitivity and freezing–thaw splitting tests. From the conducted study, it can be proposed that SBS and HVA composite‐modified asphalt can be utilized in RHMAs to achieve higher moisture stability. © 2024 Society of Chemical Industry.","PeriodicalId":20404,"journal":{"name":"Polymer International","volume":null,"pages":null},"PeriodicalIF":3.2,"publicationDate":"2024-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141869947","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Amphiphilic ligand‐doped liquid crystal‐based detection of Hg2+ ions on polyimide surface with alkyl pendent groups 基于两亲配体掺杂液晶的聚酰亚胺表面烷基悬垂基团 Hg2+ 离子检测技术

IF 3.2 4区化学

Polymer International Pub Date : 2024-07-26 DOI: 10.1002/pi.6684

Nasir Majeed, Humaira Masood Siddiqi, Iqra Urooj, Faroha Liaqat

{"title":"Amphiphilic ligand‐doped liquid crystal‐based detection of Hg2+ ions on polyimide surface with alkyl pendent groups","authors":"Nasir Majeed, Humaira Masood Siddiqi, Iqra Urooj, Faroha Liaqat","doi":"10.1002/pi.6684","DOIUrl":"https://doi.org/10.1002/pi.6684","url":null,"abstract":"In this study, amphiphilic thiosemicarbazone was used to align liquid crystal (4‐cyano‐4′‐pentylbiphenyl) in a homeotropic way on polyimide containing alkyl pendent groups (AHDPI), which was coated on a glass slide. The amphiphilic ligands 2‐(4‐(dodecyloxy)benzylid‐ene)hydrazine‐1‐carbothioamide (DT) and 2‐(1‐dodecyl‐2‐oxoindolin‐3‐ylidene)hydrazine‐1‐carbothioamide (IT) were doped with liquid crystal (LC) to develop LC‐based sensors to detect Hg2+ ions in water. The selective interaction of carbothioamide with Hg2+ ions triggered the orientation transition of LC from homeotropic to parallel alignment and gave dark to bright optical signal at the LC/aqueous interphase. Self‐immobilization of thiosemicarbazone‐based ligands on AHDPI‐coated glass slide can be used to detect Hg2+ ions with high sensitivity. The limit of detection with DT and IT was found to be 0.5 and 0.25 μmol L−1, respectively. Density functional studies were carried out to study the interaction of the thiosemicarbazone ligands with mercuric ions, resulting in highly negative binding energies of −1.55 and −2.06 eV for DT and IT with Hg2+ ions, respectively. The chemical and thermal stability (up to 268 °C) of the AHDPI coated on glass slide made it reusable at least twice for sensor fabrication. This provides a quicker and cheaper alternative to traditional methods of sensor fabrication. © 2024 Society of Chemical Industry.","PeriodicalId":20404,"journal":{"name":"Polymer International","volume":null,"pages":null},"PeriodicalIF":3.2,"publicationDate":"2024-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141783342","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Study on the mechanical and thermal properties of aramid fibre reinforced with sawdust particulates in an epoxy matrix composite: a novel material for structural applications 研究在环氧基复合材料中使用锯屑颗粒增强芳纶纤维的机械和热性能：一种新型结构应用材料

IF 3.2 4区化学

Polymer International Pub Date : 2024-07-26 DOI: 10.1002/pi.6685

Thandavamoorthy Raja, Yuvarajan Devarajan

{"title":"Study on the mechanical and thermal properties of aramid fibre reinforced with sawdust particulates in an epoxy matrix composite: a novel material for structural applications","authors":"Thandavamoorthy Raja, Yuvarajan Devarajan","doi":"10.1002/pi.6685","DOIUrl":"https://doi.org/10.1002/pi.6685","url":null,"abstract":"This study investigates the development and characterization of a novel composite material for structural applications, aiming to address the growing demand for lightweight, durable and versatile materials. The composite integrates aramid fibre reinforced with sawdust particulates within an epoxy matrix. Methodologically, the composite was fabricated using a hand layup process, ensuring even distribution and strong adhesion between components. Mechanical testing revealed significant enhancements in tensile strength (up to 135.29 MPa) and flexural strength (up to 136.92 MPa) with the inclusion of sawdust particulates, optimizing stress distribution and impact resistance. Hardness was also improved, peaking at a Rockwell hardness number of 94. Thermal analysis demonstrated moderate thermal conductivity (1.92 W mK−1) and a high heat deflection temperature (109 °C), indicating excellent thermal stability. SEM provided insights into the composite's microstructure, confirming uniform sawdust distribution and robust fibre–matrix adhesion. These findings underscore the potential of this composite for lightweight, durable and thermally stable structural applications. © 2024 Society of Chemical Industry.","PeriodicalId":20404,"journal":{"name":"Polymer International","volume":null,"pages":null},"PeriodicalIF":3.2,"publicationDate":"2024-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141783343","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Investigating the relationship between natural frequency and residual strength and stiffness of cross‐ply laminate under cyclic loading 研究循环荷载下交叉层压板的固有频率与残余强度和刚度之间的关系

IF 3.2 4区化学

Polymer International Pub Date : 2024-07-24 DOI: 10.1002/pi.6682

Pouya Valizadeh, Ahad Zabett, Jalil Rezaeepazhand

{"title":"Investigating the relationship between natural frequency and residual strength and stiffness of cross‐ply laminate under cyclic loading","authors":"Pouya Valizadeh, Ahad Zabett, Jalil Rezaeepazhand","doi":"10.1002/pi.6682","DOIUrl":"https://doi.org/10.1002/pi.6682","url":null,"abstract":"Predicting the fatigue life of wind turbine rotor blades is a challenging and crucial engineering task. This study investigates the correlation between modal parameters and the degradation of residual strength and tensile modulus in the cross‐ply glass epoxy laminate [0/90]7 used in wind turbine blades under fatigue loading. The tensile and vibration characteristics were assessed, followed by constant amplitude fatigue tests at 35%, 43% and 55% of the ultimate tensile strength, with R = 0.1 and a frequency of 8 Hz. The modal analysis was performed on the cycled specimens at life fractions from 0.05 to 0.70 and residual modulus and strength were obtained. The results establish a well‐defined correlation between these residual mechanical properties and the natural frequency. Normalized residual strength, tensile modulus and natural frequency demonstrated similar behaviors during the fatigue life. An initial rapid decrease in the first tenth of the life fraction was observed, followed by minimal changes up to a life fraction of 0.7. The strong correlation between the first mode natural frequency and both the residual strength and the tensile E‐modulus provides a promising basis for developing accurate fatigue life prediction models for fiber‐reinforced composite structures. © 2024 Society of Chemical Industry.","PeriodicalId":20404,"journal":{"name":"Polymer International","volume":null,"pages":null},"PeriodicalIF":3.2,"publicationDate":"2024-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141783344","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Preparation of surfactant‐assisted polycaprolactone/κ‐carrageenan nanofibres 制备表面活性剂辅助聚己内酯/κ-卡拉胶纳米纤维

IF 3.2 4区化学

Polymer International Pub Date : 2024-07-23 DOI: 10.1002/pi.6683

Vandana Kumari, Sukumar Roy, Wazed Ali, Samrat Mukhopadhyay, Bhuvanesh Gupta

{"title":"Preparation of surfactant‐assisted polycaprolactone/κ‐carrageenan nanofibres","authors":"Vandana Kumari, Sukumar Roy, Wazed Ali, Samrat Mukhopadhyay, Bhuvanesh Gupta","doi":"10.1002/pi.6683","DOIUrl":"https://doi.org/10.1002/pi.6683","url":null,"abstract":"The objective of this work was to fabricate nanofibres composed of polycaprolactone (PCL) and κ‐carrageenan (kC) by employing an anionic surfactant, sodium bis(2‐ethylhexyl) sulfosuccinate (AOT). This study examined the role of the surfactant in PCL/kC/AOT (hybrid) nanofibre preparation using SEM, AFM, Fourier transform infrared spectroscopy, XRD and DSC. The wettability and water uptake percentage of the nanofibres were investigated. An antimicrobial study was conducted against bacterial strains using a colony‐counting assay, and changes in bacterial morphology were monitored using TEM. The results demonstrated that the hybrid nanofibres had a uniform and smooth structure, which might be attributed to the improved compatibility between polymers in the presence of the surfactant. The incorporation of AOT in the matrix resulted in a reduction in the mean fibre diameter and surface roughness. The hybrid nanofibres increased water absorbency is evidence of their high hydrophilicity, which can be explained by the simultaneous impact of kC and AOT. The hybrid nanofibres exhibited effective activity against Staphylococcus aureus and Escherichia coli. © 2024 Society of Chemical Industry.","PeriodicalId":20404,"journal":{"name":"Polymer International","volume":null,"pages":null},"PeriodicalIF":3.2,"publicationDate":"2024-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141783345","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Optimization of physical and mechanical properties of PC/ABS/PMMA blends by mixture design approach 用混合物设计方法优化 PC/ABS/PMMA 混合物的物理和机械性能

IF 2.9 4区化学

Polymer International Pub Date : 2024-07-16 DOI: 10.1002/pi.6681

Rahma Ezzeddine, Karama Elfehri, Ángel Marcos-Fernández, Basma Samet

{"title":"Optimization of physical and mechanical properties of PC/ABS/PMMA blends by mixture design approach","authors":"Rahma Ezzeddine, Karama Elfehri, Ángel Marcos-Fernández, Basma Samet","doi":"10.1002/pi.6681","DOIUrl":"10.1002/pi.6681","url":null,"abstract":"This study aims to investigate the recycling of end-of-life computer plastics, focusing on polycarbonate (PC) and acrylonitrile–butadiene–styrene (ABS) copolymer, which constitute a significant portion of collected computers. Through differential scanning calorimetry and infrared spectroscopy analyses, the properties of raw PC, ABS and poly(methyl methacrylate) (PMMA) were evaluated. Various blends of PC and ABS were prepared, incorporating different percentages of recycled PMMA as a cost-effective coupling agent. These blends were processed through melt compounding using a contra-rotating twin-screw extruder and subsequently shaped by injection molding. An experimental mixture design was applied to evaluate the mechanical and physical properties of the composite materials, including melt flow index, hardness, flexural strain at break and Charpy impact strength. The results of the desirability analysis indicated that the optimal blend for achieving a balance between mechanical and physical properties consists of a high PC content (approximately 80% or more), a low ABS content (less than 20%) and less than 5% recycled PMMA. © 2024 Society of Chemical Industry.","PeriodicalId":20404,"journal":{"name":"Polymer International","volume":null,"pages":null},"PeriodicalIF":2.9,"publicationDate":"2024-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141642265","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Inorganic–organic polymer networks derived from a cyclic siloxane tetrafunctional glycidyl ether resin 环硅氧烷四官能缩水甘油醚树脂衍生的无机-有机聚合物网络

IF 2.9 4区化学

Polymer International Pub Date : 2024-07-15 DOI: 10.1002/pi.6677

Houlei Gan, Seyed Mohsen Seraji, Juan Zhang, Samuel R Swan, Rusheni Bhagya Senanayake, Russell J Varley

{"title":"Inorganic–organic polymer networks derived from a cyclic siloxane tetrafunctional glycidyl ether resin","authors":"Houlei Gan, Seyed Mohsen Seraji, Juan Zhang, Samuel R Swan, Rusheni Bhagya Senanayake, Russell J Varley","doi":"10.1002/pi.6677","DOIUrl":"10.1002/pi.6677","url":null,"abstract":"A tetrafunctional glycidyl ether cyclic siloxane epoxy resin (TGTS) has been synthesized, characterized and cured with four aromatic amine hardeners: 1,3-phenylenediamine (PDA), diethyltoluenediamine (DETDA), 4,4-diaminodiphenylmethane (DDM) and 1,3-bis(4-aminophenoxy)benzene (APB). Each of the cured networks produces transparent and homogeneous networks, although when TGTS is cured with DETDA, reduced compatibility led to lower epoxide consumption, a more heterogenous microstructure and deleterious effects upon properties. Reduced miscibility of DETDA significantly impacts the chemical structure and microstructure of the network, resulting in significant reductions in thermal and mechanical properties but higher UV-A transmission. The PDA-, APB- and DDM-cured networks conversely were more miscible and display properties typical of organic–inorganic hybrid networks, such as good mechanical properties at ambient and sub-ambient temperatures, comparatively high glass transition temperatures, improved resistance to oxidation and lower UV-A transmission. © 2024 The Author(s). Polymer International published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.","PeriodicalId":20404,"journal":{"name":"Polymer International","volume":null,"pages":null},"PeriodicalIF":2.9,"publicationDate":"2024-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/pi.6677","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141646446","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Itaconic anhydride functionalized cyanoethyl cellulose with crosslinked structure enabled improved dielectric properties 具有交联结构的衣康酸酐功能化氰乙基纤维素可改善介电性能

IF 2.9 4区化学

Polymer International Pub Date : 2024-07-15 DOI: 10.1002/pi.6680

Sen Cheng, Xinyu Wang, Rui Yang, Jiabao Wang, Chunhua Lu, Kai Guo, Ning Zhu, Xin Hu

{"title":"Itaconic anhydride functionalized cyanoethyl cellulose with crosslinked structure enabled improved dielectric properties","authors":"Sen Cheng, Xinyu Wang, Rui Yang, Jiabao Wang, Chunhua Lu, Kai Guo, Ning Zhu, Xin Hu","doi":"10.1002/pi.6680","DOIUrl":"https://doi.org/10.1002/pi.6680","url":null,"abstract":"As a type of cellulose ether, cyanoethyl cellulose (CEC) is considered to be a promising candidate for polymer dielectrics due to its sustainable nature and high dielectric constant induced by the cyano groups. However, the relatively high conduction loss of CEC arising from the charge motion across the polymer degrades its dielectric properties. In this work, we designed and synthesized an all‐organic polymer composite of CEC/itaconic anhydride (ITA) to improve dielectric properties. The CEC matrix was graft functionalized by ITA via an esterification reaction between the anhydride groups of ITA and hydroxyl groups of CEC. Meanwhile, crosslinking structure was also established in the composite by the generation of diester. Significantly improved dielectric constant (εr), elevated breakdown strength (Eb), restrained dielectric loss (tan δ) and decreased conductivity (σ) were observed in the composites compared with unmodified CEC. The εr increased from 17 for pure CEC to 32 for CEC/ITA at 1 kHz, and Eb also soared from 145 MV m−1 for CEC to 226 MV m−1 for the composite. The tan δ reduced from 0.24 for pure CEC to about 0.05 for the composite at 100 Hz. This should be attributed to the molecule trapping centers arising from the high electron affinity ITA and the formation of crosslinked networks as well as hydrogen bonding, which impeded the electric conduction. It also provided additional advantages of better dielectric properties for the CEC/ITA composites than pure CEC at high temperatures, which may offer inspiration for the design and preparation of bio‐based dielectrics for high temperatures. © 2024 Society of Chemical Industry.","PeriodicalId":20404,"journal":{"name":"Polymer International","volume":null,"pages":null},"PeriodicalIF":2.9,"publicationDate":"2024-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141645135","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Development of a freshness indicator packaging system using cold atmospheric plasma on LLDPE–PVA with Laponite–anthocyanin biohybrid 在含有皂石-花青素生物杂化物的 LLDPE-PVA 上使用冷大气等离子体开发新鲜度指示器包装系统

IF 2.9 4区化学

Polymer International Pub Date : 2024-07-14 DOI: 10.1002/pi.6679

Gabriel Coelho Leandro, Denise Adamoli Laroque, Bruno Augusto Mattar Carciofi, Germán Ayala Valencia

{"title":"Development of a freshness indicator packaging system using cold atmospheric plasma on LLDPE–PVA with Laponite–anthocyanin biohybrid","authors":"Gabriel Coelho Leandro, Denise Adamoli Laroque, Bruno Augusto Mattar Carciofi, Germán Ayala Valencia","doi":"10.1002/pi.6679","DOIUrl":"10.1002/pi.6679","url":null,"abstract":"This study developed a freshness indicator based on poly(vinyl alcohol) (PVA) and a biohybrid (BH) of Laponite® and anthocyanins adhered to linear low-density polyethylene (LLDPE) using cold atmospheric plasma (CAP). LLDPE was treated with CAP for 0 to 300 s, which resulted in an increased surface energy, characterized by an important increase in its polar component up to 120 s of treatment, due to the formation of polar groups on the surface of LLDPE. No changes in mechanical properties and water vapor permeability of LLDPE were observed. LLDPE–PVA–BH films were more homogeneous if BH was added before the acidification of the film-forming solution due to more negative zeta potential and lower particle size of BH in basic medium. Indicators made with BH were able to maintain color after 8 weeks of exposure to light, while those made with anthocyanin extract had fully degraded after 3 weeks. The freshness indicator's color changed from purple to blue and finally to green when exposed to ammonia hydroxide (30% NH3) and from purple to blue when exposed to a simulant liquid of spoiled meat (0.03% NH3). Similar color variance was observed when the indicator was applied to monitor shrimp freshness, changing from purple to blue when the shrimp pH reached pH 7.6. Thus, bilayer films of LLDPE–PVA and natural BH produced using CAP have potential food packaging applications. © 2024 Society of Chemical Industry.","PeriodicalId":20404,"journal":{"name":"Polymer International","volume":null,"pages":null},"PeriodicalIF":2.9,"publicationDate":"2024-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141649656","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0