Macromolecular Symposia最新文献_第10页

Heavy Metal Contamination in Plants: Sources, Monitoring, and Data-Driven Insights

Macromolecular Symposia Pub Date : 2025-02-17 DOI: 10.1002/masy.202400239

ArvindKumar Yadav, Mohseena Hasan, Simranjeet Kour, Ratna Chandra, VivekKumar Singh, I.M. Noor, M.Z.A. Yahya, Har Mohan Singh, Ashutosh Tripathi

{"title":"Heavy Metal Contamination in Plants: Sources, Monitoring, and Data-Driven Insights","authors":"ArvindKumar Yadav, Mohseena Hasan, Simranjeet Kour, Ratna Chandra, VivekKumar Singh, I.M. Noor, M.Z.A. Yahya, Har Mohan Singh, Ashutosh Tripathi","doi":"10.1002/masy.202400239","DOIUrl":"https://doi.org/10.1002/masy.202400239","url":null,"abstract":"The present study explores the impact of heavy metals on plant physiology and development, emphasizing sources, tracking methods, and health effects. It provides a comprehensive understanding and proposes strategies to mitigate these negative impacts. Advanced data analytics are used to track metal movement and concentration in plant species and environmental conditions. Heavy metals like cadmium, lead, and mercury disrupt plant growth, photosynthesis, and nutrient uptake, thereby reducing plant vitality and productivity. Data tracking reveals specific accumulation hotspots and adaptive mechanisms plants use to mitigate toxic effects. Effective tracking and data analytics are essential for understanding the extent of metal pollution. The study highlights the need for integrated approaches, such as phytoremediation, soil amendments, and regulatory measures, to address heavy metal stress. Future research should focus on developing more efficient tracking technologies and exploring genetic engineering solutions.","PeriodicalId":18107,"journal":{"name":"Macromolecular Symposia","volume":"414 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143431409","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}

引用次数: 0

Synthesis and Characterization of PEMA-CNT-Based Polymer Electrolyte Nanocomposite and Its Application in DSSC

Macromolecular Symposia Pub Date : 2025-02-17 DOI: 10.1002/masy.202400190

Palvinder Singh, Amit Sachdeva, Shruti Singh, M. Z. A. Yahya, Nor Mas Mira Abd Rahman, Cherry Bhargava

{"title":"Synthesis and Characterization of PEMA-CNT-Based Polymer Electrolyte Nanocomposite and Its Application in DSSC","authors":"Palvinder Singh, Amit Sachdeva, Shruti Singh, M. Z. A. Yahya, Nor Mas Mira Abd Rahman, Cherry Bhargava","doi":"10.1002/masy.202400190","DOIUrl":"https://doi.org/10.1002/masy.202400190","url":null,"abstract":"The conductivity and structural properties of poly(ethyl methacrylate) (PEMA)-based plasticized electrolytes are modified by adding carbon nanotubes (CNT) as nanoparticle. The PEMA + KI (40% wt) and EC (60% wt) have maximum conductivity of 4.65×10−5 S/cm using solution casting technique. CNT is dissolved into this maximum conducting sample. On addition of 9% wt of CNT, we obtained maximum ionic conductivity of 3.5×10−4 S/cm. The morphology of the conductive sample is investigated using SEM technique, amorphicity is studied by FTIR technique, and a comparison of crystalline structure between maximum conducting samples of PEMA + KI + EC and PEMA + KI + EC + CNT is done by XRD technique to identify polymer composite's amorphous nature. DSSC is prepared using doctor blade method using maximum conducting sample, and it is observed that energy conversion efficiency is 2.27% at 1 sun condition with open circuit voltage of 0.6887 V, short circuit current density 3.88 A/cm2, and fill factor 81.11%.","PeriodicalId":18107,"journal":{"name":"Macromolecular Symposia","volume":"414 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143431512","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}

引用次数: 0

Epoxy and Fused Silica Composite for Radio Frequency and Microwave Applications

Macromolecular Symposia Pub Date : 2025-02-17 DOI: 10.1002/masy.202400200

Surendra Kumar, Pallavi Gupta, Manisha Rajauriya

引用次数: 0

Environmentally Friendly Processes for the Production of Silver Nanoparticles

Macromolecular Symposia Pub Date : 2025-02-17 DOI: 10.1002/masy.202400154

Nidhi Jain, Kartik Dani, Sahil Chaskar, I. M. Noor, M. Z. A. Yahya, Aditya Koul, Revannath Khatkepatil

引用次数: 0

Synthesis and In Silico Study of Silver Nanoparticles Composite with Novel Schiff Base

Macromolecular Symposia Pub Date : 2025-02-17 DOI: 10.1002/masy.202400234

Nuaman F. Alheety, Hanan Altaif Yassin, Ahmed J. Karakosh, Bilal J. M. Aldahham, Samer H. Ali, Khalid Dfeek Ahmed, Bilal A. Dylan, Huda A. Nuaman, Mustafa A. Alheety

引用次数: 0

Pectin Edible Film Obtained from Orange Peel: Characterization and Application to Improve the Quality of Minimally Processed Apples 从橘子皮中提取果胶可食性薄膜：表征及其在提高低加工苹果品质中的应用

Macromolecular Symposia Pub Date : 2024-12-16 DOI: 10.1002/masy.202400088

Monique A. P. Cotrim, Marina R. F. de Ferraz, Eliane Ayres

{"title":"Pectin Edible Film Obtained from Orange Peel: Characterization and Application to Improve the Quality of Minimally Processed Apples","authors":"Monique A. P. Cotrim, Marina R. F. de Ferraz, Eliane Ayres","doi":"10.1002/masy.202400088","DOIUrl":"https://doi.org/10.1002/masy.202400088","url":null,"abstract":"Brazil is the leading orange juice producer worldwide. Only about 50% of an orange is juice, so an enormous amount of waste is generated annually. In this context, studies involving alternatives for repurposing the remaining 50%, so it is not wasted or sent to landfill, are an issue of responsibility. In the present work, pectin is extracted to obtain a film-forming solution (FFS). The extracted pectin is classified as high ester pectin since its degree of esterification (%DE) is higher than 50%. The FFS gives rise to transparent films with a low yellowing index. The addition of CaCl2 produces a crosslinked film with a 35% and 50% percentage increase in the contact angle and tensile strength, respectively. A FFS is proposed to be used without and with CaCl2 as edible packaging material. Herein, it is applied as an edible coating (EC), directly onto the peeled apple slices, or as an edible wrapping film. Both strategies aim to delay the browning of apples, evaluated by the browning index (BI). This result is important for the marketing of fresh-cut fruits since the acceptance by consumers is strongly influenced by visual aspects.","PeriodicalId":18107,"journal":{"name":"Macromolecular Symposia","volume":"413 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142851497","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}

引用次数: 0

Grinding of CF-Reinforced Thermoplastic and Thermoset Composites: Is There Contamination in the Process? cf增强热塑性和热固性复合材料的磨削：在加工过程中是否有污染？

Macromolecular Symposia Pub Date : 2024-12-16 DOI: 10.1002/masy.202400095

Larissa Stieven Montagna, Maikon Stefano dos Santos, Thais Ferreira da Silva, Thaís Larissa do Amaral Montanheiro, Juliano Marini, Mirabel Cerqueira Rezende, Fabio Roberto Passador

{"title":"Grinding of CF-Reinforced Thermoplastic and Thermoset Composites: Is There Contamination in the Process?","authors":"Larissa Stieven Montagna, Maikon Stefano dos Santos, Thais Ferreira da Silva, Thaís Larissa do Amaral Montanheiro, Juliano Marini, Mirabel Cerqueira Rezende, Fabio Roberto Passador","doi":"10.1002/masy.202400095","DOIUrl":"https://doi.org/10.1002/masy.202400095","url":null,"abstract":"The growing demand for carbon fiber-reinforced thermoplastic and thermoset (CFRT) composites, mainly in the aerospace, automotive, and energy industries, is due to obtaining lighter components. However, the amount of waste generated during the CFRT production process and at the end of its useful life has been increasing sharply, urgently requiring viable solutions that create less environmental impact in its final disposal. The mechanical recycling process has been presented as an economically and environmentally viable alternative to minimize the environmental impacts generated by the accumulation of this waste in the environment. Therefore, in this study, possible contaminations arising from the grinding process of waste composites reinforced with carbon fiber (CF) based on thermoplastics, polyamide 6 (CF/PA6), low melting poly (aryl ether ketone) (CF/PAEK), poly (phenylene sulfide) (CF/PPS), and fast-curing epoxy thermoset, are investigated. The composites are ground in a knife mill, resulting in materials measuring (2.6 ± 1) mm. Through differential scanning calorimetry (DSC) analysis, it is observed that the thermal profile of the ground composites is not changed; only the CF/PA6 composite shows an increase of 10% in the value of the degree of crystallinity. X-ray diffraction (XRD) and scanning electron microscopy (SEM) equipped with an energy-dispersive X-ray spectrometer show no metallic contamination from the grinding process. Only low levels of aluminum contamination are observed (below 2.7 wt%), attributed to the comminution step of the waste using an angle grinder adapted to cutting discs with abrasive aluminum oxide grains before the grounding process in the knife mill.","PeriodicalId":18107,"journal":{"name":"Macromolecular Symposia","volume":"413 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142861460","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}

引用次数: 0

Sustainable Alternatives for Packaging: Exploring the Hygroscopicity of Biodegradable Materials Based on PLA, PBAT, and Rice Husk 包装的可持续替代品：探索基于聚乳酸，PBAT和稻壳的可生物降解材料的吸湿性

Macromolecular Symposia Pub Date : 2024-12-16 DOI: 10.1002/masy.202400094

Vanessa Zimmer Kieffer, Nicole Bohm Agostini, Ruth Marlene Campomanes Santana

{"title":"Sustainable Alternatives for Packaging: Exploring the Hygroscopicity of Biodegradable Materials Based on PLA, PBAT, and Rice Husk","authors":"Vanessa Zimmer Kieffer, Nicole Bohm Agostini, Ruth Marlene Campomanes Santana","doi":"10.1002/masy.202400094","DOIUrl":"https://doi.org/10.1002/masy.202400094","url":null,"abstract":"This study explores the potential of sustainable materials by combining biodegradable polymers with agro-industrial waste. It aims to offer alternatives to mitigate the adverse environmental impacts of single-use food packaging. The aim is to evaluate the potential of a composite material made from a polylactic acid (PLA)/polybutylene adipate-co-terephthalate (PBAT) blend, reinforced with rice husk (RH), as a viable alternative for food packaging. Two blends containing 10–20 wt% of PBAT (BL1 and BL2) and four composites with 10–20 wt% of RH reinforcement (CO1, CO2, CO3, and CO4) are tested to determine the most suitable formulation in terms of barrier properties. The samples are characterized using Fourier-Transform Infrared Spectroscopy (FTIR), contact angle measurements, Scanning Electron Microscopy (SEM), water absorption, and moisture absorption test. FTIR and SEM analyses reveal partial immiscibility between PLA and PBAT in blends BL1 and BL2. In the SEM analyses, composites CO1 and CO3 (10 wt% RH) exhibit better RH dispersion, resulting in lower water absorption and higher moisture barrier properties. However, the hydrophilic nature of RH indicates the need to improve the interaction at the fiber–matrix interface to optimize performance. Additional studies are ongoing to evaluate additional properties and feasibility for large-scale production, aiming at sustainable industrial applications.","PeriodicalId":18107,"journal":{"name":"Macromolecular Symposia","volume":"413 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142861463","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}

引用次数: 0

An Easy Synthesis of Polyaniline Through Bacterial Nanocellulose Membranes Obtained from Kombucha Tea Fermentation 康普茶发酵所得细菌纳米纤维素膜制备聚苯胺的研究

Macromolecular Symposia Pub Date : 2024-12-16 DOI: 10.1002/masy.202400069

Karoline Gwiazdecki, Ermelinda Junkes, Marcia M. Meier, Andrea L. S. Shneider, Carla Dalmolin

{"title":"An Easy Synthesis of Polyaniline Through Bacterial Nanocellulose Membranes Obtained from Kombucha Tea Fermentation","authors":"Karoline Gwiazdecki, Ermelinda Junkes, Marcia M. Meier, Andrea L. S. Shneider, Carla Dalmolin","doi":"10.1002/masy.202400069","DOIUrl":"https://doi.org/10.1002/masy.202400069","url":null,"abstract":"Composites with polyaniline (Pani) in cellulosic matrices have been studied as Pani electrodes in many applications, but the presence of an insulating network causes a reduction in conductivity, and the electrochemical properties of the composites are difficult evaluate. This work, propose an easy synthesis of Pani into a membrane of bacterial nanocellulose produced from Kombucha tea fermentation by using the well-known aniline interfacial polymerization. To promote the polymer formation through all the large surface area of the three-dimensional (3D) membrane, the monomer and an oxidant are forced to penetrate the cellulosic matrix by vacuum filtration using different methodologies. Optical and scanning electron microscopies (SEMs) show that Pani is deposited even on the inner surface of the bacterial nanocellulose membrane, and cyclic voltammetry (CV) shows that the redox properties of Pani are maintained. Finally, higher current peaks are used to propose an easy methodology to produce Pani/bacterial nanocellulose electrodes with better electrochemical activity.","PeriodicalId":18107,"journal":{"name":"Macromolecular Symposia","volume":"413 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142851476","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}

引用次数: 0

The Role of Aniline Adsorption on Carbon Fiber Before Plasma Treatment for Polyaniline Deposition 等离子体处理聚苯胺沉积前，碳纤维对苯胺的吸附作用

Macromolecular Symposia Pub Date : 2024-12-16 DOI: 10.1002/masy.202400070

Wilma S. Medeiros, André F. D. Borges, Luiz C. Fontana, Carla Dalmolin

{"title":"The Role of Aniline Adsorption on Carbon Fiber Before Plasma Treatment for Polyaniline Deposition","authors":"Wilma S. Medeiros, André F. D. Borges, Luiz C. Fontana, Carla Dalmolin","doi":"10.1002/masy.202400070","DOIUrl":"https://doi.org/10.1002/masy.202400070","url":null,"abstract":"Polyaniline (Pani) is widely studied for power sources due to its easy synthesis, good chemical and thermal stabilities, high electrical conductivity and reversive oxidation/reduction processes. However, the interaction between Pani and the carbon substrate used as a current collector interferes with the efficiency of the final electrode. So, the present work aims at evaluating the effect of plasma functionalization of textile carbon fibers (CFs) with the intention of promoting conjugated covalent bonds between the substrate and the polymer chain, intensifying their interaction and electron transfer. The applied methodology is based on exposing CF to Ar/N2 plasma to promote reactive groups on the surface and to create anchors to the growth of the polymer chain in the following interfacial synthesis of Pani. For comparison purposes, Pani electrodes are produced using CF with no treatment and CF with previously adsorbed aniline. The morphological characterization through scanning electron microscopy (SEM), allied with X-ray photoelectron spectroscopy (XPS), shows modifications in the fiber rugosity and the insertion of polar and N-functional groups on the surface. Finally, the electrochemical properties of the electrode are evaluated through cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). The results show a lower impedance, a higher peak, and higher capacitive currents for the electrodes whose CF are treated by Ar/N2 when compared with electrodes with untreated CF or with adsorbed aniline.","PeriodicalId":18107,"journal":{"name":"Macromolecular Symposia","volume":"413 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142851477","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}

引用次数: 0