Iranian Polymer Journal最新文献_第10页

Effect of vinyl acetate/dibutyl maleate copolymers on gas transport properties of poly(ethylene oxide-b-amide 6) membranes: a comprehensive study on permeability, diffusivity, solubility, and permselectivity of carbon dioxide 醋酸乙烯酯/马来酸二丁酯共聚物对聚（环氧乙烷-b-酰胺 6）膜气体传输特性的影响：关于二氧化碳渗透性、扩散性、溶解性和过选择性的综合研究

IF 2.4 3区化学

Iranian Polymer Journal Pub Date : 2024-03-14 DOI: 10.1007/s13726-024-01290-0

Marzieh Shirinia, Mahdi Abdollahi, Mohammadreza Omidkhah

{"title":"Effect of vinyl acetate/dibutyl maleate copolymers on gas transport properties of poly(ethylene oxide-b-amide 6) membranes: a comprehensive study on permeability, diffusivity, solubility, and permselectivity of carbon dioxide","authors":"Marzieh Shirinia, Mahdi Abdollahi, Mohammadreza Omidkhah","doi":"10.1007/s13726-024-01290-0","DOIUrl":"10.1007/s13726-024-01290-0","url":null,"abstract":"<div><p>Poly(ethylene oxide-<i>b</i>-amide 6) (PEBAX<sup>®</sup> 1657) blend membranes containing 10, 30, and 50% (by weights) of dense and rubbery vinyl acetate/dibutyl maleate (VAc/DBM) copolymers with different chemical compositions as CO<sub>2</sub>-philic additives were made by solution casting method and were studied for the separation of CO<sub>2</sub>/CH<sub>4</sub> and CO<sub>2</sub>/N<sub>2</sub> gas systems. Chemical interaction, thermal properties, and morphology of the membranes were investigated using FTIR, DSC, and FE-SEM analyses, respectively. The solubility coefficient of carbon dioxide as well as the solubility selectivity showed an upward trend with the addition of vinyl acetate-based copolymers, especially at 50% (by weight). In the membranes containing 10 and 30% (by weights) of vinyl acetate-based copolymers, both key factors of solubility and diffusion coefficient had an almost appropriate trend, which improved the performance of the blend membranes compared to pure Pebax 1657. In the membranes containing 50% (by weight) additive, the diffusion and diffusion selectivity decreased due to the change of the dominant phase from polyethylene oxide to vinyl acetate-based copolymers, resulting in the reduction of the permeability. By increasing of the pressure, the permeability of carbon dioxide was increased which can be attributed to the increase in the solubility of carbon dioxide and then to the rubbery and resistance properties of the added copolymers against pressure. Compared to a pure Pebax 1657, gas separation performance of the blend membranes containing 10 and 30% (by weights) of vinyl acetate-based copolymers were closer to Robeson’s curve, confirming the improvement of permeability properties in these membranes.</p><h3>Graphical abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":601,"journal":{"name":"Iranian Polymer Journal","volume":"33 6","pages":"799 - 814"},"PeriodicalIF":2.4,"publicationDate":"2024-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140128377","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

L-Lactide ring-opening polymerization: a multi-objective optimization approach through mathematical modeling L-内酰胺开环聚合：通过数学建模的多目标优化方法

IF 2.4 3区化学

Iranian Polymer Journal Pub Date : 2024-03-14 DOI: 10.1007/s13726-024-01291-z

Geetu P. Paul, Virivinti Nagajyothi

{"title":"L-Lactide ring-opening polymerization: a multi-objective optimization approach through mathematical modeling","authors":"Geetu P. Paul, Virivinti Nagajyothi","doi":"10.1007/s13726-024-01291-z","DOIUrl":"10.1007/s13726-024-01291-z","url":null,"abstract":"<div><p>As industries move towards sustainable product development, biopolymers such as polylactide are gaining significant attention owing to their self-degradability and eco-friendliness. Therefore, a multi-objective optimization problem (MOOP) formulation to obtain high-performance polylactide concerning physicochemical properties is designed through mathematical modeling and solved using the Elitist Non-dominated Sorting Genetic Algorithm (NSGA II). The current work is focused on improving the polymer growth mechanisms with stannous octoate (catalyst) and 1-dodecanol (co-catalyst) by analyzing three different case studies using optimization approach. In the first study, the Pareto front for batch <i>L</i>-lactide ring-opening polymerization (L-ROP) with objective functions of average molecular weight, polydispersity index, and time is obtained. Further investigations on esterification, chain propagation and the ratio of monomer–catalyst and cocatalyst–catalyst is carried out. The optimized result using certain range of initial reagent concentrations is determined and one of the suitable Pareto optimal solution for case study 1 gives <i>M</i><sub>w</sub> = 610 kDa, PDI = 1.8, time = 100 s; case study 2 is <i>M</i><sub>w</sub> = 560 kDa, λ1/λ0 = 4300, λ0 = 70; case study 3 is <i>M</i><sub>w</sub> = 500 kDa, <i>M</i>/<i>C</i> = 33,800, ROH/C = 8.5. The neighboring optimal solutions in the Pareto front have been classified into 3 groups and the corresponding process parameters for the particular outcome are tabulated. Process modeling and optimization in close vicinity with appropriate experimental data are distinct aspects of this work to apply in industrial plant level.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":601,"journal":{"name":"Iranian Polymer Journal","volume":"33 6","pages":"815 - 826"},"PeriodicalIF":2.4,"publicationDate":"2024-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140127979","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Constraints on industrial-scale application of lignocellulosic fiber and biomass in food packaging 木质纤维素纤维和生物质在食品包装中工业化应用的制约因素

IF 2.4 3区化学

Iranian Polymer Journal Pub Date : 2024-03-12 DOI: 10.1007/s13726-024-01288-8

Sanchita Biswas Murmu, Laxmi Kanta Nayak, Ammayappan Lakhmanan, Haokhothang Baite, Dipak Nayak, Boris Huirem

{"title":"Constraints on industrial-scale application of lignocellulosic fiber and biomass in food packaging","authors":"Sanchita Biswas Murmu, Laxmi Kanta Nayak, Ammayappan Lakhmanan, Haokhothang Baite, Dipak Nayak, Boris Huirem","doi":"10.1007/s13726-024-01288-8","DOIUrl":"10.1007/s13726-024-01288-8","url":null,"abstract":"<div><p>Most of the food-packaging materials are made from single-use plastics from petroleum sources, depleting the environment and adding to waste management issues. Natural fiber is a renewable, biodegradable alternative that has immense potential to be used as a food-packaging material. This review aims at reporting the strengths, limitations, and engineering considerations of the use of lignocellulosic biomass in the form of bags, paper, and particleboard for food-packaging applications. The limitations in the present application of jute bag for different grain storage and the technical interventions adapted are being explored to improve them. The recent reports about the use of lignocellulosic fiber pulp in functional paper development in targeting food packaging as the end application and further enhancement of the engineering parameters by reinforcement with nanofiber, nanocellulose, nano-hemicelluloses, and other lignocellulosic fiber components have been scrutinized. The additional functional characteristics added to conventional paper packaging due to the presence of lignin and hemicellulose are highlighted. The mechanical, swelling, and other properties of lignocellulosic particleboard, such as jute sticks, wood sticks, sugarcane bagasse, and others, with the aim of their application in the construction of rigid boxes or chests for fruit and vegetable transport in the increasing scenario of e-commerce are discussed. Challenges for the system of large-scale technological adaptation are analyzed, and the scope of future research is suggested.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":601,"journal":{"name":"Iranian Polymer Journal","volume":"33 6","pages":"855 - 875"},"PeriodicalIF":2.4,"publicationDate":"2024-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140128062","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Sandwich composites from recycled plastic reinforced with krajood (Lepironia articulata) fiber for building applications 用再生塑料和 krajood（Lepironia articulata）纤维增强的建筑用三明治复合材料

IF 2.4 3区化学

Iranian Polymer Journal Pub Date : 2024-03-11 DOI: 10.1007/s13726-024-01292-y

Chatree Homkhiew, Chainarong Srivabut, Worapong Boonchouytan, Surasit Rawangwong

{"title":"Sandwich composites from recycled plastic reinforced with krajood (Lepironia articulata) fiber for building applications","authors":"Chatree Homkhiew, Chainarong Srivabut, Worapong Boonchouytan, Surasit Rawangwong","doi":"10.1007/s13726-024-01292-y","DOIUrl":"10.1007/s13726-024-01292-y","url":null,"abstract":"<p>This research aimed to showcase an economical and environmentally friendly approach to producing sandwich-structured composites from recycled plastics and krajood waste. The effects of the contents and particle sizes on mechanical and physical properties, including thermal conductivity and sound absorption coefficient, were investigated. The experimental results were analyzed using Analysis of Variance (ANOVA). The results confirmed that the isocyanate glue at 25% (by weight) and krajood fiber at 75% (by weight) at 40 mesh enhanced the flexural, compressive, and screw withdrawal properties the most. The increase in krajood fiber contents ranged from 75 to 85% (by weight) and increased the water absorption percentages. Core layer samples with high conductivity at 0.085 W/mK are considered suitable for building insulation applications, whereas sandwich composites at 0.189 W/mK are used for outdoor materials. In addition, the sound absorption coefficient and noise reduction coefficient were used to evaluate the application efficiency of sandwich-structured composite materials. The highest sound absorption coefficient and noise reduction coefficient were found using a sound frequency of 1000 Hz. The highest noise reduction coefficient value of 0.78 was found in the core layer sample, meaning that the sample absorbs 78% of sound and reflects the remaining 22% of sound waves back into a room. Thus, the outcomes of this study offer recommendations for the manufacture of sandwich composite materials from recycled polypropylene reinforced with krajood fiber in applications for construction and building products.</p>","PeriodicalId":601,"journal":{"name":"Iranian Polymer Journal","volume":"33 6","pages":"839 - 853"},"PeriodicalIF":2.4,"publicationDate":"2024-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140098258","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Non-isocyanate epoxy vinyl ester urethane prepolymer based on diglycidyl ether of bisphenol-A 基于双酚 A 二缩水甘油醚的非异氰酸酯环氧乙烯基酯聚氨酯预聚物

IF 2.4 3区化学

Iranian Polymer Journal Pub Date : 2024-03-10 DOI: 10.1007/s13726-024-01289-7

Soheila Ghasemi, Milad Ghezelsofloo, Mahsa Naeimi, Bahman Tamami, Hamed Allahyari

{"title":"Non-isocyanate epoxy vinyl ester urethane prepolymer based on diglycidyl ether of bisphenol-A","authors":"Soheila Ghasemi, Milad Ghezelsofloo, Mahsa Naeimi, Bahman Tamami, Hamed Allahyari","doi":"10.1007/s13726-024-01289-7","DOIUrl":"10.1007/s13726-024-01289-7","url":null,"abstract":"<div><p>Vinyl ester resins (VERs) are one of the main categories of polymeric matrices for fabrication of high-performance commercial composites. They have more desirable properties compared with unsaturated polyester resins. Inserting urethane functional groups in the structure of VERs and producing urethane vinyl ester resin (UVER) improve its impact and chemical resistance, enlongation and toughness. The use of isocyanate as the primary resource in urethane preparation, which is derived from phosgene toxic material, may be associated with environmental hazards; as a result, non-isocyanate polyurethane (NIPU) methods have been developed. Herein, we have described the preparation and characterization of UVER by isocyanate-free system. First, cyclic carbonates of epoxides, 2-hydroxy-3-(4-(oxiran-2-ylmethoxy)butoxy)propyl methacrylate (HOMBPM) and diglycidyl ether of bisphenol-A epoxy resin (DGEBA) were synthesized by treatment of the corresponding epoxides with atmospheric pressure of carbon dioxide and tetrabutylammonium bromide (TBAB) as a catalyst. Then, the as-prepared cyclic carbonates were reacted with ethylenediamine in the presence of different catalysts to produce non-isocyanate epoxy vinyl ester urethane prepolymer. UVER is a potential compound for curing with VERs and fabricating materials with superior mechanical features such as elongation and tensile strength in comparison to VERs. Characterization techniques such as FTIR, <sup>1</sup>H and <sup>13</sup>C NMR spectroscopy and titration methods for measurements of epoxy equivalent weight (EEW), acid number and amine value are used in the synthesis of the desired compounds.</p><h3>Graphical Abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":601,"journal":{"name":"Iranian Polymer Journal","volume":"33 6","pages":"757 - 772"},"PeriodicalIF":2.4,"publicationDate":"2024-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140098264","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Production of environmentally benign poly(hydroxybutyrate)/silver bionanocomposites reinforced with ZnO for active packaging of bread 生产无害环境的聚羟丁酸/银仿生复合材料，并用氧化锌增强，用于面包的活性包装

IF 2.4 3区化学

Iranian Polymer Journal Pub Date : 2024-03-08 DOI: 10.1007/s13726-024-01294-w

Mahak Mittal, Simran Ahuja, Anita Yadav, Sanjiv Arora, Neeraj K. Aggarwal

{"title":"Production of environmentally benign poly(hydroxybutyrate)/silver bionanocomposites reinforced with ZnO for active packaging of bread","authors":"Mahak Mittal, Simran Ahuja, Anita Yadav, Sanjiv Arora, Neeraj K. Aggarwal","doi":"10.1007/s13726-024-01294-w","DOIUrl":"10.1007/s13726-024-01294-w","url":null,"abstract":"<div><p>The aim of the present work was to prepare poly(hydroxybutyrate) (PHB)-based active food packaging film with antimicrobial potential. For the sake of developing such film, PHB silver nanocomposites (PHB/Ag) were synthesized biologically using rice-washed water as substrate for <i>Cupriavidus necator</i>. These nanocomposites were further incorporated with varying concentrations of zinc oxide (ZnO) nanoparticles (1, 2, 3 and 4%), and thin films were obtained by solvent casting. Their morphological, thermal, mechanical, water barrier and antimicrobial properties were examined by scanning electron microscopy (SEM), thermogravimetric analysis (TGA), tensile testing, water vapor permeability (WVP), and agar well diffusion assay, respectively. After the overall analysis, PHB/Ag-ZnO at 3% was designated as the optimized film. This film showed remarkable antimicrobial potential against tested food-borne pathogens i.e., <i>Escherichia coli</i> (<i>E. coli,</i> Gram-negative bacterium), <i>Staphylococcus aureus</i> (<i>S. aureus</i>, Gram-positive bacterium)<i>,</i> and <i>Aspergillus niger</i> (<i>A. niger,</i> fungal strain). With this context, the above-selected film was used to check the shelf-life of a bread sample for 10 days of storage. The findings of the study evidenced that PHB/Ag-ZnO 3% extended the shelf-life of packaged bread up to 5–8 days. Thus, the present research work demonstrates that our prepared film has prolonged the shelf-life of packaged food and carries significant potential for active food packaging.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":601,"journal":{"name":"Iranian Polymer Journal","volume":"33 6","pages":"787 - 798"},"PeriodicalIF":2.4,"publicationDate":"2024-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140076491","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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 thickness of patterned polyethylene layers by changing the line speed and temperature in the embossing machine 通过改变压花机的生产线速度和温度来研究图案聚乙烯层的厚度

IF 2.4 3区化学

Iranian Polymer Journal Pub Date : 2024-03-04 DOI: 10.1007/s13726-024-01293-x

Ekrem Altuncu, Nilay Tuccar Kilic

{"title":"Investigating the thickness of patterned polyethylene layers by changing the line speed and temperature in the embossing machine","authors":"Ekrem Altuncu, Nilay Tuccar Kilic","doi":"10.1007/s13726-024-01293-x","DOIUrl":"10.1007/s13726-024-01293-x","url":null,"abstract":"<p>Patterned polyethylene films are mandatory products in the rubber tire industry. They are used as protective lining to prevent contamination of the rubber. This pattern geometry (2D and 3D) prevents the rubber from sticking to each other. The film is desired to be homogeneous, precise in thickness, and have sufficient mechanical strength. The speed and the temperature of the pattern-forming machine are among the factors that determine this relationship between the thickness of the film and its mechanical properties for sustainable quality production. In this study, the effect of the speed and the temperature of the pattern machine on the pattern thickness during the creation of the pyramid-shaped pattern applied on a 100 ± 5 µm thick polyethylene film were examined. Four different machine speeds (24, 26, 28, and 30 m/min) and three different temperatures (100, 110, and 120 °C) were studied as variables. The impact of parameters on film thicknesses and tensile properties was assessed. Film thickness varied from ~ 375 to ~ 340 µm at higher machine speed, strength-at-break values decreased from 28 to 22 MPa, and elongation values dropped from 575 to 437% with the increment in speed. On the other hand, at higher temperatures, thickness rose from ~ 360 to ~ 390 µm, and elongation values reduced from 440 to 410%. Within the scope of the experimental studies, it was observed that the film thickness changes and the mechanical properties can be controlled by changing the line speed or process temperature.</p>","PeriodicalId":601,"journal":{"name":"Iranian Polymer Journal","volume":"33 7","pages":"891 - 899"},"PeriodicalIF":2.4,"publicationDate":"2024-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s13726-024-01293-x.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140034693","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Preparation and characterization of durable flame retardant cotton fabrics using phosphorylation reaction of cellulose with ammonium etidronate 利用纤维素与依替膦酸铵的磷化反应制备耐用阻燃棉织物并确定其特性

IF 2.4 3区化学

Iranian Polymer Journal Pub Date : 2024-03-02 DOI: 10.1007/s13726-024-01287-9

Won-Guk Choe, Wi-Phyong Kung, Yong-Man Jang, Pom Choe, Chung-Guk Choe, Chol-Jun Yu

{"title":"Preparation and characterization of durable flame retardant cotton fabrics using phosphorylation reaction of cellulose with ammonium etidronate","authors":"Won-Guk Choe, Wi-Phyong Kung, Yong-Man Jang, Pom Choe, Chung-Guk Choe, Chol-Jun Yu","doi":"10.1007/s13726-024-01287-9","DOIUrl":"10.1007/s13726-024-01287-9","url":null,"abstract":"<div><p>Developing an effective flame retardant for cotton is urgently needed to minimize the life and property loss caused by fire hazard. Here, diphosphonate system flame retardant, the ammonium salt of 1-hydroxyethylidene-1,1-diphosphonic acid (AHEDPA) is obtained by reacting urea with etidronic acid (or HEDPA), which is newly synthesized from acetic acid, phosphorus oxychloride and phosphorous acid. We predicted the suitable conditions of phosphorylation reaction for enhancing grafting rate of AHEDPA on cotton fibers, and revealed the mechanism of reaction using dicyandiamide as an accelerant. Through the Fourier transform infrared spectra and scanning electron microscopy analysis, it was found that AHEDPA with P = O(ONH<sub>4</sub><sup>+</sup>)<sub>2</sub> functional groups could be combined with –OH groups of cellulose, creating the P−O−C and P−NH<sub>2</sub> bonds. Limiting oxygen index, vertical flame test and cone calorimetric measurements were carried out on the untreated and treated cotton fabric samples with AHEDPA at different concentrations, demonstrating that the flame retardant cotton fabric with excellent washing durability were successfully obtained. Through the thermogravimetric analysis, it was confirmed that the cotton fabrics treated with AHEDPA exhibited a promotion of dehydration in cellulose and thus an increase of char formation rate, thereby protecting the substrate (cotton) from heat and fuel. The newly proposed method could enhance the grafting rate of cotton and remarkably improved the flame retardancy and durability of cotton fabrics, highlighting a wide prospect in production of flame retardant clothes.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><img></picture></div></div></figure></div></div>","PeriodicalId":601,"journal":{"name":"Iranian Polymer Journal","volume":"33 7","pages":"927 - 942"},"PeriodicalIF":2.4,"publicationDate":"2024-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140018031","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Enhancing the thermal and crystallization properties of polypropylene through carbon nanotube integration: a comprehensive investigation 通过碳纳米管集成增强聚丙烯的热性能和结晶性能：一项综合研究

IF 2.4 3区化学

Iranian Polymer Journal Pub Date : 2024-03-02 DOI: 10.1007/s13726-024-01278-w

Maziyar Sabet

{"title":"Enhancing the thermal and crystallization properties of polypropylene through carbon nanotube integration: a comprehensive investigation","authors":"Maziyar Sabet","doi":"10.1007/s13726-024-01278-w","DOIUrl":"10.1007/s13726-024-01278-w","url":null,"abstract":"<div><p>The present investigation focuses on elucidating the novel impact of both carbon nanotubes (CNTs) and multi-walled carbon nanotubes (MWCNTs) on thermal behavior and crystallization kinetics of isotactic polypropylene (PP) composites. Our primary objective is to unveil the distinctive influence of these nanotubes on PP crystallization and its thermal properties, paving the way for tailored applications in high-performance materials. Incorporating CNTs led to a noteworthy elevation in crystallization temperature without significantly altering the polymer melting point. Furthermore, our findings revealed an increased critical cooling rate in correlation with higher CNT concentrations, representing a crucial parameter for nucleation effectiveness, independent of CNT load and crystallization temperature. The study demonstrated CNTs' specific role in expediting the α-phase development in PP during isothermal crystallization experiments. Additionally, the investigation into MWCNTs within PP nanocomposites highlighted a pivotal percolation threshold at 0.5% (by weight) MWCNTs. Below this threshold, enhancements in physical properties were observed without requiring a compatibilizer. Augmented interfacial area between PP and MWCNTs notably enhanced PP's thermal stability, particularly evident at elevated temperatures, with heat-treated fibers exhibiting a distinct, narrow melting peak at 170 °C. These novel discoveries significantly advance our understanding of how CNTs impact PP crystallization and underscore the development of superior PP nanocomposites endowed with heightened thermal properties, catering to targeted applications demanding superior performance.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":601,"journal":{"name":"Iranian Polymer Journal","volume":"33 6","pages":"727 - 741"},"PeriodicalIF":2.4,"publicationDate":"2024-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140018028","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Evaluation of the potential of topically applied salicylic acid-encapsulated chitosan nanoparticles to protect tomato against Fusarium wilt 评估局部施用水杨酸包裹的壳聚糖纳米粒子保护番茄免受镰刀菌枯萎病侵害的潜力

IF 2.4 3区化学

Iranian Polymer Journal Pub Date : 2024-02-29 DOI: 10.1007/s13726-024-01283-z

Arundathi Mesa, Grace Sugandha Sowjanya Mythatha, Ramesh Balli

{"title":"Evaluation of the potential of topically applied salicylic acid-encapsulated chitosan nanoparticles to protect tomato against Fusarium wilt","authors":"Arundathi Mesa, Grace Sugandha Sowjanya Mythatha, Ramesh Balli","doi":"10.1007/s13726-024-01283-z","DOIUrl":"10.1007/s13726-024-01283-z","url":null,"abstract":"<p>In recent years, there has been a growing emphasis on eco-friendly methods to protect plants from pathogens, aiming to enhance crop yields while minimizing pesticide use. In this context, we synthesized salicylic acid-encapsulated chitosan nanoparticles (SA-CNPs) and evaluated their effectiveness in safeguarding tomato plants against Fusarium wilt caused by <i>Fusarium oxysporum f. </i>sp. <i>Lycopersici</i> <i>(FOL)</i>. SA-CNPs at concentrations of 0.01%, 0.05%, 0.1%, 0.15%, and 0.2% w/v were prepared using ionic gelation and characterized through scanning electron microscopy, zeta potential, X-ray diffraction, and Fourier transform infrared spectroscopy techniques. The results revealed an average particle size ranging from 30 to 300 nm, with zeta potential values − 30 to − 53 mV, confirming exceptional stability. Encapsulation efficiency varied from 19 to 90%. In antifungal tests, 0.2% SA-CNPs exhibited 76% inhibition rate using a food poisoning technique. Topical application of SA-CNPs increased the activities of plant defence enzymes and antioxidant enzymes in tomato plants. In an in vitro study, the percent efficacy of disease control (PEDC) demonstrated that 0.1% and 0.15% SA-CNPs provided 50% and 45% efficacy, respectively, in controlling <i>FOL</i> infection in tomato plants. These findings confirm the efficacy of SA-CNPs in reducing Fusarium wilt by leveraging their antifungal properties and enhancing antioxidant and plant defence enzymes.</p>","PeriodicalId":601,"journal":{"name":"Iranian Polymer Journal","volume":"33 5","pages":"671 - 686"},"PeriodicalIF":2.4,"publicationDate":"2024-02-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140008369","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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