Pub Date : 2023-11-27DOI: 10.1515/polyeng-2023-0201
Hao-Hsuan Tsou, Jie-An Lin, Chung-Ching Huang
Predictive maintenance techniques are increasingly important in Industry 4.0; they can be applied to nonreturn valves to mitigate waste from improper replacement. To improve such predictive maintenance, this study used four nonreturn valves with different outer diameters to investigate the effects of wear on process variables and product quality under different process parameters. The results indicated that melt temperature (process parameter) had the most substantial influence on the amount of melt backflow. The process variables are the screw position at the end of the packing stage, the slope of the screw position during the packing stage, and peak pressure. The study investigated the influence of nonreturn valve wear on the entire molding process over different periods. The findings can be extended to prediction models for developing process windows and realizing the predictive maintenance of nonreturn valves in injection molding machines.
{"title":"Predictive maintenance feasibility assessment based on nonreturn valve wear of injection molding machines","authors":"Hao-Hsuan Tsou, Jie-An Lin, Chung-Ching Huang","doi":"10.1515/polyeng-2023-0201","DOIUrl":"https://doi.org/10.1515/polyeng-2023-0201","url":null,"abstract":"Predictive maintenance techniques are increasingly important in Industry 4.0; they can be applied to nonreturn valves to mitigate waste from improper replacement. To improve such predictive maintenance, this study used four nonreturn valves with different outer diameters to investigate the effects of wear on process variables and product quality under different process parameters. The results indicated that melt temperature (process parameter) had the most substantial influence on the amount of melt backflow. The process variables are the screw position at the end of the packing stage, the slope of the screw position during the packing stage, and peak pressure. The study investigated the influence of nonreturn valve wear on the entire molding process over different periods. The findings can be extended to prediction models for developing process windows and realizing the predictive maintenance of nonreturn valves in injection molding machines.","PeriodicalId":16881,"journal":{"name":"Journal of Polymer Engineering","volume":"40 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2023-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138528919","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Based on the tuna swarm optimization-based support vector machine (TSO-SVM) and the multi-objective sparrow search algorithm (MOSSA), this paper proposes a multi-objective optimization approach for injection molding of thin-walled plastic components, addressing the issues of warpage deformation and volume shrinkage that compromise molding quality. Firstly, data samples are obtained based on the Box–Behnken experimental design and computer-aided engineering (CAE) simulation. Subsequently, SVM is employed to build a predictive model between the experimental factors and quality objectives. Additionally, the TSO is applied to optimize the hyperparameters of SVM, aiming to enhance its regression performance and prediction accuracy. Finally, the MOSSA is employed for multi-objective optimization, combined with the CRITIC scoring method for decision-making, to obtain the optimal combination of process parameters. The obtained parameters are then validated through simulation in Moldflow software. After optimization, the warpage deformation is reduced to 0.5085 mm, and the volume shrinkage rate is decreased to 7.573 %, representing a significant reduction of 40.9 % and 18.1 %, respectively, compared to the pre-optimized results. The remarkable improvement demonstrates the effectiveness of the method based on TSO-SVM and MOSSA for the efficient monitoring of the injection molding process.
{"title":"Quality monitoring of injection molding based on TSO-SVM and MOSSA","authors":"Wenjie Ding, Xiying Fan, Yonghuan Guo, Xiangning Lu, Dezhao Wang, Changjing Wang, Xinran Zhang","doi":"10.1515/polyeng-2023-0168","DOIUrl":"https://doi.org/10.1515/polyeng-2023-0168","url":null,"abstract":"Based on the tuna swarm optimization-based support vector machine (TSO-SVM) and the multi-objective sparrow search algorithm (MOSSA), this paper proposes a multi-objective optimization approach for injection molding of thin-walled plastic components, addressing the issues of warpage deformation and volume shrinkage that compromise molding quality. Firstly, data samples are obtained based on the Box–Behnken experimental design and computer-aided engineering (CAE) simulation. Subsequently, SVM is employed to build a predictive model between the experimental factors and quality objectives. Additionally, the TSO is applied to optimize the hyperparameters of SVM, aiming to enhance its regression performance and prediction accuracy. Finally, the MOSSA is employed for multi-objective optimization, combined with the CRITIC scoring method for decision-making, to obtain the optimal combination of process parameters. The obtained parameters are then validated through simulation in Moldflow software. After optimization, the warpage deformation is reduced to 0.5085 mm, and the volume shrinkage rate is decreased to 7.573 %, representing a significant reduction of 40.9 % and 18.1 %, respectively, compared to the pre-optimized results. The remarkable improvement demonstrates the effectiveness of the method based on TSO-SVM and MOSSA for the efficient monitoring of the injection molding process.","PeriodicalId":16881,"journal":{"name":"Journal of Polymer Engineering","volume":"31 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2023-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138528939","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The feasibility of perlite particles used in poly(ε-caprolactone) (PCL)/poly(lactic acid) (PLA) composite films by melt blending is explored to improve their mechanical property and analyze their antibacterial effect. The effect of perlite content on the mechanical, thermal, hydrophilic, and antibacterial properties of composite films is investigated. Results show that incorporation of 10 wt% perlite in PCL/PLA film improves the tensile strength and hydrophilicity by 1.2 times and 25 %, respectively. After perlite addition, the melting crystallization and glass transition temperature of PCL/PLA film are improved. The presence of perlite also confers antibacterial benefits to the composite film. PLA-based materials are used in the fields of medical materials and food packaging, and their ability to degrade in seawater has been a long-standing goal. In this study, the addition of PCL and perlite not only increases various properties and antibacterial effects, but the blending of inorganic materials and organic materials can destroy the link strength of polymer chain segments of organic materials and help them degrade in seawater. The prepared composite film features broad prospects for the development and application of various fields, such as food packaging and medical materials, reduce white pollution in the ocean.
{"title":"Preparation and property evaluation of poly(ε-caprolactone)/polylactic acid/perlite biodegradable composite film","authors":"Hui Li, Zhipeng Ma, Xiaolei Song, Yonggui Li, Xinqun Feng, Bing-Chiuan Shiu, Qian-Yu Yuan","doi":"10.1515/polyeng-2023-0200","DOIUrl":"https://doi.org/10.1515/polyeng-2023-0200","url":null,"abstract":"The feasibility of perlite particles used in poly(ε-caprolactone) (PCL)/poly(lactic acid) (PLA) composite films by melt blending is explored to improve their mechanical property and analyze their antibacterial effect. The effect of perlite content on the mechanical, thermal, hydrophilic, and antibacterial properties of composite films is investigated. Results show that incorporation of 10 wt% perlite in PCL/PLA film improves the tensile strength and hydrophilicity by 1.2 times and 25 %, respectively. After perlite addition, the melting crystallization and glass transition temperature of PCL/PLA film are improved. The presence of perlite also confers antibacterial benefits to the composite film. PLA-based materials are used in the fields of medical materials and food packaging, and their ability to degrade in seawater has been a long-standing goal. In this study, the addition of PCL and perlite not only increases various properties and antibacterial effects, but the blending of inorganic materials and organic materials can destroy the link strength of polymer chain segments of organic materials and help them degrade in seawater. The prepared composite film features broad prospects for the development and application of various fields, such as food packaging and medical materials, reduce white pollution in the ocean.","PeriodicalId":16881,"journal":{"name":"Journal of Polymer Engineering","volume":"15 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2023-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138543719","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This study explores the use of focused electron beam (FEB) dot irradiation and tensile stress to control crazing formation in polymers at the microscale. Polyethylene (PE) containing carbon was subjected to FEB dot irradiation at 5–20 kV of accelerating voltage, followed by nominal strains of 0–70 %. The results revealed that FEB irradiation affects the structure and mechanical properties of PE. The Raman spectroscopy showed a glassy polymer of amorphous structure with the intensity changed after irradiation, which led to craze formation at the location of the electron beam dot irradiation after the tensile deformation. Rhombus-shaped crazes were observed at the locations of the electron beam irradiation in the dot area, which were evenly distributed and sized. Our findings provide insights into the control of crazing location in polymers and provide a promising approach to controlling the different shapes and sizes of crazing in polymers for future applications.
{"title":"Location-controlled crazing in polyethylene using focused electron beams and tensile strain","authors":"Sirorat Toocharoen, Daisuke Yokota, Michihito Suzuki, Masayuki Shimojo","doi":"10.1515/polyeng-2023-0177","DOIUrl":"https://doi.org/10.1515/polyeng-2023-0177","url":null,"abstract":"This study explores the use of focused electron beam (FEB) dot irradiation and tensile stress to control crazing formation in polymers at the microscale. Polyethylene (PE) containing carbon was subjected to FEB dot irradiation at 5–20 kV of accelerating voltage, followed by nominal strains of 0–70 %. The results revealed that FEB irradiation affects the structure and mechanical properties of PE. The Raman spectroscopy showed a glassy polymer of amorphous structure with the intensity changed after irradiation, which led to craze formation at the location of the electron beam dot irradiation after the tensile deformation. Rhombus-shaped crazes were observed at the locations of the electron beam irradiation in the dot area, which were evenly distributed and sized. Our findings provide insights into the control of crazing location in polymers and provide a promising approach to controlling the different shapes and sizes of crazing in polymers for future applications.","PeriodicalId":16881,"journal":{"name":"Journal of Polymer Engineering","volume":"68 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2023-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138528935","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-11-24DOI: 10.1515/polyeng-2023-0144
Chengwei Yang, Yin Zhu, Tao Wang, Xu Wang, Yubin Wang
In recent decades of research, organic coatings have been considered the most effective and economical measure for corrosion protection of metals. However, defects in organic coatings created during the curing reaction provide corrosion channels for corrosive media, which in turn accelerate the failure of metallic materials. Functional nanomaterials are considered to be the key to solving this challenge. Metal organic frameworks (MOFs) materials, as an emerging nanomaterial, show great potential as a durable and efficient nano-corrosion filler in organic anti-corrosion coatings. Therefore, this paper reviews the application of MOFs materials as solid corrosion inhibitors, small molecule corrosion inhibitor vehicles and modified graphene oxide in anti-corrosion coatings and looks forward to the prospect of research on their application in engineering practice.
{"title":"Research progress of metal organic framework materials in anti-corrosion coating","authors":"Chengwei Yang, Yin Zhu, Tao Wang, Xu Wang, Yubin Wang","doi":"10.1515/polyeng-2023-0144","DOIUrl":"https://doi.org/10.1515/polyeng-2023-0144","url":null,"abstract":"In recent decades of research, organic coatings have been considered the most effective and economical measure for corrosion protection of metals. However, defects in organic coatings created during the curing reaction provide corrosion channels for corrosive media, which in turn accelerate the failure of metallic materials. Functional nanomaterials are considered to be the key to solving this challenge. Metal organic frameworks (MOFs) materials, as an emerging nanomaterial, show great potential as a durable and efficient nano-corrosion filler in organic anti-corrosion coatings. Therefore, this paper reviews the application of MOFs materials as solid corrosion inhibitors, small molecule corrosion inhibitor vehicles and modified graphene oxide in anti-corrosion coatings and looks forward to the prospect of research on their application in engineering practice.","PeriodicalId":16881,"journal":{"name":"Journal of Polymer Engineering","volume":"193 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2023-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138543038","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-11-24DOI: 10.1515/polyeng-2023-0192
Ahmed Nabil Louahem M’sabah, Nadira Bellili, Badrina Dairi, Nesrine Ammouchi
This study investigates the impact of gamma irradiation on the properties of waste coffee grounds (WCG)/high-density polyethylene (HDPE) composites. The composites were manufactured with 20 wt% of unirradiated and irradiated WCG at 10 and 20 kGy doses of gamma radiation. Through the utilization of a two-roll mill followed by a hydraulic press. The properties of the composites were analyzed through several methods, including contact angle measurements, hardness and tensile tests, thermogravimetric analysis (TGA), and scanning electron microscopy (SEM), in order to understand the influence of gamma irradiation. The addition of WCG decreased the tensile strength of the composite. However, gamma irradiation at 10 and 20 kGy led to substantial improvements in thermal stability and tensile strength compared to unirradiated samples. The SEM images showed the alterations within the fiber-matrix interface that corroborated the enhanced tensile properties after the treatment. While FTIR spectra confirmed the changes in functional groups of WCG caused by the irradiation process, gamma irradiation treatment not only increases fiber-matrix adhesion but also significantly improves the water resistance of the composites. These results suggest that gamma irradiation can be used for the modification of agro-waste materials as a beneficial process and the fabrication of high-performance, environmentally friendly composites.
{"title":"Effect of gamma irradiation on tensile, thermal and wettability properties of waste coffee grounds reinforced HDPE composites","authors":"Ahmed Nabil Louahem M’sabah, Nadira Bellili, Badrina Dairi, Nesrine Ammouchi","doi":"10.1515/polyeng-2023-0192","DOIUrl":"https://doi.org/10.1515/polyeng-2023-0192","url":null,"abstract":"This study investigates the impact of gamma irradiation on the properties of waste coffee grounds (WCG)/high-density polyethylene (HDPE) composites. The composites were manufactured with 20 wt% of unirradiated and irradiated WCG at 10 and 20 kGy doses of gamma radiation. Through the utilization of a two-roll mill followed by a hydraulic press. The properties of the composites were analyzed through several methods, including contact angle measurements, hardness and tensile tests, thermogravimetric analysis (TGA), and scanning electron microscopy (SEM), in order to understand the influence of gamma irradiation. The addition of WCG decreased the tensile strength of the composite. However, gamma irradiation at 10 and 20 kGy led to substantial improvements in thermal stability and tensile strength compared to unirradiated samples. The SEM images showed the alterations within the fiber-matrix interface that corroborated the enhanced tensile properties after the treatment. While FTIR spectra confirmed the changes in functional groups of WCG caused by the irradiation process, gamma irradiation treatment not only increases fiber-matrix adhesion but also significantly improves the water resistance of the composites. These results suggest that gamma irradiation can be used for the modification of agro-waste materials as a beneficial process and the fabrication of high-performance, environmentally friendly composites.","PeriodicalId":16881,"journal":{"name":"Journal of Polymer Engineering","volume":"30 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2023-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138528918","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract Natural fiber reinforced polymeric composites perform poor in mechanical and thermal properties at elevated temperatures due to the cellulose and hemicellulose contents of natural fiber start degrading at elevated temperature. In this research work, flame retardancy and thermal stability of treated and untreated kenaf fiber reinforced epoxy composites have been experimentally investigated and reported. Two composite laminates, one with 6 % NaOH Alkali treated and another with untreated woven kenaf mats, were fabricated by hand lay-up technique followed by compression molding with 40 % fiber weight fractions. Flame retardancy test and various thermal characteristics studies such as thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), heat deflection temperature (HDT), and morphological analysis via scanning electron microscopy (SEM) tests were carried out. The results showed that alkali treated kenaf fiber composite achieved V0 fire retardancy grade. The major weight losses, 86 % and 75.5 % for untreated and treated composites respectively were recorded between 300 °C and 450 °C. 13.6 % increase in HDT was noted for treated composite with 0.25 mm deflection at 0.45 MPa pressure condition. Thus the composite laminate with 6 % NaOH alkali-treated kenaf fiber achieved the best thermal stability with less degradation which is more suitable for automobile and aerospace applications.
{"title":"An experimental investigation of flame retardancy and thermal stability of treated and untreated kenaf fiber reinforced epoxy composites","authors":"Nivedhitha Durgam Muralidharan, Jeyanthi Subramanian, Sathish Kumar Rajamanickam, Venkatachalam Gopalan","doi":"10.1515/polyeng-2023-0128","DOIUrl":"https://doi.org/10.1515/polyeng-2023-0128","url":null,"abstract":"Abstract Natural fiber reinforced polymeric composites perform poor in mechanical and thermal properties at elevated temperatures due to the cellulose and hemicellulose contents of natural fiber start degrading at elevated temperature. In this research work, flame retardancy and thermal stability of treated and untreated kenaf fiber reinforced epoxy composites have been experimentally investigated and reported. Two composite laminates, one with 6 % NaOH Alkali treated and another with untreated woven kenaf mats, were fabricated by hand lay-up technique followed by compression molding with 40 % fiber weight fractions. Flame retardancy test and various thermal characteristics studies such as thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), heat deflection temperature (HDT), and morphological analysis via scanning electron microscopy (SEM) tests were carried out. The results showed that alkali treated kenaf fiber composite achieved V0 fire retardancy grade. The major weight losses, 86 % and 75.5 % for untreated and treated composites respectively were recorded between 300 °C and 450 °C. 13.6 % increase in HDT was noted for treated composite with 0.25 mm deflection at 0.45 MPa pressure condition. Thus the composite laminate with 6 % NaOH alkali-treated kenaf fiber achieved the best thermal stability with less degradation which is more suitable for automobile and aerospace applications.","PeriodicalId":16881,"journal":{"name":"Journal of Polymer Engineering","volume":"87 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135163164","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-10-27DOI: 10.1515/polyeng-2023-0164
Bin Liu, Xingyuan Huang, Shaoyi Ren, Xiaohui Zhang, Shuiquan Chen
Abstract During the gas-assisted extrusion process of plastic tubes embedded with antibacterial particles, the particles tend to agglomerate. The dispersion effect of these agglomerates using the nozzle-pressure-difference method is significantly influenced by the gas flow state. Therefore, this study establishes the nozzle dispersion model. The gas flow state near the nozzle is simulated and analyzed by using Ansys Fluent software. Gas-assisted extrusion experiments are conducted with different nozzle inlet pressures, and the size distribution of antibacterial particles is observed by using electron microscopy. The simulation results indicate that increasing the nozzle inlet pressure enhances the dispersion effect and expands the effective dispersion area. The experimental results demonstrate that using the nozzle disperses the agglomerates into particles with a diameter of approximately 100 nm. Furthermore, the nanoparticles diameter size decreases with the increase of the inlet pressure, validating the accuracy of the numerical analysis results.
{"title":"Numerical and experimental studies on the influence of gas pressure on particle size during gas-assisted extrusion of tubes with embedded antibacterial particles","authors":"Bin Liu, Xingyuan Huang, Shaoyi Ren, Xiaohui Zhang, Shuiquan Chen","doi":"10.1515/polyeng-2023-0164","DOIUrl":"https://doi.org/10.1515/polyeng-2023-0164","url":null,"abstract":"Abstract During the gas-assisted extrusion process of plastic tubes embedded with antibacterial particles, the particles tend to agglomerate. The dispersion effect of these agglomerates using the nozzle-pressure-difference method is significantly influenced by the gas flow state. Therefore, this study establishes the nozzle dispersion model. The gas flow state near the nozzle is simulated and analyzed by using Ansys Fluent software. Gas-assisted extrusion experiments are conducted with different nozzle inlet pressures, and the size distribution of antibacterial particles is observed by using electron microscopy. The simulation results indicate that increasing the nozzle inlet pressure enhances the dispersion effect and expands the effective dispersion area. The experimental results demonstrate that using the nozzle disperses the agglomerates into particles with a diameter of approximately 100 nm. Furthermore, the nanoparticles diameter size decreases with the increase of the inlet pressure, validating the accuracy of the numerical analysis results.","PeriodicalId":16881,"journal":{"name":"Journal of Polymer Engineering","volume":"290 9","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136234067","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract Polyurethane (PU) blended with nano-bactericidal agents was one of the most ways to obtain PU with antimicrobial properties. However, the bactericidal agent nanoparticles cannot effectively enrich the PU surface to reduce their antimicrobial properties. In this study, nano-silica particles with a large number of polar quaternary ammonium salt ( N , N -dimethyl-3-aminopropyl-12-alkyl-ammonium bromide trimethylsilyl, denoted as QAC) can easily enrich the PU surface to endow PU with excellent antibacterial properties after they were blended with PU film. The QAC on the surface of silica with different diameters (denoted as SiO 2 -Q- X ) can endow silica with antimicrobial properties and improve the repulsion between silica and PU to enhance the enrichment on PU surface of silica. A series of SiO 2 -Q- X /PU blend films were prepared and applied to inhibit the growth of the bacterial colony. The SiO 2 -Q- X /PU films can inhibit the growth of Gram-negative Escherichia coli and Gram-positive Staphylococcus epidermidis . The SiO 2 -Q- X with more polar QAC was easily enriched on the surface of PU and had a better bactericidal effect than those of SiO 2 -Q- X with a minor polar QAC. Moreover, the aging of the SiO 2 -Q- X /PU films did not affect their antibacterial effect.
摘要聚氨酯(PU)与纳米杀菌剂共混是获得具有抗菌性能的PU的主要途径之一。然而，纳米杀菌剂不能有效地富集PU表面，降低其抗菌性能。在本研究中，含有大量极性季铵盐(N, N -二甲基-3-氨基丙基-12-烷基-溴化铵三甲基硅基，简称QAC)的纳米二氧化硅颗粒与PU膜共混后，很容易富集PU表面，使PU具有优异的抗菌性能。不同直径二氧化硅表面的QAC(记为sio2 - q - X)可以赋予二氧化硅抗菌性能，并改善二氧化硅与PU之间的斥力，从而增强二氧化硅在PU表面的富集。制备了一系列sio2 - q - X /PU共混膜，并应用于抑制细菌菌落的生长。sio2 - q - X /PU膜能抑制革兰氏阴性大肠杆菌和革兰氏阳性表皮葡萄球菌的生长。极性QAC较多的sio2 - q - X易于在PU表面富集，杀菌效果优于极性QAC较少的sio2 - q - X。此外，sio2 - q - X /PU薄膜的老化不影响其抗菌效果。
{"title":"Promoting antibacterial activity of polyurethane blend films by regulating surface-enrichment of SiO<sub>2</sub> bactericidal agent","authors":"Guanglong Li, Shenwei Shi, Lexing Zhang, Ting Li, Yang Wang, Weifu Dong","doi":"10.1515/polyeng-2023-0122","DOIUrl":"https://doi.org/10.1515/polyeng-2023-0122","url":null,"abstract":"Abstract Polyurethane (PU) blended with nano-bactericidal agents was one of the most ways to obtain PU with antimicrobial properties. However, the bactericidal agent nanoparticles cannot effectively enrich the PU surface to reduce their antimicrobial properties. In this study, nano-silica particles with a large number of polar quaternary ammonium salt ( N , N -dimethyl-3-aminopropyl-12-alkyl-ammonium bromide trimethylsilyl, denoted as QAC) can easily enrich the PU surface to endow PU with excellent antibacterial properties after they were blended with PU film. The QAC on the surface of silica with different diameters (denoted as SiO 2 -Q- X ) can endow silica with antimicrobial properties and improve the repulsion between silica and PU to enhance the enrichment on PU surface of silica. A series of SiO 2 -Q- X /PU blend films were prepared and applied to inhibit the growth of the bacterial colony. The SiO 2 -Q- X /PU films can inhibit the growth of Gram-negative Escherichia coli and Gram-positive Staphylococcus epidermidis . The SiO 2 -Q- X with more polar QAC was easily enriched on the surface of PU and had a better bactericidal effect than those of SiO 2 -Q- X with a minor polar QAC. Moreover, the aging of the SiO 2 -Q- X /PU films did not affect their antibacterial effect.","PeriodicalId":16881,"journal":{"name":"Journal of Polymer Engineering","volume":"520 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136376165","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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