Pub Date : 2024-05-08DOI: 10.1515/polyeng-2024-0026
Qingpeng He, Lei Ding, Dandan Li, Yuanjie Zhang, Sihang Zhang
The hydrophobicity of polyolefin separators causes poor compatibility with the internal environment of lithium-ion batteries and thus elevates lithium-ion migration barriers. In this research, hydroxy-terminated hyperbranched polymer (HTHP) coated separators are fabricated successfully based on the simple and easy-on impregnation method. Abundant hydroxyl groups in HTHP reinforce separator electrolyte affinity, generating the much lower contact angle and higher electrolyte uptake. Accordingly, HTHP-coated separators show broader electrochemical window and superior ionic conductivity and Li+ transport number, which facilitate the Li+ migration within porous pathways and hence maximally weaken counteranions-induced polarizations. The lower interfacial resistances also guarantee the Li+ accelerated diffusion via the separator–electrodes interfaces. Therefore, batteries containing modified separators exhibit optimized C-rate capacity and cycling stability. However, immoderate HTHP coating blocks partial pores and thus restricts Li+ transference, which deteriorates C-rate capacity and cycling durability in turn. This separator modification scheme possesses advantages of simple preparation, environment-friendly, and low manufacturing cost, providing practical guidance for low-cost and high-performance separator manufacture.
聚烯烃隔膜的疏水性导致其与锂离子电池内部环境的兼容性较差，从而提高了锂离子迁移障碍。本研究采用简单易行的浸渍法成功制备了羟基封端超支化聚合物（HTHP）涂层隔膜。HTHP 中丰富的羟基增强了分离器对电解质的亲和力，使其具有更低的接触角和更高的电解质吸收率。因此，HTHP 涂层隔膜具有更宽的电化学窗口、更高的离子电导率和 Li+ 传输数，这有利于 Li+ 在多孔通道内迁移，从而最大程度地削弱了反离子引起的极化。较低的界面电阻也保证了 Li+ 通过隔膜-电极界面加速扩散。因此，含有改性隔膜的电池具有最佳的 C 率容量和循环稳定性。然而，过量的 HTHP 涂层会堵塞部分孔隙，从而限制 Li+ 的传输，进而降低 C 率容量和循环耐久性。这种隔膜改性方案具有制备简单、环境友好、制造成本低等优点，为低成本、高性能隔膜的制造提供了实用指导。
{"title":"Effect of hydroxy-terminated hyperbranched polymer coated separator on the lithium-ion battery performances","authors":"Qingpeng He, Lei Ding, Dandan Li, Yuanjie Zhang, Sihang Zhang","doi":"10.1515/polyeng-2024-0026","DOIUrl":"https://doi.org/10.1515/polyeng-2024-0026","url":null,"abstract":"The hydrophobicity of polyolefin separators causes poor compatibility with the internal environment of lithium-ion batteries and thus elevates lithium-ion migration barriers. In this research, hydroxy-terminated hyperbranched polymer (HTHP) coated separators are fabricated successfully based on the simple and easy-on impregnation method. Abundant hydroxyl groups in HTHP reinforce separator electrolyte affinity, generating the much lower contact angle and higher electrolyte uptake. Accordingly, HTHP-coated separators show broader electrochemical window and superior ionic conductivity and Li<jats:sup>+</jats:sup> transport number, which facilitate the Li<jats:sup>+</jats:sup> migration within porous pathways and hence maximally weaken counteranions-induced polarizations. The lower interfacial resistances also guarantee the Li<jats:sup>+</jats:sup> accelerated diffusion via the separator–electrodes interfaces. Therefore, batteries containing modified separators exhibit optimized <jats:italic>C</jats:italic>-rate capacity and cycling stability. However, immoderate HTHP coating blocks partial pores and thus restricts Li<jats:sup>+</jats:sup> transference, which deteriorates <jats:italic>C</jats:italic>-rate capacity and cycling durability in turn. This separator modification scheme possesses advantages of simple preparation, environment-friendly, and low manufacturing cost, providing practical guidance for low-cost and high-performance separator manufacture.","PeriodicalId":16881,"journal":{"name":"Journal of Polymer Engineering","volume":"4320 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2024-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140930243","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 : 2024-04-30DOI: 10.1515/polyeng-2024-0025
Joseph Raj Xavier
Manganese dioxide (MnO2) nanoparticles were modified by graphitic carbon nitride (GCN) and polylpyrrole (Ppy) to enhance their electrochemical performance. The surface influence, crystalline structure, and electrochemical performance of the Ppy/GCN/MnO2 material were characterized and compared with those of pristine MnO2. It is found that surface modification can improve the structural stability of MnO2 without decreasing its available specific capacitance. The electrochemical properties of synthesized Ppy/GCN/MnO2 electrode were evaluated using cyclic voltammetry (CV) and AC impedance techniques in 5 M KOH electrolyte. Specific capacitances of 486, 815, 921, and 1377 F/g were obtained for MnO2, Ppy/MnO2, GCN/MnO2, and Ppy/GCN/MnO2, respectively, at 5 A/g. This improvement is attributed to the synergistic effect of GCN and Ppy in the Ppy/GCN/MnO2 electrode material. The Ppy/GCN/MnO2 electrode in KOH has average specific energy and specific power densities of 172 Wh kg−1 and 2065 W kg−1, respectively. Only 2 % of the capacitance’s initial value is lost after 10,000 cycles. The resulting Ppy/GCN/MnO2 nanocomposite had very stable and porous layered structures. This work demonstrates that Ppy/GCN/MnO2 nanomaterials exhibit good structural stability and electrochemical performance and are good materials for supercapacitor applications.
{"title":"Facile synthesis and electrochemical investigation of graphitic carbon nitride/manganese dioxide incorporated polypyrrole nanocomposite for high-performance energy storage applications","authors":"Joseph Raj Xavier","doi":"10.1515/polyeng-2024-0025","DOIUrl":"https://doi.org/10.1515/polyeng-2024-0025","url":null,"abstract":"Manganese dioxide (MnO<jats:sub>2</jats:sub>) nanoparticles were modified by graphitic carbon nitride (GCN) and polylpyrrole (Ppy) to enhance their electrochemical performance. The surface influence, crystalline structure, and electrochemical performance of the Ppy/GCN/MnO<jats:sub>2</jats:sub> material were characterized and compared with those of pristine MnO<jats:sub>2</jats:sub>. It is found that surface modification can improve the structural stability of MnO<jats:sub>2</jats:sub> without decreasing its available specific capacitance. The electrochemical properties of synthesized Ppy/GCN/MnO<jats:sub>2</jats:sub> electrode were evaluated using cyclic voltammetry (CV) and AC impedance techniques in 5 M KOH electrolyte. Specific capacitances of 486, 815, 921, and 1377 F/g were obtained for MnO<jats:sub>2</jats:sub>, Ppy/MnO<jats:sub>2</jats:sub>, GCN/MnO<jats:sub>2</jats:sub>, and Ppy/GCN/MnO<jats:sub>2</jats:sub>, respectively, at 5 A/g. This improvement is attributed to the synergistic effect of GCN and Ppy in the Ppy/GCN/MnO<jats:sub>2</jats:sub> electrode material. The Ppy/GCN/MnO<jats:sub>2</jats:sub> electrode in KOH has average specific energy and specific power densities of 172 Wh kg<jats:sup>−1</jats:sup> and 2065 W kg<jats:sup>−1</jats:sup>, respectively. Only 2 % of the capacitance’s initial value is lost after 10,000 cycles. The resulting Ppy/GCN/MnO<jats:sub>2</jats:sub> nanocomposite had very stable and porous layered structures. This work demonstrates that Ppy/GCN/MnO<jats:sub>2</jats:sub> nanomaterials exhibit good structural stability and electrochemical performance and are good materials for supercapacitor applications.","PeriodicalId":16881,"journal":{"name":"Journal of Polymer Engineering","volume":"52 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2024-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140841075","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}
Despite the widespread attention garnered by self-healing hydrogels in various fields, achieving a balance between high mechanical strength and self-healing capability remains a challenge. Particularly, the addition of fillers in the fabrication of spray-coated waterproof materials hinders the movement of molecular chains. Simultaneously, the self-repair of metal ions is hindered by issues such as a prolonged required time and low repair rate. Therefore, we introduce a polyvinyl alcohol (PVA) solution subjected to freeze–thaw cycles into the acrylic acid magnesium/calcium hydrogel system, creating a self-healing hydrogel with an interpenetrating polymer network (IPN). Due to the abundance of hydroxyl groups on the PVA molecular chains, during the freezing process, some PVA chains form microcrystals that do not dissolve upon thawing at room temperature. These microcrystals act as cross-linking points, connecting PVA chains into a 3D network. Consequently, the hydrogel, under the dual effects of hydrogen bonds and coordination bonds, exhibits excellent mechanical properties and the ability to self-heal at room temperature. Furthermore, by adjusting the concentration of the PVA solution, the mechanical properties and healing ability of the hydrogel can be tailored to meet various construction requirements.
{"title":"Preparation and properties of acrylate/polyvinyl alcohol self-healing hydrogels based on hydrogen bonds and coordination bonds","authors":"Yaxin Gu, Minghui Sun, Yunxue Liu, Zhaorong Fan, Henggang Jin, Xiaoming Li","doi":"10.1515/polyeng-2023-0284","DOIUrl":"https://doi.org/10.1515/polyeng-2023-0284","url":null,"abstract":"Despite the widespread attention garnered by self-healing hydrogels in various fields, achieving a balance between high mechanical strength and self-healing capability remains a challenge. Particularly, the addition of fillers in the fabrication of spray-coated waterproof materials hinders the movement of molecular chains. Simultaneously, the self-repair of metal ions is hindered by issues such as a prolonged required time and low repair rate. Therefore, we introduce a polyvinyl alcohol (PVA) solution subjected to freeze–thaw cycles into the acrylic acid magnesium/calcium hydrogel system, creating a self-healing hydrogel with an interpenetrating polymer network (IPN). Due to the abundance of hydroxyl groups on the PVA molecular chains, during the freezing process, some PVA chains form microcrystals that do not dissolve upon thawing at room temperature. These microcrystals act as cross-linking points, connecting PVA chains into a 3D network. Consequently, the hydrogel, under the dual effects of hydrogen bonds and coordination bonds, exhibits excellent mechanical properties and the ability to self-heal at room temperature. Furthermore, by adjusting the concentration of the PVA solution, the mechanical properties and healing ability of the hydrogel can be tailored to meet various construction requirements.","PeriodicalId":16881,"journal":{"name":"Journal of Polymer Engineering","volume":"24 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2024-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140841299","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 : 2024-04-20DOI: 10.1515/polyeng-2023-0184
Xiushan Fan, Jin Wu
In this study, ramie fiber was employed to prepare cellulose triacetate (CTA) films. Subsequently, the photodegradation behaviors without photosensitizers of CTA films were carried out in photodegradation chambers at 40 °C. Additionally, the photodegradation procedure of films was assessed by the attenuated total reflection infrared (ATR-IR), 1H nuclear magnetic resonance (1H NMR), scanning electron microscope (SEM), thermal properties, degree of substitution (DS), and tensile strength. The research consequences indicated that the mechanical strength of the CTA films was decreased significantly after ultraviolet (UV) irradiation for 300 h. However, the DS of the films is almost invariable when they are exposed to UV irradiation. Meanwhile, the suggested mechanism for photodegradation of CTA was also exhibited in this paper. This study provides a mild and potential pre-treatment approach for the biodegradation of LCD used waste CTA films.
{"title":"Study on the photodegradation behaviors of liquid crystal display (LCD) used optical cellulose triacetate films","authors":"Xiushan Fan, Jin Wu","doi":"10.1515/polyeng-2023-0184","DOIUrl":"https://doi.org/10.1515/polyeng-2023-0184","url":null,"abstract":"In this study, ramie fiber was employed to prepare cellulose triacetate (CTA) films. Subsequently, the photodegradation behaviors without photosensitizers of CTA films were carried out in photodegradation chambers at 40 °C. Additionally, the photodegradation procedure of films was assessed by the attenuated total reflection infrared (ATR-IR), <jats:sup>1</jats:sup>H nuclear magnetic resonance (<jats:sup>1</jats:sup>H NMR), scanning electron microscope (SEM), thermal properties, degree of substitution (DS), and tensile strength. The research consequences indicated that the mechanical strength of the CTA films was decreased significantly after ultraviolet (UV) irradiation for 300 h. However, the DS of the films is almost invariable when they are exposed to UV irradiation. Meanwhile, the suggested mechanism for photodegradation of CTA was also exhibited in this paper. This study provides a mild and potential pre-treatment approach for the biodegradation of LCD used waste CTA films.","PeriodicalId":16881,"journal":{"name":"Journal of Polymer Engineering","volume":"57 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2024-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140625308","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 : 2024-04-01DOI: 10.1515/polyeng-2023-0301
Liming Dong, Hua Sun, Danfeng Wang, Shifan Wang
This study presents the synthesis of a magnetic sodium alginate hydrogel for efficient adsorption of heavy metal ions. The hydrogel, composed of sodium alginate, demonstrates a network structure that facilitates effective metal ion adsorption. Utilizing magnetic forces, the hydrogel can be easily separated and regenerated, exhibiting excellent recyclability. Compared to traditional adsorbents, the magnetic sodium alginate hydrogel shows significantly improved adsorption capacity, particularly for Pb2+ ions. At pH ca. 4 and an adsorption time of 120 min, the hydrogel achieves a maximum adsorption capacity of 137 mg/g for Pb2+, with an adsorption rate of 83 %. The adsorption kinetics follow a pseudo-second-order equation, while thermodynamically, the process adheres to the Freundlich adsorption model, with capacity positively correlated with temperature and concentration. The negative ΔH value indicates an exothermic and spontaneous adsorption process. In competitive adsorption experiments, the hydrogel demonstrates strong selective adsorption towards Pb2+. It also exhibits excellent reusability, maintaining 80 % adsorption capacity after 10 cycles. The magnetic sodium alginate composite material possesses favorable recyclability and convenient magnetic separation properties, offering significant potential in various applications.
{"title":"Enhanced Pb2+ adsorption using recyclable magnetic sodium alginate in a network structure for high renewable capacity","authors":"Liming Dong, Hua Sun, Danfeng Wang, Shifan Wang","doi":"10.1515/polyeng-2023-0301","DOIUrl":"https://doi.org/10.1515/polyeng-2023-0301","url":null,"abstract":"This study presents the synthesis of a magnetic sodium alginate hydrogel for efficient adsorption of heavy metal ions. The hydrogel, composed of sodium alginate, demonstrates a network structure that facilitates effective metal ion adsorption. Utilizing magnetic forces, the hydrogel can be easily separated and regenerated, exhibiting excellent recyclability. Compared to traditional adsorbents, the magnetic sodium alginate hydrogel shows significantly improved adsorption capacity, particularly for Pb<jats:sup>2+</jats:sup> ions. At pH ca. 4 and an adsorption time of 120 min, the hydrogel achieves a maximum adsorption capacity of 137 mg/g for Pb<jats:sup>2+</jats:sup>, with an adsorption rate of 83 %. The adsorption kinetics follow a pseudo-second-order equation, while thermodynamically, the process adheres to the Freundlich adsorption model, with capacity positively correlated with temperature and concentration. The negative Δ<jats:italic>H</jats:italic> value indicates an exothermic and spontaneous adsorption process. In competitive adsorption experiments, the hydrogel demonstrates strong selective adsorption towards Pb<jats:sup>2+</jats:sup>. It also exhibits excellent reusability, maintaining 80 % adsorption capacity after 10 cycles. The magnetic sodium alginate composite material possesses favorable recyclability and convenient magnetic separation properties, offering significant potential in various applications.","PeriodicalId":16881,"journal":{"name":"Journal of Polymer Engineering","volume":"22 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140600912","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 : 2024-03-28DOI: 10.1515/polyeng-2024-0027
Sida Fu, Haidong Li, Hongtao Liu, Yan Zhao, Zhiguang Xu
In this study, superoleophobic and superhydrophilic fabrics with self-healing property have been prepared by the use of chitosan (CS), sodium tripolyphosphate (TPP), Capstone FS-60 (FS-60), and dopamine hydrochloride as coating materials. The coated fabrics show oil contact angle of 154° for soybean oil, and water droplets can be spread on the surface in 1 s. Notably, it is further demonstrated that the coating has self-healing property. After undergoing home laundering, Martindale abrasion, or acid/base etching, the fabrics lose their superoleophobic and superhydrophilic property, while they can restore the superoleophobic and superhydrophilic property by just being wetted with distilled water and then heated in an oven. Additionally, the coated fabrics prove effective in separating oil/water mixtures. These fabrics, endowed with superoleophobic and superhydrophilic property along with self-healing capability, present innovative features and applications across diverse fields.
{"title":"Self-healing superoleophobic and superhydrophilic fabrics for efficient oil/water separation","authors":"Sida Fu, Haidong Li, Hongtao Liu, Yan Zhao, Zhiguang Xu","doi":"10.1515/polyeng-2024-0027","DOIUrl":"https://doi.org/10.1515/polyeng-2024-0027","url":null,"abstract":"In this study, superoleophobic and superhydrophilic fabrics with self-healing property have been prepared by the use of chitosan (CS), sodium tripolyphosphate (TPP), Capstone FS-60 (FS-60), and dopamine hydrochloride as coating materials. The coated fabrics show oil contact angle of 154° for soybean oil, and water droplets can be spread on the surface in 1 s. Notably, it is further demonstrated that the coating has self-healing property. After undergoing home laundering, Martindale abrasion, or acid/base etching, the fabrics lose their superoleophobic and superhydrophilic property, while they can restore the superoleophobic and superhydrophilic property by just being wetted with distilled water and then heated in an oven. Additionally, the coated fabrics prove effective in separating oil/water mixtures. These fabrics, endowed with superoleophobic and superhydrophilic property along with self-healing capability, present innovative features and applications across diverse fields.","PeriodicalId":16881,"journal":{"name":"Journal of Polymer Engineering","volume":"14 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2024-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140324199","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 : 2024-03-28DOI: 10.1515/polyeng-2023-0278
Aman Shukla, Sachin Kumar, Akanksha Bhatt, Priyank Purohit, Shashank Kailkhura, Magda H. Abdellattif
The development of stable carrageenan nanoparticles connected to the sulfate functional group of carrageenan and barium ion for the use of selectively targeting cancer cell and imaging contrast to help with diagnosis (tracing/imaging) is the concern of the present research. This study provides an overview of ion substitution chemistry, highlighting the role of ions and how they affect the applicability of carrageenan. The characteristic of barium sulfate, which is widely used as radiopaque to provide contrast for diagnostic radiographic examinations in the gastrointestinal mucosa, is provided by its linkage with the barium ion despite K+’s natural binding with carrageenan. The additional role of the Ba ion linked carrageenan was found highly selective for cancer cell through the in vitro cell line assay; however, the nonattachability to the normal cell makes useful to trace and treat the cancer cell. The tracing is possible because of the barium sulfate functional group and its nanosize molecule, which shows precision medicine, fluorescence, and X-ray/CT imaging character, to be utilized as the diagnostic purpose, especially to tumor cell. The apoptosis from the Ba2+ ion by the inhibition of outflux of K+ to disturb the osmosis of cell and selectivity of the molecules because of high pKa (Logarithms of acid dissociation constant) value, which makes the drug more active anionic (nonpolar) form in the cancer cell and ionic form (polar) in the normal cell, which avoids the interaction with normal cell and facilitate the interaction with cancer cell. In conclusion, the cancer cell selectivity with fluorescence and radiopaque properties of Ba ion linked carrageenan makes the molecule useful for tracing, imaging, and treating cancer cell with high selectivity.
本研究关注的是开发连接卡拉胶硫酸酯官能团和钡离子的稳定卡拉胶纳米粒子，用于选择性靶向癌细胞和成像对比，以帮助诊断（追踪/成像）。本研究概述了离子替代化学，强调了离子的作用及其如何影响卡拉胶的适用性。尽管 K+ 与卡拉胶天然结合，但硫酸钡的特点是与钡离子连接，因此被广泛用于不透射线的胃肠道粘膜放射诊断检查，以提供对比度。通过体外细胞系试验发现，与钡离子连接的卡拉胶对癌细胞具有高度选择性；然而，它对正常细胞的非附着性使其有助于追踪和治疗癌细胞。由于硫酸钡官能团及其纳米级分子具有精准医疗、荧光和 X 射线/CT 成像等特性，因此可用于诊断目的，尤其是对肿瘤细胞的诊断。Ba2+离子通过抑制K+的外流干扰细胞的渗透作用而导致细胞凋亡，同时由于高pKa（酸解离常数对数）值使分子具有选择性，从而使药物在癌细胞中以阴离子（非极性）形式更为活跃，而在正常细胞中则以离子形式（极性）活跃，避免了与正常细胞的相互作用，促进了与癌细胞的相互作用。总之，与 Ba 离子连接的卡拉胶具有癌细胞选择性、荧光性和不透射线性，因此该分子可用于对癌细胞进行高选择性追踪、成像和治疗。
{"title":"Iota carrageenan linked barium ion nanoparticle synthesis for the selective targeted imaging and inhibition of cancer cells","authors":"Aman Shukla, Sachin Kumar, Akanksha Bhatt, Priyank Purohit, Shashank Kailkhura, Magda H. Abdellattif","doi":"10.1515/polyeng-2023-0278","DOIUrl":"https://doi.org/10.1515/polyeng-2023-0278","url":null,"abstract":"The development of stable carrageenan nanoparticles connected to the sulfate functional group of carrageenan and barium ion for the use of selectively targeting cancer cell and imaging contrast to help with diagnosis (tracing/imaging) is the concern of the present research. This study provides an overview of ion substitution chemistry, highlighting the role of ions and how they affect the applicability of carrageenan. The characteristic of barium sulfate, which is widely used as radiopaque to provide contrast for diagnostic radiographic examinations in the gastrointestinal mucosa, is provided by its linkage with the barium ion despite K<jats:sup>+</jats:sup>’s natural binding with carrageenan. The additional role of the Ba ion linked carrageenan was found highly selective for cancer cell through the <jats:italic>in vitro</jats:italic> cell line assay; however, the nonattachability to the normal cell makes useful to trace and treat the cancer cell. The tracing is possible because of the barium sulfate functional group and its nanosize molecule, which shows precision medicine, fluorescence, and X-ray/CT imaging character, to be utilized as the diagnostic purpose, especially to tumor cell. The apoptosis from the Ba<jats:sup>2+</jats:sup> ion by the inhibition of outflux of K<jats:sup>+</jats:sup> to disturb the osmosis of cell and selectivity of the molecules because of high pKa (Logarithms of acid dissociation constant) value, which makes the drug more active anionic (nonpolar) form in the cancer cell and ionic form (polar) in the normal cell, which avoids the interaction with normal cell and facilitate the interaction with cancer cell. In conclusion, the cancer cell selectivity with fluorescence and radiopaque properties of Ba ion linked carrageenan makes the molecule useful for tracing, imaging, and treating cancer cell with high selectivity.","PeriodicalId":16881,"journal":{"name":"Journal of Polymer Engineering","volume":"87 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2024-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140325954","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}
Vancomycin in sustained release still needs to be investigated. Polylactic acid (PLA) was widely used in the biomedical field for its good biocompatibility, especially in the field of controlled drug release. In this study, polyethylene glycol (PEG) was used to modify PLA to improve the hydrophilicity of the material. The synthesis of the block copolymers was proven by infrared and nuclear magnetic characterization and the hydrophilicity was tested. Vancomycin was immobilized by coaxial electrospray, and PLA-PEG6000-PLA was used as the shell layer. The parameters of coaxial electrospray under this material were explored, and the effects of concentration, voltage and temperature on the formation of microspheres were systematically studied. The optimum parameters were determined as follows: concentration 20 wt%, temperature 35 °C and voltage 14 kV. The maximum encapsulation rate and drug loading were calculated to be 89.54 ± 1.22 % and 15.33 ± 0.97 %, respectively, and the cumulative release of drug-loaded microspheres was less than 45 % in 24 h with a slow releasing time of more than one month. The drug loaded microspheres showed good sustained release and good control of burst release.
{"title":"Preparation and properties of vancomycin-loaded PLA-PEG-PLA microspheres by electrostatic spray technology","authors":"Ruimin Tang, Yan Feng, Rongying Chen, Minglong Yuan, Mingwei Yuan, Hongli Li, Dengbang Jiang","doi":"10.1515/polyeng-2023-0191","DOIUrl":"https://doi.org/10.1515/polyeng-2023-0191","url":null,"abstract":"Vancomycin in sustained release still needs to be investigated. Polylactic acid (PLA) was widely used in the biomedical field for its good biocompatibility, especially in the field of controlled drug release. In this study, polyethylene glycol (PEG) was used to modify PLA to improve the hydrophilicity of the material. The synthesis of the block copolymers was proven by infrared and nuclear magnetic characterization and the hydrophilicity was tested. Vancomycin was immobilized by coaxial electrospray, and PLA-PEG<jats:sub>6000</jats:sub>-PLA was used as the shell layer. The parameters of coaxial electrospray under this material were explored, and the effects of concentration, voltage and temperature on the formation of microspheres were systematically studied. The optimum parameters were determined as follows: concentration 20 wt%, temperature 35 °C and voltage 14 kV. The maximum encapsulation rate and drug loading were calculated to be 89.54 ± 1.22 % and 15.33 ± 0.97 %, respectively, and the cumulative release of drug-loaded microspheres was less than 45 % in 24 h with a slow releasing time of more than one month. The drug loaded microspheres showed good sustained release and good control of burst release.","PeriodicalId":16881,"journal":{"name":"Journal of Polymer Engineering","volume":"87 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2024-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140316045","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 : 2024-03-15DOI: 10.1515/polyeng-2023-0267
Avinash Petta, Sabindra Kachhap
The exploration of natural fillers has garnered considerable attention in response to persistent concerns about material pollution and diminishing resources. In the context of this study, one such natural filler under scrutiny is mango shell powder (MSP), a byproduct derived from mango processing. The central objective of this investigation is to assess the potential of MSP as a filler in flax-jute hybrid epoxy composites, with a keen focus on enhancing their properties. Specifically, the study aims to elucidate the impact of incorporating MSP filler on the mechanical and wear characteristics of these composites. The experimental approach involved the preparation of composite samples with varying weight percentages of MSP filler, ranging from 1 % to 9 % (1 %, 3 %, 5 %, 7 %, and 9 %), while maintaining a constant fiber and matrix weight ratio. The results obtained from the experiments revealed that composite samples containing a 7 % filler exhibited superior mechanical properties, while wear resistance demonstrated a noticeable decrease with the progressive increase in filler content. These findings suggest the potential efficacy of MSP as a filler in enhancing both the mechanical and wear characteristics of flax-jute hybrid epoxy composites, providing valuable insights for further applications in sustainable composite materials.
{"title":"Potential of mango shell powder as a bio filler in flax-jute hybrid epoxy composites: mechanical and wear characterization","authors":"Avinash Petta, Sabindra Kachhap","doi":"10.1515/polyeng-2023-0267","DOIUrl":"https://doi.org/10.1515/polyeng-2023-0267","url":null,"abstract":"The exploration of natural fillers has garnered considerable attention in response to persistent concerns about material pollution and diminishing resources. In the context of this study, one such natural filler under scrutiny is mango shell powder (MSP), a byproduct derived from mango processing. The central objective of this investigation is to assess the potential of MSP as a filler in flax-jute hybrid epoxy composites, with a keen focus on enhancing their properties. Specifically, the study aims to elucidate the impact of incorporating MSP filler on the mechanical and wear characteristics of these composites. The experimental approach involved the preparation of composite samples with varying weight percentages of MSP filler, ranging from 1 % to 9 % (1 %, 3 %, 5 %, 7 %, and 9 %), while maintaining a constant fiber and matrix weight ratio. The results obtained from the experiments revealed that composite samples containing a 7 % filler exhibited superior mechanical properties, while wear resistance demonstrated a noticeable decrease with the progressive increase in filler content. These findings suggest the potential efficacy of MSP as a filler in enhancing both the mechanical and wear characteristics of flax-jute hybrid epoxy composites, providing valuable insights for further applications in sustainable composite materials.","PeriodicalId":16881,"journal":{"name":"Journal of Polymer Engineering","volume":"11 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2024-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140154563","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 : 2024-03-12DOI: 10.1515/polyeng-2023-0263
Reasmyraj R. Subramaniam, Amirul Syafiq, Vengadaesvaran Balakrishnan, Muhammad Shakeel Ahmad, Nasrudin Abd Rahim, Pouya Hassandarvish
One of the biggest problems facing medical science today is preventing viral outbreaks, which highlights the significance of research initiatives aimed at creating antimicrobial coatings for a range of products, including textiles, medical devices, and public spaces. In this study, we aimed to determine the possible antiviral effects of polyethylene glycol (PEG) coating on feline coronavirus (FCoV). The PEG coatings were synthesized by a simple mixing method with a water-based acrylic binder in different weight percentages (3, 5, 10, 15, 20, and 25 wt%). The Spearman–Karber technique was used to calculate the viral titers, which were then expressed as the tissue culture infectious dose at 50 % CPE (TCID50/ml). 20 wt% PEG could result in a 3 log10 reduction in virus titer with an inhibition rate of approximately 99.9 % against FCoV. The increment of PEG weight percent from 0 to 25 wt% decreases the hardness and glass transition temperature of the coatings from 38.1 to 5.5 HV and 15.45 to −15.48 °C. Apart from that, the wettability analysis has revealed that PEG coating is hydrophilic with water contact angle (WCA) of around 75 ± 0.5°–85 ± 0.5°. Adding 25 wt% of PEG makes the coating to be superhydrophilic with WCA of 39.85 ± 0.5°.
{"title":"A study on influence of wettability on antiviral coating using polyethylene glycol (PEG) and acrylic binder","authors":"Reasmyraj R. Subramaniam, Amirul Syafiq, Vengadaesvaran Balakrishnan, Muhammad Shakeel Ahmad, Nasrudin Abd Rahim, Pouya Hassandarvish","doi":"10.1515/polyeng-2023-0263","DOIUrl":"https://doi.org/10.1515/polyeng-2023-0263","url":null,"abstract":"One of the biggest problems facing medical science today is preventing viral outbreaks, which highlights the significance of research initiatives aimed at creating antimicrobial coatings for a range of products, including textiles, medical devices, and public spaces. In this study, we aimed to determine the possible antiviral effects of polyethylene glycol (PEG) coating on feline coronavirus (FCoV). The PEG coatings were synthesized by a simple mixing method with a water-based acrylic binder in different weight percentages (3, 5, 10, 15, 20, and 25 wt%). The Spearman–Karber technique was used to calculate the viral titers, which were then expressed as the tissue culture infectious dose at 50 % CPE (TCID50/ml). 20 wt% PEG could result in a 3 log<jats:sub>10</jats:sub> reduction in virus titer with an inhibition rate of approximately 99.9 % against FCoV. The increment of PEG weight percent from 0 to 25 wt% decreases the hardness and glass transition temperature of the coatings from 38.1 to 5.5 HV and 15.45 to −15.48 °C. Apart from that, the wettability analysis has revealed that PEG coating is hydrophilic with water contact angle (WCA) of around 75 ± 0.5°–85 ± 0.5°. Adding 25 wt% of PEG makes the coating to be superhydrophilic with WCA of 39.85 ± 0.5°.","PeriodicalId":16881,"journal":{"name":"Journal of Polymer Engineering","volume":"114 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2024-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140129674","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：