首页 > 最新文献

Current Applied Polymer Science最新文献

英文 中文
Materials from Biomass: A Constant Challenge 生物质材料:一个持续的挑战
Pub Date : 2021-12-01 DOI: 10.2174/245227160403211231164546
M. Poletto
{"title":"Materials from Biomass: A Constant Challenge","authors":"M. Poletto","doi":"10.2174/245227160403211231164546","DOIUrl":"https://doi.org/10.2174/245227160403211231164546","url":null,"abstract":"","PeriodicalId":10768,"journal":{"name":"Current Applied Polymer Science","volume":"732 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74771899","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Auxetic Polymer Foams: Production, Modeling and Applications 增塑型聚合物泡沫:生产、建模和应用
Pub Date : 2021-11-30 DOI: 10.2174/2452271604666211130123921
Ouassim Hamdi, D. Rodrigue
Auxetic materials have high potential due to their exceptional properties resulting from their negative Poisson ratio. Recently, several auxetic polymer-based materials have been developed. In fact, several applications are looking for a lightweight (less material consumed in production and transport) while having high mechanical performances (impact absorption, rigidity, strength, resistance, etc.). So, a balance between density and toughness/strength is of high importance, especially for military, sporting, and transport applications. So auxetic materials (especially foams) can provide high impact protection while limiting the material’s weight.This article presents a review of recent advances with a focus on auxetic polymers, with particular emphasis on the auxetic polymer foams in terms of their fabrication methods and processing conditions (depending on the nature of the cellular structure), the effect of the fabrication parameters on their final properties, as well as their models and potential applications.
增强型材料由于其负泊松比所产生的特殊性能而具有很高的潜力。近年来,研究人员开发了几种增塑型聚合物基材料。事实上,一些应用正在寻求轻质(生产和运输中消耗的材料更少),同时具有高机械性能(冲击吸收、刚性、强度、阻力等)。因此,密度和韧性/强度之间的平衡是非常重要的,特别是在军事,体育和运输应用中。因此,增氧材料(特别是泡沫材料)可以在限制材料重量的同时提供高冲击保护。本文综述了生长型聚合物泡沫的最新进展,重点介绍了生长型聚合物泡沫的制备方法和加工条件(取决于细胞结构的性质),制备参数对其最终性能的影响,以及它们的模型和潜在应用。
{"title":"Auxetic Polymer Foams: Production, Modeling and Applications","authors":"Ouassim Hamdi, D. Rodrigue","doi":"10.2174/2452271604666211130123921","DOIUrl":"https://doi.org/10.2174/2452271604666211130123921","url":null,"abstract":"\u0000\u0000Auxetic materials have high potential due to their exceptional properties resulting from their negative Poisson ratio. Recently, several auxetic polymer-based materials have been developed. \u0000In fact, several applications are looking for a lightweight (less material consumed in production and transport) while having high mechanical performances (impact absorption, rigidity, strength, resistance, etc.). So, a balance between density and toughness/strength is of high importance, especially for military, sporting, and transport applications. So auxetic materials (especially foams) can provide high impact protection while limiting the material’s weight.\u0000\u0000This article presents a review of recent advances with a focus on auxetic polymers, with particular emphasis on the auxetic polymer foams in terms of their fabrication methods and processing conditions (depending on the nature of the cellular structure), the effect of the fabrication parameters on their final properties, as well as their models and potential applications.\u0000\u0000","PeriodicalId":10768,"journal":{"name":"Current Applied Polymer Science","volume":"16 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91269283","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
Er3+Incorporated Transparent Ternary Nanocomposite as Active Core Material in Polymer Optical Preform with Improved Photo-emission Performance Er3+加入透明三元纳米复合材料作为聚合物光学预制体的活性芯材,提高了光发射性能
Pub Date : 2021-11-30 DOI: 10.2174/2452271604666211130123241
Ipsita Chinya, R. Sen, A. Dhar
A polymer as a host in the optical waveguide has many advantages and, when doped with rare-earth (RE) elements, offers an efficient connection, compared to its glass-based counterparts as an amplifier. However, a polymer matrix causes the concentration quenching effect of REs in the polymer matrix, making the fabrication of RE-doped polymer waveguides more complicated as compared to the fabrication of glass-based complements. Moreover, controlling scattering loss at the particle-polymer interface for maintaining the optical clarity of the composite is also a great challenge.The main aim of the present study was to optimize the synthesis of Er2O3grafted Polymethylmethacrylate (PMMA)-Polystyrene (PS) composite based transparent ternary nanocomposite and its characterization to implement them as a potential material for active core in Polymer Optical Preform (POP). Nano Erbium Oxide (Er2O3) was successfully synthesized by the wet-chemical method and encapsulated by a polymerizable surfactant, i.e., 3-Methacyloxypropyltrimethoxy silane (MPS). The encapsulated nanoparticles were further subjected to grafting with PMMA using in-situ polymerization of methyl methacrylate (MMA) followed by blending with PS via solvent mixing technique. The optical transparency of the ternary composite was achieved by fine-tuning the diameter (15-20 nm) of the PMMA coated Er2O3. The crystallinity present in Er2O3 was significantly reduced after PMMA coating. The comparatively higher refractive index obtained at 589 nm wavelength for the synthesized material indicated its usability as active core material in the presence of a commercial acrylate cladding tube. A photoluminescence (Pl) study indicated that the technique might be used for a higher level of Er3+doping in polymer matrix without sacrificing its transparency. The obtained results indicated that the sample synthesized with the adopted technique gives better Pl intensity compared to the other methods of Er3+ incorporation in polymer optical preform (POP).
聚合物作为光波导的主体具有许多优点,当掺杂稀土(RE)元素时,与作为放大器的玻璃基对口物相比,它提供了高效的连接。然而,聚合物基体会导致稀土在聚合物基体中的浓度猝灭效应,使得稀土掺杂聚合物波导的制作比玻璃基补体的制作更加复杂。此外,控制颗粒-聚合物界面的散射损失以保持复合材料的光学清晰度也是一个很大的挑战。本研究的主要目的是优化er2o3接枝聚甲基丙烯酸甲酯(PMMA)-聚苯乙烯(PS)复合透明三元纳米复合材料的合成及其表征,以实现其作为聚合物光学预成型(POP)活性芯的潜在材料。采用湿化学法制备了纳米氧化铒(Er2O3),并用可聚合表面活性剂3-甲基氧基丙基三甲氧基硅烷(MPS)包封。将包被的纳米粒子通过原位聚合与PMMA接枝,然后通过溶剂混合技术与PS共混。三元复合材料的光学透明度是通过微调PMMA涂层Er2O3的直径(15-20 nm)来实现的。PMMA涂层后,Er2O3的结晶度明显降低。在589 nm波长处获得的相对较高的折射率表明,在商用丙烯酸酯包层管存在的情况下,该合成材料可作为活性芯材料。一项光致发光(Pl)研究表明,该技术可以在不牺牲其透明度的情况下在聚合物基体中掺杂更高水平的Er3+。实验结果表明,与其他掺杂Er3+的方法相比,采用该方法合成的样品具有更好的发光强度。
{"title":"Er3+Incorporated Transparent Ternary Nanocomposite as Active Core Material in Polymer Optical Preform with Improved Photo-emission Performance","authors":"Ipsita Chinya, R. Sen, A. Dhar","doi":"10.2174/2452271604666211130123241","DOIUrl":"https://doi.org/10.2174/2452271604666211130123241","url":null,"abstract":"\u0000\u0000 A polymer as a host in the optical waveguide has many advantages and, when doped with rare-earth (RE) elements, offers an efficient connection, compared to its glass-based counterparts as an amplifier. However, a polymer matrix causes the concentration quenching effect of REs in the polymer matrix, making the fabrication of RE-doped polymer waveguides more complicated as compared to the fabrication of glass-based complements. Moreover, controlling scattering loss at the particle-polymer interface for maintaining the optical clarity of the composite is also a great challenge.\u0000\u0000\u0000\u0000\u0000The main aim of the present study was to optimize the synthesis of Er2O3grafted Polymethylmethacrylate (PMMA)-Polystyrene (PS) composite based transparent ternary nanocomposite and its characterization to implement them as a potential material for active core in Polymer Optical Preform (POP). \u0000\u0000\u0000\u0000\u0000 Nano Erbium Oxide (Er2O3) was successfully synthesized by the wet-chemical method and encapsulated by a polymerizable surfactant, i.e., 3-Methacyloxypropyltrimethoxy silane (MPS). The encapsulated nanoparticles were further subjected to grafting with PMMA using in-situ polymerization of methyl methacrylate (MMA) followed by blending with PS via solvent mixing technique. \u0000\u0000\u0000\u0000\u0000 The optical transparency of the ternary composite was achieved by fine-tuning the diameter (15-20 nm) of the PMMA coated Er2O3. The crystallinity present in Er2O3 was significantly reduced after PMMA coating. The comparatively higher refractive index obtained at 589 nm wavelength for the synthesized material indicated its usability as active core material in the presence of a commercial acrylate cladding tube. A photoluminescence (Pl) study indicated that the technique might be used for a higher level of Er3+doping in polymer matrix without sacrificing its transparency. \u0000\u0000\u0000\u0000\u0000 The obtained results indicated that the sample synthesized with the adopted technique gives better Pl intensity compared to the other methods of Er3+ incorporation in polymer optical preform (POP).\u0000\u0000","PeriodicalId":10768,"journal":{"name":"Current Applied Polymer Science","volume":"39 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72626595","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Polymer nanofibers for biomedical applications: advances by electrospinning 高分子纳米纤维在生物医学上的应用:静电纺丝的进展
Pub Date : 2021-11-22 DOI: 10.2174/2452271604666211122122557
A. L. Toledo, Talita N. da Silva, Arianne C. dos S. Vaucher, Arthur H. V. Miranda, Gabriela C. C. Silva de Miranda, Maria Eduarda R. Vaz, Luísa Vieira da Silva, T. N. Barradas, Paulo H. S. Picciani
The demand for novel biomaterials has been exponentially rising in the last years as well as the searching for new technologies able to produce more efficient products in both drug delivery systems and regenerative medicine. Objective: The technique that can pretty well encompass the needs for novel and high-end materials with a relatively low-cost and easy operation is the electrospinning of polymer solutions. Electrospinning usually produces ultrathin fibers that can be applied in a myriad of biomedical devices including sustained delivery systems for drugs, proteins, biomolecules, hormones, etc that can be applied in a broad spectrum of applications, from transdermal patches to cancer-related drugs. Electrospun fibers can be produced to mimic certain tissues of the human body, being an option to create new scaffolds for implants with several advantages. In this review, we aimed to encompass the use of electrospun fibers in the field of biomedical devices, more specifically in the use of electrospun nanofibers applications toward the production of drug delivery systems and scaffolds for tissue regeneration.
在过去的几年里,对新型生物材料的需求呈指数级增长,同时也在寻找能够在药物输送系统和再生医学中生产更有效产品的新技术。目的:聚合物溶液静电纺丝技术是一种较好地满足新型高端材料需求、成本相对较低且操作简单的技术。静电纺丝通常生产超薄纤维,可应用于无数生物医学设备,包括药物、蛋白质、生物分子、激素等的持续输送系统,可应用于从透皮贴片到癌症相关药物的广泛应用。电纺丝纤维可以模仿人体的某些组织,作为一种选择,为植入物创造新的支架有几个优点。在这篇综述中,我们旨在涵盖电纺纤维在生物医学设备领域的应用,更具体地说,是电纺纳米纤维在生产药物输送系统和组织再生支架方面的应用。
{"title":"Polymer nanofibers for biomedical applications: advances by electrospinning","authors":"A. L. Toledo, Talita N. da Silva, Arianne C. dos S. Vaucher, Arthur H. V. Miranda, Gabriela C. C. Silva de Miranda, Maria Eduarda R. Vaz, Luísa Vieira da Silva, T. N. Barradas, Paulo H. S. Picciani","doi":"10.2174/2452271604666211122122557","DOIUrl":"https://doi.org/10.2174/2452271604666211122122557","url":null,"abstract":"\u0000\u0000The demand for novel biomaterials has been exponentially rising in the last years as well as the searching for new technologies able to produce more efficient products in both drug delivery systems and regenerative medicine. Objective: The technique that can pretty well encompass the needs for novel and high-end materials with a relatively low-cost and easy operation is the electrospinning of polymer solutions. \u0000\u0000\u0000\u0000\u0000Electrospinning usually produces ultrathin fibers that can be applied in a myriad of biomedical devices including sustained delivery systems for drugs, proteins, biomolecules, hormones, etc that can be applied in a broad spectrum of applications, from transdermal patches to cancer-related drugs. \u0000\u0000\u0000\u0000\u0000Electrospun fibers can be produced to mimic certain tissues of the human body, being an option to create new scaffolds for implants with several advantages. \u0000\u0000\u0000\u0000\u0000In this review, we aimed to encompass the use of electrospun fibers in the field of biomedical devices, more specifically in the use of electrospun nanofibers applications toward the production of drug delivery systems and scaffolds for tissue regeneration.\u0000\u0000","PeriodicalId":10768,"journal":{"name":"Current Applied Polymer Science","volume":"22 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85267075","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Effect of Functionality of Organophosphorus Flame Retardants on Flammability and Thermal Stability of DGEBA-Based Epoxy Resin Nanocomposites 有机磷阻燃剂的官能性对dgeba基环氧树脂纳米复合材料可燃性和热稳定性的影响
Pub Date : 2021-11-04 DOI: 10.2174/2452271604666211104091336
Priyanka Bazzad, J. B. Dahiyab
Epoxy resins have been extensively used in fire hazard environments, such as printed circuit boards, electrical isolation materials, adhesives, construction, and transportation due to their economically viable, simple processing. Therefore, the development of thermally stable and flame-retardant epoxy resin systems is essential.The aim of the present study was to study the effect of the functionality of organophosphorus flame retardants on DGEBA-based epoxy resin nanocomposites on thermal stability and flame retardancy. DGEBA (diglycidyl ether of bisphenol-A)-based epoxy resin nanocomposites having 2.0 wt% phosphorus were prepared with organophosphorus flame retardants with different functionalities by using an in-situ polymerization method. The flame retardant compounds uni-functional 9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) and bi-functional 2-(6-oxid-6H-dibenz [c, e] [1, 2] oxaphosphorin 6-yl) 1, 4-benzenediol (DOPO-HQ) were prepared. The thermal behavior of composites was studied by TG and DTA techniques. The flammability behavior was investigated by UL-94 and limiting oxygen index (LOI) tests.The XRD and TEM results showed the mixed dispersion of nanoclay platelets in an epoxy matrix. The thermal stability of the epoxy composite (EPDOPO-HQ) containing bi-functional DOPO-HQ is increased by 16 oC in comparison to the epoxy composite (EPDOPO) containing uni-functional DOPO. According to the TG analysis, the addition of nanoclay was observed to be more effective and synergistic with bi-functional DOPO-HQ as the EPDOPO-HQ/NC sample gains more resistance to degradation after around 450 oC and also gave rise to a high char yield. Epoxy resin samples containing reactive flame retardants gave UL-94 V-0 rating, but further addition of 2.0 wt% nanoclay lowered the rating from V-0 to V-1. TG analysis of the epoxy composite samples showed that the addition of nanoclay were observed to be synergistic with bi-functional flame retardant (DOPO-HQ) as the EPDOPO-HQ/NC sample gained more resistance to degradation after around 450 oC due to the formation of mixed intercalated and exfoliated structure. The EPDOPO-HQ sample gave a high char yield with increased onset degradation temperature, high thermal stability as well as high flame retardancy.
环氧树脂由于其经济可行,加工简单,已广泛用于火灾危险环境,如印刷电路板,电气隔离材料,粘合剂,建筑和运输。因此,开发热稳定、阻燃的环氧树脂体系至关重要。本研究的目的是研究有机磷阻燃剂在dgeba基环氧树脂纳米复合材料上的功能对其热稳定性和阻燃性的影响。采用原位聚合法制备了磷含量为2.0 wt%的双酚二缩水甘油酯基环氧树脂纳米复合材料。制备了单官能团9,10 -二氢-9-氧-10-磷菲-10-氧化物(DOPO)和双官能团2-(6-氧- 6h -二苯并[c, e][1,2]磷-6 -基)1,4 -苯二醇(DOPO- hq)阻燃化合物。采用热重分析(TG)和差热分析(DTA)技术研究了复合材料的热行为。通过UL-94和极限氧指数(LOI)测试考察了材料的可燃性。XRD和TEM结果表明,纳米粘土薄片在环氧基体中呈混合分散状态。含有双官能团DOPO- hq的环氧复合材料(EPDOPO- hq)的热稳定性比含有单官能团DOPO的环氧复合材料(EPDOPO)提高了16℃。根据热重分析,纳米粘土的加入与双功能DOPO-HQ更有效,协同作用更强,因为EPDOPO-HQ/NC样品在450℃左右后具有更强的抗降解能力,并且碳产量也更高。含有反应性阻燃剂的环氧树脂样品使UL-94的V-0等级,但进一步添加2.0 wt%的纳米粘土将等级从V-0降低到V-1。对环氧复合材料的热重分析表明,纳米粘土的加入与双功能阻燃剂(DOPO-HQ)具有协同作用,EPDOPO-HQ/NC样品在450℃左右后形成混合插层和剥离结构,具有更强的抗降解能力。EPDOPO-HQ样品炭产率高,起始降解温度高,热稳定性好,阻燃性好。
{"title":"Effect of Functionality of Organophosphorus Flame Retardants on Flammability and Thermal Stability of DGEBA-Based Epoxy Resin Nanocomposites","authors":"Priyanka Bazzad, J. B. Dahiyab","doi":"10.2174/2452271604666211104091336","DOIUrl":"https://doi.org/10.2174/2452271604666211104091336","url":null,"abstract":"\u0000\u0000Epoxy resins have been extensively used in fire hazard environments, such as printed circuit boards, electrical isolation materials, adhesives, construction, and transportation due to their economically viable, simple processing. Therefore, the development of thermally stable and flame-retardant epoxy resin systems is essential.\u0000\u0000\u0000\u0000\u0000The aim of the present study was to study the effect of the functionality of organophosphorus flame retardants on DGEBA-based epoxy resin nanocomposites on thermal stability and flame retardancy. \u0000\u0000\u0000\u0000\u0000DGEBA (diglycidyl ether of bisphenol-A)-based epoxy resin nanocomposites having 2.0 wt% phosphorus were prepared with organophosphorus flame retardants with different functionalities by using an in-situ polymerization method. The flame retardant compounds uni-functional 9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) and bi-functional 2-(6-oxid-6H-dibenz [c, e] [1, 2] oxaphosphorin 6-yl) 1, 4-benzenediol (DOPO-HQ) were prepared. The thermal behavior of composites was studied by TG and DTA techniques. The flammability behavior was investigated by UL-94 and limiting oxygen index (LOI) tests.\u0000\u0000\u0000\u0000\u0000The XRD and TEM results showed the mixed dispersion of nanoclay platelets in an epoxy matrix. The thermal stability of the epoxy composite (EPDOPO-HQ) containing bi-functional DOPO-HQ is increased by 16 oC in comparison to the epoxy composite (EPDOPO) containing uni-functional DOPO. According to the TG analysis, the addition of nanoclay was observed to be more effective and synergistic with bi-functional DOPO-HQ as the EPDOPO-HQ/NC sample gains more resistance to degradation after around 450 oC and also gave rise to a high char yield. Epoxy resin samples containing reactive flame retardants gave UL-94 V-0 rating, but further addition of 2.0 wt% nanoclay lowered the rating from V-0 to V-1. \u0000\u0000\u0000\u0000\u0000TG analysis of the epoxy composite samples showed that the addition of nanoclay were observed to be synergistic with bi-functional flame retardant (DOPO-HQ) as the EPDOPO-HQ/NC sample gained more resistance to degradation after around 450 oC due to the formation of mixed intercalated and exfoliated structure. The EPDOPO-HQ sample gave a high char yield with increased onset degradation temperature, high thermal stability as well as high flame retardancy.\u0000\u0000","PeriodicalId":10768,"journal":{"name":"Current Applied Polymer Science","volume":"17 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87480902","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Self-healing organic coatings based on microcapsules – A patent-based review 基于微胶囊的自修复有机涂层——专利综述
Pub Date : 2021-09-13 DOI: 10.2174/2452271604666210913103301
Diego Moreira Schlemper, S. Pezzin
Self-healing coatings are intended to increase long-term durability and reliability and can be enabled by the presence of microcapsules containing a self-healing agent capable of interacting with the matrix and regenerating the system. This review article provides an overview of the state-of-the-art, focusing on the patents published in the field of microcapsule-based self-healing organic coatings, since the early 2000’s. A discussion about coatings for corrosion protection and the different self-healing approaches and mechanisms are also addressed, as well as future challenges and expectations for this kind of coatings.
自修复涂层旨在提高长期耐久性和可靠性,并且可以通过含有能够与基质相互作用并使系统再生的自修复剂的微胶囊来实现。本文综述了自21世纪初以来,微胶囊自修复有机涂层领域的最新进展,重点介绍了已发表的专利。讨论了不同的自修复方法和机制,以及未来的挑战和对这类涂层的期望。
{"title":"Self-healing organic coatings based on microcapsules – A patent-based review","authors":"Diego Moreira Schlemper, S. Pezzin","doi":"10.2174/2452271604666210913103301","DOIUrl":"https://doi.org/10.2174/2452271604666210913103301","url":null,"abstract":"\u0000\u0000Self-healing coatings are intended to increase long-term durability and reliability and can be enabled by the presence of microcapsules containing a self-healing agent capable of interacting with the matrix and regenerating the system. This review article provides an overview of the state-of-the-art, focusing on the patents published in the field of microcapsule-based self-healing organic coatings, since the early 2000’s. A discussion about coatings for corrosion protection and the different self-healing approaches and mechanisms are also addressed, as well as future challenges and expectations for this kind of coatings.\u0000","PeriodicalId":10768,"journal":{"name":"Current Applied Polymer Science","volume":"77 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78649560","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Investigation of artificial ageing of PVC stabilized with epoxidized sunflower oil as biobased derivative 以环氧葵花籽油为生物基衍生物稳定聚氯乙烯的人工老化研究
Pub Date : 2021-08-20 DOI: 10.2174/2452271604666210820093434
N. Gallouze, Naima Belhaneche-Bensemrab, S. Commereuc, V. Verney
The objective of this work is the study of artificial ageing of semi-rigid and plasticized polyvinyl chloride (PVC) stabilized with epoxidized sunflower oil (ESO) as biobased derivative in combination with zinc and calcium stearates. For comparison, a formulation of PVC plasticized and stabilized with epoxidized soya bean oil (ESBO) was considered. Artificial ageing was carried out during the 304 hours. Samples were taken off after: 48, 146, 234 and 304 hours and then characterized. The evolution of density, glass transition temperature and morphology, was followed as a function of the time. The structural modifications of polymer were analyzed by Fourier transform infrared spectroscopy in attenuated total reflectance and transmission modes. The results showed a little decrease of density, a considerable increase of the glass transition temperatures values and a change of morphology. All changes in the properties of PVC relate to formation of new chemical structures.Globally, it was found that ESO exhibited similar performances to those of ESBO
本研究的目的是研究半刚性和增塑型聚氯乙烯(PVC)的人工老化,该聚氯乙烯是由环氧化葵花籽油(ESO)作为生物基衍生物与锌和硬脂酸钙结合稳定的。为了比较,考虑了用环氧大豆油(ESBO)增塑和稳定PVC的配方。在304小时内进行了人工老化。分别在48、146、234和304小时后取下样品进行表征。密度、玻璃化转变温度和形貌随时间的变化而变化。利用傅里叶变换红外光谱分析了聚合物在衰减全反射和透射模式下的结构修饰。结果表明:密度略有下降,玻璃化转变温度值明显升高,形貌发生变化。PVC性能的一切变化都与新化学结构的形成有关。在全球范围内,ESO与ESBO表现相似
{"title":"Investigation of artificial ageing of PVC stabilized with epoxidized sunflower oil as biobased derivative","authors":"N. Gallouze, Naima Belhaneche-Bensemrab, S. Commereuc, V. Verney","doi":"10.2174/2452271604666210820093434","DOIUrl":"https://doi.org/10.2174/2452271604666210820093434","url":null,"abstract":"\u0000\u0000The objective of this work is the study of artificial ageing of semi-rigid and plasticized polyvinyl chloride (PVC) stabilized with epoxidized sunflower oil (ESO) as biobased derivative in combination with zinc and calcium stearates. \u0000\u0000\u0000\u0000For comparison, a formulation of PVC plasticized and stabilized with epoxidized soya bean oil (ESBO) was considered. Artificial ageing was carried out during the 304 hours. Samples were taken off after: 48, 146, 234 and 304 hours and then characterized. The evolution of density, glass transition temperature and morphology, was followed as a function of the time. The structural modifications of polymer were analyzed by Fourier transform infrared spectroscopy in attenuated total reflectance and transmission modes. \u0000\u0000\u0000\u0000The results showed a little decrease of density, a considerable increase of the glass transition temperatures values and a change of morphology. All changes in the properties of PVC relate to formation of new chemical structures.\u0000\u0000\u0000\u0000Globally, it was found that ESO exhibited similar performances to those of ESBO \u0000","PeriodicalId":10768,"journal":{"name":"Current Applied Polymer Science","volume":"98 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81029792","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Meet the Editorial Board Member 与编辑委员会成员见面
Pub Date : 2021-08-01 DOI: 10.2174/245227160402211118121133
M. Rocco
R. Gangaraju received a Ph.D. in Molecular Biology with a wealth of experience in preclinical pharmacology, animal model development and drug discovery with specific training and expertise in key research areas including signal transduction pathways in mesenchymal stem cells and endothelial cells. His laboratory focuses on the neurovascular unit (NVU) of the retina in health and disease. They primarily utilize preclinical in vitro and in vivo models to investigate the potential of their findings for clinical translation, with the long-term goal of advancing the clinical management of diabetic retinopathy, age-related macular degeneration and visual deficits of traumatic brain injury. He serves as the Chairman of the Scientific Advisory Board. His successful collaborations led to several peer-reviewed publications, conference abstracts and patent applications for each project. He also served as the reviewer of several biomedical journals and grant agencies including UK Diabetes and DoD.
Gangaraju博士获得分子生物学博士学位,在临床前药理学,动物模型开发和药物发现方面拥有丰富的经验,并在间充质干细胞和内皮细胞的信号转导途径等关键研究领域接受过特殊培训和专业知识。他的实验室主要研究视网膜的神经血管单元(NVU)在健康和疾病中的作用。他们主要利用临床前体外和体内模型来研究他们的发现在临床转化中的潜力,其长期目标是推进糖尿病视网膜病变、年龄相关性黄斑变性和创伤性脑损伤视力缺陷的临床管理。他担任科学顾问委员会主席。他的成功合作导致了几个同行评审的出版物,会议摘要和专利申请的每个项目。他还担任多家生物医学期刊和资助机构的审稿人,包括英国糖尿病和国防部。
{"title":"Meet the Editorial Board Member","authors":"M. Rocco","doi":"10.2174/245227160402211118121133","DOIUrl":"https://doi.org/10.2174/245227160402211118121133","url":null,"abstract":"R. Gangaraju received a Ph.D. in Molecular Biology with a wealth of experience in preclinical pharmacology, animal model development and drug discovery with specific training and expertise in key research areas including signal transduction pathways in mesenchymal stem cells and endothelial cells. His laboratory focuses on the neurovascular unit (NVU) of the retina in health and disease. They primarily utilize preclinical in vitro and in vivo models to investigate the potential of their findings for clinical translation, with the long-term goal of advancing the clinical management of diabetic retinopathy, age-related macular degeneration and visual deficits of traumatic brain injury. He serves as the Chairman of the Scientific Advisory Board. His successful collaborations led to several peer-reviewed publications, conference abstracts and patent applications for each project. He also served as the reviewer of several biomedical journals and grant agencies including UK Diabetes and DoD.","PeriodicalId":10768,"journal":{"name":"Current Applied Polymer Science","volume":"52 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88325986","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Scaffolds Designing from Protein-loadable Coaxial Electrospun Fibermats of poly(acrylamide)-co-poly(diacetone acrylamide) and Gelatin 用可载蛋白的同轴静电纺丝聚丙烯酰胺-共聚二丙酮丙烯酰胺和明胶纤维设计支架
Pub Date : 2021-07-16 DOI: 10.2174/2452271604666210716143235
Yuji Tanikawa, A. Obata, K. Nagata, T. Kasuga, T. Mizuno
A core-shell fiber mat is one of the attractive platforms for this purpose. However, very few details the importance of choosing the suitable material for the shell units that can endow efficient release properties. The tailored design of cytokine-releasing scaffolds aiming at in situ regenerative therapy is still one of the crucial issues to be studied. In this study, we characterized the effectiveness of core-shell fiber mats that possess cross-linked gelatin (CLG) as the shell layer of constituent nanofibers, as a protein-releasing cell-incubation scaffold.We utilized a crosslinked copolymer of poly (acrylamide)-co-poly (diacetone acrylamide) (poly (AM/DAAM)) and adipic acid dihydrazide (ADH), poly (AM/DAAM)/ADH for the core nanofibers in the core-shell fiber mats. By coaxial electrospinning and the subsequent crosslinking of the gelatin layer, we successfully constructed core-shell fiber mats consisting of double-layered nanofibers of poly (AM/DAAM)/ADH and CLG. Using fluorescein isothiocyanate-labeled lysozyme (FITC-Lys) as a dummy guest protein, we characterized the release behavior of the core-shell fiber mats containing a CLG layer. Upon loading essential fibroblast growth factor (bFGF) as cargo in our fiber mats, we also characterized the impacts of the released bFGF on the proliferation of the incubated cells.Although the single-layered poly (AM/DAAM)/ADH nanofiber fiber mats did not adhere to the mammalian cells, the core-shell fiber mat with the CLG shell layer exhibited good adherence and subsequent proliferation. A sustained release of the preloaded FITC-Lys over 24 days without any burst release was observed, and the cumulative amount of released protein reached over 65% after 24 days. Upon loading bFGF in our fiber mats, we succeeded in promoting cell proliferation and highlighting its potential for therapeutic applications.We successfully confirmed that core-shell fiber mats with a CLG shell layer around the constituent nanofibers were practical as protein-releasing cell-incubation scaffolds.
芯壳纤维垫是实现这一目的的有吸引力的平台之一。然而,很少有人详细说明为外壳单元选择合适的材料的重要性,这些材料可以赋予有效的释放特性。针对原位再生治疗的细胞因子释放支架的定制设计仍然是需要研究的关键问题之一。在这项研究中,我们表征了具有交联明胶(CLG)作为组成纳米纤维的外壳层的核壳纤维垫作为蛋白质释放细胞培养支架的有效性。我们利用聚(丙烯酰胺)-共聚(二丙酮丙烯酰胺)(聚(AM/DAAM))和己二酸二肼(ADH)的交联共聚物,聚(AM/DAAM)/ADH作为芯壳纤维垫的核心纳米纤维。通过同轴静电纺丝和随后的明胶层交联,我们成功地构建了由聚(AM/DAAM)/ADH和CLG双层纳米纤维组成的核壳纤维垫。利用异硫氰酸荧光素标记溶菌酶(FITC-Lys)作为假靶蛋白,我们表征了含有CLG层的核壳纤维垫的释放行为。在我们的纤维垫中装载必需成纤维细胞生长因子(bFGF)作为货物后,我们还表征了释放的bFGF对培养细胞增殖的影响。虽然单层聚(AM/DAAM)/ADH纳米纤维垫不粘附在哺乳动物细胞上,但具有CLG壳层的核壳纤维垫具有良好的粘附性和随后的增殖能力。预加载的FITC-Lys在24天内持续释放,无任何爆发性释放,24天后累计释放蛋白量达到65%以上。在我们的纤维垫中加载bFGF后,我们成功地促进了细胞增殖,并突出了其治疗应用的潜力。我们成功地证实了在组成纳米纤维周围有CLG壳层的核壳纤维垫是实用的蛋白质释放细胞培养支架。
{"title":"Scaffolds Designing from Protein-loadable Coaxial Electrospun Fibermats of poly(acrylamide)-co-poly(diacetone acrylamide) and Gelatin","authors":"Yuji Tanikawa, A. Obata, K. Nagata, T. Kasuga, T. Mizuno","doi":"10.2174/2452271604666210716143235","DOIUrl":"https://doi.org/10.2174/2452271604666210716143235","url":null,"abstract":"\u0000\u0000A core-shell fiber mat is one of the attractive platforms for this purpose. However, very few details the importance of choosing the suitable material for the shell units that can endow efficient release properties. The tailored design of cytokine-releasing scaffolds aiming at in situ regenerative therapy is still one of the crucial issues to be studied. \u0000\u0000\u0000\u0000In this study, we characterized the effectiveness of core-shell fiber mats that possess cross-linked gelatin (CLG) as the shell layer of constituent nanofibers, as a protein-releasing cell-incubation scaffold.\u0000\u0000\u0000\u0000We utilized a crosslinked copolymer of poly (acrylamide)-co-poly (diacetone acrylamide) (poly (AM/DAAM)) and adipic acid dihydrazide (ADH), poly (AM/DAAM)/ADH for the core nanofibers in the core-shell fiber mats. By coaxial electrospinning and the subsequent crosslinking of the gelatin layer, we successfully constructed core-shell fiber mats consisting of double-layered nanofibers of poly (AM/DAAM)/ADH and CLG. Using fluorescein isothiocyanate-labeled lysozyme (FITC-Lys) as a dummy guest protein, we characterized the release behavior of the core-shell fiber mats containing a CLG layer. Upon loading essential fibroblast growth factor (bFGF) as cargo in our fiber mats, we also characterized the impacts of the released bFGF on the proliferation of the incubated cells.\u0000\u0000\u0000\u0000Although the single-layered poly (AM/DAAM)/ADH nanofiber fiber mats did not adhere to the mammalian cells, the core-shell fiber mat with the CLG shell layer exhibited good adherence and subsequent proliferation. A sustained release of the preloaded FITC-Lys over 24 days without any burst release was observed, and the cumulative amount of released protein reached over 65% after 24 days. Upon loading bFGF in our fiber mats, we succeeded in promoting cell proliferation and highlighting its potential for therapeutic applications.\u0000\u0000\u0000\u0000We successfully confirmed that core-shell fiber mats with a CLG shell layer around the constituent nanofibers were practical as protein-releasing cell-incubation scaffolds.\u0000","PeriodicalId":10768,"journal":{"name":"Current Applied Polymer Science","volume":"279 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81242037","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Meet Our Editor-in-Chief 认识我们的主编
Pub Date : 2021-03-05 DOI: 10.2174/245227160401210204124812
F. G. Souza
{"title":"Meet Our Editor-in-Chief","authors":"F. G. Souza","doi":"10.2174/245227160401210204124812","DOIUrl":"https://doi.org/10.2174/245227160401210204124812","url":null,"abstract":"<jats:sec>\u0000<jats:title />\u0000<jats:p />\u0000</jats:sec>","PeriodicalId":10768,"journal":{"name":"Current Applied Polymer Science","volume":"81 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85787925","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
期刊
Current Applied Polymer Science
全部 Acc. Chem. Res. ACS Applied Bio Materials ACS Appl. Electron. Mater. ACS Appl. Energy Mater. ACS Appl. Mater. Interfaces ACS Appl. Nano Mater. ACS Appl. Polym. Mater. ACS BIOMATER-SCI ENG ACS Catal. ACS Cent. Sci. ACS Chem. Biol. ACS Chemical Health & Safety ACS Chem. Neurosci. ACS Comb. Sci. ACS Earth Space Chem. ACS Energy Lett. ACS Infect. Dis. ACS Macro Lett. ACS Mater. Lett. ACS Med. Chem. Lett. ACS Nano ACS Omega ACS Photonics ACS Sens. ACS Sustainable Chem. Eng. ACS Synth. Biol. Anal. Chem. BIOCHEMISTRY-US Bioconjugate Chem. BIOMACROMOLECULES Chem. Res. Toxicol. Chem. Rev. Chem. Mater. CRYST GROWTH DES ENERG FUEL Environ. Sci. Technol. Environ. Sci. Technol. Lett. Eur. J. Inorg. Chem. IND ENG CHEM RES Inorg. Chem. J. Agric. Food. Chem. J. Chem. Eng. Data J. Chem. Educ. J. Chem. Inf. Model. J. Chem. Theory Comput. J. Med. Chem. J. Nat. Prod. J PROTEOME RES J. Am. Chem. Soc. LANGMUIR MACROMOLECULES Mol. Pharmaceutics Nano Lett. Org. Lett. ORG PROCESS RES DEV ORGANOMETALLICS J. Org. Chem. J. Phys. Chem. J. Phys. Chem. A J. Phys. Chem. B J. Phys. Chem. C J. Phys. Chem. Lett. Analyst Anal. Methods Biomater. Sci. Catal. Sci. Technol. Chem. Commun. Chem. Soc. Rev. CHEM EDUC RES PRACT CRYSTENGCOMM Dalton Trans. Energy Environ. Sci. ENVIRON SCI-NANO ENVIRON SCI-PROC IMP ENVIRON SCI-WAT RES Faraday Discuss. Food Funct. Green Chem. Inorg. Chem. Front. Integr. Biol. J. Anal. At. Spectrom. J. Mater. Chem. A J. Mater. Chem. B J. Mater. Chem. C Lab Chip Mater. Chem. Front. Mater. Horiz. MEDCHEMCOMM Metallomics Mol. Biosyst. Mol. Syst. Des. Eng. Nanoscale Nanoscale Horiz. Nat. Prod. Rep. New J. Chem. Org. Biomol. Chem. Org. Chem. Front. PHOTOCH PHOTOBIO SCI PCCP Polym. Chem.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术
文献互助 智能选刊 最新文献 互助须知 联系我们:info@booksci.cn
Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。
Copyright © 2023 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1