Pub Date : 2022-01-02DOI: 10.1080/19475411.2022.2027548
Huanyu Yang, Ying Huang, Zhi Zhou, J. Ou
ABSTRACT To investigate the long-term performance of the packaged fiber Bragg grating (FBG) sensors embedded in civil infrastructure for strain monitoring, in this paper, the influence of host matrix’s creep effect on the behavior of the FBG sensors was systematically studied through theoretical, numerical, and experimental analysis. A theoretical strain transfer analysis between the optic fiber, packaging layer, and host matrix to consider the creep effect of the host matrix was performed accordingly for long-term strain monitoring. Parametric studies were carried out using numerical analysis for FBG sensors packaged with glass fiber reinforced plastic (GFRP), also known as FBG-GFRP sensors in concrete, as an example. The results show that embedded in a creep medium, an acceptable long-term performance of packaged FBG sensors requires the packaging layer to have a minimum length and maximum thickness. Laboratory long-term creep tests using epoxy resin and concrete as host matrix for FBG-GFRP sensors also clearly demonstrated that the influence of creep effect cannot be ignored for strain measurements if the host matrix has a creep potential and the developed correction model performed well to reduce measurement errors of such sensors in creep medium.
{"title":"Long-term performance of packaged fiber Bragg grating sensors for strain monitoring inside creep medium","authors":"Huanyu Yang, Ying Huang, Zhi Zhou, J. Ou","doi":"10.1080/19475411.2022.2027548","DOIUrl":"https://doi.org/10.1080/19475411.2022.2027548","url":null,"abstract":"ABSTRACT To investigate the long-term performance of the packaged fiber Bragg grating (FBG) sensors embedded in civil infrastructure for strain monitoring, in this paper, the influence of host matrix’s creep effect on the behavior of the FBG sensors was systematically studied through theoretical, numerical, and experimental analysis. A theoretical strain transfer analysis between the optic fiber, packaging layer, and host matrix to consider the creep effect of the host matrix was performed accordingly for long-term strain monitoring. Parametric studies were carried out using numerical analysis for FBG sensors packaged with glass fiber reinforced plastic (GFRP), also known as FBG-GFRP sensors in concrete, as an example. The results show that embedded in a creep medium, an acceptable long-term performance of packaged FBG sensors requires the packaging layer to have a minimum length and maximum thickness. Laboratory long-term creep tests using epoxy resin and concrete as host matrix for FBG-GFRP sensors also clearly demonstrated that the influence of creep effect cannot be ignored for strain measurements if the host matrix has a creep potential and the developed correction model performed well to reduce measurement errors of such sensors in creep medium.","PeriodicalId":48516,"journal":{"name":"International Journal of Smart and Nano Materials","volume":"13 1","pages":"42 - 63"},"PeriodicalIF":3.9,"publicationDate":"2022-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45276801","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-01-02DOI: 10.1080/19475411.2022.2051640
Qiangqiang Zhang, J. Dong, Yantang Zhao, Yueyan Zheng
ABSTRACT Artificial metamaterials have attracted widespread attention of research communities due to their anomalous physical properties compared to those of conventional materials. In this study, we designed a three-dimensional (3D) lightweight meta-architecture consisting of 6-connected anti-chiral honeycombs. The mechanical properties (e.g. Young’s modulus, compression strength, and Poisson’s ratio) of the proposed meta-architecture could be programmed by adjusting a series of geometric parameters, as shown through numerical simulations. Moreover, an optically sensitive polymer-based 3D meta-architecture with 6-connected anti-chiral features was constructed by the stereolithography method. Owing to the regulation of the negative Poisson’s ratio, 3D meta-architecture achieved a greater ductility under compression than those of traditional truss structures while retaining a relatively high strength and low density. Compression experiments validated the excellent tunability of the mechanical properties of the proposed 3D 6-connected anti-chiral structure. The results suggest the promising applications of this structure in lightweight aircraft, vibration isolation, and mechanical sensors Graphical Abstract
{"title":"Three-dimensional meta-architecture with programmable mechanical properties","authors":"Qiangqiang Zhang, J. Dong, Yantang Zhao, Yueyan Zheng","doi":"10.1080/19475411.2022.2051640","DOIUrl":"https://doi.org/10.1080/19475411.2022.2051640","url":null,"abstract":"ABSTRACT Artificial metamaterials have attracted widespread attention of research communities due to their anomalous physical properties compared to those of conventional materials. In this study, we designed a three-dimensional (3D) lightweight meta-architecture consisting of 6-connected anti-chiral honeycombs. The mechanical properties (e.g. Young’s modulus, compression strength, and Poisson’s ratio) of the proposed meta-architecture could be programmed by adjusting a series of geometric parameters, as shown through numerical simulations. Moreover, an optically sensitive polymer-based 3D meta-architecture with 6-connected anti-chiral features was constructed by the stereolithography method. Owing to the regulation of the negative Poisson’s ratio, 3D meta-architecture achieved a greater ductility under compression than those of traditional truss structures while retaining a relatively high strength and low density. Compression experiments validated the excellent tunability of the mechanical properties of the proposed 3D 6-connected anti-chiral structure. The results suggest the promising applications of this structure in lightweight aircraft, vibration isolation, and mechanical sensors Graphical Abstract","PeriodicalId":48516,"journal":{"name":"International Journal of Smart and Nano Materials","volume":"13 1","pages":"152 - 165"},"PeriodicalIF":3.9,"publicationDate":"2022-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47949325","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-01-02DOI: 10.1080/19475411.2022.2042423
Yafei Pan, Lei Huang, Jiuxing Zhang, Yong Du, F. Luo
ABSTRACT B x C-TiB2 ceramic composites were fabricated via reactive spark plasma sintering using TiC and B as the raw materials. The impact of B/TiC mole ratios on the phase compositions, densification behaviors, microstructure, and mechanical properties of the ceramic composites were investigated. The results showed that the stoichiometry of ‘B x C’ could be tailored by changing initial boron content and the obtained B4.5C, B6.5C and B8.5C phases have the same crystal structure (R-3 m). The excess of B enhanced the reaction between TiC and B, which released a large amount of hot energy and promoted the densification of the composites. The TB8.5 composite sintered at 1900°C had the best comprehensive mechanical properties, with hardness and flexural strength of 40.36 GPa and 551 MPa, respectively. The formation of nano-sized TiB2 grains induced by reaction were beneficial for improving the mechanical properties of these composites. Graphical abstract
摘要以TiC和B为原料，采用反应火花等离子烧结法制备了B×C-TiB2陶瓷复合材料。研究了B/TiC摩尔比对陶瓷复合材料相组成、致密化行为、微观结构和力学性能的影响。结果表明，可以通过改变初始硼含量来调整“B x C”的化学计量，得到的B4.5C、B6.5C和B8.5C相具有相同的晶体结构（R-3m）。过量的B增强了TiC和B之间的反应，释放了大量的热能，促进了复合材料的致密化。在1900°C下烧结的TB8.5复合材料具有最佳的综合力学性能，硬度和弯曲强度分别为40.36GPa和551MPa。反应诱导纳米TiB2晶粒的形成有利于提高复合材料的力学性能。图形摘要
{"title":"Effects of boron content on the microstructure and properties of B x C-TiB2 (x=4.5, 6.5 or 8.5) ceramic composites by the reactive spark plasma sintering","authors":"Yafei Pan, Lei Huang, Jiuxing Zhang, Yong Du, F. Luo","doi":"10.1080/19475411.2022.2042423","DOIUrl":"https://doi.org/10.1080/19475411.2022.2042423","url":null,"abstract":"ABSTRACT B x C-TiB2 ceramic composites were fabricated via reactive spark plasma sintering using TiC and B as the raw materials. The impact of B/TiC mole ratios on the phase compositions, densification behaviors, microstructure, and mechanical properties of the ceramic composites were investigated. The results showed that the stoichiometry of ‘B x C’ could be tailored by changing initial boron content and the obtained B4.5C, B6.5C and B8.5C phases have the same crystal structure (R-3 m). The excess of B enhanced the reaction between TiC and B, which released a large amount of hot energy and promoted the densification of the composites. The TB8.5 composite sintered at 1900°C had the best comprehensive mechanical properties, with hardness and flexural strength of 40.36 GPa and 551 MPa, respectively. The formation of nano-sized TiB2 grains induced by reaction were beneficial for improving the mechanical properties of these composites. Graphical abstract","PeriodicalId":48516,"journal":{"name":"International Journal of Smart and Nano Materials","volume":"13 1","pages":"100 - 113"},"PeriodicalIF":3.9,"publicationDate":"2022-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42852367","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
ABSTRACT Here, the effects of compatibilization and clay nanoparticles on the gas permeability of nanocomposites of poly-lactic acid (PLA)/thermoplastic starch (TPS)/nanoclay were discussed. TPS and compatibilized PLA/TPS were tailored in the first step. The starch with D-sorbitol as a plasticizer was mingled through the internal mixer. Afterward, the maleination method was utilized on PLA to ameliorate the compatibilization of PLA and TPS. In this regard, maleic anhydrate (MA) has been grafted on PLA in the presence of L101 as a peroxide initiator via melt mixing to obtain PLA-g-MA. The optimum content of PLA-g-MA was about 4 phr, confirmed by DMTA and SEM. Noteworthy, the presence of PLA-g-MA has moderately improved the oxygen barrier. Then, the nanocomposites of PLA and TPS containing 1% of Cloisite-30B as well as the optimum compatibilizer (4phr), were produced by melt mixing in the masterbatch module leading to the formation of an extraordinary well-dispersed structure according to XRD patterns. The mixing order controlled the localization of nanosheets. It was concluded that the inclusion of 1% nanoclay in the PLA phase reduces the oxygen permeability by 55% compared to the pristine blend due to the tortuosity effect of nanosheets that are appropriately dispersed in the matrix. Graphical Abstract
{"title":"Compatibilization of PLA grafted maleic anhydrate through blending of thermoplastic starch (TPS) and nanoclay nanocomposites for the reduction of gas permeability","authors":"Niloofar Alikarami, Mahbod Abrisham, Xiayan Huang, Mahyar Panahi-Sarmad, Kanglei Zhang, Ke Dong, Xueliang Xiao","doi":"10.1080/19475411.2022.2051639","DOIUrl":"https://doi.org/10.1080/19475411.2022.2051639","url":null,"abstract":"ABSTRACT Here, the effects of compatibilization and clay nanoparticles on the gas permeability of nanocomposites of poly-lactic acid (PLA)/thermoplastic starch (TPS)/nanoclay were discussed. TPS and compatibilized PLA/TPS were tailored in the first step. The starch with D-sorbitol as a plasticizer was mingled through the internal mixer. Afterward, the maleination method was utilized on PLA to ameliorate the compatibilization of PLA and TPS. In this regard, maleic anhydrate (MA) has been grafted on PLA in the presence of L101 as a peroxide initiator via melt mixing to obtain PLA-g-MA. The optimum content of PLA-g-MA was about 4 phr, confirmed by DMTA and SEM. Noteworthy, the presence of PLA-g-MA has moderately improved the oxygen barrier. Then, the nanocomposites of PLA and TPS containing 1% of Cloisite-30B as well as the optimum compatibilizer (4phr), were produced by melt mixing in the masterbatch module leading to the formation of an extraordinary well-dispersed structure according to XRD patterns. The mixing order controlled the localization of nanosheets. It was concluded that the inclusion of 1% nanoclay in the PLA phase reduces the oxygen permeability by 55% compared to the pristine blend due to the tortuosity effect of nanosheets that are appropriately dispersed in the matrix. Graphical Abstract","PeriodicalId":48516,"journal":{"name":"International Journal of Smart and Nano Materials","volume":"13 1","pages":"130 - 151"},"PeriodicalIF":3.9,"publicationDate":"2022-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43573950","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-01-02DOI: 10.1080/19475411.2022.2047827
F. Zhang, Tianqi Jin, Zhaoguo Xue, Yihui Zhang
ABSTRACT Three-dimensional (3D) functional systems are of rapidly growing interest over the past decade, from the perspective of both the fundamental and applied research. In particular, tremendous efforts have been devoted to the developments of 3D flexible, physical sensors, partly because of their substantial advantages over planar counterparts in many specific performances. In this review, we summarize recent advances in diverse categories of 3D flexible physical sensors, covering the photoelectric, mechanical, temperature, magnetic, and other physical sensors. This review mainly focuses on their design strategies, working principles and applications. Finally, we offer an outlook on the future developments, and provide perspectives on the remaining challenges and opportunities in this area. Graphical abstract
{"title":"Recent progress in three-dimensional flexible physical sensors","authors":"F. Zhang, Tianqi Jin, Zhaoguo Xue, Yihui Zhang","doi":"10.1080/19475411.2022.2047827","DOIUrl":"https://doi.org/10.1080/19475411.2022.2047827","url":null,"abstract":"ABSTRACT Three-dimensional (3D) functional systems are of rapidly growing interest over the past decade, from the perspective of both the fundamental and applied research. In particular, tremendous efforts have been devoted to the developments of 3D flexible, physical sensors, partly because of their substantial advantages over planar counterparts in many specific performances. In this review, we summarize recent advances in diverse categories of 3D flexible physical sensors, covering the photoelectric, mechanical, temperature, magnetic, and other physical sensors. This review mainly focuses on their design strategies, working principles and applications. Finally, we offer an outlook on the future developments, and provide perspectives on the remaining challenges and opportunities in this area. Graphical abstract","PeriodicalId":48516,"journal":{"name":"International Journal of Smart and Nano Materials","volume":"13 1","pages":"17 - 41"},"PeriodicalIF":3.9,"publicationDate":"2022-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43888686","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-01-02DOI: 10.1080/19475411.2022.2049393
Lian-hua Ma, Su Wang, Jia Liu, Hong Gao, Wei Zhou
ABSTRACT A design strategy for a mechanical metamaterial with large negative hygroscopic expansion (NHE) was proposed in this paper. Different from the reported structures, the present metamaterial is designed by constructing repeated lattice microstructure consisting of curved ligaments incorporating hydrogel active layers and polymer support layers and straight polymer bars. When immersed in the solution environment, the swelling of hydrogel layer of such composite structure induces the reversed bending of the ligament, leading to the overall ultra-large shrink (negative expansion) deformation of the metamaterial. Through the new structural design, large NHE effects can be achieved. The theoretical investigation and finite element analysis (FEA) were conducted to demonstrate the large negative expansion effects of such metamaterial. The results showed that the effective NHE ratio of the metamaterial is dependent of the curvature of the curved ligament and the size of both the ligament and the connecting rod. The ultra-large NHE ratios about −80% for the 2D structure and −90% for the 3D version can be obtained by adopting the structural parameters. The newly designed metamaterials have potential applications in medical and other fields. GRAPHICAL ABSTRACT
{"title":"The design and investigation of hydrogel-based metamaterials with ultra large negative hygroscopic expansion ratio","authors":"Lian-hua Ma, Su Wang, Jia Liu, Hong Gao, Wei Zhou","doi":"10.1080/19475411.2022.2049393","DOIUrl":"https://doi.org/10.1080/19475411.2022.2049393","url":null,"abstract":"ABSTRACT A design strategy for a mechanical metamaterial with large negative hygroscopic expansion (NHE) was proposed in this paper. Different from the reported structures, the present metamaterial is designed by constructing repeated lattice microstructure consisting of curved ligaments incorporating hydrogel active layers and polymer support layers and straight polymer bars. When immersed in the solution environment, the swelling of hydrogel layer of such composite structure induces the reversed bending of the ligament, leading to the overall ultra-large shrink (negative expansion) deformation of the metamaterial. Through the new structural design, large NHE effects can be achieved. The theoretical investigation and finite element analysis (FEA) were conducted to demonstrate the large negative expansion effects of such metamaterial. The results showed that the effective NHE ratio of the metamaterial is dependent of the curvature of the curved ligament and the size of both the ligament and the connecting rod. The ultra-large NHE ratios about −80% for the 2D structure and −90% for the 3D version can be obtained by adopting the structural parameters. The newly designed metamaterials have potential applications in medical and other fields. GRAPHICAL ABSTRACT","PeriodicalId":48516,"journal":{"name":"International Journal of Smart and Nano Materials","volume":"13 1","pages":"114 - 129"},"PeriodicalIF":3.9,"publicationDate":"2022-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49187358","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-01-02DOI: 10.1080/19475411.2022.2028928
Xia Liu, Hua Ji, Boyan Liu, Qingsheng Yang
ABSTRACT Carbon nanotube fibers (CNTFs) have many desirable properties such as lightweight, high strength, high conductivity, and long lifetimes. Coiled CNTF is an ideal material for preparing electrochemically driven artificial muscles. While previous studies focused mainly on the actuation performance of artificial muscles made of CNTF, this study focuses on an actuator that mimics human finger movements (flexion). More specifically, the preparation of CNTF muscles were optimized by twisting with weight. Then, actuators are designed and assembled by combining all-solid-state CNTF muscles with polypropylene (PP) sheets. Moreover, a dual-electrode system, which is infiltrated by a gel electrolyte, is built into the muscle actuator. In addition, a robotic gripper is fabricated, which uses these actuators. This study can help improve the design of CNTF-based muscle-actuators and future applications in robotics. GRAPHICAL ABSTRACT
{"title":"All-solid-state carbon-nanotube-fiber-based finger-muscle and robotic gripper","authors":"Xia Liu, Hua Ji, Boyan Liu, Qingsheng Yang","doi":"10.1080/19475411.2022.2028928","DOIUrl":"https://doi.org/10.1080/19475411.2022.2028928","url":null,"abstract":"ABSTRACT Carbon nanotube fibers (CNTFs) have many desirable properties such as lightweight, high strength, high conductivity, and long lifetimes. Coiled CNTF is an ideal material for preparing electrochemically driven artificial muscles. While previous studies focused mainly on the actuation performance of artificial muscles made of CNTF, this study focuses on an actuator that mimics human finger movements (flexion). More specifically, the preparation of CNTF muscles were optimized by twisting with weight. Then, actuators are designed and assembled by combining all-solid-state CNTF muscles with polypropylene (PP) sheets. Moreover, a dual-electrode system, which is infiltrated by a gel electrolyte, is built into the muscle actuator. In addition, a robotic gripper is fabricated, which uses these actuators. This study can help improve the design of CNTF-based muscle-actuators and future applications in robotics. GRAPHICAL ABSTRACT","PeriodicalId":48516,"journal":{"name":"International Journal of Smart and Nano Materials","volume":"13 1","pages":"64 - 78"},"PeriodicalIF":3.9,"publicationDate":"2022-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44165501","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-10-02DOI: 10.1080/19475411.2021.2004257
G. Yu, Xiaoyun Wen, C. Du, Ling-Yun Wang, Shao-Jie Zhu
ABSTRACT In this paper, a novel type of isolator, named segmented intelligent isolation bearing (SIIB), is designed and manufactured, which can meet the requirements of seismic fortification under three seismic intensities, i.e. frequent intensity, basic intensity, and rare intensity. A theoretical formula for the output of the SIIB is established to provide a basis for the determination of the size of the SIIB. MRE and STMP used in SIIB were prepared, of which the changes of shear storage modulus and damping factor with the magnetic field under different strain are analyzed. The mechanical properties of the SIIB under small displacement, medium displacement, and large displacement are tested, respectively, and the hysteretic characteristics of force–displacement are analyzed. The dynamic mechanical model combining the rheological model, phenomenological model, and bilinear restoring force model is established to represent the behavior of the SIIB. The results showed that the theoretical results agree well with the experimental results, and the model can significantly reflect the dynamic characteristics of SIIB. Graphical abstract
{"title":"Design and performance study of a segmented intelligent isolation bearing","authors":"G. Yu, Xiaoyun Wen, C. Du, Ling-Yun Wang, Shao-Jie Zhu","doi":"10.1080/19475411.2021.2004257","DOIUrl":"https://doi.org/10.1080/19475411.2021.2004257","url":null,"abstract":"ABSTRACT In this paper, a novel type of isolator, named segmented intelligent isolation bearing (SIIB), is designed and manufactured, which can meet the requirements of seismic fortification under three seismic intensities, i.e. frequent intensity, basic intensity, and rare intensity. A theoretical formula for the output of the SIIB is established to provide a basis for the determination of the size of the SIIB. MRE and STMP used in SIIB were prepared, of which the changes of shear storage modulus and damping factor with the magnetic field under different strain are analyzed. The mechanical properties of the SIIB under small displacement, medium displacement, and large displacement are tested, respectively, and the hysteretic characteristics of force–displacement are analyzed. The dynamic mechanical model combining the rheological model, phenomenological model, and bilinear restoring force model is established to represent the behavior of the SIIB. The results showed that the theoretical results agree well with the experimental results, and the model can significantly reflect the dynamic characteristics of SIIB. Graphical abstract","PeriodicalId":48516,"journal":{"name":"International Journal of Smart and Nano Materials","volume":"12 1","pages":"511 - 532"},"PeriodicalIF":3.9,"publicationDate":"2021-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44343036","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-10-02DOI: 10.1080/19475411.2021.1974972
Fenghua Zhang, Nan Wen, Linlin Wang, Yunqi Bai, J. Leng
ABSTRACT As a kind of medical treatment device, shape memory tracheal stent has a good application prospect. The biodegradable stent can effectively reduce the damage to patients and improve the therapeutic performance of stents. In this work, a series of shape memory polylactic acid (Fe3O4) composite tracheal stents were manufactured by 4D printing. The composite tracheal stents with different structures were designed. Moreover, with the addition of magnetic particles Fe3O4, the shape memory PLA/Fe3O4 composite tracheal stent has a magnetic driving effect. Under the magnetic field, the shape recovery process is completed within 40 s, and the shape recovery rate is more than 99%. Moreover, the 4D printed tracheal stent was also triggered by the irradiation of infrared lamp to realize the remote controlling recovery. The research on the structure design and driving method of 4D printing tracheal stent expands the application scope of shape memory polymer composites in biomedical field, provides a new way for personalized implantable medical devices and minimally invasive surgery. It is of great significance for better precision medical treatment. Graphical abstract
{"title":"Design of 4D printed shape-changing tracheal stent and remote controlling actuation","authors":"Fenghua Zhang, Nan Wen, Linlin Wang, Yunqi Bai, J. Leng","doi":"10.1080/19475411.2021.1974972","DOIUrl":"https://doi.org/10.1080/19475411.2021.1974972","url":null,"abstract":"ABSTRACT As a kind of medical treatment device, shape memory tracheal stent has a good application prospect. The biodegradable stent can effectively reduce the damage to patients and improve the therapeutic performance of stents. In this work, a series of shape memory polylactic acid (Fe3O4) composite tracheal stents were manufactured by 4D printing. The composite tracheal stents with different structures were designed. Moreover, with the addition of magnetic particles Fe3O4, the shape memory PLA/Fe3O4 composite tracheal stent has a magnetic driving effect. Under the magnetic field, the shape recovery process is completed within 40 s, and the shape recovery rate is more than 99%. Moreover, the 4D printed tracheal stent was also triggered by the irradiation of infrared lamp to realize the remote controlling recovery. The research on the structure design and driving method of 4D printing tracheal stent expands the application scope of shape memory polymer composites in biomedical field, provides a new way for personalized implantable medical devices and minimally invasive surgery. It is of great significance for better precision medical treatment. Graphical abstract","PeriodicalId":48516,"journal":{"name":"International Journal of Smart and Nano Materials","volume":"12 1","pages":"375 - 389"},"PeriodicalIF":3.9,"publicationDate":"2021-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42896387","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-10-02DOI: 10.1080/19475411.2021.1987350
Emanuele Oddo, Ruggiero Pesce, M. Derudi, L. Magagnin
ABSTRACT CO2 accumulation is inducing an effect of global warming. Adsorption using solid sorbents is proving as an effective strategy for CO2 capture and reuse. The aim of this study was to develop amino-functionalized magnetic nanoparticles by depositing various amines through co-precipitation or impregnation-sonication. Structural characteristics were studied through SEM, BET and XRD analyses, evidencing coarse particles with low crystallinity and surface areas of 100–150 m2 g−1, while FT-IR confirmed CO2 interacting with substrate. The load of functional group, particles stability, and CO2 sorption capacity were assessed through elemental and thermogravimetric analysis. It was found that loads of functional groups ranging from 1.6 to 6.1 wt.%. were deposited, and most samples showed sound stability up to 100°C. Sorption capacities were in the range 0.2–1.5 g gNH2 −1, the highest being 1.46 g gNH2 −1 for ɛ-aminocaproic acid. Such sample also exhibited good recyclability, with a performance drop of 11% after many cycles. CO2 uptake decreased with increasing temperature in the range 25–45°C, suggesting a chemical bond between CO2 and amines. Amino functionalized particles could thus be an interesting solution for CO2 capture and utilization thanks to fast kinetics, recyclability, and ease of separation. Graphical Abstract
摘要二氧化碳的积累正在引发全球变暖的影响。使用固体吸附剂的吸附被证明是CO2捕获和再利用的有效策略。本研究的目的是通过共沉淀或浸渍超声沉积各种胺来开发氨基功能化的磁性纳米颗粒。通过SEM、BET和XRD分析研究了结构特征，证明粗颗粒结晶度低，表面积为100–150 m2 g−1，而FT-IR证实了CO2与基体的相互作用。通过元素分析和热重分析评估官能团负载、颗粒稳定性和CO2吸附能力。发现沉积了1.6至6.1重量%的官能团负载，并且大多数样品在高达100°C时表现出良好的稳定性。对氨基己酸的吸附能力在0.2–1.5 g gNH2−1之间，最高为1.46 g gNH1。这种样品也表现出良好的可回收性，在多次循环后性能下降了11%。在25–45°C范围内，CO2吸收随着温度的升高而降低，这表明CO2和胺之间存在化学键。因此，由于快速动力学、可回收性和易于分离，氨基官能化颗粒可能是CO2捕获和利用的有趣解决方案。图形摘要
{"title":"Amino-functionalized magnetic nanoparticles for CO2 capture","authors":"Emanuele Oddo, Ruggiero Pesce, M. Derudi, L. Magagnin","doi":"10.1080/19475411.2021.1987350","DOIUrl":"https://doi.org/10.1080/19475411.2021.1987350","url":null,"abstract":"ABSTRACT CO2 accumulation is inducing an effect of global warming. Adsorption using solid sorbents is proving as an effective strategy for CO2 capture and reuse. The aim of this study was to develop amino-functionalized magnetic nanoparticles by depositing various amines through co-precipitation or impregnation-sonication. Structural characteristics were studied through SEM, BET and XRD analyses, evidencing coarse particles with low crystallinity and surface areas of 100–150 m2 g−1, while FT-IR confirmed CO2 interacting with substrate. The load of functional group, particles stability, and CO2 sorption capacity were assessed through elemental and thermogravimetric analysis. It was found that loads of functional groups ranging from 1.6 to 6.1 wt.%. were deposited, and most samples showed sound stability up to 100°C. Sorption capacities were in the range 0.2–1.5 g gNH2 −1, the highest being 1.46 g gNH2 −1 for ɛ-aminocaproic acid. Such sample also exhibited good recyclability, with a performance drop of 11% after many cycles. CO2 uptake decreased with increasing temperature in the range 25–45°C, suggesting a chemical bond between CO2 and amines. Amino functionalized particles could thus be an interesting solution for CO2 capture and utilization thanks to fast kinetics, recyclability, and ease of separation. Graphical Abstract","PeriodicalId":48516,"journal":{"name":"International Journal of Smart and Nano Materials","volume":"12 1","pages":"472 - 490"},"PeriodicalIF":3.9,"publicationDate":"2021-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49566241","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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