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Silk fibroin-based inks for in situ 3D printing using a double crosslinking process

Bioactive materials 2024年第5期35卷 122-134页

作者： Francesca Agostinacchio Vincent Fitzpatrick Sandra Dire David LKaplan Antonella Motta National Interuniversity Consortium of Material Science and Technology FlorenceItaly BIOtech Research Center and European Institute of Excellence on Tissue Engineering and Regenerative Medicine Department of Industrial EngineeringUniversity of TrentoTrentoItaly Materials Chemistry Group&“Klaus Müller”Magnetic Resonance Laboratory Department of Industrial EngineeringUniversity of TrentoTrentoItaly Department of Biomedical Engineering Tufts UniversityMedfordMA02155USA

The shortage of tissues and organs for transplantation is an urgent clinical *** situ 3D printing is an advanced 3D printing technique aimed at printing the new tissue or organ directly in the *** ink for this process is central to the outcomes,and must meet specific requirements such as rapid gelation,shape integrity,stability over time,and adhesion to surrounding healthy *** natural materials,silk fibroin exhibits fascinating properties that have made it widely studied in tissue engineering and regenerative ***,further improvements in silk fibroin inks are needed to match the requirements for in situ 3D *** the present study,silk fibroin-based inks were developed for in situ applications by exploiting covalent crosslinking process consisting of a pre-photo-crosslinking prior to printing and in situ enzymatic *** different silk fibroin molecular weights were characterized and the synergistic effect of the covalent bonds with shear forces enhanced the shift in silk secondary structure towardβ-sheets,thus,rapid *** hydrogels exhibited good mechanical properties,stability over time,and resistance to enzymatic degradation over 14 days,with no significant changes over time in their secondary structure and swelling ***,adhesion to tissues in vitro was demonstrated.

关键词： Silk fibroin inks In situ 3D printing Covalent crosslinking Regenerative medicine Rapid gelation

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Mechanically robust surface-degradable implant from fiber silk composites demonstrates regenerative potential

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Bioactive materials 2025年第3期45卷 584-598页

作者： Wenhan Tian Yuzeng Liu Bo Han Fengqi Cheng Kang Yang Weiyuan Hu Dongdong Ye Sujun Wu Jiping Yang Qi Chen Yong Hai Robert O.Ritchie Guanping He Juan Guan School of Materials Science and Engineering Beihang UniversityBeijing100191PR China Department of Orthopedics Capital Medical University Affiliated Beijing Chaoyang HospitalCapital Medical UniversityBeijing100020PR China Department of Materials Science&Engineering University of CaliforniaBerkeleyCA94720USA School of Materials Science and Engineering Anhui University of TechnologyMaanshanAnhui243002PR China College of Light Textile Engineering and Art Anhui Agricultural UniversityHefeiAnhui230036PR China Ningbo Regen Biotech Co. Ltd.NingboZhejiang315157PR China Beijing Advanced Innovation Center for Biomedical Engineering Beijing100083PR China

Through millions of years of evolution,bones have developed a complex and elegant hierarchical structure,utilizing tropocollagen and hydroxyapatite to attain an intricate balance between modulus,strength,and *** this study,continuous fiber silk composites(CFSCs)of large size are prepared to mimic the hi-erarchical structure of natural bones,through the inheritance of the hierarchical structure of fiber silk and the integration with a polyester *** to the robust interface between the matrix and fiber silk,CFSCs show maintained stable long-term mechanical performance under wet *** in vivo degradation,this material primarily undergoes host cell-mediated surface degradation,rather than bulk *** demon-strate significant capabilities of CFSCs in promoting vascularization and macrophage differentiation toward repair.A bone defect model further indicates the potential of CFSC for bone graft *** belief is that the material family of CFSCs may promise a novel biomaterial strategy for yet to be achieved excellent regen-erative implants.

关键词： Hierarchical structure Continuous fiber silk Regenerative biomaterial Cell-mediated degradation Macrophage polarization

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Phase-transition-free rivets for layered oxide potassium cathodes

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Nano Research 2024年第11期17卷 9671-9678页

作者： Jie Chen Apparao M. Rao Caitian Gao Jiang Zhou Limei Cha Xiaoming Yuan Bingan Lu School of Physics and Electronics Hunan University Changsha 410082 China Department of Physics and Astronomy Clemson Nanomaterials Institute Clemson University Clemson SC USA School of Materials Science and Engineering Central South University Changsha 410083 China Materials Science and Engineering program Guangdong Technion-Israel Institute of Technology Shantou 515063 China Materials Science and Engineering program Technion-Israel Institute of Technology Haifa 32000 Israel MATEC Key Lab Guangdong Technion-Israel Institute of Technology Shantou 515063 China Hunan Key Laboratory of Nanophotonics and Devices School of Physics Central South University Changsha 410078 China

As a cathode material for potassium-ion batteries (PIBs), manganese-based layered oxides have attracted widespread attention due to their low cost, ease of synthesis, and high performance. However, the Jahn-Teller effect caused by Mn3+ and the irreversible phase transformation of the structure leads to poor cycle stability, limiting the development of layered oxides in PIBs. Herein, we demonstrate the use of phase-transition-free CaTiO_(3) as rivets in K_(0.5)Mn_(0.9)Ti_(0.1)O_(2) by a simple solid-state method. As verified by the in situ X-ray diffraction, the CaTiO_(3) rivets effectively prevent the slippage of the transition metal layer during charge and discharge, inhibiting structural degradation. As a result, the obtained K_(0.5)Mn_(0.9)Ti_(0.1)O_(2)-0.02CaTiO_(3) shows excellent cycling stability and rate performance, with high capacities of 119.3 and 70.1 mAh·g^(-1) at 20 and 1000 mA·g^(-1), respectively. At 200 mA·g^(-1), the capacity retention remains 94.7% after more than 300 cycles. This work represents a new avenue for designing and optimizing layered cathode materials for PIBs and other batteries.

关键词： potassium cathodes layered oxide phase-transition-free perovskite rivets

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Dual modifications of sensitizers and lanthanide ions on a two-dimensional zirconium-based metal-organic framework for photoluminescent detection

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CrystEngComm 2024年第22期26卷 2852-2861页

作者： Chang, Jhe-Wei Lin, Tzu-Chi Chen, You-Liang Han, Po-Chun Yang, Shang-Cheng Tsai, Meng-Dian Wu, Kevin C.-W. Kung, Chung-Wei Department of Chemical Engineering National Cheng Kung University Tainan City70101 Taiwan Department of Chemical Engineering National Taiwan University Taipei10617 Taiwan Ph. D. Program of Green Materials and Precision Devices College of Engineering National Taiwan University Taipei10617 Taiwan Department of Chemical Engineering and Materials Science Yuan Ze University Chung-Li Taoyuan320 Taiwan

A two-dimensional (2D) zirconium-based metal-organic framework (Zr-MOF) with abundant terminal -OH/-OH2 groups on its nodes, ZrBTB (BTB = 1,3,5-tris(4-carboxyphenyl)benzene), is utilized as a platform for dual post-synthetic modifications (PSM) to immobilize both the benzophenone-based photosensitizer (benzophenone-4,4′-dicarboxylate, bzpdc) and terbium ions onto the 2D Zr-MOF molecular sheets. Terbium ions are installed on the 2D Zr-MOF at various temperatures to adjust the loading of terbium ions on the 2D Zr-MOF while preserving the loading of the photosensitizer. The crystallinity, morphology, porosity, and loadings of both bzpdc ligands and terbium ions are characterized for each material, and the coordinating locations of terbium ions in the Zr-MOF structure are investigated. The photoluminescence (PL) properties of these materials are then examined. Since the installed bzpdc ligand can induce a highly efficient energy transfer to the neighbouring terbium ion upon excitation, the obtained material after dual PSM (ZrBTB-bzpdc-Tb-120) can show strong PL emissions of terbium ions upon the excitation of the bzpdc ligand at 355 nm, with a PL quantum yield of 5.04%. It is more advantageous than the 2D Zr-MOF solely functionalized with terbium ions, which can only exhibit similar emissions upon the excitation of the BTB linker at a less friendly wavelength of 310 nm, with a lower PL quantum yield of 2.94%. Owing to the high chemical stability as well as good dispersity of the luminescent ZrBTB-bzpdc-Tb-120 in water, its performances in selective PL sensing of Fe(iii) ions present in aqueous solutions are investigated. © 2024 The Royal Society of Chemistry.

关键词： Carboxylation

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Preparing lipid nanoparticles with tunable drug loading capacity and morphology via improved sequential nanoprecipitation

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science China Chemistry 2024年第5期67卷 1373-1374页

作者： Haoran Wang Ben Zhong Tang Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction Department of Chemistry.Institute of Molecular Functional MaterialsState Key Laboratory of NeuroscienceDivision of Biomedical Engineering and Division of Life ScienceThe Hong Kong University of Science and TechnologyHong Kong 999077China School of Science and Engineering Shenzhen Institute of Aggregate Science and Technology The Chinese University of Hong KongShenzhen(CUHK-Shenzhen)Shenzhen 518172China

Nanotechnology hailed as a revolutionary new technology of the 21st century, has ignited a wave of innovation across diverse fields spanning chemistry, physics, materials science,medicine, engineering, and electronics. In 2016, Nature published an article titled “The nanolight revolution is coming”, underscoring that “virus-sized particles that emit light in every color could transform applications ranging from television displays to cancer treatment”.

关键词： sized loading treatment

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Optimized CeO_(2) Nanowires with Rich Surface Oxygen Vacancies Enable Fast Li-Ion Conduction in Composite Polymer Electrolytes

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Energy & Environmental materials 2023年第1期6卷 218-223页

作者： Lu Gao Nan Wu Nanping Deng Zhenchao Li Jianxin Li Yong Che Bowen Cheng Weimin Kang Ruiping Liu Yutao Li State Key Laboratory of Separation Membranes and Membrane Processes/National Center for International Joint Research on Separation Membranes School of Textile Science and EngineeringTiangong UniversityTianjin 300387China Materials Science and Engineering Program and Texas Materials Institute The University of Texas at AustinAustin TX 78712USA Department of Materials of Science and Engineering China University of Mining and Technology(Beijing)Beijing 100083China Enpower Energy Corp. Beijing 102600China

Low-cost and flexible solid polymer electrolytes are promising in all-solid-state Li-metal batteries with high energy density and ***,both the low room-temperature ionic conductivities and the small Li^(+)transference number of these electrolytes significantly increase the internal resistance and overpotential of the ***,we introduce Gd-doped CeO_(2) nanowires with large surface area and rich surface oxygen vacancies to the polymer electrolyte to increase the interaction between Gd-doped CeO_(2) nanowires and polymer electrolytes,which promotes the Li-salt dissociation and increases the concentration of mobile Li ions in the composite polymer *** optimized composite polymer electrolyte has a high Li-ion conductivity of 5×10^(-4)4 S cm^(-1) at 30℃ and a large Li+transference number of ***,the composite polymer electrolytes have excellent compatibility with the metallic lithium anode and high-voltage LiNi_(0.8)Mn _(0.1)Co_(0.1)O_(2)(NMC)cathode,providing the stable cycling of all-solid-state batteries at high current densities.

关键词： composite polymer electrolytes,Gd-doped CeO_(2)nanowires Li-ion conduction oxygen vacancies surface interaction

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Phosphorescence Lifetime Imaging for Monitoring an Insertable Hydrogel Multianalyte Sensor 46

Phosphorescence Lifetime Imaging for Monitoring an Insertabl...

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46th Annual International Conference of the IEEE engineering in Medicine and Biology Society, EMBC 2024

作者： Ko, Brian Serivuth Pradhan, Ridhi McShane, Michael J. Texas A&m University Department of Biomedical Engineering College Station United States Texas A&m University Center for Remote Health Technologies and Systems Department of Biomedical Engineering Department of Materials Science & Engineering College Station United States

ISBN: (纸本)9798350371499

Oxidoreductase enzymes paired with oxygen-sensitive phosphorescent dyes can be immobilized in sensor structures that allow for continuous monitoring following insertion with minimal insult to the tissue. However, oxidoreductase-based sensors are limited by their consumption of oxygen, requiring knowledge and control of local oxygen conditions. Further, oxygen-responsive phosphors also exhibit temperature dependence. In this paper, we present a novel sensor design capable of providing glucose measurements while also reporting local oxygen and temperature variations. The sensor was composed of a miniature hydrogel multicompartment device containing phosphorescent sensing assays for glucose, oxygen, and temperature. The sensor was monitored using phosphorescence lifetime time-gated imaging using a custom system. The sensor response to buffer solutions of varying glucose (0, 100, 200, 400 mg/dL), oxygen (0-210 μM), and temperature (32, 37, 42 C) was collected. The lifetime measured from the sensor compartments was found to correlate closely with the Stern-Volmer relationship for luminescence response to changing oxygen concentration. This demonstrates feasibility of a multianalyte sensor platform, laying the foundation for development of tools for minimally-invasive simultaneous monitoring of multiple *** Relevance: Chronic conditions such as diabetes can benefit greatly from continuous monitoring. Oxidoreductase sensing of analytes such as glucose is highly sensitive, highly specific, and well established, but may be affected by local oxygen and temperature variations. In this paper, we present a sensor design that can compensate for environmental fluctuations and improve accuracy, all within a minimally invasive form factor. © 2024 IEEE.

关键词： chronic diseases continuous analyte monitoring optical multiplexing

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Direct ink writing of gradient shear-stiffening elastomer for enhanced toughness and impact resistance

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Journal of Industrial and engineering Chemistry 2025年 149卷 593-603页

作者： Gong, Liping Zhao, Chunyu Lu, Hongda Zhang, Qingtian Chen, Zexin Yang, Junjie Yang, Jinyu Sun, Shuaishuai Du, Haiping Li, Weihua School of Mechanical Materials Mechatronic and Biomedical Engineering University of Wollongong Wollongong2522 Australia CAS Key Laboratory of Mechanical Behaviour and Design of Materials Department of Modern Mechanics University of Science and Technology of China Hefei230027 China School of Electrical Computer and Telecommunication Engineering University of Wollongong Wollongong2522 Australia

Shear-stiffening materials have garnered significant attention due to their inherent ability to rapidly respond to changes in strain rate. However, conventional studies on these materials exhibit limited mechanical performance and insufficient structural design, hindering applications in material science and smart mechatronics. Inspired by the gradient structure of a squid beak, this study uses a direct-ink-writing (DIW) technology to develop a novel gradient shear-stiffening elastomer (GSSE). Comprehensive characterizations were conducted to optimize the printability of the shear-stiffening elastomer under various testing conditions, including rheology, compression, and tension. Additionally, the toughness and impact resistance of the elastomer were systematically investigated. It is demonstrated that the biomimetic GSSE exhibits enhanced flexibility, efficient energy dissipation, and outstanding impact resistance. Consequently, this work advances the field of shear-stiffening elastomers for diverse applications by leveraging the gradient structure design strategy to achieve superior mechanical performance under complex loading conditions. © 2025 The Author(s)

关键词： Strain rate

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Multisensory Conflict Impairs Cortico-Muscular Network Connectivity and Postural Stability: Insights from Partial Directed Coherence Analysis

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Neuroscience Bulletin 2024年第1期40卷 79-89页

作者： Guozheng Wang Yi Yang Kangli Dong Anke Hua Jian Wang Jun Liu Key Laboratory for Biomedical Engineering of Ministry of Education College of Biomedical Engineering&Instrument ScienceZhejiang UniversityHangzhou 310058China Taizhou Key Laboratory of Medical Devices and Advanced Materials Research Institute of Zhejiang University-TaizhouTaizhou 318000China Department of Sports Science College of EducationZhejiang UniversityHangzhou 310058China Center for Psychological Science Zhejiang UniversityHangzhou 310058China

Sensory conflict impacts postural control,yet its effect on cortico-muscular interaction remains *** aimed to investigate sensory conflict's influence on the cortico-muscular network and postural *** used a rotating platform and virtual reality to present subjects with congruent and incongruent sensory input,recorded EEG(electroencephalogram)and EMG(electromyogram)data,and constructed a directed connectivity *** results suggest that,compared to sensory congruence,during sensory conflict:(1)connectivity among the sensorimotor,visual,and posterior parietal cortex generally decreases,(2)cortical control over the muscles is weakened,(3)feedback from muscles to the cortex is strengthened,and(4)the range of body sway increases and its complexity *** results underline the intricate effects of sensory conflict on cortico-muscular *** the sensory conflict,the brain adaptively decreases the integration of conflicting *** this integrated information,cortical control over muscles may be lessened,whereas the muscle feedback may be enhanced in compensation.

关键词： Cortico-muscular interaction Postural control Virtual reality Electroencephalogram Electromyography Sensory integration

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Cooperative Chemical Coupling and Physical Lubrication Effects Construct Highly Dynamic Ionic Covalent Adaptable Network for High-Performance Wearable Electronics

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CCS Chemistry 2023年第5期5卷 1096-1107页

作者： Lijie Sun Hongfei Huang Qingbao Guan Lei Yang Luzhi Zhang Benhui Hu Rasoul Esmaeely Neisiany Zhengwei You Meifang Zhu State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringInstitute of Functional MaterialsResearch Base of Textile Materials for Flexible Electronics and Biomedical Applications(China Textile Engineering Society)Shanghai Engineering Research Center of Nano-Biomaterials and Regenerative MedicineDonghua UniversityShanghai 201620 Key Laboratory of Clinical and Medical Engineering School of Biomedical Engineering and InformaticsNanjing Medical UniversityNanjing 211166 Department of Materials and Polymer Engineering Faculty of EngineeringHakim Sabzevari UniversitySabzevar ***

Covalent adaptable networks(CANs),which combine the benefits of traditional thermosets and thermoplastics,have attracted considerable *** dynamics of reversible covalent bonds and mobility of polymer chains in CANs determine the topological rearrangement of the polymeric network,which is critical to their superior features,such as self-healing and ***,we introduce an ionic liquid to dimethylglyoximeurethane(DOU)-based CANs to regulate both reversible bond dynamics and polymer chain mobility by cooperative chemical coupling and physical ***-molecule model experiments demonstrated that ionic liquids can catalyze dynamic DOU bond *** liquid also breaks the hydrogen bonds between polymeric chains,thereby increasing their *** a combined result,the activation energy of the dissociation of the dynamic network decreased from 110 to 85 kJ mol^(−1).Furthermore,as a functional moiety,the ionic liquid imparts new properties to CANs and will greatly expand their *** example,the consequent conductivity of resultant ionic CAN(iCAN)has demonstrated a great power to build high-performance multifunctional wearable electronics responsive to multiple stimulations including temperature,strain,and *** study provides a new design principle that simultaneously uses the chemical and physical effects of two structural components to regulate material properties enabling novel applications.

关键词： covalent adaptable networks polyurethane self-healing recycling ionic skin

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