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SSRN 2025年

作者： Nicolae, Carmen-Valentina Jahani Kadousaraei, Masoumeh Yamada, Shuntaro Aydin, Mehmet Serhat Al-Sharabi, Niyaz Campodoni, Elisabetta Sandri, Monica Steinmüller-Nethl, Doris Syverud, Kristin Rashad, Ahmad Stancu, Izabela Cristina Mustafa, Kamal Advanced Polymer Materials Group University Politehnica of Bucharest 1-7 Gh. Polizu Street Bucharest011061 Romania Center of Translational Oral Research Department of Clinical Dentistry Faculty of Medicine University of Bergen Bergen Norway CNR-ISTEC Institute of Science and Technology for Ceramics National Research Council of Italy Faenza Italy DiaCoating GmbH Wattens Austria RISE PFI AS Trondheim Norway Bioengineering Graduate Program Aerospace and Mechanical Engineering University of Notre Dame Notre DameIN46556 United States

The development of bioinks for bone tissue engineering (BTE) requires a precise balance of printability, stability and bioactivity to ensure cell viability while supporting cell attachment, proliferation and osteogenic differentiation. Although numerous bioink formulations for BTE demonstrate good printability and bioactivity, they often lack the stability or osteogenic potential required to support long-term bone regeneration. To address these limitations, we developed multicomponent formulations for extrusion-based bioprinting by combining TEMPO-oxidized cellulose nanofibrils (TO-CNFs) with gelatin methacryloyl (GelMA) and sodium alginate (SA). The formulation was further loaded with nanodiamond particles (NDs), magnesium-doped nanohydroxyapatite (MgHA) or a combination of both to impart synergistic effects. This study investigates the individual and combined effects of NDs and MgHA on the printability, structural integrity, biocompatibility, and osteogenic performance of the bioink, hypothesizing that a dual nanoparticle system could provide superior multifunctionality. Rheological and printability tests confirmed that the incorporation of NDs improved the structural integrity and printing fidelity of the printed structures, with all formulations showing comparable mechanical properties. Seeded human gingival fibroblasts showed enhanced viability and spreading, and favorable metabolic activity and proliferation on ND-containing hydrogels. While the viability and elongation of bioprinted osteoblast-like cells in all four bioinks were comparable, MgHA-containing bioinks promoted osteogenic differentiation of osteoblasts, shown by increased Runx2 expression, ALP activity, and biomineralization. These findings suggest that the combined incorporation of NDs and MgHA within the TO-CNFs-GelMA-SA matrix provides a promising platform with robust printability and enhanced bioactivity, addressing the current trade-offs in the design of bioinks for comprehensive BTE. © 2025,

关键词： Bone

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Sharma et al. Reply:

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Physical Review Letters 2022年第21期128卷 219602-219602页

作者： Keshav Sharma Nathalia L. Costa Yoong Ahm Kim Hiroyuki Muramatsu Newton M. Barbosa Neto Luiz G. P. Martins Jing Kong Alexandre Rocha Paschoal Paulo T. Araujo Department of Physics and Astronomy University of Alabama Tuscaloosa 35487 Alabama USA Department of Physics Federal University of Ceara Fortaleza 60455-760 Ceara Brazil Department of Polymer Engineering School of Polymer Science and Engineering and Alan G. MacDiarmid Energy Research Institute Chonnam National University 77 Yongbong-ro Buk-gu Gwangju 61186 Republic of Korea Research Institute for Supra-Materials Shinshu University 4-17-1 Wakasato 380-8553 Nagano Japan Institute of Natural Sciences Graduate Program in Physics Federal University of Para Belem 66075-110 Brazil Department of Physics Massachusetts Institute of Technology Cambridge 02139 Massachusetts USA Department of Electrical Engineering and Computer Science Massachusetts Institute of Technology Cambridge 02139 Massachusetts USA

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A facile strategy for the preparation of end-capped and cross-linkable poly(propylene carbonate) with high performance

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Advanced Industrial and engineering polymer Research 2019年第4期2卷 161-166页

作者： Song, Pengfei Ran, Baocheng Shang, Yingqi Kang, Li Chen, Yalun Sun, Luyi College of Chemistry and Chemical Engineering Gansu International Scientific and Technological Cooperation Base of Water-Retention Chemical Functional Materials Key Laboratory of Eco-functional Polymer Materials of the Ministry of Education Key Laboratory of Eco-environmental Polymer Materials of Gansu Province Northwest Normal University Lanzhou730070 China Polymer Program Institute of Materials Science Department of Chemical & Biomolecular Engineering University of Connecticut StorrsCT06269 United States

Itaconic anhydride (IAn) was firstly used for the modification of poly(propylene carbonate) (PPC) by solution blending following with the direct heating treatment, producing end-capped and cross-linkable PPC (PECPPC) with high performance. The reaction of PPC with IAn was detailed investigated and the structure of PECPPC was identified by FTIR and 1H NMR. A facile strategy including end-capping and cross-linking can be developed to improve the performance of PPC. Differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) measurements revealed that the glass transition temperature (Tg) and thermal decomposition temperature (Td) of PECPPCs are all much higher than those of PPC and increased with the increasing content of IAn. Tensile tests also showed the huge enhancement on the mechanical properties of PPC with the end-capping and cross-linking techniques, and the highest tensile strength of PECPPC4 is 37.5 MPa. Furthermore, ECPPC4 exhibits high hydrolysis rate in phosphate buffer solution (PBS) than that of PPC. It is demonstrated that the strategy with the combination of end-capping and cross-linking is efficient for the perfect modification of PPC with IAn. © 2019 Kingfa SCI. & TECH. CO., LTD.

关键词： Differential scanning calorimetry

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Corrigendum to ‘Polyimide composite separator containing surface-modified hollow mesoporous silica nanospheres for lithium-ion battery application’ [polymer 212 (2021) 123288]

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polymer 2021年 213卷

作者： Tae-Yang Jeong Young Dong Lee Yoojung Ban Juho Lee Hayeong Lee Yong Ku Kwon Department of Polymer Science and Engineering and Program in Environmental and Polymer Engineering Inha University Inha-Ro 100 Incheon 22212 South Korea

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Thermodynamics of Linear Carbon Chains

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Physical Review Letters 2021年第12期126卷 125901-125901页

作者： Nathalia L. Costa Keshav Sharma Yoong Ahm Kim Go Bong Choi Morinobu Endo Newton M. Barbosa Neto Alexandre R. Paschoal Paulo T. Araujo Department of Physics Federal University of Ceara 60455-760 Fortaleza Ceara Brazil Department of Physics and Astronomy University of Alabama Tuscaloosa Alabama 35487 USA Department of Polymer Engineering School of Polymer Science and Engineering and Alan G. MacDiarmid Energy Research Institute Chonnam National University 77 Yongbong-ro Buk-gu Gwangju 61186 Republic of Korea Faculty of Engineering Shinshu University 4-17-1 Wakasato Nagano-shi 380-8553 Japan Institute of Natural Sciences Graduate Program in Physics Federal University of Para 66075-110 Belem PA Brazil

Linear carbon chains (LCCs) are one-dimensional materials with unique properties, including high Debye temperatures and restricted selection rules for phonon interactions. Consequently, their Raman C-band frequency’s temperature dependence is a probe to their thermal properties, which are well described within the Debye formalism even at room temperatures. Therefore, with the basis on a semiempirical approach we show how to use the C band to evaluate the LCCs’ internal energy, heat capacity, coefficient of thermal expansion, thermal strain, and Grüneisen parameter, providing universal relations for these quantities in terms of the number of carbons atoms and the temperature.

关键词： Specific heat Temperature Thermal expansion Thermal properties Thermodynamics Thermomechanical effects 1-dimensional systems Lattice models in condensed matter Raman spectroscopy

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Graphene transfer methods: A review

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Nano Research 2021年第11期14卷 3756-3772页

作者： Sami Ullah Xiaoqin Yang Huy Q.Ta Maria Hasan Alicja Bachmatiuk Klaudia Tokarska Barbara Trzebicka Lei Fu Mark H.Rummeli College of Energy Soochow Institute for Energy and Materials InnovationsKey Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu ProvinceSoochow UniversitySuzhou215006China School of Energy and Power Engineering Xi’an Jiaotong UniversityXi’an710049China Institute for Complex Materials IFW Dresden20 Helmholtz StrasseDresden01069Germany NUTECH School of Applied Sciences&Humanities and Computer Engineering DepartmentNational University of TechnologyIslamabad42000Pakistan Centre of Polymer and Carbon Materials Polish Academy of SciencesM.Curie-Sklodowskiej 34Zabrze41-819Poland College of Chemistry and Molecular Science Wuhan UniversityWuhan430072China Institute of Environmental Technology VŠB-Technical University of Ostrava17.listopadu 15Ostrava70833Czech Republic

Graphene is a material with unique properties that can be exploited in electronics, catalysis, energy, and bio-related fields. Although, for maximal utilization of this material, high-quality graphene is required at both the growth process and after transfer of the graphene film to the application-compatible substrate. Chemical vapor deposition (CVD) is an important method for growing high-quality graphene on non-technological substrates (as, metal substrates, e.g., copper foil). Thus, there are also considerable efforts toward the efficient and non-damaging transfer of quality of graphene on to technologically relevant materials and systems. In this review article, a range of graphene current transfer techniques are reviewed from the standpoint of their impact on contamination control and structural integrity preservation of the as-produced graphene. In addition, their scalability, cost- and time-effectiveness are discussed. We summarize with a perspective on the transfer challenges, alternative options and future developments toward graphene technology.

关键词： high-quality transfer application-compatible substrate graphene technology

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Wetting on Silicone Surfaces

arXiv

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arXiv 2024年

作者： Hauer, Lukas Naga, Abhinav Badr, Rodrique G.M. Pham, Jonathan T. Wong, William S.Y. Vollmer, Doris Institute for Biology Humboldt-Universität zu Berlin Berlin10115 Germany Max Planck Institute for Polymer Research Ackermannweg 10 Mainz55128 Germany Department of Physics Durham University DH1 3LE United Kingdom Institut für Physik Johannes Gutenberg-Universität Mainz Staudingerweg 7-9 Mainz55099 Germany Department of Chemical and Environmental Engineering University of Cincinnati CincinnatiOH45221 United States Department of Applied Physics School of Science Aalto University Espoo02150 Finland

Silicone is frequently used as a model system to investigate and tune wetting on soft materials. Silicone is biocompatible and shows excellent thermal, chemical, and UV stability. Moreover, the mechanical properties of the surface can be easily varied by several orders of magnitude in a controlled manner. Polydimethylsiloxane (PDMS) is a popular choice for coating applications such as lubrication, self-cleaning, and drag reduction, facilitated by low surface energy. Aiming to understand the underlying interactions and forces, motivated numerous and detailed investigations of the static and dynamic wetting behavior of drops on PDMS-based surfaces. Here, we recognize the three most prevalent PDMS surface variants, namely liquid-infused (SLIPS/LIS), elastomeric, and liquid-like (SOCAL) surfaces. To understand, optimize, and tune the wetting properties of these PDMS surfaces, we review and compare their similarities and differences by discussing (i) the chemical and molecular structure, and (ii) the static and dynamic wetting behavior. We also provide (iii) an overview of methods and techniques to characterize PDMS-based surfaces and their wetting behavior. The static and dynamic wetting ridge is given particular attention, as it dominates energy dissipation, adhesion, and friction of sliding drops and influences the durability of the surfaces. We also discuss special features such as cloaking and wetting-induced phase separation. Key challenges and opportunities of these three surface variants are outlined. © 2024, CC BY.

关键词： Self assembled monolayers

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Degradation of Bio-Based Film Plastics in Soil Under Natural Conditions

SSRN

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SSRN 2022年

作者： Slezak, Radoslaw Krzystek, Liliana Puchalski, Michal Krucińska, Izabella Sitarski, Adam Department of Bioprocess Engineering Faculty of Process and Environmental Engineering Lodz University of Technology Wolczanska 213 Lodz90-924 Poland Institute of Material Science of Textiles and Polymer Composites Faculty of Materials Technology and Textile Design Lodz University of Technology Zeromskiego 116 Lodz90-924 Poland Kutno Sugar Beet Breeding Ltd. Straszkow 12 Klodawa62-650 Poland

The degradation of bio-based plastic materials in field soil under natural conditions was investigated in this study. Three bio-based plastics materials, which contained polylactide (PLA) with polybutylene adipate terephthalate and additives (PLA_1), PLA-based polyester blend with mineral filler (PLA_2), and polybutylene succinate with mineral filler (PBS_1) in the form of the film, were subjected to soil burial biodegradation processes. The experiments were carried out in a climate with an average annual temperature of 9.4°C, in winter and summer periods for one year. The degradation of the materials was evaluated by macro- and microscopic observations, weight loss, thermogravimetric analysis, and tensile test. Macroscopic observation indicated that changes in the color of film surface were visible for samples PBS_1 after 12 months of degradation. Using microscopic inspection the erosion of surface samples PLA_1 and PBS_1 after 12 months was observed. Mass loss of samples PLA_1 and PLA_2 after one year of degradation were below 0.6%. Moreover, for PBS_1 sample, mass loss was equal to 4.3%. Based on the obtained results of the mass loss, a description of the degradation kinetics was proposed, showing the changes in the thickness of the tested polymer over time. The thermal stability of the samples PLA_1 and PLA_2 decreased during the degradation process by 16.1 and 2.6°C, respectively, and for PBS_1 increased by 1.7°C. Tensile strength at break after 12 months of degradation decreased for sample PLA_1 and PLA_2 by 27.3 and 5.8%, respectively, and increased for sample PBS_1 by 28.2% compare to unexposed sample. © 2022, The Authors. All rights reserved.

关键词： Degradation

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High Atom Utility of Robust Ca-Co Bimetallic Catalyst for Efficient Fenton-Like Catalysis in Advanced Oxidation Processes

SSRN

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SSRN 2022年

作者： Mao, Xuanzhi Wang, Minglei Li, Ji Zhang, Maojiang Dong, Chunlei Lei, Heng He, Yulong Zhang, Mingxing Ge, Zhiqing Shen, Rongfang Han, Hongwei Hu, Jiangtao Wu, Guozhong University of Shanghai for Science and Technology China Soochow University China Shanghai Institute of Applied Physics Chinese Academy of Sciences No. 2019 Jialuo Road Jiading District Shanghai201800 China Institute of Environmental Engineering ETH Zürich Zürich8093 Switzerland Ueberlandstrasse 129 Dübendorf8600 Switzerland School of Physical Science and Technology ShanghaiTech University Shanghai200031 China College of Materials and Environmental Engineering Chizhou University Anhui Chizhou247000 China CAS Key Laboratory of Soft Matter Chemistry Department of Polymer Science and Engineering University of Science and Technology of China Anhui Hefei230026 China

Maximizing the number of exposed catalytic sites is a critical factor for high reaction activity in supported metal catalysts. However, achieving high-density metal sites with adequate activity and stability is challenging owing to the low number of anchoring sites and excessive chelation of metal ions. Herein, bimetallic co-catalyst sites were robustly anchored on a polyethylene/polyethylene terephthalate nonwoven fabric via radiation-induced graft polymerization (RIGP) and modified with high ion density. Calcium ions enabled atomic-level structural control, which enhanced the ionic site dispersion and catalytic performance in peroxymonosulfate activation. Using this catalyst, tetracycline hydrochloride was degraded by 97% within 8 min. The wide usage range was confirmed under different conditions. Structural characterization and theoretical calculations were used to explain the complex state of the bimetallic ions and the delicate electronic structures. Catalytic processes using large-scale substrates show potential for the practical application of activated PMS in wastewater treatment. © 2022, The Authors. All rights reserved.

关键词： Metal ions

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The effect of entanglement concentration on the melt memory of polyethylene random copolymer

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polymer 2025年 332卷

作者： Wang, Zefan Zeng, Jiale Liang, Yuling Zhang, Rongchun Zhu, Caizhen Xu, Jian Müller, Alejandro J. School of Chemistry and Environmental Engineering Shenzhen University No. 3688 Nanhai Avenue Nanshan District Shenzhen518060 China South China University of Technology Guangzhou510640 China Guangdong Basic Research Center of Excellence for Energy and Information Polymer Materials South China University of Technology Guangzhou510640 China Polymat and Department of Polymers and Advanced Materials: Physics Chemistry and Technology Faculty of Chemistry University of the Basque Country UPV/EHU Paseo Manuel de Lardizabal 3 Donostia-San Sebastián20018 Spain IKERBASQUE Basque Foundation for Science Plaza Euskadi 5 Bilbao48009 Spain

Upon heating a semi-crystalline polymer above its melting temperature, some ordered chain cluster structures inherited from previous crystallization processes can sometimes be preserved depending on the temperature. These structures can act as self-nuclei that enhance polymer nucleation during subsequent cooling. This phenomenon has been termed "melt memory", and its nature has attracted much scientific discussion. Recent studies on poly(Ε-caprolactone) and poly(ethylene oxide) in an extensive molecular weight range have demonstrated that increased entanglement density can strongly enhance the strength of melt memory. However, evidence for a quantitative relationship between entanglement concentration and melt memory temperature window is still scarce. In this work, we selected a narrowly distributed branched ethylene/butene-1 copolymer (i.e., hydrogenated polybutadiene) as a model material due to its wide melt memory temperature range caused by the segregation of crystallizable and non-crystallizable sequences. A series of PE blends with variable entanglement concentrations were prepared by mixing the ethylene/butene-1 copolymer with an unentangled low molecular weight linear polyethylene (PE). Differential scanning calorimetry (DSC) and small angle X-ray scattering (SAXS) results showed that lower entanglement concentration leads to thinner amorphous layers and, therefore, higher crystallinity. A quantitative relationship between entanglement concentration and melt memory effect has been established based on DSC self-nucleation experiments. Our results demonstrate that the dilution of entanglements and overall comonomer fractions reduces the complexity of the amorphous phase. As a result, nano-sized separated structures could be homogenized at lower temperatures, resulting in lower thermal stability of self-nuclei and, thus, weaker melt memory. © 2025 Elsevier Ltd

关键词： Differential scanning calorimetry

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