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Smart Behavior of Carbon Fiber Reinforced Cement-based Composite

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Journal of Materials science & technology 2003年第3期19卷 239-242页

作者： Wu YAO, Bing CHEN Keru WUState Key Laboratory of Concrete Materials Research, Tongji University, shanghai 200092, China Lab. of Concrete Mat. Res. Tongji Univ. Shanghai 200092 China

The electrical characteristics of cement-based material can be remarkably improved by the addition of short carbon fibers. Carbon fiber reinforced cement composite (CFRC) is an intrinsically smart material that can sense not only the stress and strain, but also the temperature. In this paper, variations of electrical resistivity with external applied load, and relation of thermoelectric force and temperature were investigated. Test results indicated that the electrical signal is related to the increase in the material volume resistivity during crack generation or propagation and the decrease in the resistivity during crack closure. Moreover, it was found that the fiber addition increased the linearity and reversibility of the Seebeck effect in the cement-based materials. The change of electrical characteristics reflects large amount of information of inner damage and temperature differential of composite, which can be used for stress-strain or thermal self-monitoring by embedding it in the concrete structures.

关键词： Carbon fiber Cement-based composite Smart material Seebeck effect

Deposition of Layer-by-layer Inorganic-organic Nano-hybrid Ultrathin Films onto SBA-15

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Chinese Chemical Letters 2003年第8期14卷 852-855页

作者： Han Ming DING Li Ping WANG Yong Kui SHAN Ming Yuan HE Center for the Chemistry of Ionic Liquids East China Normal UniversityShanghai 200062

Deposition of inorganic-organic nano-hybrid ultrathin films onto mesoporous silicate materials has been proven possible by using layer-by-layer assembly method. In combination with sol-gel method, titania, subsequently dye molecules (or polymer) were successfully fabricated onto the inner wall of SBA-15. Their structures were preliminarily characterized by FTIR and solid-state UV-Vis spectroscopy, thermal analysis, and BET surface area measurements, respectively.

关键词： Mesoporous silicate titania dye polymer layer-by-layer.

Corrosion behavior and cytocompatibility of fluoride-incorporated plasma electrolytic oxidation coating on biodegradable AZ31 alloy

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Regenerative Biomaterials 2017年第1期4卷 1-10页

作者： Peng Tian Feng Peng Donghui Wang Xuanyong Liu State Key Laboratory of High Performance Ceramics and Superfine Microstructure Shanghai Institute of CeramicsChinese Academy of SciencesShanghai200050P.R.China

Fluoride-incorporated plasma electrolytic oxidation(PEO)coating was fabricated on biodegradable AZ31 *** surface morphologies and phases were investigated by scanning electron microscopy and X-ray *** effect of fluoride incorporation in coatings on corrosion behaviour was investigated in simulated body fluid and in vitro cytocompatibility of the coatings was also studied by evaluating cytotoxicity,adhesion,proliferation and live-dead stain of osteoblast cells(MC3T3-E1).Furthermore,the corrosion morphologies in vivo were *** results showed that the fluoride could be incorporated into the coating to form MgF2 *** vitro and in vivo degradation tests revealed that the corrosion resistance of the coating could be improved by the incorporation of fluoride,which may attribute to the chemical stability of MgF2 ***,good cytocompatibility of fluoride-incorporated coating was confirmed with no obvious cytotoxicity,enhanced cell adhesion and ***,when the fluoride content was high,a slight inhibition of cell growth was *** results indicate that although fluoride incorporation can enhance the corrosion resistance of the coatings,thus resulting a more suitable environment for cells,the high content of fluoride in the coating also kill cells ascribed to the high released of *** the content of fluoride is well controlled,the PEO coating with MgF2 phase is a promising surface modification of Mg alloys.

关键词： Mg alloy fluoride corrosion resistance cytocompatibility

A hot tearing criterion based on solidifcation microstructure in cast alloys

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Journal of Materials science & technology 2022年第10期105卷 68-80页

作者： Bo Hu Zixin Li Dejiang Li Tao Ying Xiaoqin Zeng Wenjiang Ding National Engineering Research Center of Light Alloy Net Forming School of Materials Science and EngineeringShanghai Jiao Tong UniversityShanghai 200240China The State Key Laboratory of Metal Matrix Composites Shanghai Jiao Tong UniversityShanghai 200240China

A criterion based on solidifcation microstructure was proposed to precisely predict the hot tearing behavior of cast alloys,which takes into account the effects of both mechanical and nonmechanical *** criterion focuses on the events occurring at the grain boundary,which are determined by the thermal contraction,solidifcation shrinkage,grain growing and liquid *** criterion responds to a series of factors that affect hot tearing,such as alloy composition,mold design,casting process and *** credibility has been validated by studying the hot tearing behavior of Mg-Ce *** conformity with the experimental results,this criterion predicted decrease in the number of rods occurring hot tearing with increasing cerium content.A simplifed criterion was derived and validated by Mg-Ce(equiaxed grain)and Mg-Al(columnar grain)alloy systems,which is suitable for the case where the eutectic liquid fraction is low and the liquid feeding can be *** addition,a hot tearing index for equiaxed grains was proposed,that is,|d T/d(f_(s)^(1/3)near(f_(s))^(1/3)=1,and its prediction results were consistent with the hot tearing susceptibility calculated from the experimental results.

关键词： Hot tearing Microstructure Magnesium alloys Casting Criterion

Harnessing strategies for enhancing diabetic wound healing from the perspective of spatial inflammation patterns

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Bioactive Materials 2023年第10期28卷 243-254页

作者： Yixin Cai Kangli Chen Changsheng Liu Xue Qu Key Laboratory for Ultrafine Materials of Ministry of Education School of Material Science and EngineeringFrontiers Science Center for Materiobiology and Dynamic ChemistryEast China University of Science and TechnologyShanghai200237China Wenzhou Institute of shanghai University Wenzhou325000China shanghai Frontier science Center of Optogenetic Techniques for Cell Metabolism Shanghai200237China

Diabetic wound is a great threat to patient’s health and *** refractory diabetic wound shows spatial inflammation patterns,in which the early-wound pattern depicts a deprived acute inflammatory response,and the long-term non-healing wound pattern delineates an excessive and persistent inflammation due to the delayed immune cell infiltration in a positive feedback *** this work,we give points to some strategies to normalize the dysregulated immune process based on the spatial inflammation pattern differences in diabetic wound *** of all,inhibiting inflammatory response to avoid subsequent persistent and excessive immune infiltration for the early diabetic wound is ***,diabetic wounds are unperceptive trauma that makes patients miss the best treatment ***,we also introduce two strategies for the long-term non-healing diabetic *** strategy is about changing chronic wounds to acute ones,which aims to rejuvenate M1 macrophages in diabetic wounds and make spontaneous M2 polarization *** activate the controllable proinflammatory response,western medicine delivers proinflammatory molecules while traditional Chinese medicine develops“wound-pus promoting granulation tissue growth theory”.Another strategy to solve long-term non-healing wounds is seeking switches that target M1/M2 transition *** investigations draw a map that delineates strategies for enhancing diabetic wound healing from the perspective of spatial inflammation patterns systematically.

关键词： Diabetic wound Spatial inflammation pattern M1/M2 transition Biomaterials

Advancing homogeneous networking principles for the development of fatigue-resistant,low-swelling and sprayable hydrogels for sealing wet,dynamic and concealed wounds in vivo

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Bioactive Materials 2024年第4期34卷 150-163页

作者： Yi Zhang Yanjun Pan Ronghang Chang Kangli Chen Kun Wang Haoqi Tan Meng Yin Changsheng Liu Xue Qu Key Laboratory for Ultrafine Materials of Ministry of Education School of Material Science and EngineeringFrontiers Science Center for Materiobiology and Dynamic ChemistryEast China University of Science and TechnologyShanghai 200237China Department of Cardiothoracic Surgery Shanghai Children’s Medical CenterSchool of MedicineShanghai Jiao Tong University1678 Dong Fang RoadShanghai 200127China Suzhou Innovation Center of shanghai University Shanghai UniversitySuzhou 215000JiangsuChina Wenzhou Institute of shanghai University Wenzhou325000China shanghai Frontier science Center of Optogenetic Techniques for Cell Metabolism shanghai 200237China

Effective sealing of wet,dynamic and concealed wounds remains a formidable challenge in clinical *** hydrogel sealants are promising due to their ability to cover a wide area rapidly,but they face limitations in dynamic and moist *** address this issue,we have employed the principle of a homogeneous network to design a sprayable hydrogel sealant with enhanced fatigue resistance and reduced *** network is formed by combining the spherical structure of lysozyme(LZM)with the orthotetrahedral structure of 4-arm-polyethylene glycol(4-arm-PEG).We have achieved exceptional sprayability by controlling the pH of the precursor *** homogeneous network,constructed through uniform cross-linking of amino groups in protein and 4-arm-PEG-NHS,provides the hydrogel with outstanding fatigue resistance,low swelling and sustained *** vitro testing demonstrated that it could endure 2000 cycles of underwater shearing,while in vivo experiments showed adhesion maintenance exceeding 24 ***,the hydrogel excelled in sealing leaks and promoting ulcer healing in models including porcine cardiac hemorrhage,lung air leakage and rat oral ulcers,surpassing commonly used clinical ***,our research presents an advanced biomaterial strategy with the potential to advance the clinical management of wet,dynamic and concealed wounds.

关键词： Sprayable hydrogel sealants Homogeneous network Fatigue-resistance Low swelling Wet dynamic and concealed wound

Novel C-17 spirost protostane-type triterpenoids from Alisma plantago-aquatica with antiinflammatory activity in Caco-2 cells

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Acta Pharmaceutica Sinica B 2019年第4期9卷 809-818页

作者： Qinghao Jin Jianqing Zhang Jinjun Hou Min Lei Chen Liu Xia Wang Yong Huang Shuai Yao Bang Yeon Hwang Wanying Wu Dean Guo shanghai Institute of Materia Medica Chinese Academy of SciencesShanghai 201203China School of Pharmacy Shenyang Pharmaceutical UniversityShenyang 110016China University of Chinese Academy of sciences Beijing 100049China College of Pharmacy Chungbuk National UniversityCheongju 2816South Korea

Twenty-one protostane-type triterpenoids with diverse structures, including nine new compounds(1 e9), were isolated from the of Alisma plantago-aquatica Linn. Structurally, alisolides A-F(1 e6), composed of an oxole group coupled to a five-membered ring, represent unusual C-17 spirost protostane-type triterpenoids. Alisolide H(8) is a novel triterpenoid with an unreported endoperoxide bridge. Alisolide I(9) represents the first example of 23,24-acetal triterpenoid. Their structures were elucidated based on spectroscopic analysis, wherein the absolute configurations of 4-6, 8 were further confirmed by the Mo2(OAc)4-induced ECD method. Furthermore, all isolates were evaluated for their inhibitory effects on LPS-induced NO production in Caco-2 cells, and all the compounds showed remarkable inhibitory activities, with IC50 values in the range of 0.76 e38.20 mmol/L.

关键词： Alisma plantago-aquatica Linn. Protostane-type triterpenoids Caco-2 cells LPS-induced NO production

A suture-free, shape self-adaptive and bioactive PEG-Lysozyme implant for Corneal stroma defect repair and rapid vision restoration

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Bioactive Materials 2023年第11期29卷 1-15页

作者： Hang Zhou Shaohua Zhang Miao Lei Yixin Cai Honglei Wang Jianguo Sun Jingyuan Cui Changsheng Liu Xue Qu Key Laboratory for Ultrafine Materials of Ministry of Education School of Material Science and EngineeringFrontiers Science Center for Materiobiology and Dynamic ChemistryEast China University of Science and TechnologyShanghai200237China Eye Institute and Department of Ophthalmology NHC Key Laboratory of Myopia(Fudan University)Key Laboratory of MyopiaChinese Academy of Medical SciencesShanghai Key Laboratory of Visual Impairment and RestorationEye&ENT HospitalFudan UniversityShanghai200031China Wenzhou Institute of shanghai University Wenzhou325000China shanghai Frontier science Center of Optogenetic Techniques for Cell Metabolism Shanghai200237China

limitation of donor tissue shortage clinically. In addition, suturing-needed transplantation potentially causes postoperative complications. Herein, we design a PEG-Lysozyme injective hydrogel as a suture-free, shape self-adaptive, bioactive implant for corneal stroma defect repair. This implant experiences a sol-gel phase transition via an in situ amidation reaction between 4-arm-PEG-NHS and lysozyme. The physicochemical properties of PEG-Lysozyme can be tuned by the components ratio, which confers the implant mimetic corneal modulus and provides tissue adhesion to endure increased intraocular pressure. In vitro tests prove that the implant is beneficial to Human corneal epithelial cells growth and migration due to the bioactivity of lysozyme. Rabbit lamellar keratoplasty experiment demonstrates that the hydrogel can be filled into defect to form a shape-adaptive implant adhered to native stroma. The implant promotes epithelialization and stroma integrity, recovering the topology of injured cornea to normal. A newly established animal forging behavior test prove a rapid visual restoration of rabbits when use implant in a suture free manner. In general, this work provides a promising preclinical practice by applicating a self-curing, shape self-adaptive and bioactive PEG-Lysozyme implant for suture-free stroma repair.

关键词： Injective implant Suture free Shape self-adaptive Intraocular pressure endurance Foraging behavioral test

Combination types between graphene oxide and substrate affect the antibacterial activity

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Bioactive Materials 2018年第3期3卷 341-346页

作者： Jiajun Qiu Lu Liu Hongqin Zhu Xuanyong Liu State Key Laboratory of High Performance Ceramics and Superfine Microstructure Shanghai Institute of CeramicsChinese Academy of SciencesShanghai200050China shanghai Normal University Shanghai200234China University of Chinese Academy of sciences Beijing100049China

Duo to their superior physicochemical properties,graphene and its derivatives(GDs),such as graphene oxide(GO)and reduced graphene oxide(rGO),have attracted extensive research interests around the *** recent years,antibacterial activities of GDs have aroused wide concern and substantial works have been ***,the underlying antibacterial mechanisms still remain *** activities of GDs vary with various factors,such as size,number of layers,oxygen-containing groups,and experimental *** assume that combination types between graphene oxide and substrate may affect the antibacterial ***,in this work,GO was fixed on the titanium surface with three kinds of combination types including drop with gravitational effects(GO-D),electrostatic interaction(GO-APS)and electrophoretic deposition(GO-EPD),and the antibacterial activities in vitro were systematically *** showed that combination types affected the ability of GO for preventing Staphylococcus aureus(***)from gathering,sharpness of wrinkles or edges and reactive oxygen spices(ROS)*** *** are in the form of separation without aggregation,GO can effectively interact with them and kill them with sharp wrinkles or edges and high ROS *** could effectively prevent *** from gathering,own sharp wrinkles or edges and could generate higher ROS *** a result,GO-EPD exhibited optimal antibacterial activity against ***,followed by GO-APS and GO-D.

关键词： Graphene oxide Antibacterial Titanium Combination type S.aureus