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Bioinspired 4d printing Shape-Memory Polyurethane Rhinoplasty Prosthesis for dynamic Aesthetic Adjustment

Journal of Bionic Engineering 2024年第3期21卷 1397-1411页

作者： Jiaqi Liu Guiwei Li He Liu Jincheng Wang Hui Wang Xue Gao Qingping Liu Chenyu Wang department of Plastic and Reconstructive Surgery The First Hospital of Jilin UniversityChangchun130021China department of Orthopaedics The Second Hospital of Jilin UniversityChangchun130041China Key Laboratory of Bionic Engineering(Ministry of Education) Jilin UniversityChangchun130022China

The disparity between the postoperative outcomes of rhinoplasty and the expected results frequently necessitates secondary or multiple surgeries as a compensatory measure,greatly diminishing patient ***,there is renewed optimism for addressing these challenges through the innovative realm of Four-dimensional(4d)*** groundbreaking technology enables three-dimensional objects with shape-memory properties to undergo predictable transformations under specific external ***,implants crafted using 4d printing offer significant potential for dynamic *** by worms in our research,we harnessed 4d printing to fabricate a Shape-Memory Polyurethane(SMPU)for use as a nasal augmentation *** choice of SMPU was guided by its Glass Transition Temperature(Tg),which falls within the acceptable temperature range for the human *** attribute allowed for temperature-responsive intraoperative self-deformation and postoperative *** chosen animal model for experimentation was *** into account the anatomical structure of the rabbit nose,we designed and produced nasal augmentation prostheses with superior *** prostheses were then surgically implanted in a minimally invasive manner into the rabbit ***,they exhibited successful temperature-controlled in-surgery self-deformation according to the predetermined shape and non-invasive remodeling within a mere 9 days *** histological evaluations confirmed the practical viability of these prostheses in a living *** research findings posit that worm-inspired 4d-printed SMPU nasal prostheses hold significant promise for achieving dynamic aesthetic adjustments.

关键词： 4d printing Shape memory polyurethane Rhinoplasty Self-deformation dynamic aesthetic adjustment

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Two-photon polymerization-based 4d printing and its applications

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International Journal of Extreme Manufacturing 2024年第1期6卷 1-25页

作者： Bingcong Jian Honggeng Li Xiangnan He Rong Wang Hui Ying Yang Qi Ge Shenzhen Key Laboratory of Soft Mechanics&Smart Manufacturing Southern University of Science and TechnologyShenzhen 518055People’s Republic of China department of Mechanical and Energy Engineering Southern University of Science and TechnologyShenzhen 518055People’s Republic of China Pillar of Engineering Product development Singapore University of Technology and Design8 Somapah RoadSingapore 487372Singapore

Two-photon polymerization(TPP)is a cutting-edge micro/nanoscale three-dimensional(3d)printing technology based on the principle of two-photon *** surpasses the diffraction limit in achieving feature sizes and excels in fabricating intricate 3d micro/nanostructures with exceptional *** concept of 4d entails the fabrication of structures utilizing smart materials capable of undergoing shape,property,or functional changes in response to external stimuli over *** integration of TPP and 4d printing introduces the possibility of producing responsive structures with micro/nanoscale accuracy,thereby enhancing the capabilities and potential applications of both *** paper comprehensively reviews TPP-based 4d printing technology and its diverse ***,the working principles of TPP and its recent advancements are ***,the optional4d printing materials suitable for fabrication with TPP are ***,this review paper highlights several noteworthy applications of TPP-based 4d printing,including domains such as biomedical microrobots,bioinspired microactuators,autonomous mobile microrobots,transformable devices and robots,as well as anti-counterfeiting *** conclusion,this paper provides valuable insights into the current status and future prospects of TPP-based4d printing technology,thereby serving as a guide for researchers and practitioners.

关键词： two-photonpolymerization 4d printing nano/micro fabrication microrobot

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4d printing of core-shell hydrogel capsules for smart controlled drug release

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Bio-design and Manufacturing 2022年第2期5卷 294-304页

作者： Shuo Zu Zhihui Zhang Qingping Liu Zhenguo Wang Zhengyi Song Yunting Guo Yuanzhu Xin Shuang Zhang Key Laboratory of Bionic Engineering Ministry of EducationJilin UniversityChangchun 130025China School of Mechanical and Aerospace Engineering Jilin UniversityChangchun 130025China

Personalized drugs,as well as disease-specific and condition-dependent drug release,have been highly desired in drug delivery systems for effective and safe ***-dimensional(4 d)printing,as a newly emerging technique to develop drug capsules,displays unique advantages that can autonomously control drug release according to the actual physiological ***,core-shell structured hydrogel capsules were developed using a multimaterial extrusion-based 4 d printing method,which consists of a model drug as the core and UV cross-linked poly(N-isopropylacrylamide)(PNIPAM)hydrogel as the *** to the lower critical solution temperature(LCST)-induced shrinking/swelling properties,the prepared PNIPAM hydrogel capsules showed temperature-responsive drug release along with the topography changes in the cross-linked PNIPAM *** in vitro drug release test confirmed that the PNIPAM hydrogel capsules can autonomously control their drug release behaviors according to changes in ambient ***,the increased shell thickness of these capsules causes an obvious reduction in drug release rate,distinctly indicating that the drug release behavior can be well adjusted by setting the shell thickness of the *** proposed 4 d printing strategy pioneers the paradigm of smart drug release by showing great potential in the smart controlled release of drugs and macromolecular active agents.

关键词： 4d printing Hydrogel capsules Controlled release Poly(N-isopropylacrylamide)(PNIPAM) Personalized drugs

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4d printing of soft orthoses for tremor suppression

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Bio-design and Manufacturing 2022年第4期5卷 786-807页

作者： Moslem Mohammadi Ali Zolfagharian Mahdi Bodaghi Yong Xiang Abbas Z.Kouzani School of Engineering Deakin UniversityGeelongVIC 3216Australia department of Engineering School of Science and TechnologyNottingham Trent UniversityNottingham NG118NSUK School of Information Technology Deakin UniversityGeelongVIC 3216Australia

Tremor is an involuntary and oscillatory movement disorder that makes daily activities difficult for affected patients. Hand tremor-suppression orthoses are noninvasive, wearable devices designed to mitigate tremors. Various studies have shown that these devices are effective, economical, and safe;however, they have drawbacks such as large weight, awkward shape, and rigid parts. This study investigates different types of tremor-suppression orthoses and discusses their efficiency, mechanism,benefits, and disadvantages. First, various orthoses(with passive, semi-active, and active mechanisms) are described in ***, we look at how additive manufacturing(AM) has progressed recently in making sensors and actuators for application in tremor orthoses. Then, the materials used in AM are further analyzed. It is found that traditional manufacturing problems can be solved with the help of AM techniques, like making orthoses that are affordable, lighter, and more customizable. Another concept being discussed is using smart materials and AM methods, such as four-dimensional(4d) printing, to make orthoses that are more comfortable and efficient.

关键词： Tremor suppression Parkinson’s disease Essential tremor Additive manufacturing 4d printing

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design and Research of Form Controlled Planar Folding Mechanism based on 4d printing Technology

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Chinese Journal of Mechanical Engineering 2023年第4期36卷 281-293页

作者： Wencai Zhang Zhenghao Ge duanling Li College of Mechanical and Electrical Engineering Shaanxi University of Science and TechnologyShaanxi 710021China School of Automation Beijing University of Posts and TelecommunicationsBeijing 100876China

The use of non-smart materials in structural components and kinematic pairs allows for flexible assembly in practical applications and is promising for aerospace ***,this approach can result in a complex structure and excessive kinematic pairs,which limits its potential applications due to the difficulty in controlling and actuating the *** smart materials have been integrated into certain mechanisms,such integration is generally considered a unique design for specific cases and lacks ***,organically combining universal mechanism design with smart materials and 4d printing technology,innovating mechanism types,and systematically exploring the interplay between structural design and morphing control remains an open research *** this work,a novel form-controlled planar folding mechanism is proposed,which seamlessly integrates the control and actuation system with the structural components and kinematic pairs based on the combination of universal mechanism design with smart materials and 4d printing technology,while achieving self-controlled dimensional ratio adjustment under a predetermined thermal *** design characteristics of the mechanism are analyzed,and the required structural design parameters for the preprogrammed design are derived using a kinematic *** smart materials and 4d printing technology,folding programs based on material properties and control programs based on manufacturing parameters are encoded into the form-controlled rod to achieve the preprogrammed design of the ***,two sets of prototype mechanisms are printed to validate the feasibility of the design,the effectiveness of the morphing control programs,and the accuracy of the theoretical *** mechanism not only promotes innovation in mechanism design methods but also shows exceptional promise in satellite calibration devices and spacecraft walking systems.

关键词： Form-controlled mechanism Self-folding Smart materials 4d printing Morphing control

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Origami-Based design for 4d printing of 3d Support-Free Hollow Structures

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Engineering 2022年第5期8卷 70-82页

作者： Bingcong Jian Frederic demoly Yicha Zhang H.Jerry Qi Jean-Claude Andre Samuel Gomes Laboratoire Interdisciplinaire Carnot de Bourgogne UMR 6303 Centre National de la Recherche Scientifique&Universitede Technologie de Belfort-MontbeliardUniversite Bourgogne Franche-ComteBelfort 90400France George W.Woodruff School of Mechanical Engineering Georgia Institute of TechnologyAtlantaGA 30332USA Laboratoire Reactions et Genie des Procedes UMR 7274 Centre National de la Recherche Scientifique-Universitede LorraineNancy 54001France

The integration of additive manufacturing(AM)in design and engineering has prompted a wide spectrum of research efforts,involving topologically optimized solid/lattice structures,multimaterial structures,bioinspired organic structures,and multiscale structures,to name a ***,except for obvious cases,very little attention has been given to the design and printing of more complex three-dimensional(3d)hollow structures or folded/creased *** of the main reasons is that such complex open or closed 3d cavities and regular/freeform folds generally lead to printing difficulties from support-structure-related *** address this barrier,this paper aims to investigate four-dimensional(4d)printing as well as origami-based design as an original research direction to design and build 3d support-free hollow *** work consists of describing the rough 3d hollow structures in terms of two-dimensional(2d)printed origami precursor layouts without any support *** origami-based definitions are then embodied with folding functions that can be actuated and fulfilled by 3d printed smart *** desired 3d shape is then built once an external stimulus is applied to the active materials,therefore ensuring the transformation of the 2d origami layout to 3d *** demonstrate the relevance of the proposal,some illustrative cases are introduced.

关键词： Origami-based design 4d printing Smart material Hollow 3d structures Additive manufacturing

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direct ink writing of programmable functional silicone-based composites for 4d printing applications

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Interdisciplinary Materials 2022年第4期1卷 507-516页

作者： Zhiyang Lyu J.ustin Koh Gwendolyn J.H.Lim danwei Zhang Ting Xiong Lei Zhang Siqi Liu Junfei duan Jun ding John Wang Jinlan Wang Yunfei Chen Chaobin He Jiangsu Key Laboratory for design and Manufacture of Micro-Nano Biomedical Instruments School of Mechanical EngineeringSoutheast UniversityNanjingChina department of Materials Science and Engineering National University of SingaporeSingaporeSingapore Agency for Science Technologyand Research(A*STAR)Institute of Materials Research and EngineeringSingaporeSingapore School of Materials Science and Engineering Changsha University of Science and TechnologyChangshaChina School of Physics Southeast UniversityNanjingChina

Polydimethylsiloxane(PdMS)has been widely used in flexible electronics,soft robotics,and ***,the fabrication of PdMS-based devices has mostly relied on conventional approaches,such as casting and molding,thereby limiting their *** we fabricate PdMS-based composites with programmable microstructures by direct ink writing and realize their practical functionalities of four-dimensional(4d)*** mechanical,thermomechanical and magnetic properties of the three-dimensional-printed composites can be well tailored by using carbon,metal,or ceramic functional *** taking advantage of the printable,flexible,and magnetic PdMS composites,we demonstrate new practical functionalities of 4d printing by designing programmable architectures,including magnetic-field-driven battery cases and patchworks,as well as arbitrary morphing ceramic *** particular,4d-printed batteries are constructed by PdMS-based battery cases for the first time,which can be actuated via external magnetic *** study broadens the paradigm of 4d printing for prospective applications,such as implant batteries,biomimetic engineering,and customized biomedical devices.

关键词： 4d printing 4d-printed batteries direct ink writing PdMS polymer-derived ceramics

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4d printing: interdisciplinary integration of smart materials, structural design,and new functionality

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International Journal of Extreme Manufacturing 2023年第3期5卷 342-361页

作者： Zhiyang Lyu Jinlan Wang Yunfei Chen Jiangsu Key Laboratory for design and Manufacture of Micro-Nano Biomedical Instruments School of Mechanical EngineeringSoutheast UniversityNanjing 211189People’sRepublic of China Key Laboratory of Quantum Materials and devices of Ministry of Education School of PhysicsSoutheast UniversityNanjing211189People’s Republic of China

Four-dimensional printing allows for the transformation capabilities of 3d-printed architectures over time,altering their shape,properties,or function when exposed to external *** interdisciplinary technology endows the 3d architectures with unique functionalities,which has generated excitement in diverse research fields,such as soft robotics,biomimetics,biomedical devices,and *** the selection of the material,architectural designs,and employed stimuli is crucial to unlocking the potential of smart customization with 4d *** review summarizes recent significant developments in 4d printing and establishes links between smart materials,3d printing techniques,programmable structures,diversiform stimulus,and new functionalities for multidisciplinary *** start by introducing the advanced features of 4d printing and the key technological roadmap for its *** then place considerable emphasis on printable smart materials and structural designs,as well as general approaches to designing programmable *** also review stimulus designs in smart materials and their associated stimulus-responsive ***,we discuss new functionalities of 4d printing for potential applications and further development directions.

关键词： 4d printing 3d printing smart materials programmable structure stimulus

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4d printing of PLA/PCL shape memory composites with controllable sequential deformation

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Bio-design and Manufacturing 2021年第4期4卷 867-878页

作者： Suqian Ma Zeyu Jiang Meng Wang Lan Zhang Yunhong Liang Zhihui Zhang Lei Ren Luquan Ren The Key Laboratory of Bionic Engineering Ministry of EducationJilin UniversityChangchun 130025China department of Mechanical Aerospace and Civil EngineeringUniversity of ManchesterManchester M139PLUK

Shape memory polymers(SMPs)are a promising class of materials for biomedical applications due to their favorable mechanical properties,fast response,and good ***,it is difficult to achieve controllable sequential shape change for most SMPs due to their high deformation temperature and the simplex deformation ***,shape memory composites based on polylactic acid(PLA)matrix and semi-crystalline linear polymer polycaprolactone(PCL)are fabricated using 4d printing *** with pure PLA,with the rise of PCL content,the 4d-printed PLA/PCL composites show decreased glass transition temperature(Tg)from 67.2 to 55.2°*** the precise control of the deformation condition,controllable sequential deformation with an outstanding shape memory effect can be achieved for the PLA/PCL shape memory *** response time of shape recovery is less than 1.2 s,and the shape fixation/recov-ery rates are above 92%.In order to simulate sequential petal opening and sequential drug releasing effects,a double-layer bionic flower and a drug release device,respectively,are presented by assembling PLA/PCL samples with different PLA/PCL *** results indicate the potential applications of 4d-printed PLA/PCL composites in the field of bio-inspired robotics and biomedical devices.

关键词： 4d printing Shape memory polymer Temperature-responsive Polylactic acid Polycaprolactone

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4d printing of polyurethane paint-based composites

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International Journal of Smart and Nano Materials 2019年第3期10卷 237-248页

作者： Jheng-Wun Su Wenxin Gao Khoinguyen Trinh Stuart M.Kenderes Ezgi Tekin Pulatsu Cheng Zhang Alan Whittington Mengshi Lin Jian Lin department of Mechanical&Aerospace Engineering University of MissouriColumbiaMOUSA department of Mechanical Engineering University of ArkansasFayettevilleARUSA department of Geological Sciences Engineering University of MissouriColumbiaMOUSA department of Food Systems&Bioengineering University of MissouriColumbiaMOUSA

In recent studies,polyurethane has shown multiple properties that make it an excellent candidate material in 4d *** this study,we present a simple and inexpensive additive method to print waterborne polyurethane paint-based composites by adding carboxymethyl cellulose(CMC)and silicon oxide(SiO2)nanoparticles to the *** first function of CMC and SiO_(2) is to improve rheological properties of the polyurethane paint for making a printable precursor,which improves the printing resolution and enhances additive ***,the composite precursors improve the curing rate of the polyurethane paint without changing its inherited shape memory ***,the printed composite parts shown enhanced mechanical strength compared with that of the parts printed with pure ***,the 3d printedpolyurethane-CMCandSiO_(2) parts exhibit time-resolved shape transformation upon heat *** the best of our knowledge,this is the first study of using the polyurethane paint as the precursor for 4d printing,which would open new possibilities in future applications in biomedical engineering,soft robotics and so on.

关键词： 4d printing polyurethane paint carboxymethyl cellulose silicon oxide

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