22 papers · ranked by Valyu relevance
Yutong Guo, Kangkang Shi, Yujie Chen, Qunfu Fan + 4 more
Thermally responsive shape memory polymer materials are the most widely used type of intelligent materials and have found applications in numerous fields. However, their practical utility is often limited by poor heat conduction. Carbon nanotubes (CNTs), renowned for their exceptional thermo-conductive and photothermal…
Xin Li, Lingchen Mao, Weiqian Li, Han Wu + 11 more
'Jiayi Huang' 'Guodong Liu' 'Keda Yang' 'Wensheng Bu' 'Ni Jiang' 'Zhihua Gan' 'Zhenbo Ning' 'Ivan Ristic' 'Suzana M. Cakić'] A series of polyurethanes (PU-GT) were prepared using polyglycolide-block-polytetrahydrofuran-block-polyglycolide (PGA-PTHF-PGA), polytetrahydrofuran homopolymer (PTHF), glycerol, and…
Xiuhuan Song, Hong Chi, Zibiao Li, Tianduo Li + 1 more
Star-shaped cyclophosphazene (ACP) was employed as covalent crosslinker to form a rigid segment in polyurethanes network, to enhance the mechanical performance and to add extra flame retardant property. The effects of different ACP contents on the shape memory ability and fire resistance performance of polyurethane…
Anna‐Lisa Poser, Thorsten Pretsch
This work introduces the semi-finished product FOIM, a neologism from FOIl and foaM, a phase segregated polyester urethane urea (PEUU) foam, which is synthesized from poly(1,6-hexylene adipate) diol, 4,4’-methylene diphenyl diisocyanate, polyethylene glycol and water as blowing agent. The PEUU is obtained by following…
Maria Staszczak, Leszek Urbański, Arkadiusz Gradys, Mariana Cristea + 4 more
Thermoresponsive shape memory polymers (SMPs) have garnered increasing interest for their exceptional ability to retain a temporary shape and recover the original configuration through temperature changes, making them promising in various applications. The SMP shape change and recovery that happen due to a combination…
Ewa Kijeńska-Gawrońska, Adrian Maliszewski, Monika Bil, Maila Castellano + 2 more
'Maila Castellano' 'Andrea Dodero' 'Silvia Vicini'] Fibrous shape memory scaffolds composed of thermoplastic polyurethane based on a mixture of polycaprolactone diols were fabricated. The effect of the fiber diameter and arrangement- random (rPU) or aligned (aPU), on crystallinity, mechanical properties, and shape…
Arvind Gupta, Beom Soo Kim
The distinctive ability to remember their original form after partial or complete deformation makes shape memory polymers remarkable materials for several engineering and biomedical applications. In the present work, the development of a polycaprolactone based toughened shape memory polyurethane biocomposite promoted…
Gissela Constante, Indra Apsite, Paul S. Auerbach, Sebastian Aland + 4 more
'Dennis Schönfeld' 'Thorsten Pretsch' 'Pavel Milkin' 'Leonid Ionov'] This contribution reports for the first time on fabrication and investigation of wetting properties of structured surfaces containing lamellae with an exceptionally high aspect ratio - height/width ratio demonstrated of 57:1. The lamellar surface was…
Caleb Reese, Grant Musgrave, Anna Huber, Eden Yau + 1 more
Many thermoplastic polymers exhibit outstanding ductility by combining strength and large deformations. These large deformations are irreversible — known as plastic deformation. Elastomers are capable of large, reversible deformation — known as elastic deformation — but have low strength. To this end, we developed…
Authors not listed
We propel photopolymerizable liquid crystalline (LC) shape memory materials from solely elastomeric performance to the thermomechanical performance of tough, yielding thermosets. LC elastomers are at the forefront of smart, stimuli-responsive materials development. To apply their properties to mechanically superior…
Guang‐Zhong Yin, Jose Hobson, Yanyan Duan, De‐Yi Wang
The development of thermal energy storage materials is the most attractive strategy to harvest the solar energy and increase the energy utilization efficiency. Phase change materials (PCMs) have received much attention in this research field for several decades. Herein, we reported a new kind of PCM micro topological…
Tian Chen, Kristina Shea
Autonomous deployment and shape reconfiguration of structures is a crucial field of research in space exploration with emerging applications in the automotive, building and biomedical industries. Challenges in achieving autonomy include: bulky energy sources, imprecise deployment, jamming of components and lack of…
Matteo Arricca, Nicoletta Inverardi, Stefano Pandini, Maurizio Toselli + 2 more
'Maurizio Toselli' 'Massimo Messori' 'Giulia Scalet'] Thermally-driven semi-crystalline polymer networks are capable to achieve both the one-way shape-memory effect and two-way shape-memory effect under stress and stress-free conditions, therefore representing an appealing class of polymers for applications requiring…
Ashley Hicks, Courteney Roberts, Andrew Robinson, Kailey Wilson + 8 more
There is an urgent critical need for a patient-forward vaginal stent that can prevent debilitating vaginal stenosis that occurs in up to 75% of patients who undergo pelvic radiation treatments and adolescent patients after vaginal reconstruction. To this end, we developed a self-fitting vaginal stent based on a…
Sabarinathan P Subramaniyan, Pavana Prabhakar
Syntactic foams have found widespread usage in various applications including, marine, aerospace, automotive, pipe insulation, electrical cable sheathing, and shoe insoles. However, syntactic foams are often exposed to moisture when used in these applications that potentially alter their viscoelastic properties, which…
Authors not listed
Visualization of stress and strain in polymeric materials is essential for advanced material development, and mechanochromic mechanophores (MMs)—which reversibly change their optical properties under mechanical force—have attracted considerable attention. Here, we present a flag-hinged MM based on highly emissive boron…
Luai R. Khoury, Ionel Popa
Programmable behavior combined with tailored stiffness and tunable biomechanical response are key requirements for developing successful materials. However, these properties are still an elusive goal for protein-based biomaterials. Here, we present a new method based on protein-polymer interactions, to manipulate the…
Authors not listed
Cellulose makes up roughly 45% of every tree, making it the most widely abundant natural polymer on Earth. Lignin is the second most abundant natural polymer on Earth, making up 18-30% of woody biomass. In general, the two processes that create the most desirable properties for most lignin valorization projects are the…
Han Sol Kim, Evan M. White, Grant Crane, Kush Patel + 5 more
Thermoplastic polyurethanes (TPUs) are a class of versatile thermoplastic elastomers where most of their products lack a proper recycling strategy or have no end-of-life solutions. To pursue a sustainable end-of-life solution for TPU based products, self-disintegrating biocomposite TPUs have recently been developed by…
Andrew Robinson, Abbey Nkansah, Sanchita Bhat, Shweta Karnik + 7 more
Polymeric heart valves offer the potential to overcome the limited durability of tissue based bioprosthetic valves and the need for anticoagulant therapy of mechanical valve replacement options. However, developing a single-phase material with requisite biological properties and target mechanical properties remains a…
Authors not listed
Catheter-associated infections is a major concern in hospital, leading to both life-threating for the patients and a high cost for society. The development of a straightforward and industrial route to make antibacterial catheter is thus worthwhile. This study demonstrates that the use of 2 wt% of an antibacterial…
Claire Liu, Jin-Tae Kim, Da Som Yang, Donghwi Cho + 16 more
Many recently developed classes of wireless, skin-interfaced bioelectronic devices rely on conventional thermoset silicone elastomer materials, such as poly(dimethylsiloxane) (PDMS), as soft encapsulating structures around collections of electronic components, radio frequency antennas and, commonly, rechargeable…