Publications
548 results found
Jones MP, Murali GG, Laurin F, et al., 2022, Functional flexibility: The potential of morphing composites, Composites Science and Technology, Vol: 230, Pages: 1-12, ISSN: 0266-3538
From plants tracking the sun to the aerodynamics of bird wings, shape change is key to the performance of natural structures. After years of reliance on mechanical joints, human engineering now focuses on improving aerodynamic efficiency through smooth, full form changes in material geometry, achieved using technologies such as morphing composites. Promising improved power generation and efficiency in wind turbines and safer more sustainable aircraft and cars, these materials can achieve both large geometric changes with low energy requirements by cycling between several stable physical states and more gradual changes in geometry by exploiting coefficient of thermal expansion mismatch and structural anisotropy, shape memory polymers and 4D printing. The merits and limitations of these various shape change systems are the subject of extensive and ongoing academic research and both commercial and defence industry trials to improve the viability of these technologies for widespread adoption. Shape change capabilities are often associated with problems in material cost, mass, mechanical properties, manufacturability, and energy requirements. Nonetheless, the considerable and rapid advances in this technology, already resulting in successful trials in advanced civilian and military aircraft and high-performance cars, indicate that future research and development of this materials platform could revolutionise many of our most critical power generation, defence and transport systems.
Barkan-Oeztuerk H, Delorme J, Menner A, et al., 2022, Liquid-liquid extraction using combined hydrophilic-hydrophobic emulsion templated macroporous polymer micromixer-settlers, CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION, Vol: 181, ISSN: 0255-2701
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- Citations: 5
Bai S, Jones MP, de Laclause TP, et al., 2022, Towards robust synchronous belts: influence of surface characteristics on interfacial adhesion, COMPOSITE INTERFACES, Vol: 29, Pages: 1145-1159, ISSN: 0927-6440
Jones MP, Krexner T, Bismarck A, 2022, Repurposing Fischer-Tropsch and natural gas as bridging technologies for the energy revolution, ENERGY CONVERSION AND MANAGEMENT, Vol: 267, ISSN: 0196-8904
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- Citations: 8
Wang J, Anthony DB, Fuentes CA, et al., 2022, Wettability of carbon nanotube-grafted carbon fibers and their interfacial properties in polypropylene thermoplastic composite, Composites Part A: Applied Science and Manufacturing, Vol: 159, Pages: 1-10, ISSN: 1359-835X
The interfacial properties of carbon fiber (CF) reinforced thermoplastic composites depend strongly on the wettability and surface characteristics of the reinforcing fibers, and their compatibility with a chosen matrix. The interface between conventional fibers and thermoplastic matrices is generally weak, due to a lack of specific chemical interaction, especially in the case of polyolefins. Carbon nanotube-grafted-carbon fibers (CNT-g-CF) are considered to be potential reinforcements as they provide additional mechanical interlocking. Commercial CFs were successfully grafted with nanotubes using a continuous, and hence scalable, CVD method. X-ray photoelectron spectroscopy, Wilhelmy wetting measurements, and scanning electron microscopy confirmed the successful grafting and resulting hydrophobic surface chemistry, dominated by van der Waals interactions. The grafted CNTs, with diameters and lengths around 10 nm and 140 nm respectively, were well suited to improve the overall wettability and interfacial shear strength (+53.4 %) of the CNT-g-CF in a polypropylene matrix when compared to as-received unsized CFs.
Krexner T, Bauer A, Zollitsch W, et al., 2022, Environmental life cycle assessment of nano-cellulose and biogas production from manure, JOURNAL OF ENVIRONMENTAL MANAGEMENT, Vol: 314, ISSN: 0301-4797
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- Citations: 6
Ferrer J, Jiang Q, Menner A, et al., 2022, An approach for the scalable production of macroporous polymer beads, JOURNAL OF COLLOID AND INTERFACE SCIENCE, Vol: 616, Pages: 834-845, ISSN: 0021-9797
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- Citations: 3
Yousefi N, Fisher SJ, Burgstaller C, et al., 2022, Hierarchical carbon fibre composites incorporating high loadings of carbon nanotubes, Composites Science and Technology, Vol: 222, ISSN: 0266-3538
Uncured solid bisphenol-A epoxy resins containing up to 20 wt% carbon nanotubes (CNTs) were prepared usingmelt blending in a high shear mixer. The extrudate was ground to produce fine nanocomposite (NC) powders.This simple method produced well-dispersed NC, with CNT agglomerate sizes below 1 μm. Consolidated NCsdisplayed improved tensile moduli and strengths up to 3.3 GPa (+32%) and 78 MPa (+19%), respectively at 15wt% CNT, compared to the pure cured epoxy matrix. The relatively high Tg of 39 ◦C for the uncured NC powderssimplified the manufacture of composite prepregs using wet powder impregnation. The prepregs were laminatedinto hierarchical carbon fibre reinforced composites with improved through-thickness properties. Interlaminarshear strength improved for intermediate CNT loadings in the matrix up to 65 MPa (10 wt% CNT, +19%) butdecreased at higher concentrations. Compression moduli remained constant irrespectively of CNT loading butcompression strength increased with a CNT loading of 2.5 wt% to 772 MPa (+31%). The mechanical propertiesof the hierarchical composites reflect good consolidation (void content <3%) and excellent fibre alignment(<±0.8◦). In addition to the improved mechanical properties, incorporation of CNTs improved the through-thickness electrical conductivity up to 115 S/m
Barkan-Oeztuerk H, Menner A, Bismarck A, 2022, Polymerised high internal phase emulsion micromixers for continuous emulsification, CHEMICAL ENGINEERING SCIENCE, Vol: 252, ISSN: 0009-2509
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- Citations: 4
Lamoriniere S, Jones MP, Ho K, et al., 2022, Carbon nanotube enhanced carbon Fibre-Poly(ether ether ketone) interfaces in model hierarchical composites, COMPOSITES SCIENCE AND TECHNOLOGY, Vol: 221, ISSN: 0266-3538
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- Citations: 6
Werner M, Glueck MS, Braeuer B, et al., 2022, Investigations on sub-structures within cavities of surface imprinted polymers using AFM and PF-QNM, SOFT MATTER, Vol: 18, Pages: 2245-2251, ISSN: 1744-683X
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- Citations: 8
Wu R, Jones MP, Jiang Q, et al., 2022, Assessing shear, tensile and fracture properties of macroporous nanocomposites using the Arcan test, POLYMER TESTING, Vol: 107, ISSN: 0142-9418
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- Citations: 3
Leese HS, Tejkl M, Vilar L, et al., 2022, High-<i>k</i> dielectric screen-printed inks for mechanical energy harvesting devices, MATERIALS ADVANCES, Vol: 3, Pages: 1780-1790
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- Citations: 3
Steindl P, Menner A, Bismarck A, 2022, Permeable emulsion-templated porous polyepoxides, POLYMER, Vol: 240, ISSN: 0032-3861
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- Citations: 3
Rusakov D, Menner A, Spieckermann F, et al., 2022, Morphology and properties of foamed high crystallinity PEEK prepared by high temperature thermally induced phase separation, JOURNAL OF APPLIED POLYMER SCIENCE, Vol: 139, ISSN: 0021-8995
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- Citations: 5
Hubert O, Todorovic N, Bismarck A, 2022, Towards separator-free structural composite supercapacitors, COMPOSITES SCIENCE AND TECHNOLOGY, Vol: 217, ISSN: 0266-3538
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- Citations: 12
Murali GG, Robinson P, Bismarck A, et al., 2022, DEPLOYABLE COMPOSITE MESHES - MODELLING, MANUFACTURE AND CHARACTERISATION, Pages: 1183-1190
This paper describes the design and manufacture of a laminate which, when heated, will deploy into an expanded mesh. The design exploits the bending and/or twisting curvature that results when a non-symmetric laminate is subjected to a temperature change. To ensure the mesh laminate is almost flat after curing (i.e. prior to deployment), layups consisting of non-symmetric sublaminates separated by thermoplastic interleaves have been developed. When such a laminate is subsequently heated above the Tg of the thermoplastic layers, the mesh deploys. Two different layups are investigated; one deploys into a planar mesh and the other deploys into a mesh which forms a curved surface.
Anthony DB, De Luca HG, Almousa H, et al., 2022, Carbon Nanotube-grafted Carbon Fiber Production: A Scaling Challenge, Fiber Society 2022 Spring Conference - Fibers for a Greener Society: From Fundamentals to Advanced Applications, Pages: 51-51
Kuehnelt H, Beutl A, Mastropierro F, et al., 2022, Structural Batteries for Aeronautic Applications-State of the Art, Research Gaps and Technology Development Needs, AEROSPACE, Vol: 9
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- Citations: 12
Weiland K, Wlcek B, Krexner T, et al., 2021, Excellence in Excrements: Upcycling of Herbivore Manure into Nanocellulose and Biogas, ACS SUSTAINABLE CHEMISTRY & ENGINEERING, Vol: 9, Pages: 15506-15513, ISSN: 2168-0485
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- Citations: 6
Eichelter J, Wilhelm H, Mautner A, et al., 2021, High-Velocity Stretching of Renewable Polymer Blends, JOURNAL OF POLYMERS AND THE ENVIRONMENT, Vol: 29, Pages: 3509-3524, ISSN: 1566-2543
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- Citations: 2
Barkan-Oeztuerk H, Menner A, Bismarck A, 2021, Emulsion-Templated Macroporous Polymer Micromixers, Publisher: AMER CHEMICAL SOC, Pages: 14013-14025, ISSN: 0888-5885
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- Citations: 6
Weiland K, Jones MP, Zinsser F, et al., 2021, Grow it yourself composites: delignification and hybridisation of lignocellulosic material using animals and fungi, GREEN CHEMISTRY, Vol: 23, Pages: 7506-7514, ISSN: 1463-9262
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- Citations: 3
Kondor A, Santmarti A, Mautner A, et al., 2021, On the BET surface area of nanocellulose determined using volumetric, gravimetric and chromatographic adsorption methods, Frontiers in Chemical Engineering, Vol: 3, Pages: 1-12, ISSN: 2673-2718
Volumetric N2 adsorption at –196 °C is generally accepted as “gold standard” for estimating the Brunauer-Emmet-Teller (BET) surface area of nanocellulose. It is unclear however, whether the BET surface area of nanocellulose obtained at such low temperatures and pressures is meaningful at an absolute sense, as nanocellulose is used at ambient temperature and pressure. In this work, a systematic evaluation of the BET surface area of nanocellulose using a highly crystalline bacterial cellulose (BC) as model nanocellulose was undertaken to achieve a comprehensive understanding of the limitations of BET method for nanocellulose. BET surface area obtained using volumetric N2 adsorption at –196 °C was compared with the BET surface area acquired from gravimetric experiments using n-octane adsorption measured using dynamic vapour sorption (DVS) and n-octane adsorption determined by inverse gas chromatography (iGC), both at 25 °C. It was found that the BET surface area calculated from volumetric N2 adsorption data was 25% lower than that of n-octane adsorption at 25 °C obtained using DVS and iGC adsorption methods. These results supported the hypothesis that the BET surface area of nanocellulose is both a molecular scale (N2 vs n-octane, molecular cross section of 0.162 nm2 vs 0.646 nm2) and temperature (–196 °C vs 25 °C) dependent property. This study also demonstrates the importance of selecting appropriate BET pressure range based on established criteria and would suggest that the room temperature gravimetric measurement is more relevant for many nanocellulose applications.
Stadlmann A, Mautner A, Pramreiter M, et al., 2021, Interfacial Adhesion and Mechanical Properties of Wood-Polymer Hybrid Composites Prepared by Injection Molding, POLYMERS, Vol: 13
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- Citations: 9
Zhang H, Huang T, Jiang Q, et al., 2021, Recent progress of 3D printed continuous fiber reinforced polymer composites based on fused deposition modeling: a review, JOURNAL OF MATERIALS SCIENCE, Vol: 56, Pages: 12999-13022, ISSN: 0022-2461
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- Citations: 26
Kontturi KS, Lee K-Y, Jones MP, et al., 2021, Influence of biological origin on the tensile properties of cellulose nanopapers, Cellulose, Vol: 28, Pages: 6619-6628, ISSN: 0969-0239
Cellulose nanopapers provide diverse, strong and lightweight templates prepared entirely from sustainable raw materials, cellulose nanofibers (CNFs). Yet the strength of CNFs has not been fully capitalized in the resulting nanopapers and the relative influence of CNF strength, their bonding, and biological origin to nanopaper strength are unknown. Here, we show that basic principles from paper physics can be applied to CNF nanopapers to illuminate those relationships. Importantly, it appeared that ~ 200 MPa was the theoretical maximum for nanopapers with random fibril orientation. Furthermore, we demonstrate the contrast in tensile strength for nanopapers prepared from bacterial cellulose (BC) and wood-based nanofibrillated cellulose (NFC). Endemic amorphous polysaccharides (hemicelluloses) in NFC act as matrix in NFC nanopapers, strengthening the bonding between CNFs just like it improves the bonding between CNFs in the primary cell wall of plants. The conclusions apply to all composites containing non-woven fiber mats as reinforcement.
Jiang Q, Bismarck A, 2021, A perspective: Is viscosity the key to open the next door for foam templating?, REACTIVE & FUNCTIONAL POLYMERS, Vol: 162, ISSN: 1381-5148
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- Citations: 5
Yousefi N, Evans AD, Harper LT, et al., 2021, Solid epoxy resin systems for automated composite manufacturing, COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING, Vol: 142, ISSN: 1359-835X
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- Citations: 3
Steindl P, Decker H, Retzl B, et al., 2021, Emulsion-templated flexible epoxy foams, POLYMER, Vol: 215, ISSN: 0032-3861
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- Citations: 3
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