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Influence of temperature and pressure during thermoforming of softwood pulp

Journal of Bioresources and Bioproducts 2023年第4期8卷 408-420页

作者： Eva Pasquier Robert Skunde Jost Ruwoldt rise pfi AS Høgskoleringen 6BTrondheim 7491Norway TU-Berlin Institute for Polymer Technology and Polymer PhysicsErnst Reuter Platz 1Berlin 10587Germany

In this study,the influence of thermoforming conditions on the resulting material properties was investigated,which aimed at developing advanced wood-fiber-based materials for the replacement of fossil *** bleached softwood pulps were studied,i.e.,northern bleached softwood Kraft pulp(NBSK)and chemi-thermomechanical softwood pulp(CTMP).The thermoforming conditions were varied between 2–100 MPa and 150–200℃,while pressing sheets of 500 g/m^(2)for 10 min to represent thin-walled packaging more *** our results showed,the temperature had a more pronounced effect on the CTMP substrates than on the Kraft *** was explained by the greater abundance of lignin and hemicelluloses,while fibrillar dimensions and the fines content may play a role in ***,the CTMP exhibited an optimum in terms of tensile strength at intermediate thermoforming *** effect was attributed to two counteracting effects:1)Improved fiber adhesion due to enhanced densification,and 2)embrittlement caused by the loss of *** temperatures likely softened the lignin,enabling fiber collapse and a tighter *** the Kraft substrates,the tensile strength increased linearly with *** pulps showed reduced wetting at elevated thermoforming temperature and pressure,which was attributed to hornification and densification ***,the effect of temperature was again more pronounced for CTMP than for the Kraft *** was concluded that the thermoforming temperature and pressure strongly affected the properties of the final *** chemical composition of the pulps will distinctly affect their response to thermoforming,which could be useful for tailoring cellulose-based replacements for packaging products.

关键词： Thermoforming Molded pulp Fiber-based materials Softwood pulp CTMP NBSK

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Status and progress of metal-supported solid oxide fuel cell: Towards large-scale manufactory and practical applications

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Energy Reviews 2024年第1期3卷 1-23页

作者： Haoran Xu Yu Han Jing Zhu Meng Ni Zhen Yao State Key Laboratory of Clean Energy Utilization Zhejiang University38 Zheda RoadHangzhou310027China Department of Building and Real Estate Research Institute for Sustainable Urban Development(RISUD)&Research Institute for Smart Energy(RISE)Hong Kong Polytechnic UniversityHung HomKowloonHong KongChina Fakultät für Physik Universität BielefeldUniversitätsstr.2533615BielefeldGermany

Metal-supported solid oxide fuel cells(MS-SOFCs)own advantages of high performance,fast start-up,thermal cycle stability,easy sealing,and reduced material *** recent years,significant progress has been made in the development of MS-SOFCs,particularly with respect to improved electrochemical performance,long-term stability,and industrial *** studies have mainly focused on stainless steel-based MS-SOFCs,with an emphasis on the development of low-temperature preparation processes,antioxidant coatings,stable electrodes,and the direct utilization of hydrocarbon ***,Ceres Power and GE have successfully commercialized MS-SOFCs and have constant cooperated with several institutions and companies,such as Jülich Research Center,Weichai and Cummins,to promote the performance and expand the market of *** ahead,this review paper provides an outlook on future research directions in this rapidly evolving field.

关键词： Metal support Solid oxide fuel cell High performance Long-term stability

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SNR and RSSI Based an Optimized Machine Learning Based Indoor Localization Approach:Multistory Round Building Scenario over LoRa Network

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Computers, Materials & Continua 2024年第8期80卷 1927-1945页

作者： Muhammad Ayoub Kamal Muhammad Mansoor Alam Aznida Abu Bakar Sajak Mazliham Mohd Su’ud Malaysian Institute of Information Technology(MIIT) Universiti Kuala LumpurKuala Lumpur50250Malaysia Faculty of Computing and Informatics Multimedia UniversityCyberjaya63100Malaysia Depertment of Computer Science DHA Suffa UniversityKarachiSindh75500Pakistan Riphah Institute of System Engineering(rise) Faculty of ComputingRiphah International UniversityIslamabad46000Pakistan Malaysian France Institute(MFI) Universiti Kuala LumpurKuala Lumpur50250Malaysia Faculty of Engineering and Information Technology School of Computer ScienceUniversity of Technology SydneyUltimoNSW 2007Australia

In situations when the precise position of a machine is unknown,localization becomes *** research focuses on improving the position prediction accuracy over long-range(LoRa)network using an optimized machine learning-based *** order to increase the prediction accuracy of the reference point position on the data collected using the fingerprinting method over LoRa technology,this study proposed an optimized machine learning(ML)based *** signal strength indicator(RSSI)data from the sensors at different positions was first gathered via an experiment through the LoRa network in a multistory round layout *** noise factor is also taken into account,and the signal-to-noise ratio(SNR)value is recorded for every RSSI *** study concludes the examination of reference point accuracy with the modified KNN method(MKNN).MKNN was created to more precisely anticipate the position of the reference *** findings showed that MKNN outperformed other algorithms in terms of accuracy and complexity.

关键词： Indoor localization MKNN LoRa machine learning classification RSSI SNR localization

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Nanocomposite membranes with high-charge and size-screened phosphorylated nanocellulose fibrils for CO_(2)separation

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Green Energy & Environment 2021年第4期6卷 585-596页

作者： Ragne Marie Lilleby Helberg Jonathan Ø.Torstensen Zhongde Dai Saravanan Janakiram Gary Chinga-Carrasco Øyvind W.Gregersen Kristin Syverud Liyuan Deng Department of Chemical Engineering Norwegian University of Science and TechnologyTrondheim7491Norway rise pfi Trondheim7491Norway

In this study,cellulose nanofibrils(CNF)of high charge(H-P-CNF)and screened size(H-P-CNF-S)were fabricated by increasing the charge of phosphorylated cellulose nanofibrils(P-CNFs)during the pre-treatment step of CNF *** show that the H-P-CNF have a significantly higher charge(3.41 mmol g^(-1))compared with P-CNF(1.86 mmol g^(-1)).Centrifugation of H-P-CNF gave a supernatant with higher charge(5.4 mmol g^(-1))and a reduced size(H-P-CNF-S).These tailored nanocelluloses were added to polyvinyl alcohol(PVA)solutions and the suspensions were successfully coated on porous polysulfone(PSf)supports to produce thin-film nanocomposite *** humid mixed gas permeation tests show that CO_(2)permeability increases for membranes with the addition of H-P-CNF-S by 52%and 160%,compared with the P-CNF/PVA membrane and neat PVA membrane,respectively.

关键词： CO_(2)separation Nanocellulose Phosphorylated CNF PVA Nanocomposite TFC membrane

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Anal pruritus:Don’t look away

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World Journal of Gastrointestinal Endoscopy 2024年第3期16卷 112-116页

作者： Andreia Albuquerque Department of Gastroenterology Fernando Pessoa Teaching HospitalGondomarPorto 4420-096Portugal Precancerous Lesions and Early Cancer Management Research Group rise@CI-IPO(Health Research Network) Portuguese Oncology Institute of PortoPorto 4200-072Portugal

Anal pruritus is a common anorectal symptom that can significantly impair a patient’s quality of life,including their mental *** can be one of the most difficult proctological conditions to *** often delay seeking medical attention,since it is an embarrassing but non-life-threatening *** ani can be associated with idiopathic and secondary causes,such as anorectal diseases,cancer(anal or colorectal),dermatological and sexually transmitted diseases,fungal infections and systemic *** patients are referred for a colonoscopy,this can sometimes provide the first opportunity to evaluate the perianal *** of anal pruritus are based on the abnormalities of the perianal skin,one of the most commonly used being the Washington classi-fication.A proper digital anorectal examination is important,as well as an anoscopy to help to exclude anorectal diseases or suspicious *** should be aware of the common etiologies,and classification of the perianal area abnormalities should be provided in the colonoscopy *** on treatment possibilities and follow-up can also be *** treatment normally consists of a triple approach:proper hygiene,elimination of irritants,and skin care and *** topical therapies have been described as possible treatments,including steroids,capsaicin,tacrolimus and methylene blue intradermal injections.

关键词： Anal pruritus Colonoscopy Washington classification Hemorrhoids Fissure Cancer

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π-Extended giant dimeric acceptor as a third component enables highly efficient ternary organic solar cells with efficiency over 19.2%

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Journal of Energy Chemistry 2024年第8期95卷 263-270,I0006页

作者： Mengran Peng Haotian Wu Liming Wu Jianhua Chen Ruijie Ma Qunping Fan Hua Tan Weiguo Zhu Hongxiang Li Junqiao Ding School of Chemical Science and Technology Yunnan UniversityKunming 650500YunnanChina Department of Electrical and Electronic Engineering Research Institute for Smart Energy(RISE)Guangdong-Hong Kong-Macao(GHM)Joint Laboratory for Photonic-Thermal-Electrical Energy Materials and DevicesThe Hong Kong Polytechnic UniversityKowloonHong Kong 999077China State Key Laboratory for Mechanical Behavior of Materials Xi’an Jiaotong UniversityXi’an 710049ShaanxiChina School of Materials Science and Engineering Jiangsu Engineering Laboratory of Light-Electricity-Heat Energy-Converting Materials and ApplicationsChangzhou UniversityChangzhou 213164JiangsuChina College of Polymer Science and Engineering State Key Laboratory of Polymer Materials EngineeringSichuan UniversityChengdu 610065SichuanChina

Ternary strategy with a suitable third component is a successful strategy to improve the photovoltaic performance of organic solar cells(OSCs).Very recently,Y-series based giant molecule acceptors or oligomerized acceptors have emerged as promising materials for achieving highly efficient and stable binary OSCs,while application as third component for ternary OSCs is *** a novelπ-extended giant dimeric acceptor,GDF,is developed based on central Y series core fusion and rigid BDT as linker,and then incorporated into the state-of-the-art PM1:PC6 system to construct ternary *** GDF has a near planar backbone,resulting in increasedπ-conjugation,excellent crystallinity,and good electron transport *** GDF is introduced into the PM1:PC6 system,it ensues in a cascade like the lowest unoccupied molecular orbitals(LUMO)energy level alignment,a complementary absorption band with PM1 and PC6,higher and balanced hole and electron mobility,slightly smaller domain size,and a higher exciton dissociation probability for PM1:PC6:GDF(1:1.1:0.1)blend *** a consequence,the PM1:PC6:GDF(1:1.1:0.1)ternary OSC achieves a champion PCE of 19.22%,with a significantly higher open-circuit voltage and short-circuit current density,compared to 18.45%for the PM1:PC6(1:1.2)binary *** findings show that employing aπ-extended giant dimeric acceptor as a third component significantly improves the photovoltaic performance of ternary OSCs.

关键词： Giant dimeric acceptor Third component Ternary organic solar cells

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Step‑by‑Step Modulation of Crystalline Features and Exciton Kinetics for 19.2%Efficiency Ortho‑Xylene Processed Organic Solar Cells

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Nano-Micro Letters 2024年第2期16卷 258-272页

作者： Bosen Zou Weiwei Wu Top Archie Dela Pena Ruijie Ma Yongmin Luo Yulong Hai Xiyun Xie Mingjie Li Zhenghui Luo Jiaying Wu Chuluo Yang Gang Li He Yan Department of Chemistry Department of Chemistry and Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction The Hong Kong University of Science and TechnologyClear Water BayHong KongPeople’s Republic of China Department of Electronic and Information Engineering Research Institute for Smart Energy(RISE)Guangdong‑Hong Kong‑Macao(GHM)Joint Laboratory for Photonic‑Thermal‑Electrical Energy Materials and DevicesThe Hong Kong Polytechnic UniversityHung HomKowloonHong Kong 999077People’s Republic of China The Hong Kong University of Science and Technology Function HubAdvanced Materials ThrustNanshaGuangzhou 511400People’s Republic of China Department of Applied Physics The Hong Kong Polytechnic UniversityHong KongPeople’s Republic of China Shenzhen Key Laboratory of New Information Display and Storage Materials College of Materials Science and EngineeringShenzhen UniversityShenzhen 518060People’s Republic of China

With plenty of popular and effective ternary organic solar cells(OSCs)construction strategies proposed and applied,its power conversion efficiencies(PCEs)have come to a new level of over 19%in single-junction ***,previous studies are heavily based in chloroform(CF)leaving behind substantial knowledge deficiencies in understanding the influence of solvent choice when introducing a third ***,we present a case where a newly designed asymmetric small molecular acceptor using fluoro-methoxylated end-group modification strategy,named BTP-BO-3FO with enlarged bandgap,brings different morphological evolution and performance improvement effect on host system PM6:BTP-eC9,processed by CF and ortho-xylene(o-XY).With detailed analyses supported by a series of experiments,the best PCE of 19.24%for green solvent-processed OSCs is found to be a fruit of finely tuned crystalline ordering and general aggregation motif,which furthermore nourishes a favorable charge generation and recombination ***,over 19%PCE can be achieved by replacing spin-coating with blade coating for active layer *** work focuses on understanding the commonly met yet frequently ignored issues when building ternary blends to demonstrate cutting-edge device performance,hence,will be instructive to other ternary OSC works in the future.

关键词： Organic solar cells Ternary design Solvent selection Flouro-methoxylated end group Morphological ordering

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Fabrication of Al/AlO_x/Al Josephson junctions on silicon and sapphire substrates using a cold-development technique

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Science China(Physics,Mechanics & Astronomy) 2019年第6期62卷 75-80页

作者： Wei Chen JiaZheng Pan ZuYu Xu YangYang Lv XianJing Zhou XueCou Tu Jun Li GuoZhu Sun HuaBing Wang Research Institute of Superconductor Electronics (rise) Nanjing University

In order to obtain high-quality superconducting qubits, we employed a cold-development technique, using temperatures down to-20°C, to fabricate Al/AlOx/Al Josephson junctions. Cold development greatly reduced the sensitivity of the electron-beam resist to the developer, eliminated molecules of the electron-beam resist at trench edges, and improved the repeatability and reliability of the nanopatterning process. The fabricated samples have well-defined geometries and increased dose margins, with lateral sizes of 100 nm×100 nm on both silicon and sapphire substrates. Together with the bridge-free fabrication method we used in these experiments, we believe that the cold-development technique can play an important role in quantum information technology that employs superconducting qubits.

关键词： Josephson junction cold development electron-beam lithography insulating substrates

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Tunable coplanar waveguide resonator with nanowires

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Chinese Physics B 2015年第4期24卷 425-430页

作者：周渝郏涛翟计全汪橙钟先茜曹志敏孙国柱康琳吴培亨 Research Institute of Superconductor Electronics (rise) Nanjing University

A tunable superconducting half-wavelength coplanar waveguide resonator （CPWR） with Nb parallel nanowires - 300 nm in width embedded in the center conductor was designed, fabricated, and measured. The frequency shift and the amplitude attenuation of the resonance peak under irradiation of 404-nm pulse laser were observed with different light powers at 4.2 K. The RF power supplied to such a CPWR can serve as current bias, which will affect the light response of the resonator.

关键词： coplanar waveguide niobium resonator superconducting nanowire

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Fabrication of High-Quality Niobium Superconducting Tunnel Junctions

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Chinese Physics Letters 2011年第8期28卷 289-292页

作者： XU Qin-Yin CAO Chun-Hai LI Meng-Yue JIANG Yi ZHA Shi-Tong KANG Lin XU Wei-Wei CHEN Jian WU Pei-Heng Research Institute of Superconductor Electronics(rise) Nanjing UniversityNanjing 210093

For high-quality superconducting tunnel junctions(STJs),it is necessary to reduce leakage current as much as *** describe the fabrication of niobium STJs using the selective niobium(Nb)etching process and various ways to minimize the leakage *** experiment shows that the leakage current mainly comes from shorts in the tunnel barrier layer rather than those around the junction *** systematic analysis of the thin film stress,surface morphology and modified junction structures,we fabricate high-quality Nb STJs with a gap voltage of 2.8 mV and a leakage current at 1 mV as low as 8.1%and 0.023%at 4.2 K and 0.3 K,respectively.

关键词： leakage tunnel film

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