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Mass-produced and uniformly luminescent photochromic fibers toward future interactive wearable displays

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Light(Science & Applications) 2024年第4期13卷 593-595页

作者： Yan Li Yikai Su Department of Electronic Engineering Shanghai Jiao Tong University200240 ShanghaiChina

Enabling flexible fibers with light-emitting capabilities has the potential to revolutionize the design of smart wearable interactive devices.A recent publication in Light Science&Application,an interdisciplinary team of scientists led by ***-Qing Lu and *** Tao has realized a highly flexible,uniformly luminescent photochromic fiber based on a mass-produced thermal drawing *** overcomes the shortcomings of existing commercial lightdiffusing fibers,exhibiting outstanding one-dimensional linear illumination *** research team integrated controllable photochromic fibers into various wearable interaction interfaces,providing a novel approach and insights to enable human-computer interaction.

关键词： interaction fibers uniformly

Impact of doping profiles on the formation of laser-active centers in bismuth-doped GeO_(2)–SiO_(2)glass fibers

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Photonics Research 2024年第2期12卷 260-270页

作者： SERGEY ALYSHEV ALEXANDER VAKHRUSHEV ALEKSANDR KHEGAI ELENA FIRSTOVA KONSTANTIN RIUMKIN MIKHAIL MELKUMOV LYUDMILA ISKHAKOVA ANDREY UMNIKOV SERGEI FIRSTOV Prokhorov General Physics Institute of the Russian Academy of Sciences Dianov Fiber Optics Research Center119333 MoscowRussia Devyatykh Institute of Chemistry of High-Purity Substances of the Russian Academy of Sciences 603951 Nizhny NovgorodRussia

Multi-wavelength-band transmission technology based on the exploitation of the extended spectral region is considered as a potential approach to increase the transmission capacity in the deployed fiber-optic communication *** development of optical amplifiers operating in the O-,E-,S-,and U-telecom bands is an extremely important challenge for the successful implementation of this ***-doped fibers are of increasing interest as gain materials,which can be used to provide broadband amplification in the mentioned telecom *** is due to the ability of Bi ions incorporated into glass network to form bismuth active centers(BACs)with specific optical properties,which are primarily determined by the glass *** this work,the impact of the doping profiles of both Ge atoms as glass modifiers and Bi ions on the BACs formation is studied using a series of bismuth-doped fibers fabricated by the modified chemical vapor deposition(MCVD)*** Bi-to-BACs conversion efficiency in various spatial regions of the studied samples is *** is turned out that for high-Bi concentration regions,the conversion efficiency is very low(less than 10%).In addition,the relationship of the conversion efficiency to the distribution of Bi ions and/or Ge atoms is ***,a continuous-wave laser at 1.46μm with a record slope efficiency of 80%is demonstrated using a Bi-doped fiber with confined doping profile,where the Bi-to-BACs conversion efficiency is 35%.This paper provides new information which might help to facilitate understanding of the features of Bi-doped fibers and their potentially achievable characteristics.

关键词： fiber fibers bismuth

Revolutionize fashion with waterless technology for wood-based cellulosic fibers

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China Textile 2024年第3期 50-51页

作者： Lenzing Group Lenzing Group

From producing fibers made from wood to becoming a global technology leader:take an inspiring journey in time through 80 years of innovation *** journey began in 1890,when Emil Hamburger,a paper industrialist from Lower Austria,acquired the"Starlingermühle"in Lenzing(Austria).Today,the Lenzing Group is an internationally established company with nine production sites and nine sales and planning offices in more than 10 countries.

关键词： fibers becoming technology

Preserving glacier mass:Cellulosic LENZING^(TM) fibers provide snow and ice protection solution

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China Textile 2024年第1期 10-11页

In field trials on Austrian glaciers,nonwovens made of ce u osic LENZING^(TM) fibers are being used to cover glacier *** are showing promising results and offer a sustainable solution for glacier *** containing fossilbased synthetic fibers might cause negative environmental consequences such as microplastics on *** with ce u osic LENZINGTMfibers won the prestigious Swiss BIO TOP,an award for wood and material *** are already widely used to protect snow and ice on glaciers frommelting.

关键词： fibers glacier nonwoven

fibers reinforced composite hydrogels with improved lubrication and load-bearing capacity

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Friction 2022年第1期10卷 54-67页

作者： Jiawei LI Luyao GAO Rongnian XU Shuanhong MA Zhengfeng MA Yanhua LIU Yang WU Libang FENG Meirong CAI Feng ZHOU Lanzhou Institute of Chemical Physics.Chinese Academy of Sciences Lanzhou 730000China School of Mechanical Engineering Lanzhou Jiaotong UniversityLanzhou 730050China School of Chemistry and Chemical Engineering Lanzhou UniversityLanzhou 730000China

Hydrogels as one kind of soft materials with a typical three-dimensional(3D)hydrophilic network have been getting great attention in the field of ***,traditional hydrogels commonly show poor tribology performance under high-load conditions because of their poor mechanical strength and ***,pure chemical-crosslinking hydrogels mixed with different types of the micron-scale fibers can meet the requirements of strength and toughness for biolubrication materials,meanwhile the corresponding tribology performance improves *** a typical case,three kinds of reinforcement matrix including needle-punched fibers,alginate fibers,and cottons are separately combined with Poly(n-vinyl pyrrolidone)-poly 2-hydroxyethyl methacrylate(PVP-PHEMA)hydrogels to prepare fibers reinforced composite *** experimental results show that the mechanical properties of fibers reinforced composite hydrogels improve greatly comparable with pure PVP-PHEMA *** three kinds of fibers reinforced composite hydrogel,the as-prepared composite hydrogels reinforced with needle-punched fibers possess the best strength,modulus,and anti-tearing *** tests indicate that the fibers reinforced composite hydrogels demonstrate stable water-lubrication performance comparable with pure PVP-PHEMA ***,the hydrogel-spunlace fiber samples show the best load-bearing and anti-wear *** improved tribology performance of the composite hydrogels is highly related to mechanical property and the interaction between the fibers and hydrogel ***,spunlace fibers reinforced hydrogel materials with high load-bearing and low friction properties are expected to be used as novel biomimetic lubrication materials.

关键词： composite fibers load

Improved multi-orientation dispersion of short carbon fibers in aluminum matrix composites prepared with square crucible by mechanical stirring

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Journal of Materials Science & Technology 2020年第5期40卷 81-87页

作者： Guanglong Li Yingdong Qu Yaohua Yang Qiwen Zhou Xishi Liu Rongde Li School of Materials Science and Engineering Shenyang University of TechnologyShenyang110870China School of Materials Science and Engineering Harbin Institute of TechnologyHarbin150001China

In order to improve the strength of short carbon fibers reinforced aluminum matrix(Csf/Al)composite,the dispersion of short carbon fibers with multi-orientation was controlled with a square crucible by mechanical *** three-dimensional flow field models of liquid aluminum melt in the square/round crucibles were established and calculated,and the results were *** calculated results show that turbulent flow could be induced both in the square and round crucible,while the non-axisymmetric structure of the square crucible results in higher turbulent kinetic energy in the ***,the uniformity and multi-orientation dispersion of the short fibers can be improved by the intensive turbulent flow in the square crucible,which will be increased by increasing the rotational *** distribution of the short carbon fibers in the aluminum matrix prepared under different rotation velocities in square crucible was experimentally *** the increase of stirring velocity,the multi-orientation dispersion of the short fibers in the composites increased *** experimental results are consistent with the calculation *** tensile testing results show that the strength of the Csf/Al composite can reach 172 MPa when the rotational velocity is 1000 rpm,and it is 48.3%higher than that prepared by the round crucible under the same conditions,which results from the improved multi-orientation dispersion of short carbon fibers in aluminum matrix.

关键词： Square crucible Short carbon fibers Aluminum matrix composite Mechanical stirring Multi-orientation dispersion

Water-stable CsPbBr3 perovskite quantum-dot luminous fibers fabricated by centrifugal spinning for dual white light illumination and communication

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Photonics Research 2021年第8期9卷 1559-1568页

作者： BINHAI YU SHUNMING LIANG FENGYI ZHANG ZONGTAO LI BIN LIU XINRUI DING National and Local Joint Engineering Research Center of Semiconductor Display and Optical Communication Devices South China University of TechnologyGuangzhou 510641China Provincial Key Laboratory of Semiconductor Micro Display Foshan Nationstar Optoelectronics Company Ltd.Foshan 528000China Guangdong Provincial Key Laboratory of Sensor Technology and Biomedical Instrument School of Biomedical EngineeringSun Yat-sen UniversityGuangzhou 510006China

Lead halide perovskite quantum dots(PQDs)display remarkable photoelectric ***,defects such as weak stability in air and water environments limit the development of lead halide PQDs in solid-state light ***,centrifugal spinning is used for the fabrication of stable luminous CsPbBr3 PQD *** immersion in water for 11 months,the PQD fibers still maintained considerable photoluminescence quantum yield,showing high stability in hostile *** water-stability mechanism of the fibers can be explained by the changing defect density,crystal growth of PQDs,and the molecular transformation at the fiber *** white LED based on the CsPbBr3 fibers exhibits satisfying color gamut performance(128%of National Television System Committee).Due to the short photoluminescence lifetime of CsPbBr3 PQDs,the communication potential is also *** CsPbBr3 fibers obtained by centrifugal spinning present a bandwidth of 11.2 MHz,showing promising performance for solid-state light and visible light communication applications.

关键词： communication fibers spinning

Characterization of Novel Lignocellulosic Spinifex littoreus fibers and Their Composites

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Journal of Bionic Engineering 2020年第2期17卷 393-404页

作者： Milan Soosai Christopher Thankian Winowlin Jappes Jebas Thangiah Rajini Nagarajan Mayandi Kalimuthu Sikiru Oluwarotimi Ismail Faruq Mohammad Department of Mechanical Engineering Cape Institute of TechnologyLevengipuramTirunelveli 627114Tamil NaduIndia Department of Mechatronics Engineering Kamaraj College of Engineering&Technology VellakulamMadurai dist-622701Tamil NaduIndia Centre for Composite Materials Department of Mechanical EngineeringKalasalingam UniversityKrishnankoilVirudhunagar 626126Tamil NaduIndia Centre for Engineering Research Department of EngineeringSchool of Engineering and Computer ScienceUniversity of HertfordshireHatfieldHertfordshire AL109ABUK Surfactants Research Chair Department of ChemistryCollege of ScienceKing Saud UniversityRiyadh 11451Kingdom of Saudi Arabia

This innovative work presents mechanical,physical and chemical characterization and analysis of newly extracted fiber from naturally resourced plant stem,named Spinifex littoreus fibers(SLF).This is a novel natural,biodegradable and sustainable reinforcement for an improved ***,the chemical constituents of SLF,such as cellulose,lignin,moisture and wax content were *** raw SLF surfaces were modified by chemical treatment with sodium hydroxide(NaOH),calcium hydroxide(Ca(OH)2)and silane.A polyester matrix was reinforced with all the treated SLF,before the mechanical properties(tensile strengths)of the composites were *** all the surface chemically treated SLF/polyester composite samples,the Ca(OH)2 treated sample exhibited the highest tensile *** microscopic examination was carried out to validate this ***,this analysis established the mechanism of failure of the tensile fractured composite samples,using Scanning Electron Microscope(SEM),among other techniques.

关键词： cellulosic fiber Spinifex littoreus fibers XRD FTIR SEM tensile strength

Mechanically Robust Polylactide fibers with Super Heat Resistance via Constructing in situ Nanofibrils

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Chinese Journal of Polymer Science 2023年第6期41卷 962-971,I0011页

作者： Jun Lu Li-Xiang Yi Yong-Huan Zhao Yang Meng Peng-Xiang Yu Juan-Juan Su Jian Han College of Materials and Textiles Zhejiang Sci-Tech UniversityHangzhou 310018China The Key Lab of Industrial Textile Material and Manufacturing Technology Zhejiang ProvinceZhejiang Sci-Tech UniversityHangzhou 310018China

All-PLA fibers with excellent comprehensive performance and recycling convenience are realized *** molecular weight poly(D-lactide)(HPDLA)is incorporated into poly(L-lactide)(PLLA)matrix to construct in situ nanofibrils structure by taking advantages of the microphase separation between HPDLA and *** tensile strength of HPDLA/PLLA composite fibers(HDL-8)is enhanced from 2.1 cN/dtex of neat PLLA-8 fibers up to 2.9 cN/*** boiling water shrinkage(BWS)and shrinkage in hot air(HAS)significantly decrease to 7.8%and 2.8%,*** abundance of in situ nanofibrils creates a grille-like structure that is crucial for both heat and hydrolysis *** strikingly,a hybrid shish-kebab structure induced by the in situ nanofibrils serves as a mechanical *** work paves a new way for heat resistance and self-reinforcement modification of PLA materials.

关键词： materials. fibers lactide