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Development of Kaolin and glass fiber Reinforced Composites for Thermal Insulating Panels

Open Journal of Composite Materials 2024年第1期14卷 44-59页

作者： Jagadiswar Reddy Tippi Reddy Jens Schuster Yousuf Pasha Shaik Department of Applied Logistics and Polymer Sciences University of Applied Sciences Kaiserslautern Institute for Plastics Engineering West Pfalz (IKW) Pirmasens Germany

In our modern world, where conserving energy is highly valued, thermal insulation panels play a crucial role in reducing heat transfer between two spaces, surfaces, or materials. They are used to enhance the energy efficiency of various industrial applications by minimizing heat loss and temperature control. These panels function as silent protectors, aiding in reducing energy consumption and making things more sustainable and better for the environment. This is where composite materials come in;they are known for their lightweight nature, high strength-to-weight ratio, and excellent thermal insulation properties and have gained significant attention. Researchers are actively engaged in various studies aimed at enhancing these materials further. This research project focuses on the development of kaolin and glass fiber-reinforced composites for thermally insulating panels, to which natural strengthening materials like corn husk and bamboo fibers are added. The aim is to create cost-effective and efficient composite materials for thermal insulation applications by incorporating these components with a binder consisting of potassium silicate, hydroxide, and distilled water. This project involves conducting compression tests, bending tests, impact tests, thermal conductivity measurements, and microscopic analysis to evaluate the mechanical and thermal properties of the developed composites. The profound impact of these engineered composites on thermal insulation panels stands to revolutionize energy conservation efforts, offering a potent avenue to minimize heat loss and enhance overall energy efficiency across an array of industrial sectors.

关键词： Kaolin glass fiber Corn Husk Bamboo Potassium Silicate Potassium Hydroxide

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Efficient utilization of glass fiber separator for low-cost sodium-ion batteries

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矿物冶金与材料学报:英文版 2023年第10期30卷 1878-1886页

作者： Xiaohang Ma Zhijie Chen Tianwen Zhang Xueqian Zhang Yuan Ma Yanqing Guo Yiyong Wei Mengyuan Ge Zhiguo Hou Zhenfa Zi School of Physics and Materials Engineering Hefei Normal UniversityHefei 230601China School of Chemistry and Materials Science University of Science and Technology of ChinaHefei 230026China

The separator is a key component of sodium-ion battery,which greatly affects the electrochemical performances and safety characteristics of the *** glass fiber separator cannot meet the requirements of large-scale application because of high cost and poor mechanical ***,the novel composite separators are prepared by a simple slurry sieving process using glass fiber separator scraps and ordinary qualitative filter paper as raw *** the composite mass ratio is 1:1,the composite separator has excellent comprehensive properties,including tensile strength of 15.8 MPa,porosity of 74.3%,ionic conductivity of 1.57×10^(-3)S·cm^(-1)and thermal stability at 210℃.The assembled sodium-ion battery shows superior cycling performance(capacity retention of 94.1%after 500 cycles at 1C)and rate capacity(retention rate of 87.3%at 10C),and it maintains fine interface *** above results provide some new ideas for the separator design of high-performance and low-cost sodium-ion batteries.

关键词： separator glass fiber low cost sodium-ion batteries

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Flame retardant synergy between interfacial and bulk carbonation in glass fiber reinforced polypropylene

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Chinese Journal of Chemical Engineering 2020年第6期28卷 1725-1732页

作者： Yuan Xue Rongjing Zhao Ling Zhang Chunzhong Li Shanghai Engineering Research Center of Hierarchical Nanomaterials Key Laboratory for Ultrafine Materials of Ministry of EducationSchool of Materials Science and EngineeringEast China University of Science&TechnologyShanghai 200237China

glass fiber reinforced polypropylene(GF-PP)composites have high flammability on account of wick effect which leads to accelerated flow of the polymer melt along the glass fibers(GF)surface to the flame *** this study,dipentaerythritol(DPER),a charring agent,was adsorbed on the GF surface through the hydrogen bond between silane coupling agent and *** has a synergistic effect with the intumescent flame retardants(IFR)added in the composites,which can induce interfacial carbonization on the surface of GF,thus transforming the intrinsic smooth GF surface into roughness *** this way,the negative effect of the wick effect in flame retardancy is ***,the char residues remained on the surface of GF can bring an improved adhesion between GF and char residues formed in the resin so that a more stable barrier char layer is *** PP composites with 20 wt%modified glass fiber(M-GF)and 30 wt%IFR can achieve the UL-94 V-0,and its limiting oxygen index(LOI)value increased from 16.5%to 29.5%.Simultaneously,the heat release rate(HRR),total heat release(THR)and total smoke release(TSR)decreased significantly,and the peak of heat release rate(PHRR)reduced60.6%compared with GF-PP.

关键词： glass fiber Wick effect Flame retardant Interfacial Char layers

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1.3 μm Emission from Nd^(3+)-doped Tellurite glass fiber

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Journal of Materials Science & Technology 2004年第6期20卷 668-670页

作者： Shixun DAI, Junjie ZHANG, Shunguang LI, Jianhu YANG, Shiqing XU, Guonian WANG and Lili HUShanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China Shanghai Inst. of Optics Chinese Acad. of Sci. Shanghai 201800 China

1 wt pct Nd2O3-doped tellurite bulk glass and fiber with the same composition of 75TeO2-15ZnO-5Na2O-5Li2O4(mol fraction, %) were fabricated. Judd-Ofelt analysis was carried out for the bulk. The emission from the 4F3/2→4I13/2 transition in fiber is at 1.33 μm wavelength with a spectral bandwidth of 55 nm, which is similar to that in bulk. In the case of the fiber, the lifetime of 4F3/2 Ievel is 164 μs, and the quantum efficiency is -100%. The figure-of-merit for gain (glass is about 2.8×10-24 cm2·S, which is quite comparable vvith that in Nd3+-doped fluoroaluminate glasses, and is an order of magnitude larger than Pr3+-doped fluoride glasses.

关键词： Tellurite glass glass fiber Rare-earth ion Judd-Ofelt theory

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Performance of Photoluminescence glass fiber in Eu^(3+) Doped ZMCB and ZMLB

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Journal of Rare Earths 2005年第1期23卷 116-119页

作者：常树岚 Department of Chemistry Science and Engineering College Yanbian University Yanji 133002 China

The photoluminescence glass fiber in Eu^(3+) doped ZnO-MgO-CdO-B_2O_3 isdrawn artificially by high-temperature solid state reaction and glass stream hauling method inhandling of photoluminecent waste material . Its diameter is 0 .01 approx 0.30 mm and its length ismore than 10 m. The strong emission band of Eu^(3+) at 613 nm belongs to ~5D_0- >~7F_2 electricdipole transition, and the emission intensity at 591 nm is 40 percent of that at 613 nm andintensity belongs to ~5D_0- >~7F_2 magnetic dipole transition . It is known to all that Eu^(3+)mainly hold asymmetrical center lattice in local ambient and also possesses symmetrical centerlattice. By fitting decay curves of Eu^(3+) of different concentrations, it is discovered that theluminescence changes from the first order decay to the second order decay while the concentrationsof Eu^(3+) are increased . It is observed by SEM that glass fiber shows smooth surface , low crystalgrowing rate , high density of fracture and shellfish veins of fracture obviously submits ditchform. Meanwhile, a series of mechanics parameters were measured and the spectral behaviors of theglass fiber in Eu doped ZnO-MgO-CdO-B_2O_3 were studied.

关键词： luminescence composite borate glass fiber rare earths

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Effect of Stacking Sequences on the Mechanical and Damping Properties of Flax glass fiber Hybrid

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Journal of Renewable Materials 2019年第9期7卷 877-889页

作者： Khouloud Cheour Mustapha Assarar Daniel Scida Rezak Ayad Xiaolu Gong Universitéde Reims Champagne Ardenne LISM EA 469551097 ReimsFrance Universitéde Technologie de Troyes ICD/LASMISUMR CNRS 628110010 TroyesFrance

The aim of this study is to show the interest of the mechanical and dynamical properties of glass-flax hybrid ***,various staking sequences of glass-flax hybrid composites were manufactured and tested in free *** damping coefficients were identified by fitting the experimental responses of free-free bending *** obtained results show that the staking sequences and the position of flax fiber layers in the hybrid composites changed the properties,so a classification of different stacking sequences was *** fact,the hybrid laminate made of two glass external layers placed on both sides of four flax layers is very interesting in term of its mechanical and damping ***,it showed better specific bending modulus and loss factor than glass composites with proportions of 31 and 39%,respectively.A study of a structure of this composite has been made to validate the obtained results.

关键词： Flax fiber glass fiber hybrid composite damping mechanical properties

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High-cycle Fatigue Life Extension of glass fiber/Polymer Composites with Carbon Nanotubes

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Journal of Wuhan University of Technology(Materials Science) 2009年第2期24卷 167-173页

作者： Christopher S Grimmer C K H Dharan Berkeley Composites Laboratory University of California 5135 Etcheverry Hall Berkeley CA94720-1740 USA

The present work shows that the addition of small volume fractions of multi-walled carbon nanotubes （CNTs） to the matrix results in a significant increase in the high-cycle fatigue life. It is proposed that carbon nanotubes tend to inhibit the formation of large cracks by nucleating nano-scale damage zones. In addition, the contribution to energy absorption from the fracture of nanotubes bridging across nano-scale cracks and from nanotube pull-out from the matrix are mechanisms that can improve the fatigue life. An energy-based model was proposed to estimate the additional strain energy absorbed in fatigue. The distributed nanotubes in the matrix appear to both distribute damage as well as inhibit damage propagation resulting in an overall improvement in the fatigue strength of glass fiber composites.

关键词： glass fiber composites carbon nanotubes fatigue strain energy

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A Study on the Estimation of Prefabricated glass fiber Reinforced Concrete Panel Strength Values with an Artificial Neural Network Model

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Computers, Materials & Continua 2016年第4期52卷 41-52页

作者： S.A.Yıldızel A.U.Öztürk Manisa Celal Bayar University Engineering FacultyTurkey

In this study,artificial neural networks trained with swarm based artificial bee colony optimization algorithm was implemented for prediction of the modulus of rapture values of the fabricated glass fiber reinforced concrete *** the application of the ANN models,143 different four-point bending test results of glass fiber reinforced concrete mixes with the varied parameters of temperature,fiber content and slump values were introduced the artificial bee colony optimization and conventional back propagation *** and the testing results of the corresponding models showed that artificial neural networks trained with the artificial bee colony optimization algorithm have remarkable potential for the prediction of modulus of rupture values and this method can be used as a preliminary decision criterion for quality check of the fabricated products.

关键词： Neural network glass fiber reinforced concrete glass fiber

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Fabrication and gain performance of Er^(3+)/Yb^(3+)-codoped tellurite glass fiber

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Journal of Rare Earths 2008年第6期26卷 915-918页

作者：戴世勋徐铁峰聂秋华沈祥王训四 College of Information Science and Engineering Ningbo University

Er^3＋/Yb^3＋-codoped TeO2-ZnO-BaO-La2O3 tellurite glass fiber was fabricated by rotation and rod-in-tube technologies. The thermal stability and optical refractive index of the core and cladding glasses were determined by DTA and optical coupler, respectively. The average background loss of tellurite glass fiber was 1.8 dB/m at 1310 nm. Optical microscopy and field emission scanning electron microscope （FESEM） were used to study structural characteristics of preforms and optical fibers. The main loss of tellurite glass fiber could be attributed to scatter centre due to core-cladding interface defects. The amplifier performance of tellurite glass fiber was investigated by pumping with 980 nm laser diode （LD）. The gain coefficient and maximum signal gain were 0.21 dB/mW and 10 dB, respectively, for a pumping power of 120 mW. Gains exceeding 5 dB were obtained over 30 nm bandwidth from 1535 to 1565 nm. The minimum noise figure was 4.8 dB at 1557 nm.

关键词： tellurite glass glass fiber erbium gain rare earths

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Structure and Properties of CaO-MgO-SiO_2 Inorganic glass fiber with Additives (Al_2O_3,Y_2O_3)

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Journal of Wuhan University of Technology(Materials Science) 2012年第1期27卷 58-62页

作者：刘浩 WANG Xitang ZHANG Baoguo WANG Zhoufu YANG Yuhan The Key State Laboratory Breeding Base of Refractories and Ceramics Wuhan University of Science and TechnologyWuhan 430081China

Abstract： Structure, crystallization and dissolution properties of CaO-MgO-SiO2 inorganic glass fiber in the presence of additives （A12O3, Y2O3） were investigated by DTA, XRD, FTIR and ICP-AES techniques. The results show that with the addition ofAl2O3 and Y2O3, the glass network structure is strengthened and the precipitation of crystals is inhibited for heat-treated fibers. Compared with Y2O3 doped fibers, AI2O3 presents more significant effects on the enhancement of silica network and the inhibition of crystallization in fibers. As for dissolution properties in physiological fluids, though the weight losses, changes of pH values and leached ions concentration lower slightly with the addition ofA1203 and Y203 for the intensified network structure, and fibers still present high dissolution rates.

关键词： glass fiber crystallization dissolution

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