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Metal-Polymer Functional Materials for Hydrogen-Oxygen Fuel Cells with Enhanced Performance Marina Lebedeva1,a*, Alexey Antropov1,b, Vera Golovacheva1,c, Vadim Erasov1,d, Yashtulov Nikolay1,e 1MIREA – Russian Technology University, Russian Federation, Moscow, 119454, Vernadskogo Avenue, 78 a*lebedevamv2030@gmail.com, balexeyantrop@yandex.ru, cplatina09@mail.ru, dvadim.ersv@yandex.ru, eyashtulovna@mail.ru Keywords: Platinum and palladium nanoparticles, polymer membrane, nanocomposite materials, fuel cell, catalytic activity.
It was found that increased catalytic activity is characteristic of electrode materials synthesized with a nonionic surfactant and a minimum solubilization coefficient ω = 1.5.
Elgowainy, Electric, Hybrid, and Fuel Cell Vehicles (Encyclopedia of Sustainability Science and Technology Series), Springer, 2021
Sun, Supportless Pt-ionomer hybrid porous nanofibrous networks with self-regulated water management for polymer electrolyte fuel cells, Materials Today Nano. 18 (2022) 100215
Yashtulov, Development of membrane-electrode blocks for energy-efficient autonomous energy sources, Bashkir Chemical Journal. 28 (2021) 90-96

Materials and Methods Materials.Banana peel: Banana is planted in Guangdong, China.
Results and discussion The effect of the different ration of materials on squeezing.As shown in Table 2, density of extrudates increased with banana peel powder addition.There is solid evidence in the literature that as high-fibre materials are added, density is expected to increase [13].
Journal of Cereal Science, 11, 249–259
Journal of Cereal Science 50 (2009) 227–234 [20] Santillan-Moreno,A.
B. (2008).Journal of the Science of Food and Agriculture, 88, p.1487–1493

The FDM technology thus offers the potential to produce the functional parts with a variety of materials including composite materials.
Material Science and Engineering A301 (2006) 125-130
Journal of Engineering Manufacture, 2010, 220(72): 2541-2550
Melt flow behavior of poly-e caprolactone in fused deposition modelling, Journal of Material Science: Material in Medicine, 2011, 19(7);2541-2550
Tsinghua Science and Technology, ISSN 1007-0214 05/38.

Mass transfer in the laser-interaction zone at selective laser melting influences the quality of the obtained material.
Materials and Methods For the experimental part of this work, it was used the selective laser melting setup equipped with fiber Nd:YAG laser that has a wavelength of 1064 nm and a system of laser beam scanning.
Acknowledgements This work has been financed by the sources of Russian Science Foundation (grant agreement №15-19-00254).
[4] Khmyrov R.S., Protasov C.E., Gusarov A.V., Influence of the conditions of selective laser melting on evaporation, MATEC Web of Conferences, EDP Sciences, 2018
J., Critical influences of particle size and adhesion on the powder layer uniformity in metal additive manufacturing, Journal of Materials Processing Technology, 266 (2019) 484-501.

Many papers have reported on the synthesis, characterization, stability, and application of these materials [1, 2].
Mesoporous sorbents are used in various fields of chemical researches as chromatographic material [3], gas sensing [4] and catalytically active materials [5].
Such material possesses enhanced gas sensitivity and chromatographic materials [7, 8].
Bhat, Exploring the Potential of Mesoporous Silica, SBA-15, as an Adsorbent for Light Hydrocarbon Separation, Chemical Materials, 14 (2002) 304-309
Tsutsumi, Adsorption Characteristics of Organosilica Based Mesoporous Materials, Langmuir, 20 (2004) 7139-7145

Borek 1,b 1 Division of Materials Processing Technology, Management and Computer Techniques in Materials Science, Institute of Engineering Materials and Biomaterials, Silesian University of Technology, ul.
Grajcar: Archives of Materials Science and Engineering Vol. 28, (2007), pp. 743-750
Padmanabhan: Journal of Materials Science Letters Vol. 13, (1994), pp. 389-392
Guelton: Materials Science and Engineering A Vol. 387-389, (2004), pp. 158-162
Borek: Archives of Materials Science and Engineering Vol. 37, (2009), pp. 69-76.

Investigation on mechanical properties of clay-based material prepared from the Yellow river silt Yang Jiu-jun1, 2, a, Zhang Lei1, b, Guo Pu3, c, and Wang xue-ping1, d 1 Department of Materials Science and Engineering, Tianjin Institute of Urban Construction, Tianjin 300384, China 2 Tianjin Environmental and Engineering Properties of Soft Soil Key Laboratory, Tianjin 300384, China 3 Shanxi Sanjiang Engineering Testing Co.
At the same time, there is a great lot of building materials demand with the development of society and gradual improvement of foundation construction, especially there is lack of enough building materials in the countryside.
In order to develop a new building materials for the Yellow River area low building construction in the countryside, based on the investigation and analysis of the beach area of the lower reaches of Yellow River silt characteristics, clay-based cementitious materials are prepared with the Yellow River silt as main materials, cement, lime and a few of excitant agent as auxiliary materials.
In conclusion, clay-based cementitious materials can be prepared with the Yellow River silt as main materials, cement, lime and a few of excitant agent as auxiliary materials, which provide a new building material for the Yellow River area low building construction in the countryside.
[5] Cheng K, Xu B, Xu LH, Zhang H and Liu M, Synthesis of O′-SiAlON/SiC refarctory materials from non-traditional resources of Yellow River sand, Rare Metal Materials and Engineering, 36(2006)369-372

Influence of Density on the Thermal Conductivity of Fiberglass Felt Yong Yang1,a,Xueyu Cheng2,b, Zhaofeng Chen1,c,Renli Fu1,d,Zhou Chen1,e, Jinglian Qiu1,f,Dan Su1,g 1College of Material Science and technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, P.R.China 2Suzhou V.I.P.New Material Co., Ltd., Hong Da Fang Yuan Group, Suzhou 215000, P.R.China *Corresponding author.E-mail:zhaofeng_chen@163.com Keywords: Thermal conductivity, Density, Fiberglass felt, Heat-transfer mechanism.
Introduction Fiberglass felt are used widely as insulations and building sections in commercial and industrial applications[1].Coefficient of thermal conductivity for the Fiberglass felt is an important index,which could evaluate the thermal insulation performance of the fiberglass felt.In general,thermal insulations are classified into the following two types of materials:isotropic materials with a uniform thermal conductivity and anisotropic materials with a nonuniform thermal conductivity[2].Fiberglass felt are the isotropic materials.The thermal conductivity of the material is defined as the amount of heat crossing a unit area of the material per unit time per unit temperature gradient[3].In porous materials heat is propagated by three processes:thermal conductance through the solid and both radiation and convection through the pores[3].
In this paper,using this heat-transfer mechanism of the porous materials explains the relationship between thermal conductivity and density of the fiberglass felt.
Generally speaking,thermal properties of a fibrous material depend on:thermal properties of each phase(fiber and air),fiber volume fraction,and fiber size, orientation and mass distribution[4].The value of the thermal conductivity of heat-insulating materials,among which are fibrous materials,is affected by their density and kind,the size and location of pores,the chemical composition and molecular structure of hard constituents,the emissivity of surfaces bounding the pores,and the kind and pressure of the gas filling the pores[5].Main aim of this paper is to describe the relationship between thermal conductivity and density.According to the aim,we study the effect of density of fiberglass felt and analysis the reason.
References [1] N.E.WIJEYSUNDERA and M.N.A.HAWLADER: Effects of condensation and liquid transport on the thermal performance of fibrous insulations, Heal Mass Transfer.Vol.35,No.l0, pp.2605-2616,1992 [2]T.Ohmura1,2, M.Tsuboi1 and T.Tomimura3:Estimation of the Mean Thermal Conductivity of Anisotropic Materials.International Journal of Thermophysics, Vol.23,No.3,May 2002(©2002) [3] ARTHURL.LOEB: Thermal Conductivity: VIII, A Theory of Thermal Conductivity of Porous Materials, Journal of the American Ceramic Society-Loeb, Vol.37, No.2.p.96 [4] Moran Wang, Jihuan He, Jianyong Yu, Ning Pan: Lattice Boltzmann modeling of the effective thermal conductivity for fibrous materials, International Journal of Thermal Sciences 46(2007)848–855 [5] M.G.Kaganer, Heat Insulation in Low-Temperature Technology [in Russian], Mashinostroenie, Moscow(1966)

Study of mastic-aggregate interfacial adhesion in cement emulsified asphalt mixture based on the Discrete Element Method (DEM) Zhenjun WANGa, Rui WANGb, Qiong WANGc and Guangying YANGd School of Materials Science & Engineering, Chang’an University, Xi’an 710061, P.
Cement emulsified asphalt mixture is a kind of composite materials, which is comprised of organic and inorganic materials, such as emulsified asphalt and cement, and has both advantages of cement concrete and asphalt concrete.
,Chen S.F. and Wang B.G.: Journal of Chang’an University (Natural Science Edition) Vol. 30 (2010), p. 6-10.
(in Chinese) [5] You Z.P.and ButtlarW.G.: Journal of Materials in Civil Engineering Vol. 34 (2004), p. 140-145
[6] Hyunwook K., Michael P.W. and William G.B.: Jounal of Materials in Civil Engneering Vol. 6 (2008), p. 552-563.

Meanwhile, green hotel should reduce purchasing disposable goods, try to purchase large packaging goods; and should purchase green raw materials, select safe, pollution-free green food raw materials.
The building and decoration materials of guest rooms should be “green decoration material,” or “ecological decoration material” with no pollution, and low energy consumption; therefore, it should avoid using plastic board or wallpaper that may cause allergic reaction, instead of that, it can choose unprocessed wood, bamboo, and rattan products.
The process includes three aspects: the production of food raw materials must conform to the green standards; the channel of food raw materials must comply with green standards; and the production process must comply with green standards.
Acknowledgements This work was financially supported by the Business Administration School of University of Science and Technology Liaoning.
References [1] Wanwen, Tourism Overview, Vol. 6 (2012), p.38 [2] Xiong chao, in: Analysis on Green Hotel Industry, Manager’ Journal, (2012), p.274 [3] Information on http://www.chinahotel.org.cn [4] Misung Lee, Heesup Han, and Greg Willson, Journal of Travel & Tourism Marketing, 28:840–855, (2011), p.844 [5] YONG JOONG KIM, International Journal of Hospitality & Tourism Administration, 13:195–214, (2012), p.208