The Application of New Type Fiber to the Sports Equipment

2014 ◽  
Vol 1055 ◽  
pp. 84-87
Author(s):  
De Yu Yang

This paper aims to promote the development and application of new fiber material with its products to the field of sports products, from the physical and chemical properties of fiber, as well as producing process, finishing and sorting process and so on. Since each kind of new textile fiber material has been widely used, such as carbon fiber, Outlast fiber, aramid fiber, moisture absorption perspiration functional fiber, negative ion function fiber, which is popular with customers. Moreover, fiber fabrics such as: waterproof and breathable fabric, low resistance movement fabric, ultra high strength fabrics in sports is also introduced in this paper.

Author(s):  
V. V. Primachenko ◽  
L. A. Babkina ◽  
I. V. Khonchik ◽  
L. N. Nikulina ◽  
А S. Tinigin ◽  
...  

Investigations of the amount influence of corundum-zirconium-silicate material on the properties of ramming mullite-corundum mass of MMK-90 grade and samples from it are carried out. The optimum amount of the above material (40 % by weight) is established, the use of which in the composition of ramming mullite-corundum mass provides an increase in thermal shock resistance of the samples made of it (~ 2.0 times more) with sufficiently high strength properties and slag resistance, albeit lower, especially significant in strength, than samples without corundum-zirconium-silicate material. As a result of the carried out researches a new type of production is developed — ramming mullite-corundum mass of MMKTS grade with zirconium-containing component. The ramming mass of developed composition is characterized by the following indices of physical and chemical properties: Al2O3 — not less than 87.0 %; SiO2— within the range of 5.0—7.0 %; ZrO2 — in the range of 1.0—3.0 %; Fe2O3 — not more than 1.0 %; P2O5 — in the range of 2.5—3.5 %; grain composition, mm — 3—0; cold crushing strength of samples from the mass after firing at a temperature of 1580 оC is not less than 80.0 N/mm2. The developed ramming mass is recommended for making monolithic linings of thermal units with a service temperature of up to 1700 оC, in particular induction channel and crucible furnaces operating under conditions of sharp temperature fluctuations that occur during cyclic operation or unforeseen stops of the unit.


2021 ◽  
Vol 316 ◽  
pp. 51-55
Author(s):  
Tamara I. Shishelova ◽  
Vadim V. Fedchishin ◽  
Mikhail A. Khramovskih

Rapid expansion of technologies poses higher requirements to structural materials and items made of them. Conventional materials are being replaced by composite materials (composites). Different additives enhancing the properties of initial materials are used as reinforcement fibers of composites. Utilization of micro-and nanosize particles for production of present-day materials is paid much attention to. Whiskers are among such materials. These crystals have high strength, high chemical and temperature resistance. But for rational utilization of whickers of different chemical composition in composite materials one should know their physical and chemical properties. Objectives of the paper: to study physical and chemical properties of whiskers in different compounds, their composition and structure; to prove experimentally the feasibility of utilizing whiskers as a reinforcement fiber of composite materials. Object of study: specimens of whiskers of silicon nitride (Si3N4), aluminum oxide (Al2O3), aluminum nitride (AlN), and mullite (Al6Si2O13). Methods of investigation: thermal study of specimens, study of mechanical properties and chemical strength, and IR-spectroscopy. Results of study: specimens of whiskers have been studied and their mechanical properties have been tabulated for comparison. Extensive thermal investigation was followed by deduction of regularities and identification of chemical properties of whiskers. IR-spectra of whiskers have been studied and conclusions on molecular composition and on presence of impurities in some whiskers have been made.


Author(s):  
Guili Ge ◽  
Lin Li ◽  
Dan Wang ◽  
Mingjian Chen ◽  
Zhaoyang Zeng ◽  
...  

Carbon dots (CDs) are a new type of carbon nanomaterial that have unique physical and chemical properties, good biocompatibility, low toxicity, easy surface functionalization, making them widely used in biological...


A so far unknown chlorophyll has been isolated from several strains of brown-coloured chlorobacteria and has been designated bacteriochlorophyll e . Comparison of the physical and chemical properties of the new chlorophyll with those of bacteriochlorophylls c and d ( Chlorbium chlorophylls) allows one to deduce its structural formula. The stereochemistry of the hydroxyethyl side chain of bacteriochlorophylls c, d and e can be determined by a modified Horeau analysis of these pigments, and the results thus obtained are in agreement with those derived from oxidative degradation experiments. The latter method allows one furthermore to prove the structure of bacteriochlorophylls c and d proposed by Holt, and to establish the absolute configuration at carbon atoms 7 and 8. The presence of a δ-methylsubstituent in bacteriochlorophylls c and e is unambiguously demonstrated by nuclear magnetic resonance.


1932 ◽  
Vol 5 (2) ◽  
pp. 110-116
Author(s):  
F. Kirchhof

Abstract The application of the long-known Friedel-Crafts reaction to rubber hydrocarbons led to a new type of condensation products which may be called provisionally aral cyclorubbers (“benzylidene rubbers”), since their benzylidene groups are probably condensed with the polyprene skeleton to cyclic systems. It would not have been foreseen without further work that rubber would form this type of condensation product with aral halides in the presence of aluminum chloride, since on the one hand benzyl chloride is known to form, by the action of aluminum chloride in the Friedel-Crafts reaction, an amorphous, apparently high molecular hydrocarbon of the empirical composition (C7H6)x, and on the other hand rubber in solution is transformed by the metal chlorides, especially aluminum chloride, into amorphous polycyclorubbers. Under definite conditions of condensation with aluminum chloride aral groups are combined with the skeleton of the rubber hydrocarbon with the formation of white to yellowish amorphous bodies which contain, in addition to a small proportion of organically combined chlorine, only carbon and hydrogen, and are therefore to be regarded as hydrocarbons. In their physical and chemical properties these substances resemble the already known amorphous substance of the empirical formula (C7H6)x, which doubtless is polybenzylidene, probably hexabenzylidene.


2014 ◽  
Vol 10 (2) ◽  
Author(s):  
Erwin Rommel ◽  
Yunan Rusdianto

Erwin Rommel1 & Yunan Rusdianto2Jurusan Teknik Sipil Fakultas Teknik Universitas Muhammadiyah MalangAlamat Korespondensi :Jalan Raya Tlogomas 246 Malang 65144email : [email protected] HP 08123314432ABSTRACTThe use of fly-ash as cementitious will be made to utilize physical and chemical properties offly-ash that has a dominan of silica and good of modulus fines. The use of steam curing will be donein this study which can speed up the cycle of making concrete. This is advantageous in the productionof precast concrete and velocity field construction.The research was conducted by making concrete cube 15x15x15 cm for 80 pieces and thentested the compressive strength and absorption of concrete. Achieve the quality of concrete madewith the provision of K600 with giving the fly-ash respectively 7.5%, 15% and 30% by weight ofcement.The results of the research obtained by the use of fly-ash as much as 7.5% as a cementitiousthat was given to the steam curing will provide the initial strength of concrete reached 47% ofcompressive strength at 28 days. While the effect of giving fly-ash in concrete has not seen absorptionsignificantly when compared to concrete without fly-ash.Key word : concrete, fly-ash, steam curing


2020 ◽  
Author(s):  
Vasily Artemov ◽  
Ece Uykur ◽  
Pavel Kapralov ◽  
Alexei Kiselev ◽  
Keith Stevenson ◽  
...  

Water at the solid-liquid interface exhibits an anomalous ionic conductivity and dielectric constant compared to bulk water. Both phenomena still lack a detailed understanding. Here, we report radiofrequency measurements and analyses of the electrodynamic properties of interfacial water confined in nano-porous matrices formed by diamond grains of various sizes, ranging from 5 nm to 0.5 μm in diameter. Contrary to bulk water, the charge-carrying protons/holes in interfacial water are not mutually screened allowing for higher mobility in the external electric field. Thus, the protonic conductivity reaches a maximum value, which can be five orders of magnitude higher than that of bulk water. Our results aid in the understanding of physical and chemical properties of water confined in porous materials, and pave the way to the development of new type of highly-efficient proton-conductive materials for applications in electrochemical energy systems, membrane separations science and nano-fluidics.


Author(s):  
А.В. БОРИСОВА ◽  
Ю.М. ЕЛИСЕЕВ ◽  
Н.М. ТУЗОВА ◽  
Н.В. ДОЛИБОЖКО ◽  
Е.Н. МАКЕЕВА

Разработана рецептура мягкого сыра с повышенным содержанием пищевых волокон за счет внесения отрубей. Для исследования взяты овсяные, пшеничные и ржаные отруби. Рассмотрено 3 способа внесения отрубей на разных технологических стадиях приготовления сыра: образец 1 – перед пастеризацией молока; образец 2 – перед внесением фермента; образец 3 – в готовое сырное зерно. Сыр изготовлен по технологии мягкого сыра (МС) типа «Славянский». Дозировка: на порцию сыра массой 50 гнеобходимо 3 готрубей без учета 3–5% потерь. Определено влагопоглощение овсяных отрубей (ОО) в воде и молоке, %: при температуре t 35°С – 670 и 446, при t 75°С – 840 и 560 соответственно. У пшеничных отрубей влагопоглощение ниже, %: при t 35°С – 760 и 506, при t 75°С – 800 и 533 в воде и молоке соответственно. Физико-химический анализ отрубей: массовая доля, %, пищевых волокон (ПВ) пшеничных, овсяных и ржаных отрубей составила соответственно 60,0; 66,6 и 63,3. Наибольшее содержание ПВ определено в ОО (66,6%). Максимальную оценку дегустаторов получил образец 2 МС. Равномерное распределение отрубей в образце 2 повлияло на его консистенцию и форму, которая сохранялась в течение 12 ч. Установлено, что для получения МС с повышенным содержанием ПВ необходимо добавлять ОО в количестве 6 г/100 г молочной смеси до внесения фермента в заквашенное молоко. Исследования показали возможность создания нового вида молочного продукта с заданными составом и свойствами. A recipe for soft cheese with an increased content of dietary fiber due to the introduction of bran has been developed. Oat, wheat and rye bran were taken for the study. Three ways of bran application at different technological stages of cheese preparation are considered: sample 1 – before pasteurization of milk; sample 2 – before introduction of the enzyme; sample 3 – in the finished cheese grain. The cheese is made using the technology of soft cheese of the «Slavyanskiy» type. Dosage: for a portion of cheese weighing 50 g, you need 3 g of bran without taking into account 3–5% of losses. Moisture absorption of oat bran in water and milk was determined, %: at t 35°C – 670 and 446, at t 75°C – 840 and 560, respectively. In wheat bran, moisture absorption is lower, %: at t 35°C – 760 and 506, at t 75°C – 800 and 533 in water and milk, respectively. Physical and chemical analysis of bran: the mass fraction, %, of dietary fibers of wheat, oat and rye bran was 60,0; 66,6 and 63,3, respectively. The highest content of dietary fiber is found in oat bran (66,6%). The maximum rating of tasters was given to sample 2. The uniform distribution of bran in sample 2 affected its consistency and shape, which was preserved for 12 h. It is established that to obtain soft cheese with a high content of dietary fiber, it is necessary to add oat bran in the amount of 6 g/100 g of the milk mixture before adding the enzyme to the fermented milk. Research has shown that it is possible to create a new type of dairy product with a given composition and properties.


2020 ◽  
Vol 143 ◽  
pp. 02027
Author(s):  
Zhao Bin ◽  
Cheng Yongqiang ◽  
Guo Cuilian ◽  
Liu Maoke ◽  
Yao Puyu ◽  
...  

Microplastics are attracting more and more attention as a new type of pollutant in the ecological environment. Microplastics are difficult to degrade because of their unique physical and chemical properties. Some microplastics adsorbed toxic chemicals (e.g. heavy metals or organic pollutants) will cause a series of toxicological effects in organisms. This paper summarized the research progress in microplastics from the aspects of the types, distribution, detection and the toxicological effects. In addition, future research directions were also proposed and discussed.


2013 ◽  
Vol 652-654 ◽  
pp. 765-769
Author(s):  
Qing Wang Liu ◽  
Yun Hai Zhu ◽  
Guang Zhi Han ◽  
Zhen Zhong Fan ◽  
Ji Gang Wang ◽  
...  

A cationic Gemini surfactant ethane-1, 2-bis (Cetyl dimethyl brominated ammonium), denoted 16-2-16 was synthesized from ethane and Hexadecyl dimethyl amine. The properties of the product were characterized, and the physical and chemical properties were determined. The results showed that the synthetic product was the target product, and its surface tension was 3.4×10-4N/m, and the CMC was 2.2×10-4mol/L at 25°C. At the same time, its synergistic effect with common surfactants was studied; the results showed that the synthetic product had good synergic effect.


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