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The use of bio-based materials for production of biocomposites is of interest due to their low cost, abundance and the fact that they are renewable and biodegradable. In this work, an epoxy matrix was produced from residual soybean oil and subsequently used in the preparation of composites reinforced with spent coffee grounds (SCG) fiber. SCG were chemically treated with alkaline hydrogen peroxide...
Carbon-fiber-reinforced plastics (CFRP) offer great potential for lightweight construction of technical products due to their high stiffness and strength combined with their low weight. Due to their outstanding mechanical characteristics, CFRP are increasingly used for high-volume production i.e. for the automotive industry. However, the industrial application of these materials results in high costs...
The present work describes the production of the ultrapure water using Continuous Electro-deionization (CEDI) method. The CEDI unit consist of ion exchange membranes, Mixed Bed-12 (MB-12) ion exchange resin and electrodes to remove ion impurities from feed water. The product water from the RO unit is supplied to the CEDI unit. The Quality of the ultra-pure water is determined by the amount of ions...
This article outlines an aim, a position and a need of engineering pedagogy tuition in university field of study technical profession subject tuition. Engineering pedagogy in practice and research realization in the Slovak Republic and in the Czech Republic. At the same time we try to show the place in international company for engineering pedagogy. Further benefit deals with common research and production...
Currently, composite materials are considered like progressive materials 21st century, they can solve many of the current problems with light, faster and more efficient materials, components and systems. We have to take full advantage of the benefits from the application of composite of materials, not enough for us just the research and development of new products, but we also have other professionally...
Composite materials in terms of fiber-reinforced plastics (FRP) are used as lightweight materials in various products for example airplanes or helicopters. The manufacturing of high performance carbon fiber-reinforced plastic (CFRP) parts in the aeronautics industry often relies on preimpregnated fibers (prepregs) which are cured in an autoclave. In this context, the production output mainly is determined...
Some factors was discussed, including solid content of phenol formaldehyde, adhesive impregnation time, moisture content of bamboo bundle and cross section area of bamboo bundle. It was showed that: the optimal process conditions is: solid content of phenol formaldehyde for 25%, adhesive impregnation time for 14min, moisture content of bamboo bundle for 11%, cross section area of bamboo bundle for...
Aspen has traditionally been used as the only feedstock for OSB panel production in Canada over the past 30 years. With aspen becoming less available to most Canadian OSB mills, the OSB industry has to use alternative wood species such as white birch and sugar maple as a partial substitute for aspen in OSB production. This has a significant influence on OSB panel performance. To address this issue,...
We recognize the increased availability of environmentally friendly thermoplastics on the market today. Besides pure bio-based materials like Poly(lactic acid) (PLA) and Polyethylene (PE), there are also engineering plastics available which are partially derived from renewable resources. For example many Polyamide grades can be found that are partially based on castor oil. The use renewable resources...
In this paper, 26 kinds of macroporous resins were screened for their abilities to absorb inhibitory substances against aflatoxin biosynthesis from the fermentation supernatant of Bacillus subtilis Hitwh-B05. DM130 resin was chosen as the best according to its higher adsorption capacities for inhibitory substances but less for pigments than the other 25 resins. Its adsorption capacities of inhibitory...
Electrodeionization(EDI) as a combination of electrodialysis(ED) and ion exchange(IE), has been gradually applied in pharmaceutical, electronic, electric power, biological technology, etc. In this paper, the development history of new technology EDI is reviewed firstly, then configuration and working principles and economic and technological characteristics of EDI are briefly illustrated. What's more,...
Waste cooking oil is a potential alternative of refined vegetable oil for biodiesel production due to its low cost and elimination of its disposal problem. The concentration of free fatty acids (FFAs) in WCO dictates the type of chemical treatment required for biodiesel production: a single esterification reaction is considered at high content of FFAs, whereas, a combination of estrification and transestrification...
The polymerization rate of vinyl acetate is extremely important qualitative index and processing parameter, but it is inconvenient being measured directly and real-timely, therefor, in this paper, soft sensor modeling method based on Least Square SVM(LS-SVM)is proposed and cross validation method is used to select hyper-parameter of LS-SVM model. It is applied to the soft sensor of the vinyl acetate...
The best resin which is used to recovery lipoic acid in lipoic acid wastewater is NG-16 macroporous adsorption resin. The result is determined by dynamic adsorption experiments. The optimal operation conditions are as follows: pH value of 5-5.5, at room temperature, adsorption flux of 3BV/h, double-column series disposing volume is 25BV/batch; at 303K, the resin is desorbed by 3BV methanol+2BV water,...
Automotive friction plate processing technology were reviewed and put forward a low-temperature processing method of cementation. At the same time does experimental analysis and theoretical research to the problems of the prelude to the new processing methods. That have obtained the best process method of and parameters, base on conducting a large number of experiments, and provides the data to support...
Although unique properties such as creation of nondiffracting beams and as a result the large focal depth have been exhibited from axicon lenses, and numerous important applications in optical signal processing and imaging have been demonstrated, axicons of dimensions smaller than a hundred of micrometers have not yet been reported. It is technically quite challenging for the currently available technologies...
The production of electronic products is one of the world's fasting growing industries today. Due to this phenomena, the amount of electronic waste generated increases proportionately with the production. The growing numbers of uses of plastic products in this sector contribute to electronic plastic waste generated. From the management of solid waste aspect, the production of electronic plastic waste...
The competition that manufacturing industries are facing in today's economic environment is tremendous. Nowadays international markets ask for better and cheaper products with a higher `innovative content'. In order to achieve these goals the manufacturing industry has to resort to computer aided-driven, practices and tools that shorten the overall product development cycle and increase the product...
Artificial marble products usually include sinks and kitchen equipments. Frequent accidents of consumer injuries caused by fallen sinks have been reported. This study aims to enhance the safety of marble sink by taking into the consideration of not increasing the cost of production and materials, and by applying the parameter design of Taguchi Method in selecting six controllable factors: defoaming...
In order to solve the production and transportation problems of large diameter FRP tank, the numerical control winding machine system was developed to realize field winding. The mechanical parts of the system can be conveniently disassembled and assembled in field. Based on the electronic gear control mode the embedded motion controller is adopted to realize synchronous motion control. In this paper,...
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