Technical considerations on the 3D printing components with DLP 3D printing process with ecological resin

The purpose of this work is to analyse the technological aspects of the realization of components by 3D printing for the production of plan parts for experimental devices or stands. The author of this work envisages the realization of flat elements to which it can be determined how the organic resin material behaves when printing 3D with additive DLP technology. The work is structured in 5 chapters. In the first chapter, an analysis of how to make the plan elements by the additive DLP technology specific to the experimental programme adopted in this paper. The analysis will be carried out both constructively and functionally taking into account possibilities for designing components and making them. Chapter two is allocated to ordering technological parameters for 3D printing generation of parts defining the main technical parameters for generating them with ecological resin. The next chapter is allocated to analysing how to carry out the printer command program and check the structure of the element. In the four chapter, the dimensional measurement and control programme with dimensional and optical is presented. The last chapter is allocated to conclusions and comparisons from a technological point of view compared to other specific technologies for generating the analysed elements.

Batch and fixed-bed column adsorption of tetrabromobisphenol A onto metal organic resin: equilibrium, kinetic and mechanism studies

MORs were prepared through fabricating MOFs and resin for effective TBBPA removal in fix-bed column experiments from contaminated waters.

Two-Step Elution Recovery of Cyanide Platinum Using Functional Metal Organic Resin

A novel functional ion-exchange/adsorption metal organic resin (MOR), TEBAC-HKUST-1, was prepared and characterized. Ethanedithiol was used as the grafting agent to introduce thiol groups onto HKUST-1, and 4-vinylbenzyl chloride was then grafted onto SH-HKUST-1 using thiol groups. Finally, the quaternary ammonium functional group was immobilized onto the carrier by performing a quaternization reaction. The structure and property of TEBAC-HKUST-1 MOR were characterized by TGA, N2 adsorption–desorption, FTIR, SEM, and XRD. TEBAC-HKUST-1 MOR was used to remove metal cyanide complexes from wastewater. The adsorption was rapid, and the metal cyanide complexes including Pt(CN)42−, Co(CN)63−, Cu(CN)32−, and Fe(CN)63− were removed in 30 min. TEBAC-HKUST-1 MOR exhibited a high stability in neutral and weak basic aqueous solutions. Furthermore, Pt(II) could be efficiently recovered through two-step elution. The recovery rate of Pt(II) for five cycles were over 92.0% in the mixture solution containing Pt(CN)42−, Co(CN)63−, Cu(CN)32−, and Fe(CN)63−. The kinetic data were best fitted with the pseudo second-order model. Moreover, the isothermal data were best fitted with the Langmuir model. The thermodynamic results show that the adsorption is a spontaneous and exothermic process. TEBAC-HKUST-1 MOR not only exhibited excellent ability for the rapid removal of metal cyanide complexes, but also provided a new idea for the extraction of noble metals from cyanide-contaminated water.

Fabrication and Analysis of Thermal Insulation Boards from Rice Husk

There is an increased awareness to preserve the environment in the present day society. Rice Husk (RH),is the widely available agricultural wastes and is a serious concern for the environment. It is a potential material for use as alternative material in the construction and insulation industry. The particle board made from rice husk (RH) or rice husk ash (RHA), bonded by resin under the application of pressure and temperature. Urea formaldehyde is the organic resin used in general for interior use whereas phenol formaldehyde for external disclosure. The said resins are preferred for their water-resistant properties and better binding strength. The present study investigates the potential of rice husk reinforced boards by experimenting the different compositions and thicknesses. The objective is to perform a thermal analysis of the processed Rice husk boards. Boards made from rice husk are biodegradable unlike glass wool & other synthetic insulations. After experimenting on different fabrication conditions, six samples were finalized and were tested for physical and thermal viability in their applications. This study found that by adding ash of rice husk, the density of board decreases with respect to the board of same weight and consisting of rice husk only. Moisture Content is higher in case of boards with RHA but is within permissible limits. RHA reinforced boards have improved thermal properties, which is desirable in case of insulation boards.