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. Nowacki 2002 Temperature changes in polyamide subjected to low cyclic deformation Infrared Physics and Technology 43 183 – 186
Machinability study on precision turning of PA66 polyamide with and without glass fiber reinforcing Materials & Design 30 2 228 – 234 . [11
, with coatings based on epoxy resins, polyamide compounds, and fluoroplastic. Zang et al. [ 2 ] in their research develop scalable and reliable organogel coatings for sustainable protection of equipment surfaces from scale deposits, which can be used
materials [ 11–14 ]. In order to improve the antibacterial activity of graphene, some research groups have prepared its nanocomposites with different polymers such as chitosan [ 15, 16 ], polyamide [ 17 ], polyethyleneimine (PEI) [ 18 ] or poly(vinyl alcohol
“jewel barberry”. Ten grams of samples were packed in polyamide film. The drying time of the sun method was 336 h, until the desired humidity 18–20% was reached. The outside temperatures were minimum 0 ± 2 °C and maximum 25 ± 2 °C during 24 h ( Ahmadi
In this study, pressed apricot (Prunus armeniaca L.) juice was concentrated using complex membrane technology with different module combinations: UF-RO-OD, UF-RO-MD, UF-NF-OD and UF-NF-MD. In case of the best combination a cross-flow polyethylene ultrafiltration membrane (UF) was applied for clarification, after which preconcentration was done using reverse osmosis (RO) with a polyamide membrane, and the final concentration was completed by osmotic distillation (OD) using a polypropylene module. The UF-RO-OD procedure resulted in a final concentrate with a 65-70 °Brix dry solid content and an excellent quality juice with high polyphenol content and high antioxidant capacity.Nanofiltration (NF) and membrane distillation (MD) were not proper economic solutions.The influence of certain operation parameters was examined experimentally. Temperatures of UF and RO were: 25, 30, and 35 °C, and of OD 25 °C. Recycle flow rates were: UF: 1, 1.5, and 2 m3 h−1; RO: 200, 400, and 600 l h−1; OD: 20, 30 and 40 l h−1. The flow rates in the module were expressed by the Reynolds number, as well. Based on preliminary experiments, the transmembrane pressures of UF and RO filtration were 4 bar and 50 bar, respectively. Each experimental run was performed three times. The following optimal operation parameters provided the lowest total cost: UF: 35 °C, 2 m3 h−1, 4 bar; RO: 35 °C, 600 l h−1, 50 bar; OD: 20, 30 and 40 l h−1; temperature 25 °C.In addition, experiments were performed for apricot juice concentration by evaporation, which technique is widely applied in the industry using vacuum and low temperature.For description the UF filtration, a dynamic model and regression by SPSS 14.0 statistics software were applied.
–199. Kalacska, G., Keresztes, R., Zsidai, L. (2002) Self-lubricating polyamides. Intertribo . Stara Lesna. 194–198. Kalacska, G., Keresztes, R., Debaets, P. (2003) Dynamic tribological testing of polymers. ICCE10. (Tenth annual
water was used for rinsing once the concentration step concluded. Table 1. The attributes of the used membranes Membrane Type Model Permeate Flow m3/day (GPD) X20 X20 Fully Aromatic Polyamide-Urea Advanced Composite Membrane TRISEP 4040-X20-TSA 9.3 (2
obtained curds were divided into blocks of 7 cm 3 and put in brine (14% NaCl) for 14–16 h at room temperature. Cheeses were vacuum-packed (with a composition of Polyethylen/Orevac/Polyamide (44/15/20 µm)) and stored at 4 °C for 90 days. 2.3 Determination
against time” kinetic data . Russian Journal of Physical Chemistry A , 62 ( 1525 ): e7 . Watt , E. , Abdelwahab , M.A. , Mohanty , A.K. , and Misra , M. ( 2020 ). Biocomposites from biobased polyamide 4, 10 and waste corn cob based bio
