TY - GEN
T1 - The effectivity of pre-treatment process of recycled HDPE based on the mechanical recycling method
AU - Nurtabina, Aisha
AU - Manaf, Azwar
AU - Hafizah, Masayu E.
AU - Andreas,
N1 - Funding Information:
The authors would like to thank profusely for the support of the Materials Science Graduate Program of Universitas Indonesia for the research facilities provided. We also thank the Directorate of Research and Development Universitas Indonesia for the financial support provided under program Grants of International Publication Indexed (PUTI) Proceeding under contract number NKB-1018/UN2.RST/HKP.05.00/2020. The authors were also grateful to the AUN/SEED-NET for the financial support during the RCM-ICMEM 2020 Conference.
Publisher Copyright:
© 2021 Author(s).
PY - 2021/11/11
Y1 - 2021/11/11
N2 - A study of the washing process for recycling HDPE (High-Density Polyethylene) materials was reported. The materials used are taken from one source and the same type, namely white, used packaging bottles. The study begins with washing the HDPE waste through a series of washing processes, using NaOH 48% solution and followed by water rinsing. In this study, samples of used HDPE bottles with the same color were washed at two different temperatures, at 27°C (room temperature) and 50°C, for 30 minutes. Characterization of the washing water was carried out to measure pH, conductivity, and alkalinity. The results show that the difference in washing water temperature does not significantly affect the resulting pH, while the conductivity of washing water at room temperature was found to reach lower conductivity with fewer rinsing process than washing water with a temperature of 50°C. The 0% alkalinity is found in the second and fifth rinse for washing water at the temperature of 27°C and 50°C, respectively. Before and after the washing procedure, the samples were subjected to a mechanical test using the Leeb Hardness Tester to see whether the washing process affected the sample's mechanical properties. The result for Leeb Hardness Tester shows an increasing value from 540.4 HL for the sample before treatment to 577.8 HL and 586.8 HL after treatment with a temperature range of 27°C and 50°C, respectively. Thermal analysis was carried out by DSC (Differential Scanning Calorimetry) and TGA (Thermogravimetric Analysis). The curve of DSC results showed no significant difference in material properties after five times the washing process. Characterization of the sample was also carried out by FTIR (Fourier Transform Infrared Spectroscopy) in the range from 4000 to 550cm-1 to identify the effect of heat on the polymer chains. Both the treated and untreated samples showed the same results.
AB - A study of the washing process for recycling HDPE (High-Density Polyethylene) materials was reported. The materials used are taken from one source and the same type, namely white, used packaging bottles. The study begins with washing the HDPE waste through a series of washing processes, using NaOH 48% solution and followed by water rinsing. In this study, samples of used HDPE bottles with the same color were washed at two different temperatures, at 27°C (room temperature) and 50°C, for 30 minutes. Characterization of the washing water was carried out to measure pH, conductivity, and alkalinity. The results show that the difference in washing water temperature does not significantly affect the resulting pH, while the conductivity of washing water at room temperature was found to reach lower conductivity with fewer rinsing process than washing water with a temperature of 50°C. The 0% alkalinity is found in the second and fifth rinse for washing water at the temperature of 27°C and 50°C, respectively. Before and after the washing procedure, the samples were subjected to a mechanical test using the Leeb Hardness Tester to see whether the washing process affected the sample's mechanical properties. The result for Leeb Hardness Tester shows an increasing value from 540.4 HL for the sample before treatment to 577.8 HL and 586.8 HL after treatment with a temperature range of 27°C and 50°C, respectively. Thermal analysis was carried out by DSC (Differential Scanning Calorimetry) and TGA (Thermogravimetric Analysis). The curve of DSC results showed no significant difference in material properties after five times the washing process. Characterization of the sample was also carried out by FTIR (Fourier Transform Infrared Spectroscopy) in the range from 4000 to 550cm-1 to identify the effect of heat on the polymer chains. Both the treated and untreated samples showed the same results.
UR - http://www.scopus.com/inward/record.url?scp=85119377636&partnerID=8YFLogxK
U2 - 10.1063/5.0067941
DO - 10.1063/5.0067941
M3 - Conference contribution
AN - SCOPUS:85119377636
T3 - AIP Conference Proceedings
BT - Proceedings of the 13th AUN/SEED-Net Regional Conference on Materials, RCM 2020 and the 1st International Conference on Materials Engineering and Manufacturing, ICMEM 2020
A2 - Norcahyo, Rachmadi
A2 - Yokozeki, Tomohiro
A2 - Noor, Ahmad Fauzi Mohd
A2 - Chua, Alvin Y.
A2 - Soedasrsono, Johny Wahyuadi
PB - American Institute of Physics Inc.
T2 - 13th AUN/SEED-Net Regional Conference on Materials 2020, RCM 2020 and the 1st International Conference on Materials Engineering and Manufacturing, ICMEM 2020
Y2 - 27 January 2021 through 28 January 2021
ER -