PMID- 38006134
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20231127
IS  - 2073-4360 (Electronic)
IS  - 2073-4360 (Linking)
VI  - 15
IP  - 22
DP  - 2023 Nov 15
TI  - Investigating the Aging Behavior of High-Density Polyethylene and Polyketone in a 
      Liquid Organic Hydrogen Carrier.
LID - 10.3390/polym15224410 [doi]
LID - 4410
AB  - Hydrogen is recognized as a significant potential energy source and energy 
      carrier for the future. On the one hand, storing hydrogen is a challenging task 
      due to its low volumetric density, on the other hand, a particular type of 
      hydrogen in the form of a liquid can be used to store large quantities of 
      hydrogen at ambient conditions in thermoplastic tanks. But storing hydrogen in 
      this form for a long time in polymer tanks affects the physical and chemical 
      properties of the liner. In the current automotive industry, high-density 
      polyethylene (HDPE) has already been used in existing fuel tank applications. 
      However long-term exposure to fuels leads to the permeation of hydrocarbons into 
      the polymers, resulting in a loss of mechanical properties and reducing the 
      efficiency of fuel cells (FC) in automotive applications. Additionally, facing 
      material shortages and a limited supply of resin leads to an increase in the cost 
      of the material. Therefore, an alternative material is being searched for, 
      especially for hydrogen fuel tank applications. In this study, two 
      semi-crystalline thermoplastics, HDPE and polyketone (POK), were compared, which 
      were exposed to a selected liquid organic hydrogen carrier (LOHC) at 25  degrees C and 60 
       degrees C for up to 500 h in an enclosed chamber, to measure their fuel up-take. A short 
      analysis was carried out using differential scanning calorimetry (DSC), 
      thermogravimetric analysis (TGA), Fourier transform infrared spectroscopy (FTIR), 
      and mechanical testing to understand the influence of the LOHC on the polymer 
      over time. Fuel sorption and tensile properties showed a plasticizing effect on 
      HDPE. The material degradation was more pronounced for the aged samples of HDPE 
      in comparison to POK. As expected, thermal aging was increased at 60  degrees C. The fuel 
      absorption of POK was lower compared to HDPE. A slight increase in crystallinity 
      was observed in POK due to the aging process that led to changes in mechanical 
      properties. Both HDPE and POK samples did not show any chemical changes during 
      the aging process in the oven at 25  degrees C and 60  degrees C.
FAU - Surisetty, Jyothsna
AU  - Surisetty J
AD  - Polymer Processing, Department of Polymer Engineering and Science, 
      Montanuniversitat Leoben, 8700 Leoben, Austria.
FAU - Sharifian, Mohammadhossein
AU  - Sharifian M
AUID- ORCID: 0000-0001-8446-5048
AD  - Chemistry of Polymeric Materials, Department of Polymer Engineering and Science, 
      Montanuniversitat Leoben, 8700 Leoben, Austria.
FAU - Lucyshyn, Thomas
AU  - Lucyshyn T
AUID- ORCID: 0000-0003-0048-0334
AD  - Polymer Processing, Department of Polymer Engineering and Science, 
      Montanuniversitat Leoben, 8700 Leoben, Austria.
FAU - Holzer, Clemens
AU  - Holzer C
AUID- ORCID: 0000-0001-5149-7895
AD  - Polymer Processing, Department of Polymer Engineering and Science, 
      Montanuniversitat Leoben, 8700 Leoben, Austria.
LA  - eng
PT  - Journal Article
DEP - 20231115
PL  - Switzerland
TA  - Polymers (Basel)
JT  - Polymers
JID - 101545357
PMC - PMC10674436
OTO - NOTNLM
OT  - LOHC (perhydro-benzyltoluene)
OT  - POK
OT  - aging behavior
OT  - fuel uptake
OT  - long-term storage
COIS- The authors declare no conflict of interest.
EDAT- 2023/11/25 12:47
MHDA- 2023/11/25 12:48
PMCR- 2023/11/15
CRDT- 2023/11/25 01:31
PHST- 2023/10/11 00:00 [received]
PHST- 2023/11/07 00:00 [revised]
PHST- 2023/11/10 00:00 [accepted]
PHST- 2023/11/25 12:48 [medline]
PHST- 2023/11/25 12:47 [pubmed]
PHST- 2023/11/25 01:31 [entrez]
PHST- 2023/11/15 00:00 [pmc-release]
AID - polym15224410 [pii]
AID - polymers-15-04410 [pii]
AID - 10.3390/polym15224410 [doi]
PST - epublish
SO  - Polymers (Basel). 2023 Nov 15;15(22):4410. doi: 10.3390/polym15224410.