PMID- 34504256
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20210914
IS  - 2045-2322 (Electronic)
IS  - 2045-2322 (Linking)
VI  - 11
IP  - 1
DP  - 2021 Sep 9
TI  - Study on polyethylene-based carbon fibers obtained by sulfonation under 
      hydrostatic pressure.
PG  - 18028
LID - 10.1038/s41598-021-97529-4 [doi]
LID - 18028
AB  - Polyethylene based carbon fibers were studied using high density 
      polyethylene(HDPE) fibers and linear low density polyethylene(LLDPE) fibers with 
      various melt flow index. The draw ratio of the polyethylene fibers and the 
      sulfonation mechanism were investigated under hydrostatic pressures of 1 and 
      5 bar in the first time. The influence of the melt flow index of polyethylene and 
      types of polyethylene fibers on the sulfonation reaction was studied. Carbon 
      fibers were prepared through the sulfonation of LLDPE fibers possessing side 
      chains with a high melt flow index. The polyethylene fibers, which exhibited 
      thermoplastic properties and plastic behavior, were cross-linked through the 
      sulfonation process. Their thermal properties and mechanical properties changed 
      to thermoset properties and elastic behavior. Although sulfonation was performed 
      under a hydrostatic pressure of 5 bar, it was difficult to convert the highly 
      oriented polyethylene fibers because of their high crystallinity, but partially 
      oriented polyethylene fibers could be converted to carbon fibers. Therefore, the 
      effect of fiber orientation on fiber crosslinking, which has not been reported in 
      previous literature, has been studied in detail, and a new method of hydrostatic 
      pressure sulfonation has been successful in thermally stabilizing polyethylene 
      fiber. Hydrostatic sulfonation was performed using partially oriented LLDPE 
      fibers with a melt flow index of 20 at 130  degrees C for 2.5 h under a hydrostatic 
      pressure of 5 bar. The resulting fibers were carbonized under the following 
      conditions: 1000  degrees C, 5  degrees C/min, and five minutes. Carbon fibers with a tensile 
      strength of 2.03 GPa, a tensile modulus of 143.63 GPa, and an elongation at break 
      of 1.42% were prepared.
CI  - (c) 2021. The Author(s).
FAU - Eun, Jong Hyun
AU  - Eun JH
AD  - Department of Fiber System Engineering, Yeungnam University, Gyeongsan, 712-749, 
      Republic of Korea. anselm00@ynu.ac.kr.
FAU - Lee, Joon Seok
AU  - Lee JS
AD  - Department of Fiber System Engineering, Yeungnam University, Gyeongsan, 712-749, 
      Republic of Korea. leejs@ynu.ac.kr.
LA  - eng
GR  - 20000207/Ministry of Trade, Industry and Energy/
PT  - Journal Article
DEP - 20210909
PL  - England
TA  - Sci Rep
JT  - Scientific reports
JID - 101563288
SB  - IM
PMC - PMC8429680
COIS- The authors declare no competing interests.
EDAT- 2021/09/11 06:00
MHDA- 2021/09/11 06:01
PMCR- 2021/09/09
CRDT- 2021/09/10 06:46
PHST- 2021/05/25 00:00 [received]
PHST- 2021/08/19 00:00 [accepted]
PHST- 2021/09/10 06:46 [entrez]
PHST- 2021/09/11 06:00 [pubmed]
PHST- 2021/09/11 06:01 [medline]
PHST- 2021/09/09 00:00 [pmc-release]
AID - 10.1038/s41598-021-97529-4 [pii]
AID - 97529 [pii]
AID - 10.1038/s41598-021-97529-4 [doi]
PST - epublish
SO  - Sci Rep. 2021 Sep 9;11(1):18028. doi: 10.1038/s41598-021-97529-4.