PMID- 30999575
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20200929
IS  - 2073-4360 (Electronic)
IS  - 2073-4360 (Linking)
VI  - 11
IP  - 4
DP  - 2019 Apr 17
TI  - Study on Surface Properties of Aramid Fiber Modified in Supercritical Carbon 
      Dioxide by Glycidyl-POSS.
LID - 10.3390/polym11040700 [doi]
LID - 700
AB  - The outstanding diffusivity and permeability of supercritical carbon dioxide 
      (scCO(2)) are extremely beneficial for grafting reaction. In this work, aramid 
      fibers (AF) are modified in scCO(2) by glycidyl-polyhedral oliomeric 
      silsesquioxane (POSS) with 2-ethyl-4-methylimidazole (2E4MZ) on the basis of 
      cleaning with acetone. The surface morphology and chemical structure of the 
      modified AF were measured and characterized by Fourier transform infrared 
      spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), Scanning electron 
      microscope (SEM), Thermogravimetric (TG), and Atomic force microscope (AFM). The 
      interfacial shear strength (IFSS) was measured by a micro-bond pull-out test, 
      then the modified AF/EP composites were prepared and the interlaminar shear 
      strength (ILSS) was characterized. Research has shown that some of the 
      glycidyl-POSS molecular chains permeated into the surface of the fiber and 
      grafted onto the surface of the AF after modification, and the other 
      glycidyl-POSS self-assembled on the surface of the fiber. XPS indicated the 
      introduction of C-O and -COO-, which confirmed the existence of chemical 
      reactions between AF and glycidyl-POSS. AFM and SEM images revealed that 2E4MZ, 
      not only promoted the grafting reaction of glycidyl-POSS, but also intensified 
      the self-assembly of glycidyl-POSS, both of which increased the roughness of the 
      fiber. A monofilament tensile test and micro-bond pull-out test showed that there 
      was a negative effect on the tensile strength after scCO(2) processing. The 
      tensile strength of modified AF, with glycidyl-POSS, increased the highest 
      strength of 25.7 cN dtex(-1), which was 8% higher than that of pristine AF. The 
      improvement of ILS roughness and the polar chemical groups produced in grafting 
      reaction. These results indicated that AF, treated in scCO(2), with 
      glycidyl-POSS, which is a suitable way of fiber modification, can significantly 
      improve the surface adhesion of AF reinforced composites.
FAU - Li, Yang
AU  - Li Y
AD  - Department of Polymer Material and Engineering, College of Materials and 
      Metallurgy, Guizhou University, Guiyang 550025, China. 20130214@git.edu.cn.
AD  - School of Materials Science and Metallurgy Engineering, Guizhou Institute of 
      Technology, Guiyang 550003, China. 20130214@git.edu.cn.
FAU - Luo, Zhu
AU  - Luo Z
AUID- ORCID: 0000-0001-8848-9354
AD  - Department of Polymer Material and Engineering, College of Materials and 
      Metallurgy, Guizhou University, Guiyang 550025, China. zluo1@gzu.edu.cn.
FAU - Yang, Le
AU  - Yang L
AD  - Department of Polymer Material and Engineering, College of Materials and 
      Metallurgy, Guizhou University, Guiyang 550025, China. leiyang15@gzu.edu.cn.
FAU - Li, Xiaolong
AU  - Li X
AD  - Department of Polymer Material and Engineering, College of Materials and 
      Metallurgy, Guizhou University, Guiyang 550025, China. withoutname635@163.com.
FAU - Xiang, Kun
AU  - Xiang K
AD  - School of Physics and Electronic Science, Guizhou Education University, Guiyang 
      550018, China. gzsfxyxk@163.com.
LA  - eng
GR  - 51763004/National Natural Science Foundation of China/
PT  - Journal Article
DEP - 20190417
PL  - Switzerland
TA  - Polymers (Basel)
JT  - Polymers
JID - 101545357
PMC - PMC6523227
OTO - NOTNLM
OT  - aramid fiber
OT  - glycidyl-POSS
OT  - graft reaction
OT  - interfacial strength
OT  - supercritical CO2 processing
COIS- The authors declare no conflict of interest.
EDAT- 2019/04/20 06:00
MHDA- 2019/04/20 06:01
PMCR- 2019/04/17
CRDT- 2019/04/20 06:00
PHST- 2019/03/06 00:00 [received]
PHST- 2019/03/27 00:00 [revised]
PHST- 2019/04/08 00:00 [accepted]
PHST- 2019/04/20 06:00 [entrez]
PHST- 2019/04/20 06:00 [pubmed]
PHST- 2019/04/20 06:01 [medline]
PHST- 2019/04/17 00:00 [pmc-release]
AID - polym11040700 [pii]
AID - polymers-11-00700 [pii]
AID - 10.3390/polym11040700 [doi]
PST - epublish
SO  - Polymers (Basel). 2019 Apr 17;11(4):700. doi: 10.3390/polym11040700.