期刊
ACS APPLIED MATERIALS & INTERFACES
卷 8, 期 5, 页码 3200-3207出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.5b10720
关键词
neutron scattering lignin; carbon fiber; solution assembly; poly(ethylene oxide)
资金
- Department of Energy, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering
- Laboratory Directed Research and Development Program of Oak Ridge National Laboratory [DE-AC05-00OR22725]
- U.S. Department of Energy's Office of Biological and Environmental Research [FWP ERKP291]
- Scientific User Facilities Division, Office of Basic Energy Sciences, U.S. Department of Energy
- National Science Foundation [DMR-0944772]
Carbon fiber produced from lignin has recently become an industrial scalable product with applications ranging from thermal insulation to reinforcing automobile bodies. Previous research has shown that mixing 1-2 wt %, of poly(ethylene oxide) (PEO) with the lignin before fiber formation can enhance the properties of the final carbon fibers. The research reported here determines the impact of adding PEO to a lignin solution on its assembly, focusing on the role of the lignin structure on this assembly process. Results indicate the addition of PEO anisotropically directs the self assembly of the hardwood and softwood lignin by lengthening the cylindrical building blocks that make up the larger global aggregates. On the other hand, results from an annual lignin exhibit a shapeless, more complex structure with a unique dependence on the PEO loading. These results are consistent with improved carbon fibers from solutions of lignin that include PEO, as the local ordering and directed assembly will inhibit the formation of defects during the carbon fiber fabrication process.
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