دانلود رایگان مقاله لاتین و شناسایی لیگنین فیبر کربن از سایت الزویر
عنوان فارسی مقاله:
سنتز و شناسایی لیگنین فیبر کربن و کامپوزیت
عنوان انگلیسی مقاله:
Synthesis and characterization of lignin carbon fiber and composites
سال انتشار : 2016
برای دانلود رایگان مقاله و شناسایی لیگنین فیبر کربن اینجا کلیک نمایید.
مقدمه انگلیسی مقاله:
1. Introduction
Carbon fiber composites due to their high strength to weight ratio are of interest to a wide range of industries including wind energy, aerospace, and automotive. Carbon-fiber reinforced polymers (CFRP) are of particular interest to the automotive industry because of recent US legislation requiring increased fuel economies of 35.5 mpg for 2017 and 54.5 mpg for 2025 [1]. It is estimated that CFRP's could reduce the weight of a car by 60%, which will dramatically increase fuel economy. Automotive companies are reluctant to switch to CFRP due to the high initial cost of materials [2]. This has led to a large effort to explore options for manufacturing inexpensive carbon fiber. A large portion of the overall cost of carbon fiber based composites comes from the development and processing of the precursor to make the reinforcement. Most carbon fibers used for commercial and industrial applications comes from petroleumbased precursors such as polyacrylonitrile (PAN) and mesophase pitch (MPP). These precursors are relatively expensive and contribute to more than 50% of the manufacturing costs of a carbon fiber. Several other polymers, such as lignin and silk, have been targeted as possible replacements for carbon fiber precursors [3]. There is a growing interest in lignin, due to its potential abundance, high carbon content, renewable nature, and low cost as a byproduct of the paper industry and biofuel extraction processes. Lignin, a complex, three-dimensional network polymer, iscomprised of aromatic alcohols with differing degrees of methoxy substitution based on parent plant material. In this paper, authors use a modified organosolv fractionation process to produce lignin from an emerging bioenergy crop, switchgrass, which possesses high purity and desirable flow/ rheological/extrusion characteristics for fiber processing [5e7]. Results reported in this paper are: (1) synthesis of organosolv fractionated lignin fibers, (2) suitable steps to stabilize and carbonize them, and (3) characterization techniques to determine mechanical, interfacial, and structural parameters. Important structure-property relationship associated with the mechanical behavior of the single fibers subjected to tensile loading was determined using a highly precise nano-tensile testing system. Carbonized fibers were characterized using x-ray diffraction (XRD) for crystallinity, and scanning electron microscopy (SEM) for morphology. Using 100% lignin based carbon fibers, quasi-isotropic Vacuum Assisted Resin Transfer Molding (VARTM) bio-epoxy based composites were also produced and mechanical properties were evaluated utilizing three dimensional digital image correlation (3DDIC) to identify failure modes corresponding to these switchgrass based lignin composite panels produced for the first time by the authors.
برای دانلود رایگان مقاله و شناسایی لیگنین فیبر کربن اینجا کلیک نمایید.
کلمات کلیدی:
Characterization of electrospun lignin based carbon fibers: AIP ... aip.scitation.org/doi/abs/10.1063/1.4918499 by V Poursorkhabi - 2015 - Related articles The production of lignin fibers has been studied in order to replace the need for petroleum based precursors for carbon fiber production. In addition to its positive ... Preparation and Characterization of Modified Soda Lignin with ... - MDPI www.mdpi.com/1996-1944/9/10/822/pdf by F Zhang - 2016 - Related articles Oct 7, 2016 - Abstract: Soda lignin does not have thermal flowing characteristics and it is ... carbon fibers (CFs), as one of the fibrous carbon materials, have ... Preparation and Characterization of High Surface Area Activated ... www.mdpi.com/2073-4360/8/10/369/pdf by J Lin - 2016 - Related articles Oct 18, 2016 - The pore characterization and adsorption property of ACFs were investigated. ... Keywords: lignin; activated carbon fibers; porous structure; ... Preparation and Characterization of ... - ACS Publications pubs.acs.org/doi/pdf/10.1021/acssuschemeng.5b01442 by K Xia - 2015 - Cited by 11 - Related articles Dec 9, 2015 - The LS−AN copolymer was characterized by. FTIR, 1H NMR, 13C NMR, ... KEYWORDS: Lignin, Carbon fiber, Copolymer, Blend, Wet spinning. Preparation and Characterization of Lignosulfonate–Acrylonitrile ... pubs.acs.org/doi/full/10.1021/acssuschemeng.5b01442 by K Xia - 2015 - Cited by 11 - Related articles Dec 9, 2015 - The LS–AN copolymer was characterized by FTIR, 1H NMR, 13C NMR, UV, ... Thus, wide interest for developing lignin-based carbon fibers has ... Characterization of electrospun lignin based carbon fibers adsabs.harvard.edu/abs/2015AIPC.1664o0003P by V Poursorkhabi - 2015 - Related articles Title: Characterization of electrospun lignin based carbon fibers. Authors: Poursorkhabi, Vida; Mohanty, Amar; Misra, Manjusri. Affiliation: AA(School of ...
