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Characterization of Novel Lignocellulosic spinifex littoreus Fibers and Their Composites

Journal of Bionic Engineering 2020年第2期17卷 393-404页

作者： Milan Soosai Christopher Thankian Winowlin Jappes Jebas Thangiah Rajini Nagarajan Mayandi Kalimuthu Sikiru Oluwarotimi Ismail Faruq Mohammad Department of Mechanical Engineering Cape Institute of TechnologyLevengipuramTirunelveli 627114Tamil NaduIndia Department of Mechatronics Engineering Kamaraj College of Engineering&Technology VellakulamMadurai dist-622701Tamil NaduIndia Centre for Composite Materials Department of Mechanical EngineeringKalasalingam UniversityKrishnankoilVirudhunagar 626126Tamil NaduIndia Centre for Engineering Research Department of EngineeringSchool of Engineering and Computer ScienceUniversity of HertfordshireHatfieldHertfordshire AL109ABUK Surfactants Research Chair Department of ChemistryCollege of ScienceKing Saud UniversityRiyadh 11451Kingdom of Saudi Arabia

This innovative work presents mechanical,physical and chemical characterization and analysis of newly extracted fiber from naturally resourced plant stem,named spinifex littoreus fibers(SLF).This is a novel natural,biodegradable and sustainable reinforcement for an improved ***,the chemical constituents of SLF,such as cellulose,lignin,moisture and wax content were *** raw SLF surfaces were modified by chemical treatment with sodium hydroxide(NaOH),calcium hydroxide(Ca(OH)2)and silane.A polyester matrix was reinforced with all the treated SLF,before the mechanical properties(tensile strengths)of the composites were *** all the surface chemically treated SLF/polyester composite samples,the Ca(OH)2 treated sample exhibited the highest tensile *** microscopic examination was carried out to validate this ***,this analysis established the mechanism of failure of the tensile fractured composite samples,using Scanning Electron Microscope(SEM),among other techniques.

关键词： cellulosic fiber spinifex littoreus fibers XRD FTIR SEM tensile strength

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ON THE OCCURRENCE OF spinifex TEXTURE IN PRO-TEROZOIC KOMATIITES AT YIYANG. HUNAN

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Chinese Science Bulletin 1988年第16期33卷 1375-1378页

作者：肖禧砥 Central South University of Technology Changsha

At Shizuitang-Taohulun, south suburb of Yiyang City, Hunan Province, a set of metamorphic basic volcanic rocks, with more than 2000-m thickness and 20 km^2 in surficial area, occurs in lower part of Lengjiaxi Group of... 详细信息

关键词： komatiite olivine spinifex texture middle-spaced skeleton crystal pseudomorph

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Structural characterization of carboxyl cellulose nanofibers extracted from underutilized sources

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Science China(Technological Sciences) 2019年第6期62卷 971-981页

作者： ZHAN ChengBo SHARMA Priyanka R. GENG LiHong SHARMA Sunil K. WANG RuiFu JOSHI Ritika HSIAO Benjamin S. Department of Chemistry Stony Brook University Stony Brook NY 11794-3400 USA National Engineer Research Center of Novel Equipment for Polymer Processing Key Laboratory of Polymer Processing Engineering of Ministry of Education South China University of Technology Guangzhou 510640 China

Two different chemical methods, TEMPO-oxidation and nitro-oxidation, were used to extract carboxyl cellulose nanofibers(CNFs) from non-wood biomass sources(i.e., jute, soft and hard spinifex grasses). The combined TEMPO-oxidation and homogenization approach was very efficient to produce CNFs from the cellulose component of biomass;however, the nitrooxidation method was also found to be effective to extract CNFs directly from raw biomass even without mechanical *** effect of these two methods on the resulting cross-section dimensions of CNFs was investigated by solution small-angle Xray scattering(SAXS), transmission electron microscopy(TEM) and atomic force microscopy(AFM). The UV-Vis spectroscopic data from 0.1 wt% TEMPO-oxidized nanofiber(TOCNF) and nitro-oxidized nanofiber(NOCNF) suspensions showed that TOCNF had the highest transparency(> 95%) because of better dispersion, resulted from the highest carboxylate content(1.2 mmol/g). The consistent scattering and microscopic results indicated that TOCNFs from jute and spinifex grasses possessed rectangular cross-sections, while NOCNFs exhibited near square cross-sections. This study revealed that different oxidation methods can result in different degrees of biomass exfoliation and different CNF morphology.

关键词： cellulose nanofibers TEMPO-oxidation nitro-oxidation SAXS microscopy jute spinifex

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