01002nas a2200229   4500008004100000022001400041245006300055210006100118260009500179300001200274490000700286520022700293653001100520653001800531653001800549100002400567700002000591700002100611700002400632700002000656856009600676       2007                        eng d  a0021-979700aPolyethylene waxes: catalytic synthesis by ti-biphenolates0 aPolyethylene waxes catalytic synthesis by tibiphenolates  a525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USAbACADEMIC PRESS INC ELSEVIER SCIENCEcJUL  a977-9870 v443 a<p>{Soluble complexes of Ti (IV) bearing biphenol groups such as 1,1'-binaphthelene 2, 2' diol (Binol), 1, 1'-methylene di-2-naphthol, biphenol were prepared and characterized. These catalyst precursors formulated as [</p>10afibers10aNanoparticles10aSelf-assembly1 aUmare, Prashant, S.1 aRao, Karumanchi1 aTembe, Gopal, L.1 aDhoble, Deepa, Arun1 aTrivedi, Bhavna  uhttps://library.ncl.res.in/content/polyethylene-waxes-catalytic-synthesis-ti-biphenolates-001893nas a2200205   4500008004100000022001400041245015300055210006900208260006700277300001400344490000800358520106800366653001501434653002001449653001101469100002801480700002501508700002201533856013201555       2013                        eng d  a0021-899500aMorphology, polymorphism, and metal ion adsorption studies of electrospun nanofibers based on pvdf and organically modified layered double hydroxide0 aMorphology polymorphism and metal ion adsorption studies of elec  a111 RIVER ST, HOBOKEN 07030-5774, NJ USAbWILEY-BLACKWELLcDEC  a4508-45150 v1303 a<p>Nonwoven nanofiber mats of polyvinylidene fluoride (PVDF) with modified layered double hydroxide (MLDH) were prepared by electrospinning. The fiber morphology was studied using scanning electron microscopy. X-ray diffraction and FTIR spectroscopy was used to characterize the polymorphism in electrospun mats. Fibers of diameter in the range 80-800 nm with beads of about 2-3 mu m size were observed for pure PVDF, while in case of PVDF/MLDH nanocomposites the number and size of beads were found to be significantly reduced. Uniform and fine nanofibers were obtained at lower content of MLDH, but slightly rough surface was seen for higher content. FTIR and X-ray diffraction patterns signify various crystalline forms of electrospun PVDF. The content of polar -crystalline phase of PVDF, which exhibit piezo and ferroelectric properties was found to be enhanced significantly due to reinforcement of MLDH. Use of these nanofiber mats for heavy metal Cu (II) removal was explored. (c) 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 130: 4508-4515, 2013</p>10aAdsorption10aelectrospinning10afibers1 aBirajdar, Mallinath, S.1 aWanjale, Santosh, D.1 aLonkar, Sunil, P.  uhttps://library.ncl.res.in/content/morphology-polymorphism-and-metal-ion-adsorption-studies-electrospun-nanofibers-based-pvdf-002142nas a2200361   4500008004100000022001400041245012100055210006900176260000800245490000600253520101400259653001001273653001801283653001101301653001101312653002101323653002701344653002101371653001201392653001501404653004101419653002301460653001301483100001601496700001801512700002201530700001901552700001901571700002201590700001901612700001901631856013001650       2017                        eng d  a2213-343700aRecovery of radio-cesium from actual high level liquid waste using solvents containing calix[4]arene-crown-6 ligands0 aRecovery of radiocesium from actual high level liquid waste usin  cAUG0 v53 a<p>This paper gives two methods, viz. a solvent extraction method and a hollow fiber contactor based liquid membrane method, for the separation of radio-cesium from actual high level liquid waste (HLLW) solutions using calix[4]arene-crown-6 based solvent systems. While the solvent extraction method involved calix[4]arene-bis-benzo-crwon-6 (CBC) in PTMS (phenyltrifluoromethyl sulphone), the hollow fiber supported liquid membrane method used a polysulphone fiber containing contactor and bis-octyl-benzo-calix[4]arene-mono-crown-6 (CMC) in 40% iso-decanol + 60% n-dodecane. Both methods reported selective radio-cesium separation with almost no contamination from the associated fission product radionuclides. The radiolytic stability of the hollow fiber contactor was checked by keeping the contactor module in contact with the diluted HLLW for 50 days. The second run carried out after 50 days resulted in excellent reproducibility suggesting efficacy of this method for radioactive waste remediation.</p>10a137Cs10aCalix-crown-610aCesium10afibers10aFission products10aHollow fiber contactor10aLiquid membranes10aliquids10aPUREX-HLLW10aRadioactive wastesSolvent extraction10asolvent extraction10aSolvents1 aJagasia, P.1 aDhami, P., S.1 aMohapatra, P., K.1 aAnsari, S., A.1 aJadhav, S., Y.1 aKalyankar, G., K.1 aGandhi, P., M.1 aKharul, U., K.  uhttps://library.ncl.res.in/content/recovery-radio-cesium-actual-high-level-liquid-waste-using-solvents-containing-calix4arene03020nas a2200289   4500008004100000022001400041245013500055210006900190260000900259300001400268490000600282520205800288653001702346653002502363653001102388653001202399653002302411653002602434653000902460100001902469700002402488700002002512700002302532700002002555700002702575856012802602       2021                        eng d  a2637-610500aProcess-induced microstructure in viscose and lyocell regenerated cellulose fibers revealed by SAXS and SEM of acid-etched samples0 aProcessinduced microstructure in viscose and lyocell regenerated  cMAY   a2598-26070 v33 a<p>Regenerated cellulose fibers represent an important class of bioderived commercial fibers. The traditional viscose process requires the use of environmentally harmful carbon disulfide solvent to produce fibers. Lyocell fibers, produced using a more sustainable recent process, exhibit differences in properties from viscose. These differences arise from their semicrystalline microstructure, formed during fiber spinning. It is widely believed that regenerated cellulose fibers predominantly form fringed fibrillar crystals. We optimize acid etching, followed by SEM as an experimental tool to visualize this fibrillar structure. Acid etching provides sufficient topological contrast to directly visualize similar to O(10 nm) fibrils using field-emission scanning electron microscopy (SEM). We combine SEM with small-angle X-ray scattering (SAXS) to reveal other microstructural details. We observe a Bragg peak, indicating the coexistence of stacked lamellar structure with crystalline fibrils for viscose fibers, but not for lyocell. Viscose and lyocell fibers are characterized by partially oriented semicrystalline microstructure. We present a methodology to calculate the Lorentz correction for such microstructure and employ this to analyze the lamellar scattering from viscose fibers using a 1D correlation function approach. We characterize the lamellar microstructure after swelling viscose fibers with water and observe expansion of the Bragg spacing due to water absorption in the amorphous regions. Our data suggest that the water-induced plasticization of amorphous regions is inhomogeneous. Lamellar stacks that are more misoriented from the fiber direction exhibit lower swelling than those along the fiber direction. The experimental methods described in this work reveal interesting details of semicrystalline microstructure in regenerated cellulose fibers, with important implications for the mechanical response of dry and wet fibers. The methods developed here might find use in investigations of other polymer fibers as well.</p>10aacid etching10acrystalline lamellae10afibers10afibrils10aLorentz correction10aRegenerated cellulose10aSAXS1 aSharma, Aakash1 aWankhede, Parnashri1 aSamant, Roopali1 aNagarkar, Shailesh1 aThakre, Shirish1 aKumaraswamy, Guruswamy  uhttps://library.ncl.res.in/content/process-induced-microstructure-viscose-and-lyocell-regenerated-cellulose-fibers-revealed