Microrobotic platform for manipulation and flexibility measurement of individual paper fibers

2010 ◽  
Author(s):  
P Saketi ◽  
A Treimanis ◽  
P Fardim ◽  
P Ronkanen ◽  
P Kallio
Keyword(s):  
Flexibility Measurement ◽  
Individual Paper ◽  
Paper Fibers

scholarly journals Beneficial effect of gelatin on iron gall ink corrosion

2021 ◽  
Vol 9 (1) ◽  
Author(s):  
Alice Gimat ◽  
Anne Michelin ◽  
Pascale Massiani ◽  
Véronique Rouchon
Keyword(s):  
Beneficial Effect ◽  
Lower Amount ◽  
X Ray ◽  
Cellulosic Fibers ◽  
Scanning Transmission ◽  
Individual Paper ◽  
Paper Fibers ◽  
Iron Gall ◽  
The Impact ◽  
X Ray Absorption

AbstractIron gall Inks corrosion causes paper degradation (browning, embrittlement) and treatments were developed to tackle this issue. They often include resizing with gelatin to reinforce the paper and its cellulosic fibers (of diameter approx. 10 µm). This work aimed at measuring the distribution of ink components at the scale of individual paper fibers so as to give a better understanding of the impact of gelatin (re-)sizing on iron gall ink corrosion. For this purpose, scanning transmission X-ray microscopy (STXM) was used at the Canadian light source synchrotron (CLS, Saskatoon). This technique combines nano-scale mapping (resolution of 30 nm) and near edge X-ray absorption fine structure (NEXAFS) analysis. Fe L-edge measurements enabled to map iron distribution and to locate iron(II) and iron(III) rich areas. N K-edge measurement made it possible to map gelatin distribution. C K-edge measurements allowed mapping and discrimination of cellulose, gallic acid, iron gall ink precipitate and gelatin. Three fibers were studied: an inked fiber with no size, a sized fiber that was afterwards inked and an inked fiber sprayed with gelatin. Analysis of gelatin and ink ingredients distribution indicated a lower amount of iron inside the treated cellulosic fiber, which may explain the beneficial effect of gelatin on iron gall ink corrosion.

scholarly journals Gelatin, a protective agent against iron gall ink corrosion?

2021 ◽  
Author(s):  
Alice Gimat ◽  
Anne Michelin ◽  
Pascale Massiani ◽  
Véronique Rouchon
Keyword(s):  
Mapping Technique ◽  
Protective Agent ◽  
Main Constituent ◽  
Cellulosic Fibers ◽  
Individual Paper ◽  
Water Affinity ◽  
Paper Fibers ◽  
Iron Gall ◽  
The Impact ◽  
Soluble Components

Abstract Iron gall Inks are known to promote paper degradation, thus jeopardizing the conservation of written Heritage. This phenomenon, also called iron gall ink corrosion, is not only governed by chemical reactions occurring between ink constituents and cellulose (the main constituent of paper) but also by the penetration of ink components inside the paper. This penetration depends on the ability of water and ink soluble components to migrate inside the sheet. This latter is composed of hydrophilic cellulosic fibers (of diameter approx. 10 µm) embedded in a size that lowers water affinity and thus makes it suitable for writing. This work aims to better understand the impact of gelatin size on iron gall ink corrosion by investigating the distribution of gelatin and ink components at the scale of individual paper fibers. STXM, a nano-scale mapping technique (resolution of 30 nm) that also allows NEXAFS analysis was used for this purpose. Fe L-edge measurements enabled to map iron distribution and to locate iron(II) and iron(III) rich areas. N K-edge measurement made it possible to map gelatin distribution. C K-edge measurements allowed mapping and discrimination of cellulose, gallic acid, iron gall ink precipitate and gelatin. Three fibers were studied: an inked fiber with no size, a sized fiber that was afterwards inked and an inked fiber sprayed with gelatin (to model the impact of conservation treatments that use gelatin as a re-sizing agent). Analysis of gelatin and ink ingredients distribution inside and outside the cellulosic fiber gave some clues to account for the limiting impact of gelatin on iron gall ink corrosion.

The Grolier Codex: A Non Destructive Study of a Possible Maya Document using Imaging and Ion Beam Techniques

2007 ◽  
Vol 1047 ◽  
Author(s):  
Jose Luis Ruvalcaba ◽  
Sandra Zetina ◽  
Helena Calvo del Castillo ◽  
Elsa Arroyo ◽  
Eumelia Hernández ◽  
...  
Keyword(s):  
New York ◽  
Elemental Analysis ◽  
Rutherford Backscattering Spectrometry ◽  
Ion Beam ◽  
Unknown Origin ◽  
Blue Pigment ◽  
Early Colonial ◽  
Paper Fibers ◽  
Non Destructive ◽  
Preparation Layer

AbstractThe Grolier Codex has been a controversial document ever since its late discovery in 1965. Because of its rare iconographical content and its unknown origin, specialists are not keen to assure its authenticity that would set it amongst the other tree known Maya codes in the world (Dresden, Paris Codex and Madrid Codex).The document that has been kept in the Museo Nacional de Antropología in Mexico City, after its exposure in 1971 at the Grolier Club of New York, has been analyzed by a set of non-destructive techniques in order to characterize its materials including paper fibers, preparation layer and colors composition. The methodology included UV imaging, IR reflectography and optic microscopy examinations as well as Particle Induced X-ray Emission (PIXE) and Rutherford Backscattering Spectrometry (RBS) using an external beam setup for elemental analysis. All the measurements were carried out at 3MV Pelletron Accelerator of the Instituto de Física, UNAM. The aim of this work is to verify if the materials in the Grolier Codex match those found for other pre-Hispanic documents.From the elemental composition we concluded that the preparation layer shows the presence of gypsum (CaSO4), color red is due to red hematite (Fe2O3) and black is a carbon-based ink. These results agree with previous analyses carried out by Scanning Electron Microscopy (SEM-EDX) on few samples. However, the presence of Maya Blue in the blue pigment cannot be assured. The examination using UV and IR lights shows homogeneity in the inks and red color but dark areas that contain higher amounts of K in the preparation layer. This paper discusses the results obtained for the UV-IR examinations and the elemental analysis. A comparison with other studies on pre-Hispanic and early colonial codex is presented.

scholarly journals The Effect of Fe3O4 Nanoparticle Size on Electrical Properties of Nanofluid Impregnated Paper and Trapping Analysis

Molecules ◽  
2020 ◽  
Vol 25 (16) ◽  
pp. 3566
Author(s):  
Bin Du ◽  
Qian Liu ◽  
Yu Shi ◽  
Yushun Zhao
Keyword(s):  
Dielectric Loss ◽  
Fe3o4 Nanoparticles ◽  
Breakdown Strength ◽  
Environmental Scanning Electron Microscopy ◽  
Trap Depth ◽  
Nanoparticle Size ◽  
Environmental Scanning ◽  
Fe3o4 Nanoparticle ◽  
Paper Fibers ◽  
Insulation Performance

This paper systematically studies the effect of Fe3O4 nanoparticle size on the insulation performance of nanofluid impregnated paper. Three kinds of Fe3O4 nanoparticles with different sizes and their nanofluid impregnated papers were prepared. Environmental scanning electron microscopy (ESEM) and infrared spectroscopy were used to analyze the combination of Fe3O4 nanoparticles and nanofluid impregnated paper. The effect of nanoparticle size on breakdown voltage and several dielectric characteristics, e.g., permittivity, dielectric loss, of the nanofluid impregnated paper were comparatively investigated. Studies show that the Fe3O4 nanoparticles were bound to impregnated paper fibers by O–H bonds, while the relative permittivity and dielectric loss of the nanofluid impregnated papers were increased. Meanwhile, the increase of trap depth, caused by the nanoparticles, can trap the electric charge and improve the breakdown strength. The test results show that the direct current (DC) and alternating current (AC) breakdown voltages of nanofluid impregnated paper increased by 9.1% and 10.0% compared to FR3 nanofluid impregnated paper, respectively.

scholarly journals Efficient Hydrophobic Modification of Old Newspaper and Its Application in Paper Fiber Reinforced Composites

Polymers ◽  
2019 ◽  
Vol 11 (5) ◽  
pp. 842 ◽  
Author(s):  
Weiwei Zhang ◽  
Jin Gu ◽  
Dengyun Tu ◽  
Litao Guan ◽  
Chuanshuang Hu
Keyword(s):  
Mechanical Properties ◽  
Aspect Ratio ◽  
Natural Fiber ◽  
Fiber Reinforced Composites ◽  
Reinforced Composites ◽  
Fiber Reinforced ◽  
Oh Groups ◽  
Uniform Dispersion ◽  
The Matrix ◽  
Paper Fibers

Paper fibers have gained broad attention in natural fiber reinforced composites in recent years. The specific problem in preparing paper fiber reinforced composites is that paper fibers easily become flocculent after pulverization, which increases difficulties during melt-compounding with polymer matrix and results in non-uniform dispersion of paper fibers in the matrix. In this study, old newspaper (ONP) was treated with a low dosage of gaseous methyltrichlorosilane (MTCS) to solve the flocculation. The modified ONP fibers were characterized by Scanning Electron Microscope (SEM), Fourier Transform Infrared Spectroscopy (FTIR), and Thermogravimetric Analysis (TG). Then the modified ONP fibers and high-density polyethylene (HDPE) were extruded and pelletized to prepare ONP/HDPE composites via injection molding. Maleic anhydride-grafted polyethylene (MAPE) was added to enhance the interfacial bonding performance with the ultimate purpose of improving the mechanical strength of the composites. The mechanical properties such as tensile, flexural, and impact strength and the water absorption properties of the composite were tested. The results showed that the formation of hydrogen bonding between ONP fibers was effectively prevented after MTCS treatment due to the reduction of exposed –OH groups at the fiber surface. Excessive dosage of MTCS led to severe fiber degradation and dramatically reduced the aspect ratio of ONP fibers. Composites prepared with ONP fibers modified with 4% (v/w) MTCS showed the best mechanical properties due to reduced polarity between the fibers and the matrix, and the relatively long aspect ratio of treated ONP fibers. The composite with or without MAPE showed satisfactory water resistance properties. MTCS was proven to be a cheap and efficient way to pretreat old newspaper for preparing paper fiber reinforced composites.

Observation of a Commercial Fluorinated Material, the Polyfluoroalkyl Phosphoric Acid Diesters, in Human Sera, Wastewater Treatment Plant Sludge, and Paper Fibers

2009 ◽  
Vol 43 (12) ◽  
pp. 4589-4594 ◽  
Author(s):  
Jessica C. D’eon ◽  
Patrick W. Crozier ◽  
Vasile I. Furdui ◽  
Eric J. Reiner ◽  
E. Laurence Libelo ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Phosphoric Acid ◽  
Wastewater Treatment Plant ◽  
Treatment Plant ◽  
Human Sera ◽  
Paper Fibers

scholarly journals Photocatalytic Degradation of Polynitrophenols on Various Commercial Suspended or Deposited Titania Catalysts Using Artificial and Solar Light

2008 ◽  
Vol 2008 ◽  
pp. 1-9 ◽  
Author(s):  
Hinda Lachheb ◽  
Ammar Houas ◽  
Jean-Marie Herrmann
Keyword(s):  
Chemical Oxygen Demand ◽  
Photocatalytic Degradation ◽  
Surface Area ◽  
Degradation Rate ◽  
Oxygen Demand ◽  
Solar Light ◽  
Test Reactions ◽  
Anionic Species ◽  
Paper Fibers ◽  
Purification Of Water

Phenol (PH) and three polynitrophenols (4-nitrophenol (PNP), 2,4-dinitrophenol (DNP), 2,4,6-trinitrophenol (TNP)) were photocatalytically degraded by using titania under either artificial or solar light. These four reactions were chosen as test reactions to compare the efficiencies of two suspended commercial titania photocatalysts (Degussa P-25 and Millennium PC-500). It appears that P-25 has a higher initial efficiency in all nitrophenol disappearance reactions. However, for the overall degradation rate, measured by the chemical oxygen demand (COD) disappearance, the performance of PC-500 was similar to that of P25. This was attributed to a favorable textural effect since PC-500 has a much higher surface area which facilitates the readsorption of intermediates. PC-500 was subsequently supported on a special photoinert paper provided by Ahlstrom Company (38-Pont Evèque, France). The influence of the silica binder used for sticking titania particles on the paper fibers was put in evidence as an inhibitor of the coulombic adsorption of anionic species, especially 2,4,6-trinitrophenol, because of the low pzc of silica. Once validated, this supported photocatalyst was introduced in an autonomous solar pilot photoreactor identical to the several prototypes built in the European AQUACAT program. It was demonstrated that the purification of water could be efficiently obtained in a larger scale without any final tedious filtration.

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