introduction surface modification of polymeric materials

... required for surface modifications, are addressed Further, these surface treatments are compared with a conventional method.Mechanism of Surface ModificationThe mechanism of plasma surface modification ... aerospace structure materials.Plasma Hybrid Surface Treatment of Fiber-Reinforced Composite Materials 3.4.9.1 Adhesion of Fiber-Reinforced Composite Materials The surface modification and/or ... film, is put on the surface of the reactor, the surface of the material is in contact with the surface of the plasma reactor and it is treated by the plasma induced near the edge of the discharge

Ngày tải lên: 06/03/2024, 09:41

... 299, 611, 612, 719–723, 720–722 of fractions 615– 618, 616– 618 of lamellae 155, 612, 614 of the fold surface 623, 623 peak, dependence on Tc 613 range of 614 superheating 611, 612, 612 ... part of the melting of C50H102 is clearly reversible The standard DSC shows the expected broadening in the melting peak due to the lag of the instrument The extrapolated onset of the... ... main part of the melting of C 50 H 102 is clearly reversible. The standard DSC shows the expected broadening in the melting peak due to the lag of the instrument. The extrapolated onset of the melting

Ngày tải lên: 11/08/2014, 06:20

... variety of single-phase and hybrid non-oxide ceramic fibers Trang 8TABLE OF CONTENTS LIST OF FIGURES xi LIST OF TABLES xv PREFACE xvi ACKNOWLEDGEMENTS xvii 1.1 Polymeric materials 1 1.1.1 History of ... 3The thesis of Daniel Thomas Welna was reviewed and approved* by the following: Professor of Polymer Science Associate Head for Graduate Studies Ayusman Sen Professor of Chemistry Head of the Department ... spinning of a polymeric ceramic precursor to produce a nanofiberous mat, which upon pyrolysis yield boron carbide nanofibers Chapter 2 describes the synthesis and characterization of novel single

Ngày tải lên: 13/11/2014, 11:13

... separation of magnetic materials and separation of non magnetic materials In the first method, magnetic separation of the target molecule could be achieved without further modification of magnetic materials ... functional materials (Caruso 2001) Surface modification of nanoparticles could be carried out by following methods: a Surface modification with inorganic molecules (Xu et al 1997) Trang 40b Surface modification ... of MNPs endows the particles with important properties Modification of the surface of MNPs prevents agglomeration of the particles and thus stabilizes the colloidal system Functionalization of

Ngày tải lên: 08/09/2015, 19:41

... Trang 1MODIFICATION OF POLYMERIC MEMBRANES FOR ENERGY SUSTAINABILITY AND CHUA MEI LING NATIONAL UNIVERSITY OF SINGAPORE 2014 Trang 2MODIFICATION OF POLYMERIC MEMBRANES FOR ... study and research Trang 5TABLE OF CONTENTS Page ACKNOWLEDGEMENTS……… i TABLE OF CONTENTS……… ii SUMMARY……….vi LIST OF TABLES……….viii LIST OF FIGURES……….ix CHAPTER ONE: INTRODUCTION 1.1 Gas separation ... 7CHAPTER FIVE: MODIFICATION OF POLYIMIDE VIA ANNEALING IN AIR AND INCORPORATION OF Β-CD AND Β-CD–FERROCENE 5.1 Introduction……… 79 5.2 Results and discussion……… 83 5.2.1 Characterizations of the membranes

Ngày tải lên: 09/09/2015, 11:22

... onto the biomaterials to induce bio-recognition mechanisms of the interaction of cells and polymeric biomaterial scaffolds These modifications can preserve the mechanical integrity of polymeric ... grained materials micro-It has been proved that the contact of cells to the surface of the biomaterials results in changes to the cell shape and bioactivity depending on the topography of the surface ... culture–treated polystyrene surfaces (TCP) Thus, surface modification Trang 34using nanofibers of various materials was proved to alter the attachment, proliferation, and differentiation of osteoprogenitor

Ngày tải lên: 02/10/2015, 12:55

... STUDY ON SURFACE MODIFICATION OF ANTIMONY DOPED TIN DIOXIDE NANOPARTICLES MONG YU SIANG NATIONAL UNIVERSITY OF SINGAPORE 2013 Trang 2FIRST PRINCIPLES STUDY ON SURFACE MODIFICATION OF ANTIMONY ... distances Such a method would involve the surface functionalization of nanoparticles 1.2: Introduction to surface modification Surface functionalization of semiconductor nanoparticles is an increasingly ... conductivity The electronegativity of fluorine may also withdraw electrons from critical surface active sites and increase the difficulty of surface modifications 1.3: Surface Modification and crosslinking

Ngày tải lên: 06/10/2015, 21:06

... temperature [39] 2.2.4 Surface modification of magnetic particles In the absence of any surface modification, magnetic nano-sized particles exhibit hydrophobic surfaces with a large surface area to ... the magnetic properties of the particles [39] Coating also can increase surface area to volume ratio of nano-sized magnetic particles Therefore, surface modification of magnetic nanoparticles ... separation of non-magnetic materials 9 Figure 2-2 Superparamagnetic particles under the absence of an external Figure 2-6 The formation of CD inclusion complex 25 Figure 2-7 Molecular structures of RhB,

Ngày tải lên: 12/10/2015, 17:36

... presents the results of nanofibrous surface modification of PCL membrane in terms of surface characterization and cell behavior studies The results showed that uniform nanofibrous topology were ... knowledge of biomaterials, the author would like to present recent data published for the surface modification of PCL, only to clarify the traditional ways to modify the inert surface of PCL It ... focus of electrospinning technology which produces nano-sized nanofibers to mimic the topology of the extracelluar matrix In the Chapter 3, materials and methods in nanofibrous surface modification

Ngày tải lên: 26/11/2015, 22:40

... desirable Surface properties are especially of concern because the interaction of any metal electrode with its environment mainly occurs at the surface, and also because of the dependence of the ... an inclined angle of 30o on the surface of the patterned wafer The typical evaporation rate is 1 Å s−1 for both Cr and Pt As the result of inclined deposition, a small part of the Pt/Cr is deposited ... Effect of pH on enzyme electrode The influence of pH buffer solution on glucose detection has been studied by several authors [7–10] Investigation of the effect of pH value on the performance of

Ngày tải lên: 13/01/2020, 07:28

... for the Degree of Doctor of Philosophy Surface Modification of Meta–aramid Trang 2VU, NGUYEN KHANH Surface Modification of Meta–aramid to Enhance Dyeing (Under the direction of Dr Stephen Michielsen) ... spinning (ii) PPDT 1976 Introduction of SVM fiber (formerly Polyhetero arylene 1978 Development of Arenka aramid fiber 1987 Introduction of HMO–50 (Technora) 1996 Introduction of Trevar (discontinued ... membrane surface modification with macromolecules Shown are strategies that lead to covalently bound polymer modifiers [94] .40 Figure 22 Modification of silica surface by “grafting–to” of poly(acrylic

Ngày tải lên: 11/07/2021, 16:56

... spectrogram of right side of laminated film IR spectrum of left side of laminated film IR spectrum of right side of laminated film DSC thermogram of laminated film Scheme for preparation of liquid plastic ... for analysis of polymers, biomaterials, adhesives, and insulators 2.6.3 Applications Analysis of polymeric materials is a good application of SIMS, where metallic elements are not often observed ... preparation of solid plastic specimen Scheme for deformulation of solid plastic specimen SEM micrograph of laminated plastic film EDXRA spectrogram of left side of laminated film EDXRA spectrogram of...

Ngày tải lên: 02/04/2014, 16:27

... may be less confusing A series of six additional examples of such improvement of the understanding is given on pg VII The study of “Thermal Analysis of Polymeric Materials is designed to accomplish ... theoretical basis of the experimental results of “Thermal Analysis of Polymeric Materials. ” The book contains, as shown above, a critically selected, limited series of topics The field of flexible ... polydispersity of 1.0 signals that all molecules are of the same length A mixture of equal masses of molecules of molar masses of 10,000 and 1,000,000 Da gives a polydispersity of 25.5 (M n =...

Ngày tải lên: 27/06/2014, 15:20

... materials of optimum properties and leads to the understanding of the behavior of already known polymeric materials, the elusive goal of every modern material scientist 1.3 Chain Statistics of Macromolecules ... concludes the discussion of Atoms, Small, and Large Molecules The major topics of this first chapter of the book were the identification of all types of molecules, the naming of macromolecules, and ... of Chemistry,” he wrote there: “In the present state of our knowledge we are not able to determine whether light be a modification of caloric, or caloric be, on the contrary, a modification of...

Ngày tải lên: 11/08/2014, 05:23

... possible to interpret the behavior of polymeric materials as is described in more detail on-hand of a larger series of examples in Chaps and The understanding of polymeric materials at this level has ... in the lower part of Fig 2.80 illustrates this statement Equation (1) in Fig 2.81 expresses the time dependence of the total rate of change of entropy of the system in terms of the flux and production ... asymmetric counterpart of the wagging motion, i.e., one hydrogen atom comes out of the plane of the paper while the other goes back behind the plane of the paper The stretching of the C C bond (#9)...

Ngày tải lên: 11/08/2014, 06:20

... recognition of mesophases and mesophase glasses as states of intermediate order and their study by thermal analysis has become of great importance for the understanding of the multitude of materials ... discovery of colloids Today, such small phases are better called microphases [27] In microphases, the effect of the surfaces cannot be neglected Surface free energies and charges (surface potentials) ... description of states is achieved through their major functions and variables of state listed in Fig 2.116 One can deduce from the microscopic picture of the states of matter that the enthalpy of the...

Ngày tải lên: 11/08/2014, 06:20

... poly(oxymethylene) on a single-crystal surface of NaCl Clearly the crystal order of the NaCl surface affects the alignment of the subsequently grown polymer crystals This transmittal of order is called epitaxy ... top of the fold surfaces of polymer lamellae This surface would otherwise be inactive for further growth and restrict polymer crystals to single lamellae (see Chap 5) An example of a series of ... Dynamics of Chemical and Phase Changes _ to note that the lines of intersection of neighboring crystals are straight This is a consequence of nucleation of all...

Ngày tải lên: 11/08/2014, 06:20

... shown at the bottom of the figure for the case that L is the same in all directions of space The volume of the cube as a function of temperature can then be expressed in terms of the linear and ... the concept of latent heat He noticed that when ice melts, it takes up heat without change of temperature He held a position as Professor of Chemistry and Anatomy at the University of Glasgow, ... the calorimeter or breaking an ampule of one of the reactants to initiate the process More advanced versions of this type of calorimeter involve compensation of heat flow, as shown in Sect 4.2.5...

Ngày tải lên: 11/08/2014, 06:20

... illustrates the evaluation of the constant - as the slope of a plot of the square of the reciprocal of the uncorrected specific heat capacity as a function of the square of the frequency as suggested ... material analyzed become mobile at Tg The DSC of the glass transition is thus a major source for characterization of materials Quantitative Analysis of the Heat of Fusion The melting transition with ... description of the time-dependent Ts as the sum of the two components The sketch of the unit circle links the maximum amplitudes of the two components Furthermore, the standard addition theorem of trigonometric...

Ngày tải lên: 11/08/2014, 06:20