scholarly journals Preparation and Characterization of Nanoporous Sodium Carboxymethyl Cellulose Hydrogel Beads

2018 ◽  
Vol 2018 ◽  
pp. 1-12 ◽  
Author(s):  
Gulen Oytun Akalin ◽  
Mehlika Pulat
Keyword(s):  
Carboxymethyl Cellulose ◽  
Sem Analysis ◽  
Sodium Carboxymethyl Cellulose ◽  
Nanoporous Structure ◽  
Root Mean Square Roughness ◽  
Gel Content ◽  
Hydrogel Beads ◽  
Force Microscopy ◽  
Cellulose Hydrogel ◽  
Degradation Test

A series of nanoporous sodium carboxymethyl cellulose (NaCMC) hydrogel beads were prepared using FeCl3 ionic crosslinker by changing polymer and crosslinker percentages (%). Characteristics of the hydrogels were investigated by gel content, swelling test, degradation test, Attenuated Total Reflectance-Fourier Transform Infrared (ATR-FTIR), Scanning Electron Microscope/Energy Dispersive X-ray Analysis (SEM/EDX), and Atomic Force Microscopy (AFM). Swelling experiments were studied by changing time, temperature, and pH. The swelling percentage (S%) regularly decreased with increasing the amounts of polymer and crosslinker, in contrast with gel content results. NaCMC hydrogels were found to be sensitive to pH variations. The degradation test showed that hydrogels had good stability and their degradation period varied from 30 to 36 days. According to SEM analysis, NaCMC hydrogels had mostly nanoporous structure. The average granule and pore sizes of the least swollen NaCMC-12 hydrogel were found to be 13.1±0.3 nm and 82.1±3.2 nm. The elemental compositions of hydrogels were determined with EDX. The minimum average surface roughness (Ra) and root mean square roughness (Rms) parameters were found to be 15.7±1.9 nm and 20.3±2.2 nm for NaCMC-12 hydrogels by AFM. Due to their good morphologies, stabilities, and swelling behaviors, NaCMC hydrogels can be suitable for biomaterial applications.

scholarly journals Nanoporous Sodium Carboxymethyl Cellulose-g-poly (Sodium Acrylate)/FeCl3 Hydrogel Beads: Synthesis and Characterization

Gels ◽  
2020 ◽  
Vol 6 (4) ◽  
pp. 49
Author(s):  
Bijender Kumar ◽  
Ruchir Priyadarshi ◽  
Sauraj ◽  
Farha Deeba ◽  
Anurag Kulshreshtha ◽  
...  
Keyword(s):  
Carboxymethyl Cellulose ◽  
Sodium Carboxymethyl Cellulose ◽  
Sodium Acrylate ◽  
X Ray Diffraction ◽  
Hybrid Hydrogel ◽  
X Ray ◽  
Hydrogel Beads ◽  
Force Microscopy ◽  
Atomic Force ◽  
Potential Applications

Novel sodium carboxymethyl cellulose-g-poly (sodium acrylate)/Ferric chloride (CMC-g-PNaA/FeCl3) nanoporous hydrogel beads were prepared based on the ionic cross-linking between CMC-g-PNaA and FeCl3. The structure of CMC and CMC-g-PNaA were elucidated by Fourier transform infrared spectroscopy (FTIR) and nuclear magnetic resonance (NMR) spectroscopy, and the elemental composition was analyzed by energy dispersive X-ray analysis (EDX). The physicochemical properties of the CMC-g-PNaA/FeCl3 hydrogel beads were analyzed by X-ray diffraction (XRD), scanning electron microscopy (SEM), atomic force microscopy (AFM) and thermogravimetric analysis (TGA). The swelling percentage of hydrogel beads was studied at different time periods. The obtained CMC-g-PNaA/FeCl3 hydrogel beads exhibited a higher nanoporous morphology than those of CMC-g-PNaA and CMC beads. Furthermore, an AFM image of the CMC-g-PNaA/FeCl3 beads shows granule type topology. Compared to the CMC-g-PNaA (189 °C), CMC-g-PNaA/FeCl3 hydrogel beads exhibited improvement in thermal stability (199 °C). Furthermore, CMC-g-PNaA/FeCl3 hydrogel beads depicted a higher swelling percentage capacity of around 1452%, as compared to CMC-g-PNaA (1096%). Moreover, this strategy with preliminary results could be useful for the development of polysaccharide-based hybrid hydrogel beads for various potential applications.

Graphene oxide‐carboxymethyl cellulose hydrogel beads for uptake and release study of doxorubicin

2021 ◽  
Author(s):  
Aning Ayucitra ◽  
Artik Elisa Angkawijaya ◽  
Yi‐Hsu Ju ◽  
Chintya Gunarto ◽  
Alchris Woo Go ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Carboxymethyl Cellulose ◽  
Hydrogel Beads ◽  
Cellulose Hydrogel ◽  
Release Study ◽  
Uptake And Release

scholarly journals Preparation and characterization of dopamine–sodium carboxymethyl cellulose hydrogel

2019 ◽  
Vol 1 (6) ◽  
Author(s):  
Yining Chen ◽  
Guolian Cui ◽  
Nianhua Dan ◽  
Yanping Huang ◽  
Zhongxiang Bai ◽  
...  
Keyword(s):  
Carboxymethyl Cellulose ◽  
Sodium Carboxymethyl Cellulose ◽  
Cellulose Hydrogel

AFM study of the dynamics of α-alumina surface faceting during high-temperature processing

1995 ◽  
Vol 53 ◽  
pp. 334-335 ◽  
Author(s):  
Michael W. Bench ◽  
Jason R. Heffelfinger ◽  
C. Barry Carter
Keyword(s):  
High Temperature ◽  
Thin Foil ◽  
Sem Analysis ◽  
Conductive Coatings ◽  
Force Microscopy ◽  
Minimal Sample ◽  
Atomic Force ◽  
Formation And Evolution ◽  
High Temperature Processing ◽  
Nominal Surface

To gain a better understanding of the surface faceting that occurs in α-alumina during high temperature processing, atomic force microscopy (AFM) studies have been performed to follow the formation and evolution of the facets. AFM was chosen because it allows for analysis of topographical details down to the atomic level with minimal sample preparation. This is in contrast to SEM analysis, which typically requires the application of conductive coatings that can alter the surface between subsequent heat treatments. Similar experiments have been performed in the TEM; however, due to thin foil and hole edge effects the results may not be representative of the behavior of bulk surfaces.The AFM studies were performed on a Digital Instruments Nanoscope III using microfabricated Si3N4 cantilevers. All images were recorded in air with a nominal applied force of 10-15 nN. The alumina samples were prepared from pre-polished single crystals with (0001), , and nominal surface orientations.

The Reactive Formation of Diblock Copolymer at a Polymer/Polymer Interface and its Effect on Interfacial Structure

2000 ◽  
Vol 629 ◽  
Author(s):  
Jonathan S. Schulze ◽  
Timothy P. Lodge ◽  
Christopher W. Macosko
Keyword(s):  
Molecular Weight ◽  
Interfacial Structure ◽  
Root Mean Square Roughness ◽  
Radius Of Gyration ◽  
Interfacial Region ◽  
Force Microscopy ◽  
Amino Terminal ◽  
Polymer Interface ◽  
Atomic Force ◽  
Time Required

ABSTRACTThe reaction of perdeuterated amino-terminal polystyrene (dPS-NH2) with anhydrideterminal poly(methyl methacrylate) (PMMA-anh) at a PS/PMMA interface has been observed with forward recoil spectrometry (FRES). Bilayer samples were constructed by placing thin films of PS containing ∼8.5 wt % dPS-NH2 on a PMMA-anh layer. Significant reaction was observed only after annealing the samples at 174°C for several hours, a time scale at least two orders of magnitude greater than the time required for the dPS-NH2 chains to diffuse through the bulk PS layer. The topography of the interfacial region as copolymer formed was measured using atomic force microscopy (AFM). Roughening of the PS/PMMA interface was observed to varying degrees in all annealed samples. Furthermore, the extent of this roughening was found to depend on the PS matrix molecular weight. Reaction in the samples with a high molecular weight PS matrix resulted in a root mean square roughness approximately equal to the radius of gyration Rg of the copolymer. However, approximately twice as much roughening was observed in the low molecular weight PS matrix. This study reveals how the molecular weight of one of the phases can affect the rate of reaction at a polymer/polymer interface.

Effects of Trehalose and Sodium Carboxymethyl Cellulose on Prevention of Organ Adhesion after Laparotomy: A Preliminary Study

2009 ◽  
Vol 40 (2) ◽  
pp. 19-26 ◽  
Author(s):  
Soojung LEE ◽  
Yasutsugu MIWA ◽  
Ryohei NISHIMURA ◽  
Ung-il CHUNG ◽  
Shigeki SUZUKI ◽  
...  
Keyword(s):  
Carboxymethyl Cellulose ◽  
Sodium Carboxymethyl Cellulose ◽  
Preliminary Study

Optimization of hydroxypropyl methylcellulose and sodium carboxymethyl cellulose in buccal film salbutamol sulphate

2020 ◽  
Vol 23 (03) ◽  
pp. 33-49
Author(s):  
Ni’matul Mauludiyah ◽  
Devi Ayu Aprillia ◽  
Viddy Agustian Rosyidi ◽  
Lusia Oktora Ruma Kumala Sari
Keyword(s):  
Carboxymethyl Cellulose ◽  
Hydroxypropyl Methylcellulose ◽  
Sodium Carboxymethyl Cellulose ◽  
Salbutamol Sulphate
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