Ion exchange membranes blended by cellulose cuoxam with alginate

Zhang, Lina; Zhou, Daochun; Wang, Hao; Cheng, Shanshan

doi:10.1016/s0376-7388(96)00227-x

Cited by 47 publications

(17 citation statements)

References 11 publications

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“…[10] By using a blend of cellulose and alginate to prepare new material, not only can the strength of alginate gel be ORDER REPRINTS increased, but also the biodegradability can be maintained. In our laboratory, cellulose/alginic acid ion-exchange membranes have been prepared by a coagulating mixture of a cellulose cuoxam and alginate aqueous solution [11] and a mixture of cellulose and alginate in 6 wt% NaOH/4 wt% urea aqueous solution. [12] The blend membranes of cellulose/alginic acid exhibited significantly good mechanical properties, owing to a strong electrostatic interaction caused by the occurring intermolecular hydrogen bonds between two polymers and the formation of a Ca 2þ bridge.…”

Section: Adsorption Of CDmentioning

confidence: 99%

Adsorption of Cd²⁺and Cu²⁺on Ion‐Exchange Beads from Cellulose/Alginic Acid Blend

Zhang

Cai

Zhou

et al. 2005

Separation Science and Technology

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Our previous work has proved that mechanical properties of a blending alginate with cellulose was significantly enhanced in a wet state and maintained its biodegradability. In this article, ion-exchange beads were prepared from cellulose and alginate in 6 wt% NaOH/4 wt% urea aqueous solution by using an emulsion phase separation method. The structure and morphology of the beads were characterized by scanning electron microscope (SEM) and Fourier transform infrared (FTIR) spectra, and the adsorption behaviors to Cd 2þ and Cu 2þ ions were measured by atomic absorption spectrometry (AAS). The effects of pH, adsorption time, ion concentration, temperature, and reusability of the beads on the adsorbed amount of Cd 2þ and Cu 2þ ions in aqueous solution were investigated by a batch method. The results indicated that the beads had a spherical shape, with 4 -20 mm of diameter and relatively high ORDER REPRINTS ion-exchange capacity (3.81 mmol g 21 ). The combined action of Cd 2þ and Cu 2þ ions on beads generally was found to be antagonistic. The selectivity of the beads for the adsorption of Cd 2þ ions was higher than that of Cu 2þ ions. The adsorbed amount was given to a maximum for Cd 2þ ions at pH 2.2, and for Cu 2þ ions at pH 3.2. The adsorbed amount of the beads reached the values of 0.7 and 0.5 mmol g 21 for Cd 2þ and Cu 2þ ions, respectively. The beads could be regenerated by using 1 mol L 21 HCl aqueous solution, up to 95% recovery, and the adsorptiondesorption cycles, performed over 10 times, maintained the adsorption capacity, indicating a good reusability.

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Section: Adsorption Of CDmentioning

confidence: 99%

Adsorption of Cd²⁺and Cu²⁺on Ion‐Exchange Beads from Cellulose/Alginic Acid Blend

Zhang

Cai

Zhou

et al. 2005

Separation Science and Technology

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“…The total membrane area produced for medical applications almost matches all industrial membrane applications together (Fortunati et al, 2012;Okuno et al, 1992;Zhang et al, 1997;Chanachi et al, 2000;Cao et al, 2000). In fact in true sense, the value of medical membrane products is far larger than all other applications combined (Soppimath et al, 2001;Gardner et al, 1983;Gregoriadis et al, 1977;Gregoriadis et al, 2007).…”

Section: Introductionmentioning

confidence: 86%

Interpenetrating Polymer Network Hydrogel Membranes of Karayagum and Sodium Alginate for Control Release of Flutamide Drug

Nagarjuna¹,

Babu²,

Maruthi³

et al. 2016

J App Pharm Sci

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Flutamide (FLT) is a potent non-steroidal antiandrogen drug primarily used in palliative treatment of prostate cancer that inhibits androgen uptake and / or nuclear binding of androgen in target tissue. The present study gives, the experimental results on the successful encapsulation of Flutamide drug using Sodium Alginate (SA)/ Karaya gum (KG)) blend hydrogel membranes as controlled release (CR) polymer matrices. The Flutamidecontaining polymer blend hydrogel membranes have been prepared by changing the experimental variables such as KG, SA and drug content by solution casting evaporation method. The membranes were characterized by swelling studies, FTIR, DSC, XRD, and SEM studies. The swelling results indicated that swelling of polymer membranes decrease with the increasing the amounts of Karaya gum. However, no significant variation in swelling was observed with different amounts of flutamide loading. The absence of chemical interactions between active ingredients and polymer was confirmed by FT-IR spectral measurements. Differential scanning calorimeter (DSC) and X-ray diffraction (XRD) studies were performed to understand the crystalline nature of drug after encapsulation into the Hydrogel membranes. Scanning electron microscopy (SEM) was used to study the surface morphology of the hydrogel membranes. The in vitro studies were carried out in phosphate buffer pH 7.4 at 37 o C. The results of controlled release tests showed that the amount of Flutamide release increased with the increasing the amount of SA in the membrane. Moreover, the release rate of drug increased as the amount of drug loaded in the membranes increased. All the results indicated that the prepared membrane was potentially useful in drug delivery systems and the prolonged release rate was observed. Key words:Interpenetrating Polymer Network, Flutamide, Encapsulation, Karaya Gum. INTRODUCTIONIn recent years, biodegradable polymers have attracted attention to be used as biomaterials particularly, for tissue engineering, gene therapy, wound healing and controlled drug delivery systems (Sahoo et al., 2009). The most important advantage of biodegradable polymers is the disappearance of implanted foreign materials from the body as a result of their biodegradation. In general polymers used in biomedical * Corresponding Author E-mail: chowdojirao @ gmail.com applications are poly (lactic acid), poly(glycolic acid) (PGA), poly(e-caprolactone) (PCL), poly(3-hydroxyl butyrate) (PHB), copolymers of polyglycolide, chitosan, alginate and natural gums such as Xanthan Gum, Guar gum (Sahoo et al., 2010; Edulund et al., 2002;Jain Rajeev et al., 2002;Kamath et al., 1993).Different types of drug delivery systems, like microcapsules, microspheres, implants, pallets and hydrogel membranes have been fabricated by using above bio-degradable polymers as drug matrix. Hydrogel membranes play a major role in medical applications, in particular in a number of life saving treatment methods. Membranes are used in drug delivery, artificial organs, tissue regeneration,...

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“…[16][17][18] For some samples an improvement of the mechanical properties by blending CE with another natural polymer such as casein 19,20 or alginate 21 is also reported. The blending of fibroin with other polymers is expected to be a useful method to improve its mechanical properties or to develop new functions.…”

Section: Introductionmentioning

confidence: 95%

Fibers based on cellulose–silk fibroin blend

Marsano

Canetti

Conio

et al. 2007

J of Applied Polymer Sci

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Fibers made of cellulose (CE) and silk fibroin (SF) are wet spun from solutions in N,N-dimethylacetamide containing 7% LiCl (w/w). Different coagulation baths (water and ethanol) and spinning conditions are used. By using water as the coagulant, a partial dissolution of SF occurs and negligible variation of the mechanical properties of the CE-SF fibers with respect to the CE fibers is found. Fibers coagulated in ethanol are dimensionally homogeneous and show better properties. A modulus of about 13 GPa and elongation to break of 16% for the blend containing 30% (w/w) SF are obtained with a 20-mm air gap. The fibers are characterized by FTIR micro-Raman, scanning electron microscopy, and wide-and small-angle X-ray analyses. In particular, the X-ray results show that CE-SF fibers are amorphous with a homogeneous dispersion of small SF domains (1.3 nm) in the CE matrix. These results confirm the good compatibility between the two natural polymers.

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Ion exchange membranes blended by cellulose cuoxam with alginate

Cited by 47 publications

References 11 publications

Adsorption of Cd²⁺and Cu²⁺on Ion‐Exchange Beads from Cellulose/Alginic Acid Blend

Adsorption of Cd²⁺and Cu²⁺on Ion‐Exchange Beads from Cellulose/Alginic Acid Blend

Interpenetrating Polymer Network Hydrogel Membranes of Karayagum and Sodium Alginate for Control Release of Flutamide Drug

Fibers based on cellulose–silk fibroin blend

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Ion exchange membranes blended by cellulose cuoxam with alginate

Cited by 47 publications

References 11 publications

Adsorption of Cd2+and Cu2+on Ion‐Exchange Beads from Cellulose/Alginic Acid Blend

Adsorption of Cd2+and Cu2+on Ion‐Exchange Beads from Cellulose/Alginic Acid Blend

Interpenetrating Polymer Network Hydrogel Membranes of Karayagum and Sodium Alginate for Control Release of Flutamide Drug

Fibers based on cellulose–silk fibroin blend

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Product

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Adsorption of Cd²⁺and Cu²⁺on Ion‐Exchange Beads from Cellulose/Alginic Acid Blend

Adsorption of Cd²⁺and Cu²⁺on Ion‐Exchange Beads from Cellulose/Alginic Acid Blend