Carboxymethyl cellulose blends

K. El-Salmawi, M. Zaid, S. Ibraheim, A. El-Naggar, A. Zahran, Sorption of dye wastes by poly (vinyl alc(4iol)/poly (carboxymethyl cellulose) blend grafted through a radiation method, J. Appl. Polym. Sci. 82 (1) (2001) 136-142. 

The carboxymethyl cellulose (CMC) derivatives and carboxymethyl starch (CMS) are effective antiredeposition agents that are cellulose-containing fibers such as cotton and blends of cotton and synthetic fibers. However, CMC has virtually no effect on pure synthetic fibers. Other effective antiredeposition agents and soil repellents have been developed (Fig. 5.4) [20]. 

Vasile, C., Bumbu, G.G., Dumitriu, R.P., Staikos, G., (2004), Comparative study of the behavior of carboxymethyl cellulose-g-poly(N-isopropylaciylamide) copolymers and their equivalent physical blends. European polymer Journal, Vol. 40, No. 6, (June 2004) pp 1209-1215, ISSN 0014-3057. 

Preparation of Antibacterial 0-Carboxymethylated Chitosan/Cellulose Blend... 

Preparation of Antibacterial O-Carboxymethylated Chitosan/Cellulose Blend Film from LiCL/yV,N-DiMETHYLACETAMiDE Solution (Li et al. 2002)... 

Cellulosic membranes are developed as a novel dmg delivery system, which is expressed to use on the skin and used as a mucus membrane of stomach, ear, nose, eye, rectum, and vagina. The goal excipients of these preparations are adhesive and film-former polymers. Modified cellulose, especially cellulose ethers, are extensively applied in bio-adhesives such as nasal, vaginal, ocular, buccal, and transdermal inventions only or by blend with additional polymers. Further newly applied ethers of cellulose in bio-adhesives contain anionic ether derivatives such as sodium carboxy-methyl cellulose (NaCMC) and non-ionic cellulose ethers such as hydoxypropyl cellulose (HPC), carboxymethyl cellulose (CMC), hydroxyethyl cellulose, ethyl cellulose (EC), hydroxylpropylmethyl cellulose (HPMC), or methyl cellulose (MC). Capability of polymer to absorb water from mucus and pH of objective area are main features defining the adhesive power of polymers. One benefit of cellulose ethers, such as HPC and NaCMC, is smaller dependence of adhesion period and their adhesion strength to pH of medium than thiolated bio-adhesive polymers and polyacrylate... 

Studies on pectin films were done as early as 1936 (i). Generally these studies involved derivatized pectins and the use of polyvalent cations such as calcium. Much of the work was on coatings for foods. Schultz et al. (2, 3) prepared films from low methoxyl (<11%) pectin and found that tensile strength for these films decreased with increasing methoxyl level. The films all had similar tensile strengths on the order of 90 MPa with and without added calcium. More recently. Hind et al. (4) studied blends of pectin and (carboxymethyl) cellulose for use as cigarette papas. 

Also, literature reports new biodegradable poly(ethylene oxide)/cellulose, poly(ethylene oxide)/cellulose acetate, poly(ethylene oxide)/carboxymethyl cellulose, and poly(ethylene oxide)/cellulose ether blends obtained by solution casting and investigated by differential scanning calorimetry, temperature-modulated differential scanning calorimetry, and infrared spectroscopy techniques [134]. These studies indicate... 

Electrolyte gelling agents such as polyacrylic acid, potassium or sodium polyacrylate, sodium carboxymethyl cellulose or various gums are generally blended into the zinc powder to improve electrolyte accessibility during discharge. 

The molecular dynamics of polyvinyl alcohol (PVA) and carboxymethyl cellulose (CMC) blends was investigated as a function of composition, temperature and frequency using DRS [44]. PVA and CMC were found to be compatible over the range of composition studied. When the dielectric permittivity, loss tangent and a. c. conductivity of all samples were studied as functions of temperature and frequency, the results showed that the dielectric dispersion consisted of both dipolar and interfacial polarization. The frequency dependence of the a.c. conductivity indicated that correlated barrier hopping (CBH) was the most suitable mechanism for conduction. 

P. Patel, R. Ashwini, S. Shivakumar, B.K. Sridhar. Preparation and evaluation of extended release matrix tablets of diltiazem using blends of tamarind xyloglucan with gellan gum and sodium carboxymethyl cellulose. Pharm Lett. 3 (4) 380-392,2011. 

Han, B. et al.. Preparation and characterization of cellulose acetate/carboxymethyl cellulose acetate blend ultrafiltration membranes. Desalination, 2013.311 80-89. 

Boricha, A. G. and Murthy, Z. V. P. 2010. Preparation of N.O-carboxymethyl chitosan/cellulose acetate blend nanofiltration membrane and testing its performance in treating industrial wastewater. Chem. Eng. J. 157 393-400. 

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