Rapid homogeneous preparation of cellulose graft copolymer in BMIMCL under microwave irradiation

Abstract

Acrylic acid(AA) was grafted onto cellulose in homogeneous media by using ammonium persulfate as an initiator in the presence of N,N 0 -methylenebisacrylamide as a crosslinker under microwave (MW) irradiation. The powerful and highly efficient direct solvent, 1-butyl-3-methylinidazolium chloride ionic liquid was used as the solvent for the dissolution of cellulose and the media for the homogeneous graft polymerization of AA onto cellulose. The use of MW resulted in a drastic reduction of reaction time: 3 min irradiation was sufficient, compared with 30 min to 5 h, as conventional heating was used. Investigation was conducted on the effect of reaction parameters, such as monomer concentration, crosslinker dosage, exposure temperature and exposure time. The structure of the graft copolymer was confirmed by IR spectrum, thermogravimetric analyzer, and scanning electron microscope. The results show that the MW irradiation method can increase the reaction rate. And the graft copolymer is also an effective metal ion adsorbent.

Optimization of synthesis condition for carboxymethyl cellulose‐based hydrogel from rice straw by microwave‐assisted method and its application in heavy metal ions removal

“…Considering the effect of MBA dose, it was found that an increase of MBA dose up to 0.7 g led to an increase of gel content. MBA plays the important role of crosslinker that has to be present in the polymer to prevent dissolution of the hydrophilic polymer chains in an aqueous environment . In general, the presence of the crosslinker MBA improved the grafting percentage .…”

“…However, gel content remarkably decreased when the amount of crosslinker was in excess. This was because a larger amount of crosslinker produces more crosslinked points in polymeric chains and increases the extent of crosslinking of the polymer network, resulting in the formation of a denser network that hinders polymer chain mobility …”

Enhanced Absorbent Products Incorporating Cellulose and Its Derivatives: A Review

“…Considerable research has been devoted to the development of copolymers in which CMC is reacted with acrylic monomers and various crosslinking agents to form SAPs (Kuwabara and Kubota 1996;Pourjavadi and Mahdavinia 2005;Pourjavadi and Ghasemzadeh 2006;Abd El-Mohdy 2007;Ibrahim et al 2007;Pourjavadi et al 2007aPourjavadi et al -b, 2008Pourjavadi et al , 2009Pourjavadi et al , 2010Suo et al 2007;Ali et al 2008;Chen et al 2008;Yang et al 2009;El-Din et al 2010;Feng et al 2010a;Lin et al 2010;Bao et al 2011;Eldin et al 2011;Huang et al 2011;Liu et al 2011;Shu et al 2011;Varaprasad et al 2011;Wang et al 2011c). Water absorbency values generally in the range of 40 to 1400 g/g have been reported in such studies, with the highest value reported by Pourjavadi et al (2008).…”

Development and Characterization of Photoinduced Acrylamide-Grafted Polylactide Films for Biomedical Applications

“…To improve surface adhesion properties of polymeric materials, irradiation and grafting techniques have been reported [5,6], such as electrical discharge [7], ozonation and grafting [8], plasma treatments and surface grafting [9,10], and also grafting through microwave [11] and UV irradiation [12]. These covalent grafting processes are very attractive as new desirable functional of different types can be introduced onto the polymer surfaces to change surface morphology, adhesiveness, and biocompatibility.…”