Facile preparation of polyacrylamide/chitosan/Fe3O4
Hosseinzadeh and Javadi (2016) synthesized magnetic super absorbent hydrogel nanocomposites (MSHNs) based on carboxymethyl cellulose via a facile “one‐pot” two step approach and studied the adsorption experiments of crystal violet dye onto MSHNs. Their findings include valuable and highly relevant information on the design and processing of hydrogels for adsorption and separation purposes.
Superabsorbent hydrogels were prepared by grafting copolymerization of cross-linked polyacrylamide chains onto carboxymethyl cellulose (CMC) via a free radical polymerization method. These graft copolymers hydrogel were characterized by infrared spectroscopy, thermogravimetric analysis, and scanning electron microscopy.
Synthesis and application of polyacrylamide grafted
In this study, a new polyacrylamide grafted onto magnetic cellulose (PAM-g-MagCell) was successfully produced by microwave assisted synthesis and used as flocculant for the removal of total suspended solid (TSS), turbidity, chemical oxygen demand (COD) and colour.
(COD) and colour. In this study, a new polyacrylamide grafted onto magnetic cellulose extracted from oil palm empty fruit bunch (PAM-g-mcOPEFB) was successfully synthesised by using a microwave assisted synthesis method. The physical and chemical properties of PAM-g-mcOPEFB was characterized by using
Ultrasound assisted polyacrylamide grafting on nano
Polyacrylamide has been grafted onto nanofibrillated cellulose (NFC-g-PAM) under mild conditions. This was accomplished by developing and optimizing an ultrasound assisted protocol in the presence of potassium persulfate initiator. The synthesis was optimized on the basis of maximizing grafting percentage and grafting efficiency by varying the initiator and monomer concentration.
Graft copolymers of acrylamide on cellulose materials (α‐cellulose 55.8%, DP 287.3) obtained from Terminalia superba wood meal and its carboxymethylated derivative (DS 0.438) were prepared using a ceric ion initiator and batch polymerization and modified batch polymerization processes. The extent of graft polymer formation was measured in graft level, grafting efficiency, molecular weight
A facile strategy towards heterogeneous preparation
However, it is still challenging to manufacture natural cellulose products by environmentally friendly thermoplastic processing methods. Herein, we proposed a green approach for the heterogeneous preparation of thermoplastic cellulose grafted polyurethane (RCP-g-PU) from amorphous regenerated cellulose paste (RCP) via hydroxyl/isocyanate chemistry.
Graft modification is an excellent way to prepare cellulose nanocrystals (CNCs) with various functions. In this work, different water-soluble macro reversible addition fragmentation chain transfer (macroRAFT) agents were used to mediate grafting of polyacrylamide with cellulose nanocrystals. Fourier-transform infrared spectroscopy, 13C solid-state nuclear magnetic resonance (NMR), X-ray
Superabsorbent polyacrylamide grafted carboxymethyl
Superabsorbent polyacrylamide grafted carboxymethyl cellulose pH sensitive hydrogel: I. Preparation and characterization M.S. Mohy Eldin Polymer Materials Research Department , Advanced Technology and New Materials Research Institute, Mubarak City for Scientific Research and Technology Applications , New Boarg Al-Arab City , 21934 , Alexandria
Synthesis and application of polyacrylamide grafted magnetic cellulose flocculant for palm oil wastewater treatment. Highlights•Polyacrylamide grafted onto magnetic cellulose was synthesized via microwave-assisted.•Palm oil mill effluent was selected to evaluate the flocculation efficiency.•Synthesized flocculant shows a superiority when compared with alum.AbstractAccumulation of organic
Graft copolymer of acrylamide onto cellulose as mercury
Polyacrylamide grafted onto cellulose has been demonstrated to be a very efficient selective sorbent for removal of mercuric ions from aqueous solutions. The mercury-uptake capacity of the graft polymer is as high as 3.55 mmol/g and sorption is also reasonably fast. Thus, 0.2 g of the graft copolymer is able to extract 50 ppm Hg(II) from 50 ml
Das R, Panda AB, Pal S (2012) Synthesis and characterization of a novel polymeric hydrogel based on hydroxypropyl methyl cellulose grafted with polyacrylamide. Cellulose 19(3):933–945 CrossRef
- What are the commercial applications of modified polyacrylamide hydrogels?
- Modified polyacrylamide hydrogels find various commercial applications such as recovery of secondary oil, stabilization of mineral sedimentation, purification of wastewater and metal extraction , .
- How are modified polyacrylamides obtained?
- In previous works, modified polyacrylamides have been obtained from linear polyacrylamides by various modification reactions such as Mannich , Hofmann , or by copolymerization of different functional monomers, such as dimethylaminoethyl methacrylate, 2-acrylamidopropane sulfonic acid, 3-acrylamido-3-methylbutanoic acid , , .
- What is the metal ion removal capacity of modified crosslinked polyacrylamide?
- However, the modified crosslinked polyacrylamides had high metal ion removal capacities and different selectivities as seen from Fig. 4. The M8 polymer which was prepared with EDA had the total metal removal capacity of 2.45 mmol/l and was not significantly selective to any metal ion.
- Does polyacrylamide swell a hydrogel?
- The swelling of the synthesized hydrogels was another property that was investigated in prepared hydrogels. Polyacrylamide is a water-soluble polymer with a high affinity towards water, and several works have reported PAAm hydrogels with high swelling capabilities [ 50, 51 ].
