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  • Wiley  (5)
  • 1
    Online Resource
    Online Resource
    Fabrication of nanocellulose loaded poly(AA‐ co ‐HEMA) hydrogels for ceftriaxone controlled delivery and crystal violet adsorption
    Wiley ; 2019
    In:  Polymer Composites Vol. 40, No. S1 ( 2019-01)
    Details
    In: Polymer Composites, Wiley, Vol. 40, No. S1 ( 2019-01)
    Abstract: Superabsorbent polymer nanocomposites (SAPCs) are very promising and versatile materials for biomedical applications. In this research work, we focused on a novel nanocellulose‐based SAPC, poly(acrylic acid‐ co ‐2‐hyderoxy ethyl methacrylate)‐grafted cellulose nanocrystal (CNC) composite, P(AA‐ co ‐HEMA)‐ g ‐CNC as a potential drug delivery vehicle and a dye adsorbent. Ceftriaxone and crystal violet were selected as a model drug and dye, respectively. P(AA‐ co ‐HEMA)‐ g ‐CNC was synthesized by graft copolymerization reaction and the product was characterized by FTIR spectroscopy. A proposed mechanism for SAPC formation was suggested and the morphology of the sample was studied by SEM spectroscopy. The swelling of SAPCs was examined in buffer solutions with pH ranged 4‐12. The product exhibited a pH‐responsiveness character so that a swelling‐deswelling pulsatile behavior was recorded at pHs 2 and 8. Drug loading efficiency and drug release profiles of the P(AA‐ co ‐HEMA)‐ g ‐CNC as well as the dye adsorption behavior were studied in detail. Maximum drug encapsulation efficiency and dye adsorption capacity were found to be 89% and 231 mg g −1 , respectively. Conclusively, the obtained results indicated that the synthesized SAPCs could be successfully used as promising drug delivery systems and dye adsorbent materials in wastewater treatment. POLYM. COMPOS., 40:E559–E569, 2019. © 2018 Society of Plastics Engineers
    Type of Medium: Online Resource
    ISSN: 0272-8397 , 1548-0569
    URL: Issue
    URL: Article
    DOI: 10.1002/pc.v40.s1
    DOI: 10.1002/pc.24875
    Language: English
    Publisher: Wiley
    Publication Date: 2019
    detail.hit.zdb_id: 1475935-4
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  • 2
    Online Resource
    Online Resource
    Synthesis of multiresponsive β‐cyclodextrin nanocomposite through surface RAFT polymerization for controlled drug delivery
    Wiley ; 2019
    In:  Polymers for Advanced Technologies Vol. 30, No. 11 ( 2019-11), p. 2860-2871
    Details
    In: Polymers for Advanced Technologies, Wiley, Vol. 30, No. 11 ( 2019-11), p. 2860-2871
    Abstract: In this study, a unique magnetic, pH, and thermo‐responsive hydrogel nanocomposite was synthesized via surface reversible addition fragmentation chain transfer (RAFT) copolymerization of acrylic acid (AA) and N‐isopropyl acrylamide (NIPAM) in the presence of magnetic β‐cyclodextrin (β‐CD). The nanocomposite demonstrated a pH‐responsiveness behavior at pHs 3 and 9. Moreover, swelling behaviors of nanocomposite were measured in solutions with various temperatures. Furthermore, the nanocomposites exhibited high swelling capacity by applying an external magnetic field because of the presence of Fe 3 O 4 nanoparticles in the polymer structure. Besides, the doxorubicin (DOX) loading and releasing behaviors of the hydrogel nanocomposites were studied because of the stimuli‐responsive properties of the synthesized carriers. The adsorption of DOX obeyed a pseudo‐second‐order model and fitted well to the Langmuir isotherm model with the maximum adsorption capacity uptake of 291 mg g −1 . In conclusion, the hydrogel nanocomposites were found to be as potential nanocarriers for use in controlled release applications.
    Type of Medium: Online Resource
    ISSN: 1042-7147 , 1099-1581
    URL: Issue
    URL: Article
    DOI: 10.1002/pat.v30.11
    DOI: 10.1002/pat.4718
    RVK:
    VA 6586
    Language: English
    Publisher: Wiley
    Publication Date: 2019
    detail.hit.zdb_id: 1481102-9
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  • 3
    Online Resource
    Online Resource
    TGA investigation and morphological properties study of nanocrystalline cellulose/ag‐nanoparticles nanocomposites for catalytic control of oxidative polymerization of aniline
    Wiley ; 2019
    In:  Polymer Composites Vol. 40, No. S1 ( 2019-01)
    Details
    In: Polymer Composites, Wiley, Vol. 40, No. S1 ( 2019-01)
    Abstract: Polyaniline (PANI) and PANI/nanocrystalline cellulose (NCC)/silver nanoparticles (AgNPs) nanocomposites have been prepared via in situ oxidative polymerization of aniline in the presence of NCC and AgNPs in green mediate using sugar beet leaf extracts. A series of nanocomposites has been synthesized by varying the concentrations of AgNPs (0, 1, 4, and 8%) along with 2 wt% of NCC. The control on oxidative polymerization for aniline has been studied using fabricated nanocomposites as catalysts. Various analysis techniques, including UV‐visible spectroscopy, X‐ray diffraction, and transmission electron microscopy, were adopted to confirm the Nano‐sized AgNPs. The characteristic peaks of PANI and its nanocomposites were observed in the Fourier transfer infrared spectra of the nanocomposites, indicating the incorporation of NCC and AgNPs in the nanocomposite structure. Using three mathematical models, namely, Horowitz–Metzger, Coats–Redfern, and Broido methods, thermal degradation and kinetic parameters of the composites have been calculated for each step of thermal degradation. POLYM. COMPOS., 40:E753–E764, 2019. © 2018 Society of Plastics Engineers
    Type of Medium: Online Resource
    ISSN: 0272-8397 , 1548-0569
    URL: Issue
    URL: Article
    DOI: 10.1002/pc.v40.s1
    DOI: 10.1002/pc.25000
    Language: English
    Publisher: Wiley
    Publication Date: 2019
    detail.hit.zdb_id: 1475935-4
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  • 4
    Online Resource
    Online Resource
    Studies on coconut shell powder and crysnanoclay incorporated acrylonitrile‐butadiene rubber/ styrene butadiene rubber (NBR/SBR) green nanocomposites
    Wiley ; 2017
    In:  Polymer Composites Vol. 38, No. 4 ( 2017-04), p. 727-735
    Details
    In: Polymer Composites, Wiley, Vol. 38, No. 4 ( 2017-04), p. 727-735
    Abstract: The development of commercially viable “green products” based on natural resources for both matrices and reinforcements for a wide range of applications is on the rise. This effort includes new pathways to produce natural polymers with better mechanical properties and thermal stability using nanotechnology and use of naturally occurring fillers such as lignocellulosic and hemicellulose to make biodegradable rubber composites. The blends of acrylonitrile butadiene rubber (NBR) and styrene butadiene rubber (SBR) with coconut shell powder (CSP) have been prepared by using a compounding technique in presence of different amounts of crysnanoclay (CN). The effect of CN loading on tensile properties, thermal properties, swelling behavior, and water uptake behavior were studied. Significant improvement of Young's modulus and tensile strength was observed as a result of addition of nanoclay to the rubber matrix especially at 10 wt% loading. Presence of CSP resulted in ahigher in water sorption but after incorporation of CN the water sorption tended to decrease. Thermal characteristics were performed using thermogravimetric analysis (TGA). TGA thermograms indicated that incorporation of CSP filler decreases the thermal stability of nanocomposites. The dispersion of CSP and CN in rubber matrix was analyzed from scanning electron microscopy. POLYM. COMPOS., 38:727–735, 2017. © 2015 Society of Plastics Engineers
    Type of Medium: Online Resource
    ISSN: 0272-8397 , 1548-0569
    URL: Issue
    URL: Article
    DOI: 10.1002/pc.v38.4
    DOI: 10.1002/pc.23632
    Language: English
    Publisher: Wiley
    Publication Date: 2017
    detail.hit.zdb_id: 1475935-4
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  • 5
    Online Resource
    Online Resource
    Physicomechanical, dynamic mechanical, and morphological properties of Polyurethane/NCC/AgNP nanocomposites and their application in removal of heavy metals from wastewater
    Wiley ; 2019
    In:  Polymer Composites Vol. 40, No. 10 ( 2019-10), p. 4004-4012
    Details
    In: Polymer Composites, Wiley, Vol. 40, No. 10 ( 2019-10), p. 4004-4012
    Abstract: Silver nanoparticles (AgNPs) were rapidly synthesized using sugar beet leaf extract, and the formation of nanoparticles was observed within 3 h. AgNPs uniformly were reacted onto the surface of nanocrystal cellulose (NCC) via complexation leading to NCC/AgNPs, (NCC/Ag) nanohybrids with varying concentration of AgNPs (0, 1, 4, 8, and 10%) along with 2 wt% of NCC. Polyurethane (PU) and PU/NCC/AgNPs were synthesized via in situ polymerization by varying the concentration of AgNPs (0, 1, 4, 8, and 10%) along with 2 wt% of NCC. The results recorded from transmission electron microscopy and X‐ray diffraction support the biosynthesis and characterization of AgNPs. The effects of NCC/AgNP content on the physicomechanical properties involving density, tensile behavior, and surface hardness of the nanocomposites have been measured. The effects of the NCC/AgNP content on the viscoelastic properties of PU were investigated using dynamic mechanical analysis (DMA). From DMA analysis, it has been noted that the incorporation of NCC/AgNPs leads to a change in T g . The PU and PU/NCC/AgNP nanocomposites were employed as an excellent adsorbent for the adsorption of nickel (II) and lead (II) ions. The results indicated that ion adsorption basically relies on adsorbing time, solution pH, initial nickel and lead concentration, and adsorbent dosage. POLYM. COMPOS., 40:4004–4012, 2019. © 2019 Society of Plastics Engineers
    Type of Medium: Online Resource
    ISSN: 0272-8397 , 1548-0569
    URL: Issue
    URL: Article
    DOI: 10.1002/pc.v40.10
    DOI: 10.1002/pc.25261
    Language: English
    Publisher: Wiley
    Publication Date: 2019
    detail.hit.zdb_id: 1475935-4
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