GLORIA

GEOMAR Library Ocean Research Information Access

X

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Online Resource
    Online Resource
    Preparation and characterization of chitosan grafted poly(lactic acid) films for biomedical composites
    Walter de Gruyter GmbH ; 2020
    In:  Journal of Polymer Engineering Vol. 40, No. 4 ( 2020-04-28), p. 333-341
    Details
    In: Journal of Polymer Engineering, Walter de Gruyter GmbH, Vol. 40, No. 4 ( 2020-04-28), p. 333-341
    Abstract: Polymer composites offer a great advantage in biomedical field over the traditional materials used like, metal, ceramics, or polymer alone. Polymer composites provide tailor-made facilities to design required physiological and mechanical properties in biomedical products. Poly(lactic acid) (PLA) is a popular aliphatic polyester used in various biomedical products because they have a renewable source and after resorption they enter well into the Krebs cycle of the human body. However, PLA suffers from hydrolysis and subsequent weight loss in aqueous environment. To improve the hydrolytic properties of hydrophobic PLA and to incorporate the biocompatibility from chitosan (CS) into it, in this study CS has been grafted onto PLA film. CS with 78% of degree of deacetylation and viscosity average molecular weight of about 8,31,760 Da was grafted onto hydrolyzed PLA film surface. Kjeldahl analysis confirmed the attachment of CS onto the PLA films. From thermal stability analysis, it was observed that percentage of weight retention at 600°C of the CS-g-PLA was around 15% higher than that of pure PLA. The mechanical properties of final CS-grafted-PLA composites showed more resistance to hydrolytic degradation than that of pure PLA film.
    Type of Medium: Online Resource
    ISSN: 2191-0340 , 0334-6447
    URL: Article
    DOI: 10.1515/polyeng-2019-0312
    Language: English
    Publisher: Walter de Gruyter GmbH
    Publication Date: 2020
    detail.hit.zdb_id: 2602430-5
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 2
    Online Resource
    Online Resource
    Application of Chitosan-Clay Biocomposite Beads for Removal of Heavy Metal and Dye from Industrial Effluent
    MDPI AG ; 2020
    In:  Journal of Composites Science Vol. 4, No. 1 ( 2020-02-01), p. 16-
    Details
    In: Journal of Composites Science, MDPI AG, Vol. 4, No. 1 ( 2020-02-01), p. 16-
    Abstract: In recent years, there has been increasing interest in developing green biocomposite for industrial wastewater treatment. In this study, prawn-shell-derived chitosan (CHT) and kaolinite rich modified clay (MC) were used to fabricate biocomposite beads with different compositions. Prepared composite beads were characterized by FTIR, and XRD, and SEM. The possible application of the beads was evaluated primarily by measuring the adsorption efficiency in standard models of lead (II) and methylene blue (MB) dye solution, and the results show a promising removal efficiency. In addition, the composites were used to remove Cr (VI), Pb (II), and MB from real industrial effluents. From tannery effluent, 50.90% of chromium and 39.50% of lead ions were removed by composites rich in chitosan and 31.50% of MB was removed from textile effluent by a composite rich in clay. Moreover, the composite beads were found to be activated in both acidic and basic media depending on their composition, which gives a scope to their universal application in dye and heavy metal removal from wastewater from various industries.
    Type of Medium: Online Resource
    ISSN: 2504-477X
    URL: Article
    DOI: 10.3390/jcs4010016
    Language: English
    Publisher: MDPI AG
    Publication Date: 2020
    detail.hit.zdb_id: 2911719-7
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 3
    Online Resource
    Online Resource
    γ -Irradiated gelatin and polyvinyl alcohol films as artificial articular cartilage
    SAGE Publications ; 2020
    In:  Journal of Thermoplastic Composite Materials Vol. 33, No. 5 ( 2020-05), p. 614-627
    Details
    In: Journal of Thermoplastic Composite Materials, SAGE Publications, Vol. 33, No. 5 ( 2020-05), p. 614-627
    Abstract: Both gelatin and polyvinyl alcohol polymers have good biocompatibility to be used in biomedical applications. Cell adhesion and growth activity of gelatin have made it unique in artificial cartilage preparation. Two separate solutions of them are prepared by mixing 10% (w/v) of each one in water. These two solutions are then mixed at a temperature range of 70–90°C, and a pH value of 2 is maintained and finally it is cast into films. The dried films are gamma irradiated (using 60 Co) at different doses. Fourier transform infrared analysis of the films shows the presence of amide linkages formed in them. It is observed from thermogravimetric analysis that 2.6% of non-irradiated and 20% of irradiated samples retain after heating them up to 600°C. Mechanical properties of the irradiated films show better properties than that of non-irradiated one. The irradiated films show a decrease in water uptake than that of the non-irradiated films. Scanning electron microscopy does not show any significant difference in morphology of the films with increasing radiation doses.
    Type of Medium: Online Resource
    ISSN: 0892-7057 , 1530-7980
    URL: Article
    DOI: 10.1177/0892705718808555
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2020
    detail.hit.zdb_id: 2098671-3
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...