Polymerisation onto Biological Templates, a New Way to Obtain Bioartificial Polymeric Materials

Cristallini, Caterina; Barbani, Niccoletta; Giusti, P.; Lazzeri, Luigi; Cascone, Maria Grazia; Ciardelli, Gianluca

doi:10.1002/1521-3935(20010601)202:10<2104::aid-macp2104>3.0.co;2-h

Cited by 21 publications

(9 citation statements)

References 29 publications

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“…Specific interactions have also been reported in blends between poly(acrylic acid) (PAA) and various water-soluble polysaccharides. [3,[10][11][12][13][14][15] Complete miscibility as a rule is attributed to the strong intermacromolecular hydrogen bonding between the component polymers. Studies on blends of water-soluble polysaccharides and carboxylic acid copolymers containing the groups, which are not able to form hydrogen bonds, are quite limited.…”

Section: Introductionmentioning

confidence: 99%

Characterisation of Blends Based on Hydroxyethylcellulose and Maleic Acid‐alt‐Methyl Vinyl Ether

Khutoryanskaya

Khutoryanskiy

Pethrick

2005

Macro Chemistry & Physics

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Summary: Hydrophilic polymeric films based on blends of hydroxyethylcellulose and maleic acid‐co‐methyl vinyl ether were produced by casting from aqueous solutions. The physicochemical properties of the blends have been assessed using Fourier transform infrared spectroscopy, thermal gravimetric analysis, differential scanning calorimetry, dielectric spectroscopy, etc. The pristine films exhibit complete miscibility due to the formation of intermacromolecular hydrogen bonding. The thermal treatment of the blend films leads to cross‐linking via intermacromolecular esterification and anhydride formation. The cross‐linked materials are able to swell in water and their swelling degree can be easily controlled by temperature and thermal treatment time. The formation of the crosslinks is apparent in the dynamic properties of the blends as observed through the mechanical relaxation and dielectric relaxation spectra. The dielectric characteristics of the material are influenced by the effects of change in the local structure of the blend on the ionic conduction processes and the rate of dipolar relaxation. Separation of these processes is attempted using the dielectric modulus method. Significant deviations from a simple additive rule of mixing on the activation energy are observed consistent with hydrogen bonding and crosslinking of the matrix. This paper indicates a method for the creation of films with good mechanical and physical characteristics by exposing the blends to a relatively mild thermal treatment.

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Section: Introductionmentioning

confidence: 99%

Characterisation of Blends Based on Hydroxyethylcellulose and Maleic Acid‐alt‐Methyl Vinyl Ether

Khutoryanskaya

Khutoryanskiy

Pethrick

2005

Macro Chemistry & Physics

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“…The polymerization of synthetic monomers onto biological templates produces a higher degree of miscibility between the two components than the simple mixing of preformed polymers [7]. Hydrogen bonding is one of the main interactions involved in the realisation of such materials.…”

Section: Bioartificial Polymeric Materialsmentioning

confidence: 99%

“…The polymerization rate is in fact maximised for an equimolar concentration of AA and dextran and doubled with respect to the rate of AA blank polymerization [7].…”

Section: Bioartificial Polymeric Materialsmentioning

confidence: 99%

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The relevance of the transfer of molecular information between natural and synthetic materials in the realisation of biomedical devices with enhanced properties

Ciardelli

Silvestri²,

Cristallini³

et al. 2005

Journal of Biomaterials Science, Polymer Edition

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Past and recent attempts to introduce in synthetic polymers molecular information from natural substances through simple blending, template polymerization and molecular imprinting are reviewed. The most promising approaches that can open the way to the realisation of new materials with improved biocompatibility, antibody- or enzyme-like performances are analysed more deeply. The realisation of bioartificial blends from natural and synthetic polymers, molecularly imprinted nanospheres or membranes that can act as recognition element in (bio)sensing devices, as synthetic enzymes or as key constituents of body fluids purification tools is presented in order to make the reader aware of the fascinating possibilities that these techniques make available to the biomedical science and engineering in the close future. The last part of the paper describes recent attempts to insert recognition elements for large molecules as proteins, DNA segments, viruses or whole cells in synthetic polymer systems, in order to develop new systems in the treatments of diseases and for tissue-engineering applications.

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“…The presence of heavy metal in environment is of major concern because of their transformation from relatively low toxic species into more toxic ones [3]. This review presents the developments in this area and identifies the defficiences in existing chitosan research by reviewing the equilibrium studies carried out to determine the capacity of chitosan for various metal ions [4]. To improve chitosan's performance as an adsorbent, crosslinking reagents such as glyoxal, formaldehyde, glutaraldehyde, epichlorohydrin, ethylene glycon, diglycidyl ether and isocyanates have been used [5].…”

Section: Introductionmentioning

confidence: 99%

Studying physico-mechanical properties of maleic acid grafted chitosan with metal as slow release fertilizers

Negim

Bekbayeva²,

Jumabayeva³

et al. 2015

IJBAS

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Chitosan (CS) was successfully grafted with maleic acid (MA) in 1% acetic acid solution by using potassium persulfate (KPS) as the initiator. The grafting yield (GY) up to 84.25 % and grafting efficiency (GE) of 64.82 % were achieved. The formation of grafted chitosan was confirmed with usual spectroscopic methods and thermal analysis. The raw grafted chitosan was mixed with Na + , Mg 2+ and Ca 2+ in aqueous hydroxide solution and K + in aqueous chromate solution. The reaction mixtures were separated from excess unreacted maleic acid and characterized as a reacted grafted chitosan. The results showed a new form of maleic grafted chitosan after the reaction with metals. Also, grafted of CS with MA provide a promising set of materials for potential slow release fertilizer applications.

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Polymerisation onto Biological Templates, a New Way to Obtain Bioartificial Polymeric Materials

Cited by 21 publications

References 29 publications

Characterisation of Blends Based on Hydroxyethylcellulose and Maleic Acid‐alt‐Methyl Vinyl Ether

Characterisation of Blends Based on Hydroxyethylcellulose and Maleic Acid‐alt‐Methyl Vinyl Ether

The relevance of the transfer of molecular information between natural and synthetic materials in the realisation of biomedical devices with enhanced properties

Studying physico-mechanical properties of maleic acid grafted chitosan with metal as slow release fertilizers

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