Chitin and chitosan based polyurethanes: A review of recent advances and prospective biomedical applications

Usman, Ali; Zia, Khalid Mahmood; Zuber, Mohammad; Tabasum, Shazia; Rehman, Saima; Zia, Fatima

doi:10.1016/j.ijbiomac.2016.02.004

Cited by 167 publications

(67 citation statements)

References 259 publications

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“…Natural substrates usually used for polyurethanes modification are vegetable oils, polysaccharides, proteins, plants fibres, poly(hydroxy acids) and poly(lactide acid) [1][2][3]. The presence of chitosan (Ch) and starch (St) in polyurethane network causes increasing the sorption properties and hydrophilicity of pure polymer [4,5]. The degradability of polyurethanes can be also affected through modification with the synthetic polymers that are equivalents of natural polymers, such as poly([d,l]-lactide) (PLA) and poly([R,S]-3-hydroxybutyrate) (R,S-PHB) [6].…”

Section: Introductionmentioning

confidence: 99%

Morphology and Physicochemical Properties of Branched Polyurethane/Biopolymer Blends

et al. 2019

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The aim of this study is the analyze the structure of branched polyurethanes based on synthetic poly([R,S]-3-hydroxybutyrate) and their blends with biopolymers and montmorillonite. The properties which would predict the potential susceptibility of these materials to degradation are also estimated. Fourier-transform infrared spectroscopy with attenuated total reflection analysis shows that poly([d,l]-lactide) is on the surfaces of polyurethanes, whereas chitosan and starch are included inside the blend network. Atomic force microscopy images have shown that the surfaces of investigated samples are heterogenous with the formation of spherulites in case of pure polyurethanes. The presence of biopolymers in the blend reduced the crystallinity of polyurethanes. Thermal stability of blends of polyurethanes with poly([d,l]-lactide) and polysaccharides decreased in comparison to pure polyurethanes. Although the tensile strength is reduced after the blending of polyurethanes with biopolymers, the elongation at break increased, especially in the case of polyurethane/poly([d,l]-lactide) blends. The presence of polysaccharides in the obtained blends caused the significant reduction of contact angle after one minute from water drop immersion. This hydrophilizing effect is the highest when montmorillonite has been incorporated into the chitosan blend. The estimated properties of the obtained materials suggest their potential sensitivity on environmental conditions.

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Section: Introductionmentioning

confidence: 99%

Morphology and Physicochemical Properties of Branched Polyurethane/Biopolymer Blends

et al. 2019

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“…They provide an unusual flexibility in both mechanical and biological properties in wide range of applications. The presence of NHCOCH 3 , NH 2 , and NHCOO groups in chitin, CS, and PU are convincingly imparts bioactive properties beneficial for biomedical applications . Therefore, several studies have been carried out to addition of CS to the PU composites structure through blending…”

Section: Introductionmentioning

confidence: 99%

Recent advance in antibacterial activity of nanoparticles contained polyurethane

Farrokhi

Ayati

Kanvisi

et al. 2018

J of Applied Polymer Sci

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Polyurethanes (PUs) are among the most widely used polymers with various applications in several industries. Antibacterial activity is an important feature of PU materials used in medical or many other related consumer products. They can, however, be easily colonized by bacteria and fungi, which may cause many problems for human health. It is therefore very important to enhance the antimicrobial properties of PUs, besides improving their chemical and physical properties. The incorporation of some antibacterial materials in the PUs' polymeric matrices is an effective strategy to improve their antibacterial activity. In this regard, the addition of some materials including Ag, Au, ZnO, and TiO2 nanoparticles, carbon nanotubes and chitosan to the PUs' material structure is reviewed in this article, and their antibacterial mechanisms are discussed. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 46997.

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“…One of those natural materials is polysaccharides such as starch, chitin, chitosan and cellulose, which have been considered by scientists as biopolymers in many different fields like medicine, industry and engineering [1]. Polysaccharides have a wide range of molecular structures B Mohammadreza Tahriri mohammadreza.tahriri@marquette.edu 1 and excellent properties, differentiating them from synthetic polymers [2]. Chitin is the second most abundant biopolymer, produced by crustaceans, fungi and shrimps [3,4].…”

Section: Introductionmentioning

confidence: 99%

UV irradiation- $$\hbox {H}_{2} \hbox {O}_{2}$$ H 2 O 2 system as an effective combined depolymerization technique to produce

et al. 2018

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UV irradiation hydrogen peroxide (H 2 O 2 ) system is used as an effective, easy and low-cost combined depolymerization technique to produce oligosaccharides from chitosan. UV-Vis spectroscopic studies explained that with increasing treatment time, the absorption of the depolymerized chitosan solution has increased, indicating the increase in the carbonyl and amino groups in their structure. Fourier transform infrared spectroscopy and nuclear magnetic resonance (1H NMR) analysis showed that the 1,4-β-d-glucoside linkages of chitosan are degraded without important changes in chemical structure of decomposed samples. X-ray diffraction patterns verified the polymerization of chitosan to produce oligomers, changing in structure from crystalline to amorphous. Viscosity-average molecular weight measurements of fragmented chitosan samples and MarkHouwink equation are used to demonstrate the efficiency of this depolymerization method. Finally, the obtained results ascertained that this combined method could produce water soluble chitosan with significant efficiency and no essential change in its chemical structure.

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Chitin and chitosan based polyurethanes: A review of recent advances and prospective biomedical applications

Cited by 167 publications

References 259 publications

Morphology and Physicochemical Properties of Branched Polyurethane/Biopolymer Blends

Morphology and Physicochemical Properties of Branched Polyurethane/Biopolymer Blends

Recent advance in antibacterial activity of nanoparticles contained polyurethane

UV irradiation- $$\hbox {H}_{2} \hbox {O}_{2}$$ H 2 O 2 system as an effective combined depolymerization technique to produce

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