Compatible compositions based on aqueous polyurethane dispersions and sodium alginate

Daemi, Hamed; Barikani, Mehdi; Barmar, Mohammad

doi:10.1016/j.carbpol.2012.09.046

Cited by 83 publications

(33 citation statements)

References 26 publications

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“…a and b, it can be seen that weak peaks appeared within the range of 6.2–6.31 ppm of the 1 H‐NMR curve for IPDIPU and HDIPU. The absorption peaks were attributed to the characteristic absorption peaks of the cis and trans conformations of NH in the urethane group . This proved that the aliphatic HDI or IPDI used as a hard segment in the PCLPU compatibilizer reacted with the PCL diol as the soft segment to generate urethane bonds which suggested that the reaction was successful.…”

Section: Resultsmentioning

confidence: 82%

Preparation and properties of compatible starch-polycaprolactone composites: Effects of hard segments in the polyurethane compatibilizer

Koranteng

Zhang

et al. 2016

Starch - Stärke

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In this study, polycaprolactone (PCL)‐based polyurethane prepolymers (PCLPU) with different types of hard‐segments were used as compatibilizers to prepare compatible starch‐PCL composites in an intensive mixer. The effects of the hard‐segments in the PCLPU compatibilizers on the structure and properties of the compatible starch‐PCL composite were analyzed thoroughly. The results showed that the addition of the PCLPU compatibilizer to the composites successfully improved the compatibility between starch and PCL. Also, since the NCO content of the different PCLPU compatibilizers was similar, the major factor that affected the structure and properties of the compatible starch‐PCL composites was the difference in the interactions between the PCL matrix and the different PCLPU compatibilizers. The physical crosslinking between the PCL matrix and the PCLPU with aromatic diisocyanate‐based hard‐segments was stronger than that between the PCL matrix and the PCLPU with aliphatic diisocyanate‐based hard‐segments due to the smaller degree of phase separation that occurred in the PCLPU with aromatic diisocyanate‐based hard‐segments. Additionally, analyses of the emission scanning electron microscopy (SEM), differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), wide‐angle X‐ray diffraction (WAXRD), and mechanical testing results of the composites showed that the compatibility between the starch and the PCL was improved significantly by the existence of the strong physical cross‐linking between the PCLPU compatibilizer and the PCL matrix. Toward this end, the PCLPU with aromatic diisocyanate‐based hard‐segments improved the compatibility between the starch and the PCL better than the PCLPU with aliphatic diisocyanate‐based hard‐segments, and thereby boosted the overall performance of the composite materials to a higher degree.

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Section: Resultsmentioning

confidence: 82%

Preparation and properties of compatible starch-polycaprolactone composites: Effects of hard segments in the polyurethane compatibilizer

Koranteng

Zhang

et al. 2016

Starch - Stärke

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“…The asymmetric and symmetric stretching vibrations of the CaA carboxylate group (COO − ) were located at 1614 and 1427 cm −1 . The bands at 1030 and 941 were attributed to CO stretching vibrations of the glucoside rings . Compared with CaA, the spectrum of PU‐ g ‐CaA showed two new peaks at 1720 and 1246 cm −1 , which originated from the CO and CN stretching vibrations of secondary amide.…”

Section: Resultsmentioning

confidence: 98%

Protein‐imprinted polyurethane‐grafted calcium alginate hydrogel microspheres

Ying

Liu

et al. 2015

J of Applied Polymer Sci

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Protein-imprinted polyurethane-grafted calcium alginate hydrogel microspheres were prepared and characterized. The samples were investigated with optical microscopy, scanning electron microscopy, 13 C-NMR, and Fourier transform infrared spectroscopy. We proved that polyurethane side chains were successfully grafted, and this led to a relatively rough and dense surface. The samples exhibited better swelling durability when applied in specific adsorption tests. The adsorption kinetic and recognition properties indicated that the imprinted modified microspheres had excellent rebinding affinity toward the target proteins. Moreover, the influence of the preassembly pH, rebinding pH, and grafting ratio on the adsorption capacity and imprinting efficiency (IE) were systematically investigated. The study results suggest that the modified samples possessed a higher IE toward the target protein under the optimum pH and grafting ratio. Upon polyurethane grafting modification, the alginate hydrogel microspheres showed improved mechanical stability and recognition specificity.

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“…A few reports have also been available on the structural characterization of chitin-based polyurethane elastomers and their shape memory characteristics [22,23]. The professional literature and scientific writings have reported possible applications, preparation and properties of hydroxy terminated polybutadiene based smart materials [24]. The antimicrobial activity of chitin, chitosan and their derivatives against different groups of microorganisms, such as bacteria, yeast, and fungi, has received considerable attention in recent years [25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Chitin based polyurethanes using hydroxyl terminated polybutadiene, part III: Surface characteristics

Zia

Zuber

Saif

et al. 2013

International Journal of Biological Macromolecules

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Hydroxy terminated polybutadiene (HTPB)-chitin based polyurethanes (PUs) with controlled hydrophobicity were synthesized using HTPB and toluene diisocyanate (TDI). The prepolymer was extended with different mass ratios of chitin and 1,4-butane diol (BDO). The effect of chitin contents in chain extender (CE) proportions on surface properties was studied and investigated. Incorporation of chitin contents into the final PU showed decrease in contact angle value of water drop, water absorption (%) and swelling behavior. The antibacterial activity of the prepared samples was affected by varying the chitin contents in the chemical composition of the final PU. The results demonstrated that the use of prepared material can be suggested as non-absorbable suture.

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Compatible compositions based on aqueous polyurethane dispersions and sodium alginate

Cited by 83 publications

References 26 publications

Preparation and properties of compatible starch-polycaprolactone composites: Effects of hard segments in the polyurethane compatibilizer

Preparation and properties of compatible starch-polycaprolactone composites: Effects of hard segments in the polyurethane compatibilizer

Protein‐imprinted polyurethane‐grafted calcium alginate hydrogel microspheres

Chitin based polyurethanes using hydroxyl terminated polybutadiene, part III: Surface characteristics

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