Formation of nanogel aggregates by an amphiphilic cholesteryl‐poly(amidoamine) dendrimer in aqueous media

Zhang, Donghui; Hamilton, Paul D.; Kao, Jeff; Venkataraman, S.; Wooley, Karen L.; Ravi, V. Nathan

doi:10.1002/pola.21958

Cited by 19 publications

(16 citation statements)

References 32 publications

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“…Soy contains approximately 40% of protein, 20% of oil, 35% of carbohydrates, and 5% of ashes (referred to dry matter). 2,3 Several soy products with different protein content are generally available: soy protein isolate (SPI, 90%), soy protein concentrate (SPC, 72%), soy flour (SF, 56%), and soy meal 4 (SM, 48%). Soy protein possesses a complex structure, where glycine (7S) and b-conglycinin (11S) represent the major fractions, being composed of 20 aminoacids, with different SH, [&bond]OH and [&bond]NH side groups that facili-tate cross-linking reactions with other polymers.…”

Section: Introductionmentioning

confidence: 99%

Thermomechanical properties and water uptake capacity of soy protein‐based bioplastics processed by injection molding

Fernández‐Espada

Bengoechea

Cordobés

et al. 2016

J of Applied Polymer Sci

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The optimization of the processing conditions in the production of soy protein bioplastics by injection molding has been essential in order to develop materials with a great capacity to absorb water while displaying good mechanical properties. Using a 50/50 (wt/wt) soy protein/glycerol mixture, and 40 °C, 500 bar, and 70 °C as reference values for cylinder temperature, injection pressure, and mold temperature, respectively, the effect of those processing parameters over thermomechanical and hydrophilic properties was studied. Processing parameters did not show a great influence over the thermomechanical bending properties within temperatures ranging from −30 to 130 °C, as most samples displayed a similar response, independently of the parameter studied. On the other hand, when studying tensile and hydrophilic properties, the main effect corresponded to the cylinder and mold temperature values, as pressure did not exert a clear influence when increased from 300 to 900 bar. Samples with a lower water uptake were obtained when processed at higher temperature, as a result of crosslinking promotion. Moreover, a greater extensibility was observed when bioplastics are processed at high mold temperatures. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 43524.

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Section: Introductionmentioning

confidence: 99%

Thermomechanical properties and water uptake capacity of soy protein‐based bioplastics processed by injection molding

Fernández‐Espada

Bengoechea

Cordobés

et al. 2016

J of Applied Polymer Sci

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“…7 Many efforts have been made to improve their processability, flexibility, and moisture resistance by modifying them with different plasticizers and/or by blending them with other biodegradable polymers. [8][9][10] Poly[(butylene succinate)-co-adipate] (PBSA) is an interesting candidate for this purpose. It is an eco-friendly biodegradable polyester with a relatively low melting point (110 8C), exactly matching the processing temperature of ISP.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous plasticization and blending of isolate soy protein with poly[(butylene succinate)‐co‐adipate] by one‐step extrusion process

Renoux

Jagadeesh

Douchain

et al. 2018

J of Applied Polymer Sci

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This article focuses on the preparation of isolated soy protein plasticized by a glycerol and water mixture/poly[(butylene succinate)‐co‐adipate] blends by an original single step extrusion process. Prepared blends were injection‐molded and characterized for their molecular interaction, morphology, rheological, thermal, dynamic mechanical, and mechanical properties. The comparison of these results with those obtained using a more regular two‐step compounding process validates the technical efficiency of this cost‐effective one‐step approach. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46442.

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“…[31][32][33][34] One category of polymers which are considered among the most promising candidates as the soft-colloidal component for the formation of IPECs (and thus for the fabrication of responsive nanogels) with molecules of biological interest, are the hyperbranched polymers characterized by a regularly branched pattern known as dendrimers. 32,35,36 Several families of these molecules have been found appropriate for biomedical applications since they combine all the aforementioned desirable characteristics (nanosized dimensions, high responsiveness due to their ionizable groups, multivalency which enhances bioconjugation leading to higher exchange rates) with favorable mechanical properties and low toxicity levels which promotes bioavailability. [37][38][39] Specifically, those with a cationic surface have been successfully utilized in the development of efficient non-viral binding agents and vectors for oligonucleotide delivery.…”

Section: Introductionmentioning

confidence: 99%

Modeling the formation of ordered nano-assemblies comprised by dendrimers and linear polyelectrolytes: The role of Coulombic interactions

Eleftheriou

Karatasos

2012

The Journal of Chemical Physics

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Models of mixtures of peripherally charged dendrimers with oppositely charged linear polyelectrolytes in the presence of explicit solvent are studied by means of molecular dynamics simulations. Under the influence of varying strength of electrostatic interactions, these systems appear to form dynamically arrested film-like interconnected structures in the polymer-rich phase. Acting like a pseudo-thermodynamic inverse temperature, the increase of the strength of the Coulombic interactions drive the polymeric constituents of the mixture to a gradual dynamic freezing-in. The timescale of the average density fluctuations of the formed complexes initially increases in the weak electrostatic regime reaching a finite limit as the strength of electrostatic interactions grow. Although the models are overall electrically neutral, during this process the dendrimer/linear complexes develop a polar character with an excess charge mainly close to the periphery of the dendrimers. The morphological characteristics of the resulted pattern are found to depend on the size of the polymer chains on account of the distinct conformational features assumed by the complexed linear polyelectrolytes of different length. In addition, the length of the polymer chain appears to affect the dynamics of the counterions, thus affecting the ionic transport properties of the system. It appears, therefore, that the strength of electrostatic interactions together with the length of the linear polyelectrolytes are parameters to which these systems are particularly responsive, offering thus the possibility for a better control of the resulted structure and the electric properties of these soft-colloidal systems.

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Formation of nanogel aggregates by an amphiphilic cholesteryl‐poly(amidoamine) dendrimer in aqueous media

Cited by 19 publications

References 32 publications

Thermomechanical properties and water uptake capacity of soy protein‐based bioplastics processed by injection molding

Thermomechanical properties and water uptake capacity of soy protein‐based bioplastics processed by injection molding

Simultaneous plasticization and blending of isolate soy protein with poly[(butylene succinate)‐co‐adipate] by one‐step extrusion process

Modeling the formation of ordered nano-assemblies comprised by dendrimers and linear polyelectrolytes: The role of Coulombic interactions

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