Linear polyamidoamines as novel biocompatible phosphorus-free surface-confined intumescent flame retardants for cotton fabrics

Manfredi, Amedea; Carosio, Federico; Ferruti, Paolo; Ranucci, Elisabetta; Alongi, Jenny

doi:10.1016/j.polymdegradstab.2018.02.020

Cited by 56 publications

(70 citation statements)

References 34 publications

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“…The thermogravimetric analysis (TGA) of ISA23-ND in air showed different weight loss steps, with complete degradation at ~600 °C (see Figure 1b), similarly to what previously observed for ISA23 [42].…”

Section: Synthesis Of Isa23-nitrodopamine Copolymer Conjugatesupporting

confidence: 82%

A new catechol-functionalized polyamidoamine as an effective SPION stabilizer

Galli

Rossotti

Arosio

et al. 2019

Colloids and Surfaces B: Biointerfaces

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Highlights    Catechol-functionalization of a polyamidoamine for tight linkage to SPION surface size 100±28 nm). SPION@ISA23-ND were re-suspended after lyophilization reverting to their pristine dimensions. The SPION@ISA23-ND adsorption of BSA in water, considered as the first stage of phagocytosis, was very low, suggesting that ISA23 could impart stealthiness to SPION@ISA23-ND. 1 H-NMR relaxivity measurements showed an r2 value of 158 s-1 mmol-1 L (vs 100 s-1 mmol-1 L for Endorem) at relevant clinical fields for magnetic resonance imaging (from 0.2 to 1.5 T). SPION@ISA23-ND was tested on HeLa cells and their internalization was visualized by reflectance microscopy. Finally, with the aim of prepare a new dual magneto-optical system, a synthetic procedure to decorate SPION@ISA23-ND with a fluorescent dye was devised, even though the emission intensity of the resultant conjugate was lower than expected, possibly due to luminescence quenching caused by the closeness of emitting moieties to the SPION surface.

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Section: Synthesis Of Isa23-nitrodopamine Copolymer Conjugatesupporting

confidence: 82%

A new catechol-functionalized polyamidoamine as an effective SPION stabilizer

Galli

Rossotti

Arosio

et al. 2019

Colloids and Surfaces B: Biointerfaces

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“…A different class of stimuli responsive polymers based on α-amino acids, named polyamidoamino acids (PAACs), has been obtained by the Michael-type polyaddition of α-amino acids with bisacrylamides, as for instance N,N'-methylenebisacrylamide [24][25][26][27][28][29][30], 2,2'-bis(acrylamidoacetic) acid [29][30][31], and 1,4-bis(acryloyl)piperazine [32]. In particular, the PAAC named L-ARGO7 was obtained from N,N'-methylenebisacrylamide and L-arginine [24].…”

Section: Introductionmentioning

confidence: 99%

pH-Dependent Chiral Recognition of D- and L-Arginine Derived Polyamidoamino Acids by Self-Assembled Sodium Deoxycholate

et al. 2020

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D- and L-arginine-based polyamidoamino acids, called D- and L-ARGO7, retain the chirality and acid/base properties of the parent α-amino acids and show pH-dependent self-structuring in water. The ability of the ARGO7 chiral isomers to selectively interact with chiral biomolecules and/or surfaces was studied by choosing sodium deoxycholate (NaDC) as a model chiral biomolecule for its ability to self-assembly into globular micelles, showing enantio-selectivity. To this purpose, mixtures of NaDC with D-, L- or D,L-ARGO7, respectively, in water were analysed by circular dichroism (CD) spectroscopy and small-angle neutron scattering (SANS) at different levels of acidity expressed in terms of pD and concentrations. Differences in the CD spectra indicated chiral discrimination for NaDC/ARGO7 mixtures in the gel phase (pD 7.30) but not in the solution phase (pD 9.06). SANS measurements confirmed large scale structural perturbation induced by this chiral discrimination in the gel phase yet no modulation of the structure in the solution phase. Together, these techniques shed light on the mechanism by which ARGO7 stereoisomers modify the morphology of NaDC micelles as a function of pH. This work demonstrates chirality-dependent interactions that drive structural evolution and phase behaviour of NaDC, opening the way for designing novel smart drug delivery systems.

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“…[3][4][5][6][7][8][9][10][11] Flexible polyurethane (FPU) is a unique class of thermoset elastomer that offers both good properties of convenient polyurethane and other special properties including high impact strength, long cycle life, and exceptional surface finish. 1,2 Thus, various approaches had been investigated in order to inhibiting the ignition of fabrics or at least to minimise the rate of flame spread, most notably was the incorporation of chemical species called flame retardants (FRs).…”

Section: Introductionmentioning

confidence: 99%

“…1,2 Thus, various approaches had been investigated in order to inhibiting the ignition of fabrics or at least to minimise the rate of flame spread, most notably was the incorporation of chemical species called flame retardants (FRs). [3][4][5][6][7][8][9][10][11] Flexible polyurethane (FPU) is a unique class of thermoset elastomer that offers both good properties of convenient polyurethane and other special properties including high impact strength, long cycle life, and exceptional surface finish. 12 Thus, this material is undeniably a good candidate for surface coating applications or in particular coating for flame-resistant textiles-which requires both good flame-retardant properties, flexibility, and long cycle life after repeated deformation.…”

Section: Introductionmentioning

confidence: 99%

“…[16][17][18] The development of FR additives for polymer in general, and for polyurethane in particular, is also a heavily investigated subject. [19][20][21][22] Out of them, the combination of alumina trihydrate Al 2 O 3 .3H 2 O and triphenyl phosphate (C 6 H 5 O) 3 PO showed good potential, as they are both low-cost and commercially available FR with proven good synergistic effect when utilised together. 23 However, fire resistant is not the only important property of FR polymer, as under the right conditions, almost every polymer shall eventually catch fire or thermally decompose into gaseous substances.…”

Section: Introductionmentioning

confidence: 99%

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Halogen‐free flame‐retardant flexible polyurethane for textile coating: Preparation and characterisation

et al. 2019

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A type of flexible polyurethane (FPU) based on renewable-sourced polyol was prepared and then modified with halogen-free flame retardants, namely, alumina trihydrate (ATH) and triphenyl phosphate (TPhP), to further increase its flameresistant properties. The optimum loading for additives was determined based on analysing the changes in physicomechanical properties, thermal properties, and flame-retardant behaviours of modified FPU materials. An FPU-coated textile was then prepared; its smoke-generating behaviours and flammability were investigated in comparison with pristine fabric, pristine FPU, and respective modified FPU. The results confirmed good synergistic effect between ATH and TPhP, which helped increasing flame-resistant properties of applied materials, while also maintained reasonable flexibility for fabric-coating applications. However, the usage of modified FPU as coating material also proved to cause more toxic smoke emissions during the short burning duration of coated-fabric, an issue that needed to be investigated more thoroughly in order to guarantee the safety of people during catastrophic events.

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Linear polyamidoamines as novel biocompatible phosphorus-free surface-confined intumescent flame retardants for cotton fabrics

Cited by 56 publications

References 34 publications

A new catechol-functionalized polyamidoamine as an effective SPION stabilizer

A new catechol-functionalized polyamidoamine as an effective SPION stabilizer

pH-Dependent Chiral Recognition of D- and L-Arginine Derived Polyamidoamino Acids by Self-Assembled Sodium Deoxycholate

Halogen‐free flame‐retardant flexible polyurethane for textile coating: Preparation and characterisation

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