Titanosilsesquioxanes Embedded in Synthetic Clay as a Hybrid Material for Polymer Science

Carniato, Fabio; Bisio, Chiara; Gatti, Giorgio; Boccaleri, Enrico; Bertinetti, Luca; Coluccia, Salvatore; Monticelli, Orietta; Marchese, Leonardo

doi:10.1002/anie.200901927

Cited by 48 publications

(26 citation statements)

References 26 publications

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“…Three different synthetic saponite samples containing Nb(V) centers in the framework, hereafter named Nb‐SAP20(Et), Nb‐SAP110(Et) and Nb‐SAP20(Cl), were prepared, characterized and compared in this work. The conventional synthetic protocol, previously used to prepare saponite clays, was modified to allow the insertion of Nb(V) ions within the framework, aiming to obtain three novel solids with different characteristics in terms of oxidizing and Brønsted acid properties. The three Nb‐containing clays were prepared following a typical one‐pot hydrothermal procedure .…”

Section: Resultsmentioning

confidence: 99%

Physico-chemical Properties, Biological and Environmental Impact of Nb-saponites Catalysts for the Oxidative Degradation of Chemical Warfare Agents

et al. 2017

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Niobium‐containing saponite clays are active catalysts, under mild ambient conditions and in the presence of aqueous hydrogen peroxide, in the oxidative abatement of sulfur‐containing blister chemical warfare agent simulants, such as (2‐chloroethyl)ethyl sulfide. Over a Nb‐saponite solid, a complete, selective and safe abatement of the chemical agent was attained within 8 h. The biological and environmental impact of the Nb‐containing nanostructured clays used as decontamination solids was assessed by specific rapid biotoxicity tests on bioluminescent bacteria and vegetable plants. No negative impact on the strain of luminescent bacteria was evidenced in terms of acute and chronic toxicity. No adverse effects have been observed on vegetable plants in terms of germination, vigour and induction of chlorophyll fluorescence either.

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Section: Resultsmentioning

confidence: 99%

Physico-chemical Properties, Biological and Environmental Impact of Nb-saponites Catalysts for the Oxidative Degradation of Chemical Warfare Agents

et al. 2017

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“…Polyhedral oligomeric silsesquioxanes (POSS) are ideal nanobuilding blocks for the synthesis of organic-inorganic hybrid materials [1][2][3]. Indeed, incorporation of POSS into polymer matrices results in improvement of properties, such as mechanical properties [4], thermal stability [5][6][7], flammability [8], gas permeability, and dielectric permittivity [9].…”

Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of Novel Electrospinnable PBT/POSS Hybrid Systems Starting from c‐PBT

Gardella

Fina

Monticelli

2015

Journal of Nanomaterials

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Novel hybrid systems based on poly(butyleneterephthalate) (PBT) and polyhedral oligomeric silsesquioxanes (POSS) have been prepared by applying the ring-opening polymerization of cyclic poly(butyleneterephthalate) oligomers. Two types of POSS have been used: one characterized by hydroxyl functionalities (named POSS-OH) and another without specific reactive groups (named oib-POSS). It was demonstrated that POSS-OH acts as an initiator for the polymerization reaction, leading to the direct insertion of the silsesquioxane into the polymer backbone. Among the possible applications of the PBT/POSS hybrid system, the possibility to obtain nanofibers has been assessed in this work.

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“…POSS bridges the gap between fillers and monomers in modifying macromolecules mobility and thus the reinforcement of polymer materials. Indeed, POSS are organic/inorganic molecules, with a size of approximately 1 to 3 nm, with a general formula of (RSiO 1,5 )n where R is hydrogen or an organic group, such as alkyl, aryl or any of their derivatives [2,3]. The size of the pendant POSS cage is comparable to the dimensions of the linear polymer, enabling POSS to control the motions of the chains at the molecular level with enhanced benefits while retaining the processability and mechanical properties of the pristine polymer [1].…”

Section: Introductionmentioning

confidence: 99%

“…The size of the pendant POSS cage is comparable to the dimensions of the linear polymer, enabling POSS to control the motions of the chains at the molecular level with enhanced benefits while retaining the processability and mechanical properties of the pristine polymer [1]. From a general point of view, the incorporation of the thermally robust POSS moiety into organic polymers was found to modify drastically the thermal properties of the polymer supplying improved thermal stability to the polymer matrix [4,5], also allowing the tailoring of the polymer glass transition temperature by tuning the POSS concentration [6]. Moreover, incorporation of POSS molecules is responsible for modifications of the mechanical properties [7,8] as well as reduction in both flammability and rate of heat release during combustion [9].…”

Section: Introductionmentioning

confidence: 99%

On a novel method to synthesize POSS-based hybrids: An example of the preparation of TPU based system

Monticelli

Fina²,

Cavallo³

et al. 2013

Express Polym. Lett.

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Abstract.A novel method to prepare polymer/polyhedral oligomeric silsesquioxanes (POSS) hybrids by melt reactive blending is proposed in this paper, by the controlled polymer chain scission and reaction of chain ends with functional silsesquioxanes. Application to thermoplastic polyurethanes (TPU) is addressed, taking advantage of the polyurethane chain scission equilibrium reaction, leading to the formation of highly reactive isocyanate and hydroxyl chain ends. Despite the isocyanate chemistry has been widely studied for the preparation of polymer/POSS hybrids by in situ copolymerisation, the exploitation of similar chemical processes in an industrially viable and environmental friendly melt blending process is currently an open research field. In this work, the reaction in the molten state of dihydroxyl-functionalised POSS with the polyurethane chain is demonstrated to produce a TPU/POSS hybrids. The effect of POSS concentration on nanomorphology, thermal properties and surface properties is studied, showing significant changes compared to pristine TPU. In particular, an increase of glass transition temperature is observed in the presence of reactive POSS (!T up to about 10°C in the presence of 10 wt% loading). Furthermore, an increase of surface water wettability, evidenced by the decrease of water contact angle from 95° for pristine TPU to 70° in TPU containing 10"wt% of reactive POSS, is found.

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Titanosilsesquioxanes Embedded in Synthetic Clay as a Hybrid Material for Polymer Science

Cited by 48 publications

References 26 publications

Physico-chemical Properties, Biological and Environmental Impact of Nb-saponites Catalysts for the Oxidative Degradation of Chemical Warfare Agents

Physico-chemical Properties, Biological and Environmental Impact of Nb-saponites Catalysts for the Oxidative Degradation of Chemical Warfare Agents

Preparation and Characterization of Novel Electrospinnable PBT/POSS Hybrid Systems Starting from c‐PBT

On a novel method to synthesize POSS-based hybrids: An example of the preparation of TPU based system

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