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Sustainability Perspectives When Crop Use Is Implemented in Different Sectors:A Life Cycle Assessment Approach

Journal of Shanghai Jiaotong university(Science) 2012年第3期17卷 334-336页

作者： DE BENEDETTI Bruno tecchio paolo ROLLINO Sara FOSCHIA Marina PIGNATELLI Sonia Politecnico di Torino Corso Duca degli Abruzzi24-10129 TorinoItaly

The present study aims to provide a preliminary overview of the sustainability concept when biomasses conceived for food goals become the raw materials upon which different sectors,such as plastic or energy industry,can develop innovative strategies,according to a so called "greener" *** the results hereafter presented,the definition of sustainability perspectives,according to the use of a life cycle assessment(LCA) approach,will be described for maize use as raw material in different *** current biopolymer industry and conventional biofuel technologies,the so called first-generation biofuels,are the more and more in competition with the food *** presented environmental evaluation,in terms of air emissions,energy and water consumption,is useful in order to understand the sustainability of a bio-sourced product,in comparison with the equivalent item produced by fossil fuels.

关键词： biomass maize biopolymer life cycle assessment bio-sourced materials sustainability

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Hollow micro- and nano-particles by gas foaming

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Nano Research 2014年第7期7卷 1018-1026页

作者： Silvia Orsi Ernesto Di Maio Salvatore lannace paolo A. Netti Center for Advanced Biomaterials for Health Care Istituto Italiano di Tecnologia (IIT@CRIB) Largo Barsanti e Matteucci 50 Napoli 80125 Italy Dipartimento di Ingegneria Chimica dei Materiali e della Produzione Industfiale and Interdisciplinary Research Centre on Biomaterials (CRIB) Universita degli Studi di Napoli Federico II P.le Tecchio 80 Napoli 80125 Italy Institute for Polymers Composites and Biomaterials Consiglio Nazionale delle Ricerche P.le E. Fermi 1 Portici (Na) 80055 Italy

This paper presents the results of a first successful attempt to produce hollow micro- and nano-particles of a large variety of materials, dimensions, shapes and hollow attributes by using an environmentally friendly and cheap technology, common in polymer processing and known as gas foaming. The central role played by ad hoc polymeric hollow micro- and nano-particles in a variety of emerging applications such as drug delivery, medical imaging, advanced materials, as well as in fundamental studies in nanotechnology highlights the wide relevance of the proposed method. Our key contribution to overcome the physical lower bound in the micro- and nano-scale gas foaming was to embed, prior to foaming, bulk micro- and nano-particles in a removable and deformable barrier film, whose role is to prevent the loss of the blowing agent, which is otherwise too fast to allow bubble formation. Furthermore, the barrier film allows for non-isotropic deformation of the particle and/or of the hollow, affording non-spherical hollow particles. In comparison with available methods to produce hollow micro- and nano-particles, our method is versatile since it offers independent control over the dimensions, material and shape of the particles, and the number, shape and open/closed features of the hollows. We have gas- foamed polystyrene and poly-（lactic-co-glycolic） acid particles 200 ~m to 200 nm in size, spherical, ellipsoidal and discoidal in shape, obtaining open or closed, single or multiple, variable in size hollows.

关键词： hollow nanoparticles microparticles gas foaming

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