Autiello, Maria Assunta (2015) Manipulation of dermis based collagen networks with engineered mechanical behaviour for applications in the tanning sector. [Tesi di dottorato]

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Item Type: Tesi di dottorato
Resource language: English
Title: Manipulation of dermis based collagen networks with engineered mechanical behaviour for applications in the tanning sector
Creators:
CreatorsEmail
Autiello, Maria Assuntamariaassunta.autiello@unina.it
Date: 31 March 2015
Number of Pages: 126
Institution: Università degli Studi di Napoli Federico II
Department: Ingegneria Chimica, dei Materiali e della Produzione Industriale
Scuola di dottorato: Ingegneria industriale
Dottorato: Ingegneria dei materiali e delle strutture
Ciclo di dottorato: 27
Coordinatore del Corso di dottorato:
nomeemail
Mensitieri, Giuseppemensitie@unina.it
Tutor:
nomeemail
Netti, Paolo AntonioUNSPECIFIED
Ventre, MaurizioUNSPECIFIED
Date: 31 March 2015
Number of Pages: 126
Keywords: Collagen, mechanical properties, tanning sector
Settori scientifico-disciplinari del MIUR: Area 09 - Ingegneria industriale e dell'informazione > ING-IND/22 - Scienza e tecnologia dei materiali
Aree tematiche (7° programma Quadro): NANOSCIENZE, NANOTECNOLOGIE, MATERIALE E PRODUZIONE > Materiali
Date Deposited: 12 Apr 2015 02:03
Last Modified: 29 Dec 2015 02:00
URI: http://www.fedoa.unina.it/id/eprint/10503
DOI: 10.6092/UNINA/FEDOA/10503

Collection description

In this thesis, technologies and processes of the biomaterial field, were implemented in the tanning sector, in order to obtain leather prototypes having engineered mechanical properties such as tear resistance and elastic recovery. The work is basically divided in two parts. First, the characterization of conventional leather material is reported and it is aimed at defining the benchmarks to which the chemical physical parameters of the engineered products need to be compared. The obtained results provided information on the structure-composition-functions relationship of animal skin and most importantly they provided clear hints on how to modify the substrate and in what step of the tanning process this is most convenient. Second, the identification of materials and the chemical–physical strategies is disclosed. Materials and processes were studied in order to most effectively affect the macroscopic properties of the final product. Then, the chemical-physical characterization of the obtained engineered samples is reported. Finally, tanning process was performed in order to realize engineered prototypes. Two manipulation strategies were implemented: crosslink and reinforcement. Crosslink involved the use of high temperature while reinforcement was carried out selecting polymeric materials to be delivered within dermis. In particular, polydimethylsiloxane and nylon were selected in order to increase tear resistance while elastomeric materials were selected in order to improve elastic recovery. Good prototypes were obtained using PDMS and Elastollan as elastomeric polymer. In particular increase of tear resistance were higher of 30% and improvement in the elastic recovery was found obtaining a decrease of 20% for the permanent strain values.

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