Materials Map

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The Materials Map is an open tool for improving networking and interdisciplinary exchange within materials research. It enables cross-database search for cooperation and network partners and discovering of the research landscape.

The dashboard provides detailed information about the selected scientist, e.g. publications. The dashboard can be filtered and shows the relationship to co-authors in different diagrams. In addition, a link is provided to find contact information.

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The Materials Map is still under development. In its current state, it is only based on one single data source and, thus, incomplete and contains duplicates. We are working on incorporating new open data sources like ORCID to improve the quality and the timeliness of our data. We will update Materials Map as soon as possible and kindly ask for your patience.

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Naji, M.
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in Cooperation with on an Cooperation-Score of 37%

Topics

Publications (55/55 displayed)

  • 2010Thermomechanical processing environment and morphology development of a thermotropic polymer liquid crystal3citations
  • 2010Effect of surface treatment in cork reinforced composites49citations
  • 2010Residual stresses in gas-assisted injection molding.5citations
  • 2010Thermoresponsive self-assembled elastin-based nanoparticles for delivery of BMPs170citations
  • 2008Biodegradable composites applied to the automotive industry: the development of a loudspeaker frontcitations
  • 2006Influence of the interaction potential parameters on the mechanical response of simulated semi-crystalline polymeric materials2citations
  • 2006Fiber orientation in divergent/convergent fows in expansion and compression injection molding13citations
  • 2005Processing and characterization of biodegradable soy plastics: Effects of crosslinking with glyoxal and thermal treatment54citations
  • 2004Controlled delivery achieved with bi-layer matrix devices produced by co-injection moulding11citations
  • 2004Integrated compounding and injection moulding of short fibre reinforced composites3citations
  • 2004pH-sensitive soy protein films for the controlled release of an anti-inflammatory drugcitations
  • 2003Shear controlled orientation in injection moulding of starch based blends intended for medical applicationscitations
  • 2003In vitro degradation behaviour of biodegradable soy plastics : effects of crosslinking with glyoxal and thermal treatment59citations
  • 2003In vitro degradation behaviour of biodegradable soy plastics : effects of crosslinking with glyoxal and thermal treatment59citations
  • 2003Development and design of double-layer co-injection moulded soy protein based drug delivery devices37citations
  • 2003Bi-composite sandwich moldings: processing, mechanical performance and bioactive behaviour10citations
  • 2003Development and design of novel co-injection molded soy protein delivery devicescitations
  • 2003Structural development of HDPE in injection molding29citations
  • 2003Casein and soybean protein-based thermoplastics and composites as alternative biodegradable polymers for biomedical applicationscitations
  • 2003Soy matrix drug delivery systems obtained by melt-processing techniques47citations
  • 2003Coupling of HDPE/hydroxyapatite composites by silane-based methodologies38citations
  • 2003Plasma- and chemical-induced graft polymerization on the surface of starch-based biomaterials aimed at improving cell adhesion and proliferation21citations
  • 2003In vitro degradation and cytocompatibility evaluation of novel soy and sodium caseinate-based membrane biomaterials83citations
  • 2003Bi-composite sandwich moldings10citations
  • 2003Effect of crosslinking, thermal treatment and UV irradiation on the mechanical properties and in vitro degradation behavior of several natural proteins aimed to be used in the biomedical field53citations
  • 2003Processing and properties of bone-analogue biodegradable and bioinert polymeric composites60citations
  • 2003In vitro degradation behaviour of biodegradable soy plastics: effects of crosslinking with glyoxal and thermal treatment59citations
  • 2002Bi-composite sandwich injection moulding: A new method of producing stiff and strongly bioactive bone-analoguescitations
  • 2002Use of coupling agents to enhance the interfacial interactions in starch-EVOH/hydroxylapatite composites75citations
  • 2002Mechanical behaviour of polyethylene/hydroxyapatite bone-analogue composites moulded with an induced anisotropycitations
  • 2002Dynamic mechanical analysis in polymers for medical applicationscitations
  • 2002Novel starch thermoplastic/Bioglass® composites: Mechanical properties, degradation behavior and in-vitro bioactivity51citations
  • 2002Mechanical performance of starch based bioactive composite biomaterials molded with preferred orientation50citations
  • 2002Performance of chromium nitride and titanium nitride coatings during plastic injection moulding53citations
  • 2002Reinforcement and structure development in injection molding of bone-analogue compositescitations
  • 2002Design and processing of starch based scaffolds for hard tissue engineeringcitations
  • 2002Structure development and interfacial interactions in high-density polyethylene/hydroxyapatite (HDPE/HA) composites molded with preferred orientation28citations
  • 2002Alternative tissue engineering scaffolds based on starch: processing methodologies, morphology, degradation and mechanical properties212citations
  • 2001A new approach based on injection moulding to produce biodegradable starch-based polymeric scaffolds: morphology, mechanical and degradation behaviour344citations
  • 2001Biocompatibility testing of novel starch-based materials with potential application in orthopaedic surgery: a preliminary study188citations
  • 2001Cytocompatibility and response of osteoblastic-like cells to starch-based polymers: effect of several additives and processing conditions169citations
  • 2001Development of highly bioactive and mechanically strong starch thermoplastic/bioglass composite biomaterialscitations
  • 2001Structure and properties of hydroxylapatite reinforced starch bone-analogue compositescitations
  • 2001In-vitro degradation behaviour of starch/EVOH biomaterials20citations
  • 2001Viscoelastic behaviour and time-temperature correspondence of HDPE with varying levels of process-induced orientation57citations
  • 2001Degradation model of starch-EVOH+HA composites39citations
  • 2001Relationship between processing and mechanical properties of injection molded high molecular mass polyethylene + hydroxyapatite composites31citations
  • 2001Relationship between processing and mechanical properties of injection molded high molecular mass polyethylene plus hydroxyapatite composites31citations
  • 2000Chemical modification of starch based biodegradable polymeric blends: effects on water uptake, degradation behaviour and mechanical properties170citations
  • 2000Effects of moisture and degradation time over the mechanical dynamical performance of starch-based biomaterialscitations
  • 2000Performance of chromium nitride based coatings under plastic processing conditions38citations
  • 2000Development of highly bioactive and mechanically strong starch thermoplastic/Bioglass (R) composite biomaterialscitations
  • 2000Injection molding of a starch/EVOH blend aimed as an alternative biomaterial for temporary applicationscitations
  • 2000Prediction of mechanical properties of polyethylene mouldings based on laminate theory and thermomechanical indicescitations
  • 2000Structure and properties of hydroxylapatite reinforced starch bone-analogue compositescitations

Places of action

Chart of shared publication
Denchev, Z.
2 / 41 shared
Simões, Ricardo
2 / 14 shared
Viana, J. C.
3 / 73 shared
Oliveira, M. J.
3 / 9 shared
Mano, J. F.
7 / 428 shared
Brostow, Witold
1 / 7 shared
Baklouti, M.
1 / 1 shared
Ben Cheikh, R.
1 / 1 shared
Ben Abdallah, F.
1 / 1 shared
Meijer, H. E. H.
1 / 46 shared
Anderson, P. D.
1 / 4 shared
Custódio, F. J. M. F.
1 / 3 shared
Peters, G. W. M.
1 / 30 shared
Redl, H.
1 / 12 shared
Bessa, P. C.
1 / 11 shared
Rodríguez-Cabello, J. C.
1 / 3 shared
Nürnberger, S.
1 / 2 shared
Dopler, D.
1 / 2 shared
Reis, Rui Luís
39 / 1359 shared
Machado, R.
1 / 12 shared
Van Griensven, M.
1 / 15 shared
Banerjee, A.
1 / 15 shared
Casal, M.
1 / 18 shared
Mateos, A.
1 / 1 shared
Campos, A. R.
3 / 3 shared
Tielas, A.
1 / 1 shared
Dias, Gustavo R.
1 / 8 shared
Silva, Cristina A.
1 / 1 shared
Hattum, F. W. J. Van
1 / 20 shared
Vaz, C. M.
14 / 14 shared
Yilmaz, G.
1 / 3 shared
De Graaf, L. A.
6 / 7 shared
Van Doeveren, P. F. N. M.
4 / 4 shared
Dias, G. R.
1 / 1 shared
Sousa, R. A.
18 / 104 shared
Bevis, M. J.
16 / 16 shared
Altpeter, H.
1 / 1 shared
Gomes, M. E.
3 / 196 shared
Reis, R. L.
7 / 80 shared
Graaf, L. A. De
1 / 1 shared
Oliveira, A. L.
3 / 46 shared
Tchalamov, D.
3 / 3 shared
Bevis, M. T.
1 / 1 shared
Fossen, M.
1 / 2 shared
Van Tuil, R. F.
1 / 2 shared
Elvira, C.
2 / 12 shared
Yi, F.
1 / 1 shared
Azevedo, M. C.
1 / 2 shared
San Román, J.
1 / 10 shared
Rebouta, L.
1 / 55 shared
Coutinho, O. P.
1 / 27 shared
Silva, G. A.
1 / 19 shared
Oliveira, Ana L.
1 / 23 shared
Zhong, Z. P.
3 / 5 shared
Greenspan, D.
3 / 7 shared
Leonor, I. B.
3 / 83 shared
Andritschky, M.
2 / 5 shared
Miranda, A. S.
2 / 6 shared
Pischow, K.
2 / 9 shared
Cunha, L.
2 / 45 shared
Zarychta, A.
2 / 2 shared
Wang, Z.
2 / 99 shared
Gomes, Manuela E.
2 / 57 shared
Godinho, J. S.
3 / 3 shared
Malafaya, P. B.
1 / 55 shared
Ribeiro, A. S.
1 / 7 shared
Bovell, Y. P.
1 / 1 shared
Van Blitterswijk, C. A.
1 / 10 shared
De Bruijn, J. D.
2 / 3 shared
Mendes, S. C.
1 / 2 shared
Blitterswijk, C. A.
1 / 1 shared
Mota, M.
1 / 3 shared
Araújo, M. Alberta
1 / 1 shared
Vaz, Cláudia M.
1 / 1 shared
Piskin, E.
1 / 6 shared
Demirgoz, D.
1 / 1 shared
Kalay, G.
1 / 1 shared
Crawford, R. J.
1 / 5 shared
Chart of publication period
2010
2008
2006
2005
2004
2003
2002
2001
2000

Co-Authors (by relevance)

  • Denchev, Z.
  • Simões, Ricardo
  • Viana, J. C.
  • Oliveira, M. J.
  • Mano, J. F.
  • Brostow, Witold
  • Baklouti, M.
  • Ben Cheikh, R.
  • Ben Abdallah, F.
  • Meijer, H. E. H.
  • Anderson, P. D.
  • Custódio, F. J. M. F.
  • Peters, G. W. M.
  • Redl, H.
  • Bessa, P. C.
  • Rodríguez-Cabello, J. C.
  • Nürnberger, S.
  • Dopler, D.
  • Reis, Rui Luís
  • Machado, R.
  • Van Griensven, M.
  • Banerjee, A.
  • Casal, M.
  • Mateos, A.
  • Campos, A. R.
  • Tielas, A.
  • Dias, Gustavo R.
  • Silva, Cristina A.
  • Hattum, F. W. J. Van
  • Vaz, C. M.
  • Yilmaz, G.
  • De Graaf, L. A.
  • Van Doeveren, P. F. N. M.
  • Dias, G. R.
  • Sousa, R. A.
  • Bevis, M. J.
  • Altpeter, H.
  • Gomes, M. E.
  • Reis, R. L.
  • Graaf, L. A. De
  • Oliveira, A. L.
  • Tchalamov, D.
  • Bevis, M. T.
  • Fossen, M.
  • Van Tuil, R. F.
  • Elvira, C.
  • Yi, F.
  • Azevedo, M. C.
  • San Román, J.
  • Rebouta, L.
  • Coutinho, O. P.
  • Silva, G. A.
  • Oliveira, Ana L.
  • Zhong, Z. P.
  • Greenspan, D.
  • Leonor, I. B.
  • Andritschky, M.
  • Miranda, A. S.
  • Pischow, K.
  • Cunha, L.
  • Zarychta, A.
  • Wang, Z.
  • Gomes, Manuela E.
  • Godinho, J. S.
  • Malafaya, P. B.
  • Ribeiro, A. S.
  • Bovell, Y. P.
  • Van Blitterswijk, C. A.
  • De Bruijn, J. D.
  • Mendes, S. C.
  • Blitterswijk, C. A.
  • Mota, M.
  • Araújo, M. Alberta
  • Vaz, Cláudia M.
  • Piskin, E.
  • Demirgoz, D.
  • Kalay, G.
  • Crawford, R. J.
OrganizationsLocationPeople

article

Mechanical performance of starch based bioactive composite biomaterials molded with preferred orientation

  • Sousa, R. A.
  • Cunha, A. M.
  • Bevis, M. J.
  • Reis, Rui Luís
  • Mano, J. F.
Abstract

Composites of blends of starch with ethylene vinyl alcohol copolymer (SEVA-C) filled with 10, 30 and 50% by weight (wt.) of hydroxyapatite (HA–the major inorganic constituent of human bone) were produced by twin-screw extrusion (TSE) compounding. These composites were molded into tensile test bars using two molding techniques: i) conventional injection molding and ii) shear controlled orientation in injection molding (SCORIM). The bars produced were mechanically characterized by means of tensile testing and dynamical mechanical analysis (DMA). The structure of the moldings was assessed by wide-angle X-ray diffraction (WAXD) and the failure surfaces of the moldings analyzed by scanning electron microscopy (SEM). The enhancement of stiffness observed with HA reinforcement results partially from the stiffening effect of the blend associated with the decrease in plasticizer content during the compounding stage. SCORIM was able to further increase the stiffness of SEVA-C/HA composites, allowing a maximum improvement of 12% for 30% wt. HA as compared to conventional molding. DMA results showed that the reinforcement of SEVA-C causes the broadening of the relaxation peak of the polymer, suggesting a structural change within the starch fraction that may be related with thermal degradation of the polymer. The addition of HA particles reduces the preferred orientation exhibited by the SEVA-C matrix, which is believed to limit the maximum mechanical performance that can be attained. Nevertheless, composites based on a biodegradable matrix with modulus above 7 GPa (in the bounds of the lower limit for human cortical bone) could be successfully produced.

Topics
  • impedance spectroscopy
  • surface
  • scanning electron microscopy
  • extrusion
  • composite
  • injection molding
  • copolymer
  • biomaterials
  • alcohol
  • wide-angle X-ray diffraction