The appraisal of mechanical properties and friction coefficient of PVA hydro-gel / 生物医学工程学杂志
Journal of Biomedical Engineering
;
(6): 1021-1024, 2009.
Artigo
em Chinês
| WPRIM
| ID: wpr-244700
ABSTRACT
Gelatin and hydroxyapatite were introduced to polyvinyl alcohol (PVA) hydrogel with an attempt to enhance the performances of PVA hydrogel. Through a reiterative freezing-thawing methods, three kinds of PVA composite hydrogels were prepared. The mechanical performances of these composite hydrogels with the same PVA and HA content but varying gelatin content, such as tensile strength, elasticity modulus, creep curve, relaxation curve and friction coefficient were evaluated by using a computer-controlled universal electronic mechanical testing machine and a UMT-II frictional testing machine. The additional effects of hydroxylapatite and varying gelatin on the performances of composite PVA hydro-gels were analyzed. It was found that the gelatin content directly influenced the physical performances of PVA composite hydrogels; but no linear relationship was recorded. PVA composite hydrogel containing 2wt-% gelatin gave optimal results, i.e. tensile strength of 5.5MPa, compressive elastical modulus of 1.48MPa, creeping rate of 31% in 45 minutes, stress relaxing rate of 40.3%, and the starting friction coefficient of 0.332.
Texto completo:
DisponíveL
Índice:
WPRIM (Pacífico Ocidental)
Assunto principal:
Álcool de Polivinil
/
Resistência à Tração
/
Química
/
Fricção
/
Hidrogéis
/
Fenômenos Mecânicos
/
Módulo de Elasticidade
Idioma:
Chinês
Revista:
Journal of Biomedical Engineering
Ano de publicação:
2009
Tipo de documento:
Artigo
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