Effects of polysiloxanes with different molecular weights on in vitro cytotoxicity and properties of polyurethane/cotton–cellulose nanofiber nanocomposite films

A series of polyurethane/cotton–cellulose nanofiber nanocomposite films are manufactured using amino-terminated polydimethylsiloxane (H 2 N-PDMS-NH 2 ), polycarbonate diol (PCDL), isophorone diisocyanate (IPDI), and dispersed cotton–cellulose nanofibers (c-CNF). The heat resistance, hydrophobicity,...

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Bibliographic Details
Published in:Polymer chemistry 2020-08, Vol.11 (32), p.5225-5237
Main Authors: Xu, Chang-An, Nan, Bingfei, Lu, Mangeng, Qu, Zhencai, Tan, Zhiyou, Wu, Kun, Shi, Jun
Format: Article
Language:English
Subjects:
Biocompatibility
Cellulose
Cotton
Diisocyanates
Erythrocytes
Free energy
Heat resistance
Hydrophobicity
Mechanical properties
Molecular weight
Morphology
Nanocomposites
Nanofibers
Polydimethylsiloxane
Polymer chemistry
Polysiloxanes
Polyurethane resins
Surface energy
Thermal resistance
Toxicity
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Summary:A series of polyurethane/cotton–cellulose nanofiber nanocomposite films are manufactured using amino-terminated polydimethylsiloxane (H 2 N-PDMS-NH 2 ), polycarbonate diol (PCDL), isophorone diisocyanate (IPDI), and dispersed cotton–cellulose nanofibers (c-CNF). The heat resistance, hydrophobicity, mechanical properties, surface morphology and effect on cells of the film are studied. The results show that as the molecular weight of H 2 N-PDMS-NH 2 increases, the heat resistance and hydrophobicity of the material improve, and when the molecular weight is 4000, its surface free energy reaches 14.9 mJ m −2 . This is mainly because an increase in the molecular weight of H 2 N-PDMS-NH 2 changes the chemical structure of the polymer and increases the possibility of low surface energy Si enrichment on the surface. In addition, the cell viability reaches 78.31% in the MTT experiment, which may be related to the biocompatibility of H 2 N-PDMS-NH 2 . The relative hemolysis rate of the polymer material to red blood cells is less than 2%, and also shows lower adhesion to platelet cells, which may be related to the hydrophobicity of the surface.
ISSN:1759-9954
1759-9962
DOI:10.1039/D0PY00809E