NDLI: Performance of biocomposites from surface modified regenerated cellulose fibers and lactic acid thermoset bioresin

Content Provider	Springer Nature Link
Author	Ramamoorthy, Sunil Kumar Bakare, Fatimat Herrmann, Rene Skrifvars, Mikael
Copyright Year	2015
Abstract	The effect of surface treatments, silane and alkali, on regenerated cellulose fibers was studied by using the treated fibers as reinforcement in lactic acid thermoset bioresin. The surface treatments were performed to improve the physico–chemical interactions at the fiber–matrix interface. Tensile, flexural and impact tests were used as indicator of the improvement of the interfacial strength. Furthermore, thermal conductivity, viscoelasticity measurements as well as microscopy images were made to characterize the fiber surface treatments and the effect on adhesion to the matrix. The results showed that silane treatment improved the mechanical properties of the composites as the silane molecule acts as link between the cellulose fiber and the resin (the fiber bonds with siloxane bridge while the resin bonds with organofunctional group of the bi-functional silane molecule) which gives molecular continuity in the interphase of the composite. Porosity volume decreased significantly on silane treatment due to improved interface and interlocking between fiber and matrix. Decrease in water absorption and increase in contact angle confirmed the change in the hydrophilicity of the composites. The storage modulus increased when the reinforcements were treated with silane whereas the damping intensity decreased for the same composites indicating a better adhesion between fiber and matrix on silane treatment. Thermogravimetric analysis indicated that the thermal stability of the reinforcement altered after treatments. The resin curing was followed using differential scanning calorimetry and the necessity for post-curing was recommended. Finite element analysis was used to predict the thermal behavior of the composites and a non-destructive resonance analysis was performed to ratify the modulus obtained from tensile testing. The changes were also seen on composites reinforced with alkali treated fiber. Microscopy images confirmed the good adhesion between the silane treated fibers and the resin at the interface.
Starting Page	2507
Ending Page	2528
Page Count	22
File Format	PDF
ISSN	09690239
Journal	Cellulose
Volume Number	22
Issue Number	4
e-ISSN	1572882X
Language	English
Publisher	Springer Netherlands
Publisher Date	2015-05-06
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Surface modification Cellulose fiber Mechanical properties Thermal conductivity Finite element analysis Resonance analysis Bioorganic Chemistry Physical Chemistry Organic Chemistry Polymer Sciences
Content Type	Text
Resource Type	Article
Subject	Polymers and Plastics

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