scholarly journals The effect of natural fibre reinforcement on polyurethane composite foams – A review

2021 ◽  
Vol 11 ◽  
pp. e00722
Author(s):  
Charles Kuranchie ◽  
Abu Yaya ◽  
Yaw Delali Bensah
Keyword(s):  
Natural Fibre ◽  
Fibre Reinforcement ◽  
Polyurethane Composite ◽  
Composite Foams

scholarly journals Polyurethane Composite Foams Synthesized Using Bio-Polyols and Cellulose Filler

Materials ◽  
2021 ◽  
Vol 14 (13) ◽  
pp. 3474
Author(s):  
Katarzyna Uram ◽  
Milena Leszczyńska ◽  
Aleksander Prociak ◽  
Anna Czajka ◽  
Michał Gloc ◽  
...  
Keyword(s):  
Cross Sections ◽  
Raw Materials ◽  
Polyurethane Foams ◽  
Degree Of Crystallinity ◽  
X Ray Diffraction ◽  
Polyurethane Composite ◽  
Composite Foams ◽  
Closed Cell ◽  
Ft Ir ◽  
The Fourier Transform

Rigid polyurethane foams were obtained using two types of renewable raw materials: bio-polyols and a cellulose filler (ARBOCEL® P 4000 X, JRS Rettenmaier, Rosenberg, Germany). A polyurethane system containing 40 wt.% of rapeseed oil-based polyols was modified with the cellulose filler in amounts of 1, 2, and 3 php (per hundred polyols). The cellulose was incorporated into the polyol premix as filler dispersion in a petrochemical polyol made using calenders. The cellulose filler was examined in terms of the degree of crystallinity using the powder X-ray diffraction PXRD -and the presence of bonds by means of the fourier transform infrared spectroscopy FT-IR. It was found that the addition of the cellulose filler increased the number of cells in the foams in both cross-sections—parallel and perpendicular to the direction of the foam growth—while reducing the sizes of those cells. Additionally, the foams had closed cell contents of more than 90% and initial thermal conductivity coefficients of 24.8 mW/m∙K. The insulation materials were dimensionally stable, especially at temperatures close to 0 °C, which qualifies them for use as insulation at low temperatures.

Improvement of thermal conductivity of rigid polyurethane foams with aluminum nitride filler

2021 ◽  
pp. 026248932198897
Author(s):  
Serife Akkoyun ◽  
Meral Akkoyun
Keyword(s):  
Thermal Conductivity ◽  
Aluminum Nitride ◽  
Polyurethane Foams ◽  
Thermal Transitions ◽  
Rigid Polyurethane Foams ◽  
Noticeable Increase ◽  
Polyurethane Composite ◽  
Composite Foams ◽  
Step Procedure ◽  
Electrical Conductivities

The aim of this work is the fabrication of electrically insulating composite rigid polyurethane foams with improved thermal conductivity. Therefore, this study is focused on the effect of aluminum nitride (AlN) on the thermal and electrical conductivities of rigid polyurethane foams. For this purpose, aluminum nitride/rigid polyurethane composite foams were prepared using a three-step procedure. The electrical and thermal conductivities of the foams were characterized. The thermal transitions, mechanical properties and morphology of the foams were also examined. The results reveal that AlN induces an increase of the thermal conductivity of rigid polyurethane foam of 24% which seems to be a relatively noticeable increase in polymeric foams. The low electrical conductivity of the foams is preserved.

Effect of fiber surface treatment on the structure and properties of rigid bagasse fibers/polyurethane composite foams

2021 ◽  
Author(s):  
Qunlei Qiu ◽  
Xin Yang ◽  
Penghao Zhang ◽  
Danyu Wang ◽  
Miao Lu ◽  
...  
Keyword(s):  
Surface Treatment ◽  
Fiber Surface ◽  
Structure And Properties ◽  
Polyurethane Composite ◽  
Composite Foams ◽  
Fiber Surface Treatment

scholarly journals Effects of water absorption on the mechanical properties of hybrid natural fibre/phenol formaldehyde composites

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Sekar Sanjeevi ◽  
Vigneshwaran Shanmugam ◽  
Suresh Kumar ◽  
Velmurugan Ganesan ◽  
Gabriel Sas ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Impact Strength ◽  
Water Absorption ◽  
Hybrid Composites ◽  
Phenol Formaldehyde ◽  
Natural Fibre ◽  
The Other ◽  
Fibre Reinforcement ◽  
Dry Conditions

AbstractThis investigation is carried out to understand the effects of water absorption on the mechanical properties of hybrid phenol formaldehyde (PF) composite fabricated with Areca Fine Fibres (AFFs) and Calotropis Gigantea Fibre (CGF). Hybrid CGF/AFF/PF composites were manufactured using the hand layup technique at varying weight percentages of fibre reinforcement (25, 35 and 45%). Hybrid composite having 35 wt.% showed better mechanical properties (tensile strength ca. 59 MPa, flexural strength ca. 73 MPa and impact strength 1.43 kJ/m2) under wet and dry conditions as compared to the other hybrid composites. In general, the inclusion of the fibres enhanced the mechanical properties of neat PF. Increase in the fibre content increased the water absorption, however, after 120 h of immersion, all the composites attained an equilibrium state.

Reduced graphene oxide coated polyurethane composite foams as flexible strain sensors for large deformation

2021 ◽  
Vol 272 ◽  
pp. 115360
Author(s):  
Zhe Shi ◽  
An Li ◽  
Cong Zhang ◽  
Yang-Fei Zhang
Keyword(s):  
Graphene Oxide ◽  
Large Deformation ◽  
Reduced Graphene Oxide ◽  
Strain Sensors ◽  
Polyurethane Composite ◽  
Composite Foams ◽  
Reduced Graphene

Tensile Properties of Natural Fibre Reinforced Polymer Composite Foams: A Systematic Review

2021 ◽  
Vol 02 (01) ◽  
Author(s):  
NurFadhlin Sakina Jamil ◽  
◽  
Mazatusziha Ahmad ◽  
Ahmad Hakiim Jamaluddin ◽  
◽  
...  
Keyword(s):  
Systematic Review ◽  
Tensile Properties ◽  
Polymer Composite ◽  
Natural Fibre ◽  
Fibre Content ◽  
Composite Foam ◽  
Fibre Size ◽  
Reinforced Polymer ◽  
Composite Foams ◽  
Fibre Reinforced Polymer

Biodegradable foam packaging was chosen as an alternative food packaging material due to non-toxic and produced from renewable sources. Researchers has turned to incorporate natural fibre to enhance the mechanical properties of polymer composite foam. In this study, the objective is to identify the studies which investigated on the tensile properties of natural fiber incorporated polymer composite foam and analyzed the effect of natural fibre content and size on tensile properties. Further correlation between the natural fibre content and size on tensile properties of composite polymer foam was conducted. The studies on the natural fibre incorporated polymer composite was identify via PRISMA method. The effect of natural fibre content and natural fibre size on tensile properties of polymer composite foam were analyzed in terms of qualitative analysis via systematic review. This study employs systematic review method on the existing literature. This study has utilized supplementary databases such as SAGE Journals, ScienceDirect, Taylor & Francis, Emerald Insight, ERIC ProQuest, SpringerLink and IEEE Xplore to cater all the possible relevant literature for a comprehensive review. The systematic review method comprised of the steps that explain on the review process in the sequence of the (identification, screening, eligibility), data analysis and data abstraction. From the article used in this systematic review, most of the result shown the increased tensile properties on natural fibre reinforced polymer composite foams. The study by Texteira et al. (2014) shows that the softwood fibre with 33% of PLA loading has the highest elongation at break, and highest natural fibre size (2470 µm). While the study by Long et al. (2019) has the highest tensile strength with 30% of ABF fibre content. The composition of 20 wt% BF with 80 wt% PLA composites were concluded to have the optimum tensile properties

Nutmeg filler as a natural compound for the production of polyurethane composite foams with antibacterial and anti-aging properties

2020 ◽  
Vol 86 ◽  
pp. 106479 ◽  
Author(s):  
Sylwia Członka ◽  
Anna Strąkowska ◽  
Agnė Kairytė ◽  
Arūnas Kremensas
Keyword(s):  
Natural Compound ◽  
Polyurethane Composite ◽  
Composite Foams ◽  
Aging Properties

scholarly journals A versatile strategy for alternately arranging the foam ratio layers of multilayer graphene/thermoplastic polyurethane composite foams towards lightweight and broadband electromagnetic wave absorption

RSC Advances ◽  
2019 ◽  
Vol 9 (41) ◽  
pp. 23843-23855 ◽  
Author(s):  
Chaozhi Wang ◽  
Jiang Li ◽  
Shaoyun Guo
Keyword(s):  
Electromagnetic Wave ◽  
Thermoplastic Polyurethane ◽  
Impedance Matching ◽  
Multilayer Graphene ◽  
Absorption Bandwidth ◽  
Electromagnetic Wave Absorption ◽  
Polyurethane Composite ◽  
Composite Foams ◽  
Absorbing Material ◽  
Minimum Reflection Loss

A broadband electromagnetic wave (EW) absorbing material should possess both wider effective absorption bandwidth and lower minimum reflection loss, depending on good impedance matching between the absorber and air and strong attenuation of EW.

Effect of natural fibre reinforcement on the sound and vibration damping properties of bio-composites compression moulded by nonwoven mats

2019 ◽  
Vol 13 ◽  
pp. 12-17 ◽  
Author(s):  
Jin Zhang ◽  
Akbar Afaghi Khatibi ◽  
Erwan Castanet ◽  
Thomas Baum ◽  
Zahra Komeily-Nia ◽  
...  
Keyword(s):  
Natural Fibre ◽  
Vibration Damping ◽  
Fibre Reinforcement ◽  
Damping Properties ◽  
Nonwoven Mats
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