scholarly journals Characterization of Polypropylene Green Composites Reinforced by Cellulose Fibers Extracted from Rice Straw

2018 ◽  
Vol 2018 ◽  
pp. 1-10 ◽  
Author(s):  
Ngo Dinh Vu ◽  
Hang Thi Tran ◽  
Toan Duy Nguyen
Keyword(s):  
Mechanical Properties ◽  
Rice Straw ◽  
Cellulose Fibers ◽  
Flexural Properties ◽  
Alkaline Extraction ◽  
Green Composites ◽  
Green Composite ◽  
Thermal Mechanical Properties ◽  
Properties Of Composites

Polypropylene (PP) based green composites containing 10, 20, 30, 40 and 50 wt% of cellulose fibers (CFs) which were extracted from rice straw were successfully prepared by melt blend method. The CFs washed with H2O2 after alkaline extraction showed lower water absorption than that not washed with H2O2. The thermal, mechanical, and biodegradation properties of composites were also investigated. The 10% weight loss temperature of the composites was decreased with the increasing CFs content, but all the composites showed over 300°C. Young’s modulus and flexural properties of PP were improved by blending PP with CFs. The pure PP showed no degradability, but the PP/CFs composites degraded from about 3 to 23 wt%, depending on CFs content after being buried in soil for 50 days. These PP/CFs composites with high thermal, mechanical properties and biodegradability may be useful as green composite materials for various environmental fields.

scholarly journals Mechanical, physical and tribological characterization of nano-cellulose fibers reinforced bio-epoxy composites: An attempt to fabricate and scale the ‘Green’ composite

2016 ◽  
Vol 147 ◽  
pp. 282-293 ◽  
Author(s):  
Bamdad Barari ◽  
Emad Omrani ◽  
Afsaneh Dorri Moghadam ◽  
Pradeep L. Menezes ◽  
Krishna M. Pillai ◽  
...  
Keyword(s):  
Cellulose Fibers ◽  
Epoxy Composites ◽  
Green Composite ◽  
Nano Cellulose ◽  
Tribological Characterization

Processing Technologies for Green Composites Production

2016 ◽  
pp. 24-47
Author(s):  
Deepak Verma ◽  
Garvit Joshi ◽  
Rajneesh Dabral
Keyword(s):  
Low Cost ◽  
Green Composites ◽  
Green Composite ◽  
Processing Technologies ◽  
High Mechanical Strength ◽  
Transfer Molding ◽  
Molding Method ◽  
Properties And Characterization ◽  
New Material

Green composites became a most important and adaptable theme of research. This area/theme not only harness the agricultural wastes such as bagasse fibres, banana fibres, etc. but also provides a new material manufactured from these wastes which are reduced weight, have low cost, and have high mechanical strength. Currently, there are various methods available for the processing or fabrication of green composites. Some of these methods are hand layup method, injection molding method, spray-up method, compression molding, Resin-Transfer Molding (RTM), etc. In this chapter, we are discussing about the fabrication method of green composite and their important parameters. Various properties and characterization of composite materials made by these methods have also been discussed and reported here.

Study on the Application of Silane Coupling Agent in Rice Straw/Poly(butylene Succinate) Composites

2011 ◽  
Vol 675-677 ◽  
pp. 361-364 ◽  
Author(s):  
Yang Zhao ◽  
Jian Hui Qiu ◽  
Hui Xia Feng ◽  
Guo Hong Zhang ◽  
Liang Shao
Keyword(s):  
Mechanical Properties ◽  
Particle Size ◽  
Rice Straw ◽  
Coupling Agent ◽  
Silane Coupling Agent ◽  
Fracture Strain ◽  
Molding Machine ◽  
Butylene Succinate ◽  
Silane Coupling ◽  
Properties Of Composites

Rice straw/Poly(butylene succinate)(PBS) composites were prepared by injection molding machine. The influence of content and particle size of rice straw on the mechanical properties of composites indicated that with the increase of rice straw content the tensile strength and fracture strain of the composites was decreased. With the same content of rice straw, the smaller particle size, the more obvious decreased. The influence of dosage of silane coupling agent(SCA) on the composites was studied, the result indicated that with the increase of SCA content, the interface of composite materials significantly improved, the Young’s modulus increased 362% after rice straw was treated by SCA. Thermal analysis showed that the adding of coupling agent didn’t undermine the thermodynamic stability of the composites.

Attainment and Characterization of the Thermosetting Polymer Loaded with Barite to be Used in the Manufacture of Isolating Plates to Bar the X-Ray Radiation

2006 ◽  
Vol 45 ◽  
pp. 1429-1434
Author(s):  
Leila Figueiredo de Miranda ◽  
Antônio Hortêncio Munhoz Jr. ◽  
Terezinha Jocelen Masson ◽  
Virgínia Carolina Naime ◽  
Gustavo Camargo Costa
Keyword(s):  
Mechanical Properties ◽  
Experimental Design ◽  
Apparent Density ◽  
Weight Ratio ◽  
Average Density ◽  
Radiological Protection ◽  
X Ray ◽  
Protection Area ◽  
Properties Of Composites

The properties of composites based on thermosetting polyester and barite for use in the radiological protection area have been investigated with the objective to study the effect of different variables in the attainment of composites. To verify the efficiency of the composites produced in relation to radiological protection, lead was adopted as reference. A factorial experimental design was carried out and the studied variables were: type of polyester resin (orthophthalic or isophthalic), coupling agent (titanate or organosilane) and the ratio of resin to accelerator, catalyst and barite. The variables analyzed were: efficiency for barring the X-radiation, apparent density and mechanical properties. The effect, obtained from the experimental design, due to ratio of resin to barite in the apparent density was 0.036. The average apparent density of the samples produced with barite/resin value equal 2.0 (weight ratio) was 2.16g/cm3, while the average density of the samples produced with the weight ratio of barite/resin equal 3.0 was 2.2g/cm3. It was observed same trend for the density to mechanical properties. It was observed that the samples attenuated X-ray radiation adequately up to 116 kV.

scholarly journals Effect of fiber sizing on Mechanical properties of carbon reinforced composites: A Review

2020 ◽  
Vol 1 (2) ◽  
Author(s):  
Mayank Agrawal
Keyword(s):  
Mechanical Properties ◽  
Carbon Fiber ◽  
Reinforced Composites ◽  
Strength And Stiffness ◽  
Properties Of Composites

Present study focuses on the carbon fiber sizing and their effect on overall mechanical properties of composites. Fiber sizing are one of the most important component in the manufacturing of composites. As the sizing are so much of importance in the manufacturing and development of composites which governs mechanical properties such as strength and stiffness. In this review some of the important articles are referred from the widely dispersed literature. This review covers the sizing effect, adhesion between fiber and matrix and characterization of composites

PHYSICAL DISPERSION OF NANOCARBONS IN COMPOSITES–A REVIEW

2017 ◽  
Vol 79 (5) ◽  
Author(s):  
Jamal M. A. Alsharef ◽  
Mohd Raihan Taha ◽  
Tanveer Ahmed Khan
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanomaterials ◽  
Key Factors ◽  
Physical Methods ◽  
Aspect Ratios ◽  
Chemical Agents ◽  
Different Types ◽  
Negative Effect ◽  
Properties Of Composites

Recently, nanocarbons (carbon nanofibers (CNFs) and carbon nanotubes (CNTs)) have been used efficiently in numerous research works to significantly enhance the mechanical properties of composites. With their amazing mechanical properties and exceptionally high aspect ratios, nanocarbons (NCs) are seen as one of the most beneficial nanomaterials for nano-reinforcement. The dispersion of NCs is one of the key factors that strongly influence the properties of nanocomposites. Several researches have been carried out with chemical agents to achieve a consistent dispersal of carbon nanomaterials in water, although, if the process is uncontrolled, it can shorten or damage the NCs or even dissolve them, and this can have a negative effect on the composites as well. Therefore, if NCs are to be used as reinforcement for composites, physical methods have to be employed to disperse the NCs before they can be mixed into the composites. This paper presents an overview of the different types of NCs, their different uses and the research conducted for the dispersion of NCs by chemical and physical methods. Furthermore, a summary is given of the measurement and characterization of the dispersibility of NCs.

Nanoparticle/Epoxy Nanocomposites: Impact, Flexural and Thermal Properties

2010 ◽  
Vol 150-151 ◽  
pp. 1417-1420 ◽  
Author(s):  
Lei Chen ◽  
Zhi Wei Xu ◽  
Jia Lu Li ◽  
Guang Wei Chen
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotubes ◽  
Thermal Properties ◽  
Flexural Properties ◽  
Nano Tio2 ◽  
Nano Sio2 ◽  
Weight Content ◽  
Thermal Mechanical Properties ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

Nanocomposites based on epoxy which were reinforced by different nanoparticles were fabricated. Five types of nanoparticles (corresponding to multi-walled carbon nanotubes (MWNTs), nano-Al2O3, nano-TiO2 and nano-SiO2) were chosen and the weight content of the nanoparticles was 2wt.%. Impact, flexural and thermal-mechanical properties of the nanocomposites were investigated. Compared with neat epoxy, impact strength of systems which were reinforced by MWNTs and nano-TiO2 was increased by 60%. Concerned with the flexural properties, there was also an increase of about 10%~50% with the addition of the some nanoparticles such as MWNTs, nano-TiO2 and nano-SiO2. The heat resistance of the EP was not decreased by adding nanoparticles and the thermal properties of the systems were even improved with the addition of MWNTs.

scholarly journals Recycling of spent coffee grounds for useful extracts and green composites

RSC Advances ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 2682-2692
Author(s):  
Yihao Leow ◽  
Pek Yin Michelle Yew ◽  
Pei Lin Chee ◽  
Xian Jun Loh ◽  
Dan Kai
Keyword(s):  
Mechanical Properties ◽  
Composite Material ◽  
Chemical Composition ◽  
Chemical Compounds ◽  
Green Composites ◽  
Spent Coffee Grounds ◽  
Coffee Grounds ◽  
Coffee Oil ◽  
Properties Of Composites

Spent coffee grounds are mostly discarded as waste. Here we recycle them for chemical compounds and as composite material fillers. Our study evaluated the chemical composition of coffee oil extracts and mechanical properties of composites formed.

Characterization of Mechanical and Thermal Properties of PP/Mineral Composites

2014 ◽  
Vol 1025-1026 ◽  
pp. 241-245 ◽  
Author(s):  
Ľudmila Dulebová ◽  
Emil Spišák ◽  
Branislav Duleba ◽  
František Greškovič ◽  
Tomasz Garbacz
Keyword(s):  
Mechanical Properties ◽  
Thermal Analysis ◽  
Mechanical And Thermal Properties ◽  
Screw Extruder ◽  
Twin Screw ◽  
Pp Composites ◽  
Mineral Fillers ◽  
The Impact ◽  
Properties Of Composites

The paper presents the impact of the use of fillers on the mechanical properties of composites with polymeric matrix from polypropylene (PP). Two main types of mineral fillers - talc and calcium carbonate - were used for experiments. PP composites of different percentage filler in matrix PP were compounded with twin-screw extruder and then injection molding. Properties of composites were investigated by tensile test and thermal analysis. Tensile strength was performed to determine and compare the mechanical properties of the unfilled PP and filled PP with various percentages of fillers. Thermal analysis by thermogravimetric was performed on the tested materials - weight loss, glass transition temperature, thermal decomposition, melting temperature.

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