Preparation and Characterization of Cellulosic Fibre-Reinforced Polypropylene Foams

2010 ◽  
Vol 123-125 ◽  
pp. 1183-1186 ◽  
Author(s):  
Mònica Ardanuy ◽  
Marcelo Antunes ◽  
Jose Ignacio Velasco
Keyword(s):  
Batch Process ◽  
Barley Straw ◽  
Cellulosic Fibre ◽  
Compression Moulding ◽  
Cellulose Fibres ◽  
Foaming Agent ◽  
Composite Foams ◽  
Fibre Loading ◽  
Composite Samples

The preparation and characterization of cellulosic fibre-reinforced polypropylene composite foams is presented. The cellulose fibres were isolated from a barley straw obtained from local sources. They were compounded with the polymer in the melt state to obtain composites with nominal concentrations of 10 and 20% by weight. After compression-moulding the composite samples were foamed in a high-pressure batch-process employing CO2 as foaming agent. The effects of the fibre loading on the basics characteristics of the foams was investigated.

scholarly journals Mechanical Properties of Thermoplastics Corn Starch (TPCS) Reinforced Pineapple Leaf Fibre (PALF) Composite

2019 ◽  
Vol 8 (4) ◽  
pp. 8817-8821
Keyword(s):  
Corn Starch ◽  
Tensile Modulus ◽  
Impact Testing ◽  
Compression Moulding ◽  
Weight Percentage ◽  
Flexural Testing ◽  
The Impact ◽  
Fibre Loading ◽  
Selection Of

The aim of this study is to investigate the mechanical characterization of bio-composites on thermoplastic corn starch (TPCS) reinforced with 2 mm length of pineapple leaf fibre (PALF). The selection of different weight percentages of fibres (20, 30, 40, 50 and 60) weight percentage (wt.%) of PALF contents were applied in this study. The mixtures of TPCS with different wt.% of PALF were made by using a hot compression moulding at 165 °C for 15 minutes. The mechanical testing that has been performed are tensile, flexural and impact testing to determine the effect of fibre loading on bio-composites characteristics. The results show that by incorporating 40 wt.% loading of PALF, the tensile strength and tensile modulus has increased to the maximum. However, the flexural testing result shows that 50 wt.% loading of PALF show the highest strength and modulus. Meanwhile, the impact testing result shows decrement when the loadings of PALF increases. Scanning electron microscopy (SEM) show that the TPCS with 40 wt.% of PALF have a good miscibility between matrix/fibre in the bio-composites. Overall, the TPCS/PALF composites enhance the properties of the bio-composites for short-life application: that is, plate, container, disposable tray, packaging etc.

Processing and characterization of YBa2Cu3O7−x/Ag composites

1990 ◽  
Vol 48 (4) ◽  
pp. 46-47
Author(s):  
Jafar Javadpour ◽  
Bradley L. Thiel ◽  
Sarikaya Mehmet ◽  
Ilhan A. Aksay
Keyword(s):  
Composite System ◽  
Precursor Solution ◽  
Microstructural Development ◽  
Superconducting Properties ◽  
Practical Applications ◽  
Nitrate Precursor ◽  
Cold Pressed ◽  
Tape Cast ◽  
Composite Samples

Practical applications of bulk YBa2Cu3O7−x materials have been limited because of their inadequate critical current density (jc) and poor mechanical properties. Several recent reports have indicated that the addition of Ag to the YBa2Cu3O7−x system is beneficial in improving both mechanical and superconducting properties. However, detailed studies concerning the effect of Ag on the microstructural development of the cermet system have been lacking. Here, we present some observations on the microstructural evolution in the YBa2Cu3O7−x/Ag composite system.The composite samples were prepared by mixing various amounts (2.5 - 50 wt%) AgNO3 in the YBa2Cu3O7−x nitrate precursor solution. These solutions were then spray dried and the resulting powders were either cold pressed or tape cast. The microstructures of the sintered samples were analyzed using SEM (Philips 515) and an analytical TEM (Philips 430T).The SEM micrographs of the compacts with 2.5 and 50 wt% Ag addition sintered at 915°C (below the melting point of Ag) for 1 h in air are displayed in Figs. 1 and 2, respectively.

Synthesis and Characterization of Foamed Cassava Starch Material

2012 ◽  
Vol 262 ◽  
pp. 405-409
Author(s):  
Yang Liu ◽  
Shan Shan Li ◽  
Xin Yan Yang ◽  
Chong Xing Huang
Keyword(s):  
Reaction Time ◽  
Cassava Starch ◽  
Synthesis And Characterization ◽  
Compression Stress ◽  
Static Compression ◽  
Foaming Agent ◽  
New Type ◽  
Analysis System ◽  
Central Composite

A new-type foam composites were fabricated by baking method from a mixture of cassava starch. A central composite design was constructed using the software Statistics Analysis System 9.0 to evaluate the static compression stress of foamed material. The optimum dosages of adhesive, foaming agent, catalyst were 2.0g, 6.0g, 2.4g, respectively; reaction temperature 65°C; reaction time 16 hour.

Characterization of silane treated and untreated natural cellulosic fibre from corn stalk waste as potential reinforcement in polymer composites

2019 ◽  
Vol 218 ◽  
pp. 179-187 ◽  
Author(s):  
Yucheng Liu ◽  
Xueman Lv ◽  
Jianlun Bao ◽  
Jun Xie ◽  
Xu Tang ◽  
...  
Keyword(s):  
Polymer Composites ◽  
Corn Stalk ◽  
Cellulosic Fibre

scholarly journals Preparation and Physicochemical Characterization of Softgels Cross-Linked with Cactus Mucilage Extracted from Cladodes of Opuntia Ficus-Indica

Molecules ◽  
2019 ◽  
Vol 24 (14) ◽  
pp. 2531 ◽  
Author(s):  
Luis R. Camelo Caballero ◽  
Andrea Wilches-Torres ◽  
Agobardo Cárdenas-Chaparro ◽  
Jovanny A. Gómez Castaño ◽  
María Carolina Otálora
Keyword(s):  
Physicochemical Characterization ◽  
Wall Material ◽  
Scanning Calorimetry ◽  
Nutritional Properties ◽  
Solubility In Water ◽  
Prepared Composite ◽  
Cactus Mucilage ◽  
Composite Samples ◽  
Vibrational Characterization

A new crosslinking formulation using gelatin (G) and cactus mucilage (CM) biopolymers was developed, physicochemically characterized and proposed as an alternative wall material to traditional gelatin capsules (softgels). The effect of G concentration at different G/CM ratios (3:1, 1:1 and 1:3) was analyzed. Transparency, moisture content (MC), solubility in water (SW), morphology (scanning electron microscopy, SEM), vibrational characterization (Fourier transform infrared, FTIR), color parameters (CIELab) and thermal (differential scanning calorimetry/thermogravimetric analysis, DSC/TGA) properties of the prepared composite (CMC) capsules were estimated and compared with control (CC) capsules containing only G and glycerol. In addition, the dietary fiber (DF) content was also evaluated. Our results showed that the transparency of composite samples decreased gradually with the presence of CM, the G/CM ratio of 3:1 being suitable to form the softgels. The addition of CM decreased the MC, the SW and the lightness of the capsules. Furthermore, the presence of polysaccharide had significant effects on the morphology and thermal behavior of CMC in contrast to CC. FTIR spectra confirmed the CMC formation by crosslinking between CM and G biopolymers. The addition of CM to the softgels formulation influenced the DF content. Our findings support the feasibility of developing softgels using a formulation of CM and G as wall material with nutritional properties.

Thermal Characterization of Polyurethane from Castor Oil Reinforced Sugarcane Straw Composites

2011 ◽  
Vol 415-417 ◽  
pp. 1103-1106
Author(s):  
Patricia Câmara Miléo ◽  
George Jackson de Moraes Rocha ◽  
Adilson Roberto Gonçalves
Keyword(s):  
Castor Oil ◽  
Thermal Characterization ◽  
Natural Fibre ◽  
Cellulose Fibres ◽  
Sugarcane Straw ◽  
The Matrix ◽  
One Step ◽  
Polyurethane Composites ◽  
Environmental Interests

The development in the area of natural-fibre-reinforced composites has greatly increased in recent years. Using castor oil polyurethane (PU) as matrix for composites reinforced with lignin and cellulose from sugarcane straw is in tune with economical and environmental interests. The aim of this work was the thermal degradation study of castor oil-polyurethane composites reinforced with cellulose from sugarcane straw. For the obtainment of cellulose, sugarcane straw was pretreated by steam explosion, followed by a delignification with NaOH. For the production of the PU, the polyol (castor oil) to diisocyanate mass ratio was 1.5:1.0. Reinforcement of the matrix was done changing the concentration of cellulose fibres (5,10,15,20% w/w). Thermogravimetric analysis of the materials was carried out. The results obtained showed that the process of decomposition of the matrix occurs in one step, while for the composites it occurs in two steps. The addition of reinforcement in the matrix basically did not change the thermal stability of the composite.

Foam Injection Moulding of PE/EVA Blends with an Azodicarbonamide Agent

2015 ◽  
Vol 651-653 ◽  
pp. 863-868
Author(s):  
Roberto Spina
Keyword(s):  
Differential Scanning Calorimetry ◽  
Injection Moulding ◽  
Material Characterization ◽  
Polymer Melt ◽  
Scanning Calorimetry ◽  
Foaming Agent

The main purposes of this work are the technical investigation of polymer melt interactions of a well-designed PE/EVA blend with an azodicarbonamide foaming agent and the evaluation of the final characteristics of the foamed products. The investigation is mainly focused on the material characterization of the PE/EVA blend with Differential Scanning Calorimetry, taking samples from the virgin materials and from the injection moulded parts.

Chemical Characterization of Used Cooking Oil Foaming Agent as Admixture in Foamed Concrete

InCIEC 2013 ◽  
2014 ◽  
pp. 191-200
Author(s):  
M. M. A. Hafiz ◽  
A. R. M. Ridzuan ◽  
M. A. Fadzil ◽  
J. Nurliza
Keyword(s):  
Chemical Characterization ◽  
Foaming Agent ◽  
Cooking Oil ◽  
Used Cooking Oil ◽  
Foamed Concrete
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