Effect of air bubbling and ultrasonic processing on water absorption property of banana fibre-vinylester composites

2013 ◽  
Vol 48 (14) ◽  
pp. 1691-1697 ◽  
Author(s):  
Rajesh Ghosh ◽  
A Ramakrishna ◽  
G Reena
Keyword(s):  
Water Absorption ◽  
Ultrasonic Processing ◽  
Absorption Property ◽  
Banana Fibre ◽  
Water Absorption Property

Plasma Activated Acrylamide Initiated Polymerization of Acrylamide

2011 ◽  
Vol 391-392 ◽  
pp. 1168-1172
Author(s):  
Xiao Chun Fang ◽  
Sheng Gao Wang ◽  
Ming Yang Wang ◽  
Kai Wei Xu
Keyword(s):  
Molecular Weight ◽  
Water Absorption ◽  
Plasma Discharge ◽  
Polymerization Temperature ◽  
Absorption Property ◽  
Discharge Time ◽  
Water As Solvent ◽  
Water Absorption Property

A study was made on plasma-initiated polymerization of polyacrylamide (PAM) with high superabsorbent property. The viscosity-averaged molecular weight Mη of this PAM was 6.2×106g/mol in the measurement of viscosity by using water as solvent. Its conversion and water absorption calculated are 70% and 300g/g respectively. The effects of plasma discharge time, polymerization temperature and duration on the conversion and the molecular weight of the products were also investigated. The results of this study suggested that the method of plasma initiated polymerization could greatly enhance the molecular weight and water absorption property of the polymer.

Experimental Study on Manufacturing Environmental Protection Baking Free Brick of Waste Concrete

2014 ◽  
Vol 584-586 ◽  
pp. 1188-1191
Author(s):  
Peng Fei Li ◽  
Xian Chun Zheng ◽  
Ling Feng Ji
Keyword(s):  
Experimental Study ◽  
Water Absorption ◽  
Environmental Protection ◽  
Absorption Property ◽  
Paper Test ◽  
Waste Concrete ◽  
Maintenance Time ◽  
The Matrix ◽  
Water Absorption Property ◽  
Material Studies

This paper test the strength intensity,water absorption property of 10 baking—free bricks using the matrix cementing component in waster concrete as the material,studies the effect of m~ing ratio and maintenance time on pmpe~y to get the best mKing ratio of this kind of brick.It also analyzes the intension resources of this brick.

scholarly journals Effects of Two Pre-Treatment Methods on Water Absorption Property of Polyester-Fibre Composites

2020 ◽  
Vol 5 (12) ◽  
pp. 92-95
Author(s):  
Pauline N. Obianuko ◽  
Tessy U. Onuegbu
Keyword(s):  
Water Absorption ◽  
Unsaturated Polyester ◽  
Polyester Fibre ◽  
Treatment Method ◽  
Fibre Volume ◽  
Absorption Property ◽  
Treatment Methods ◽  
Fibre Composites ◽  
Pre Treatment ◽  
Water Absorption Property

The use of plant fibres as reinforcement in composite materials is finding increasing interest in the automotive and building industry, and the properties of plant fibre composites have been addressed in numerous research studies. The replacement of synthetic fibres with natural fibres in composites is based on their renewable and environmentally friendly nature. The aim of this work is to investigate the effects of two chemical pre-treatment methods on the water absorption property of polyester-fibre composites. Fully grown kenaf (hibiscus cannabalis) bast fibres were manually retted from the stalk, washed, and cut into short fibre lengths of about 10 cm. One portion of the fibres was pre-treated with 5% pbw NaOH solution before immersing it in glacial acetic acid and then in acetic anhydride. The second portion was pre-treated with 5%pbw of NaOH and 0.125% of KMnO4 in acetone. The third portion of fibres was untreated to serve as control. The ground fibre was incorporated into ortho unsaturated polyester and cast with Teflon square shaped mould. The cured samples were weighed and immersed in water at room temperature until no further gain in weight was observed. The SEM of the fibres and the composites was taken. The results showed that the acetylation pre-treatment method reduced the water absorption property of the composites by a minimum of 46.0% across all fibre volume fractions while the permanganate pre-treatment reduced it by at least 25.5%. Chemical pre-treatment of fibres can therefore

scholarly journals Properties of Cement Brick with Partial Replacement of Sand and Cement with Oil Palm Empty Fruit Bunches and Silica Fume

2019 ◽  
Vol 5 (3) ◽  
pp. 289 ◽  
Author(s):  
Jen Hua Ling ◽  
Yong Tat Lim ◽  
Wen Kam Leong ◽  
Euniza Jusli ◽  
How Teck Sia
Keyword(s):  
Water Absorption ◽  
Construction Industry ◽  
Silica Fume ◽  
Oil Palm ◽  
Partial Replacement ◽  
Absorption Property ◽  
Empty Fruit Bunches ◽  
Negative Implication ◽  
Water Absorption Property ◽  
By Products

Oil palm empty fruit bunches (EFB) and silica fume (SF) are the by-products of the oil palm plantation and the ferroalloy smelting industries, respectively. Improper disposal of these materials leads to negative implication to the environment. This study was carried out to investigate the potential application of EFB and SF in cement bricks. EFB fibre and SF replaced up to 25% of sand and cement in the mix, respectively, in several groups of specimens that distinguished the normal, EFB-, SF- and EFB-SF-cement bricks. The specimens were tested for the compressive strength, density and water absorption property. The results reveal that SF, at an optimum amount of 10% cement replacement, increased 10% of the strength of the cement brick. EFB fibre reduced the strength and density but increased water absorption property of the cement brick. For application in the construction industry, SF and EFB fibre contents should be kept within 10% and 20% respectively.

scholarly journals The effect of adding natural materials waste on the mechanical properties and water absorption of epoxy composite using grey relations analysis

2022 ◽  
pp. 131-142
Author(s):  
Ahmad A. Khalaf ◽  
Salwa A. Abed ◽  
Saad Sami Alkhfaji ◽  
Mudhar A. Al-Obaidi ◽  
Muammel M. Hanon
Keyword(s):  
Mechanical Properties ◽  
Water Absorption ◽  
Polymer Composites ◽  
Epoxy Composites ◽  
Absorption Property ◽  
Natural Materials ◽  
Relational Analysis ◽  
Water Absorption Property ◽  
Grey Relational ◽  
Micro Fillers

Recently, there has been a tendency for scientific studies to deal with natural materials as fillers and reinforcement for polymer composites, which are used in many different applications due to their environmentally friendly properties when compared to synthetic materials. The current study aims to preserve the environment by dealing with natural materials and their influence on the mechanical properties and water absorption property of the polymer composites. In this study, epoxy composites were produced from local natural sourced non-hazardous raw natural materials using grey relational analysis (GRG). The materials used for fabrication include micro-filler of pollen palm 50 μm, seashell 75 μm and epoxy resin. Nine different composites were prepared using pollen palm and seashell as reinforcement material by varying the wt % of the micro-filler. Rule of the mixture was used for formulation and wt % of (0.5, 1 and 1.5) % reinforcement and 99.5, 99 and 98.5 % epoxy (binder) were used for composites. Grey relational analysis was conducted in order to scale the multi-response performance to a single response. The results indicate that optimum performance can be achieved with the addition of 1.5 wt % micro-filler of seashell, which achieved the first rank, while the second rank achieved by 0.5 wt % micro-filler of palm pollen and seashell when compared to other composites. The addition of micro-fillers has improved greatly the mechanical properties of epoxy composites. The loading of micro-fillers has influenced the water absorption property of composites based epoxy in ascending order

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