American Research Journal of Chemistry

Mubarak Hossen1, Ayesha Khatton1, Mahbubur Rahman, MD1, F. A. Dilruba1, Anisur Rahman Dayan, MD2

Human being is very much dependant on plant fibres for various purposes. Natural fibres provide many solutions against general needs of mankind. All fibres cannot be defined as textile fibres. Textile fibres have softness, flexiblity, drapability, durability properties. Jute is a golden fibre of Bangladesh and it is used for various purposes. For the assessment of fibre quality of three types of jute fibre e.g. newly released BJRI Tossa Pat-8 (Robi-1), bleached fibre and variety O-9897 were considered for the analysis of physical properties (Reed jute fibre length, Brightness index, Whiteness index, Bundle strength and Fineness index) and chemical analysis (Cellulose, Hemicellulose, Lignin, Ash content, Fat/Oil content, Oil content in jute seed, Pectin content and saponification value) under the present study. Some field level morphological information was taken as quality contributing characteristics. The study was conducted at the Fibre Chemistry Department, Chemistry Division and Textile Physics Division of Bangladesh Jute Research Institute, Dhaka, Bangladesh during 2019-2020. The assessment of physico-chemical properties of the variety BJRI Tossa Pat-8 (Robi-1) was blue seeded with lower percentage of oil content than naturally brown seeded but saponification value was higher, Brightness (22.04%), fineness (36.26%) and bundle strength (06.20 lb/mg) index were very much comparable to bleached jute samples using 6% hydrogen peroxide. Cellulose content was 65.68% as well as lignin and hemicelluloses content were 13.95% and 17.94% respectively which were more prominent than O-9897 varieties of jute fibres.

Mubarak Hossen1, Mahmuda Begum1, Azizur Rahman2, Ayesha Khatton1

Noise industry is a major cause of fatigue, irritation, decreased productivity and occupational accidents. Dangerous to hear continuous exposure to 90dB or above. One of the main methods of noise control is to place sound absorbing barriers (made of jute) between the source and the subject. The goal of this study is to study the acoustic properties of biodegradable and easily disposable natural fiber jute and compound it for noise reduction in household appliances, automotive and architectural applications. The effect of the type of fabric and the number of layers of different non woven fabrics have been studied in indigenously made tools. Nonwoven fabrics show higher noise reduction than woven fabrics. The fabric is assessed by placing the fabric 8 cm from the sound source and the receiver decibel meter (R) 16 cm on the same side. It can be observed that randomly laid jute samples reduce the maximum noise among all the samples tested. As the number of layers of nonwoven fabric increases, the noise reduction through the sample increases initially but after most it remains almost unchanged.