Browsing by Author "Jayasinghe, JMR"

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item: Conference-Full-text
Process optimization of microfibrillated cellulose extraction from cotton waste using response surface methodology
(IEEE, 2021-07) Jayasinghe, JMR; Ratnakumar, A; Samarasekara, AMPB; Amarasinghe, DAS; Adhikariwatte, W; Rathnayake, M; Hemachandra, K
Cotton is a natural staple fiber that mostly consists of cellulose compared to wood. The major economic value of cotton is in textile industry. Over the recent past years the demand for cotton consumption has increased significantly than its production. In textile manufacturing, cotton is blended with various other synthetic fibers such as polyester, nylon and lycra to obtain the desired properties. Though fabric recycling methods are available for pre-consumer garment waste, the processes are quite complicated in actual practice. In this work Microcrystalline Cellulose (MCC) extracted from cotton fabric waste was converted into Microfibrillated Cellulose (MFC) using acid hydrolysis method. However, the major challenge in using acid hydrolysis method is the low amount of yield. Three experimental factors that includes; acid concentration, hydrolysis time and temperature show the highest effect in yield and quality of MFC. Therefore, this experiment was designed to optimize the effect of these three independent factors on yield (%) and width (nm) of MFC. Response surface methodology was adapted to design the experiment and ANOVA statistical test results were used to determine the significant effect of those listed parameters on acid hydrolysis.
item: Conference-Full-text
Synthesis and characterization of microcrystalline cellulose from cotton textile waste
(IEEE, 2020-07) Jayasinghe, JMR; Samarasekara, AMPB; Amarasinghe, DAS; Weeraddana, C; Edussooriya, CUS; Abeysooriya, RP
Cotton is a natural resource that almost consists of 95% of cellulose and it is considered as the purest form of the naturally occurring cellulose. In the past recent years, cotton consumption demand in textile industry increased than the production. In textile engineering cotton blended with various other synthetic fibers such as polyester, nylon and lycra. Therefore, the fabric recycling methods are quite complicated due to mixture/blend of materials in garment waste. In this study, method was developed to identify the amount of cotton present in the cotton/polyester blend based on Fourier transformed infrared (FTIR) second-order derivative spectroscopic method. Microcrystalline cellulose (MCC) was extracted by using the recycle cotton waste. MCC indicates high economic value and remarkable physical properties like specific surface chemistry, biodegradability, low toxicity, renewability and low CO2 emissions into the atmosphere during their production cycle. The study discussed the properties including; morphological features and size (Scanning electron microscopy (SEM)), chemical functionality (Fourier transformed infrared (FTIR) spectroscopy), degree of crystallinity (X-ray diffraction (XRD)) and thermal properties (Thermogravimetric analysis (TGA)). The yield of the MCC was 42% while length, crystallinity index and thermal degradation starting temperature recorded as 20-60μm, 58% and 315oC respectively.