CANSU ULKER TURAN^1,*, YUKSEL GUVENILIR¹

Journal of Polymer Materials, Vol.38, No.3-4, pp. 271-280, 2021, DOI:10.32381/JPM.2021.38.3-4.8

Abstract Rice husk ash is a side-product of rice production; thus, it is a cheap, abundant, and renewable material, and utilized as an enzyme carrier to immobilize Candida antarctica lipase B. In this study, Candida antarctica lipase B immobilized onto rice husk ashes was used to catalyze ring opening polymerization of 16-membered lactone, ω-pentadecalactone. In order to determine the best polymerization conditions for highest molar mass polymer, reactions were proceeded at various temperatures and time periods. The best reaction conditions were obtained as 80°C and 6 hours (M_n = 34255 g mol^-1). Molecular structure of this polymer sample was confirmed via… More >

A. MADHAN KUMAR¹, K. JAYAKUMAR^2,*, M. SHALINI³

Journal of Polymer Materials, Vol.39, No.3-4, pp. 269-281, 2022, DOI:10.32381/JPM.2022.39.3-4.7

Abstract Polylactic acid (PLA) is the most popular thermoplastic biopolymer providing a stiffness and strength alternative to fossil-based plastics. It is also the most promising biodegradable polymer on the market right now, thus gaining a substitute for conservative artificial polymers. Therefore, the current research focuses on synthesizing and mechanical characterization of particlereinforced PLA composites. The hot compression molding technique was used to fabricate PLA-based composites with 0, 2.5, 5, and 7.5 weight % of sawdust, rice husk, and bagasse particle reinforcements to enhance the performance of the PLA. The pellets of PLA matrix were taken with an average size of 3… More >

Ida Bagus Alit, I Gede Bawa Susana^*

Frontiers in Heat and Mass Transfer, Vol.17, pp. 1-7, 2021, DOI:10.5098/hmt.17.15

Abstract Rice husk is a cheap fuel source and it is abundantly available in Indonesia. The heat exchanger mechanism was used in other to, the dried material was not contaminated by the combustion gases. The drying system consists of three components which include the furnace, heat exchanger pipe, and drying chamber. The heat exchanger pipe connects the furnace with the drying chamber and transfers the heat generated from rice husk burning to the drying chamber. The drying chamber was the section for drying the jackfruit dodol. It consists of 4 shelves and is equipped with an exhaust fan. The results showed… More >

Ida Bagus Alit, I Gede Bawa Susana^* , I Made Mara

Frontiers in Heat and Mass Transfer, Vol.19, pp. 1-7, 2022, DOI:10.5098/hmt.19.25

Abstract The study compared solar dryers with hot air from a heat exchanger double furnace during the drying of white turmeric. Solar drying is the process of drying the product in the sun. The hot air dryer consists of two furnaces with heat exchanger pipes and a drying chamber with six vertical shelves. During the test, the use of rice husk energy in a constant amount of 35 kg. Temperature and drying rate are higher in hot air dryers. Tests carried out for 420 minutes resulted in a change in moisture content from 88% to 35.88% and an average temperature of… More >

Wu Jing^1,2,#, Ren Luo^3,#, Sha Ding², Ping Duan^3,4,5,6,7,*

Journal of Renewable Materials, Vol.10, No.7, pp. 1813-1828, 2022, DOI:10.32604/jrm.2022.018771

Abstract In this study, the workability and reaction mechanism of metakaolin (MK) based geopolymer blended with rice husk ash (RHA) and silica fume (SF) was investigated. The prepared samples were subjected to tests including compressive strength and fluidity tests. X-ray diffraction (XRD) and Scanning electron microscope (SEM) were employed to explore the phase composition and microstructure of geopolymers. The molecular bonding information of geopolymer was provided by Fourier transform infrared spectroscopy (FTIR). Meanwhile, the porosity of geopolymer was obtained by Mercury intrusion porosimeter (MIP) analysis. The high-activity RHA obtained after calcination at 600°C was used as a supplementary cementitious material to… More > Graphic Abstract

Naphol Yoobanpot^1,*, Prakasit Sokrai², Natt Makul²

Journal of Renewable Materials, Vol.9, No.11, pp. 2033-2049, 2021, DOI:10.32604/jrm.2021.015849

Abstract According to empirical evidence, high levels of energy and considerable amounts of natural resources are used in the production of concrete. Given the context, this study explores self-consolidating concrete (SCC) that includes rice husk ash (RHA) and metal furnace slag (MFS) as an alternative to cement and the natural aggregates in standard SCC mixes. In this study, mixture designs are investigated with 20 wt.% of RHA, 10–30 wt.% of MFS and water-to-powder material ratios of 0.30 and 0.40. Based on the findings regarding the fresh-state, hardened-state, and durability properties of the resulting SCC mixes, it is evident that the use… More >

Jonathan Lacuesta^1,*, Iris Beatriz Vega Erramuspe², Liji Sobhana², Dennis Kronlund³, Jouko Peltonen³, Soledad Gutiérrez¹, Pedro Fardim^2,4

Journal of Renewable Materials, Vol.8, No.3, pp. 275-287, 2020, DOI:10.32604/jrm.2020.08861

Abstract Biobased adsorbents are eco-friendly materials used for water and wastewater treatment and air cleaning. This research work explores the potential use of rice husk chars as a low-cost adsorbent for pollutants from water, such as methylene blue and ethinylestradiol. Rice husk chars are prepared by combustion of rice husks (RH-Char) or pre-treated rice husks (PT-Char). A third char (M-Char) supplied by a local company which uses rice husks as combustion material is also studied. The chars are characterized by field emission scanning electron microscopy (FE-SEM) in conjunction with energy dispersive X-ray spectroscopy (EDX), X-ray powder diffraction (XRD), and zeta-potential measurements.… More >

Ning Li^1,2, Weiming Yi^1,2, Zhihe Li^1,2,*, Lihong Wang^1,2, Yongjun Li^1,2, Xueyuan Bai^1,2, Mei Jiang^1,2

Journal of Renewable Materials, Vol.8, No.3, pp. 329-346, 2020, DOI:10.32604/jrm.2020.08618

Abstract Bio-oil production via pyrolysis is one of promising technologies for renewable energy production from bio-wastes. However, the complicated biooil is still a challenge for high-valued application and during biomass pyrolysis, the emission of non-cleaned aerosol, the potential emission, namely carbonaceous aerosol (CA) increased the difficulty of the commercial promotion. In this study, Rice husk pyrolysis was performed in a semi-continuous fluidized bed reactor coupled with fractional condensers. The effects of pyrolysis and condensation temperature on the properties of bio-oil and emission of CA were investigated systemically. Results indicated that the in-situ separation of vapors was accomplished via condensers of different… More >

M. Lopretti^1,*#, N. Lecot^1,2,#, A. Rodriguez³, G. Lluberas¹, F. Orozco⁴, L. Bolaños⁴, G. Montes De Oca⁴, H. Cerecetto², J. Vega-Baudrit^4,5

Journal of Renewable Materials, Vol.7, No.4, pp. 313-324, 2019, DOI:10.32604/jrm.2019.00008

Abstract The biomass industrialization valorisation of grains and cereals is considered an opportunity for the countries where agro-industrial activity is one of its main economic activities, rendering new higher-value products with a concomitant solution to waste accumulation issues. To that end, in this work we describe and characterise bioactive compounds generation from rice husk by semi-solid fermentation, obtained from 500 g of the material at room temperature and 60% humidity with mixed cultures of Phanerochaete chrysosporium and Gloeophyllum trabeum. The extract was evaluated in different situations: murine mammary tumour cells (4T1), normal cells (NIH 3T3) and in Lactobacillus acidophilus, and Trichoderma… More >

V. Subrahmanian^1,*, M. Albert Noble Einstien²

Journal of Renewable Materials, Vol.7, No.2, pp. 171-192, 2019, DOI:10.32604/jrm.2019.00090

Abstract Nowadays an alternate source of filler from renewable and plant derivatives are being thought of in rubber industries due to their reliability, environmental and economic benefits. Rice Husk Ash (RHA) a byproduct of the rice milling industry is obtained on partial and as well as full combustion of the rice husks. This ash is a good source of silica, silicates and needle shaped carbon and hence can be used as filler for cements. In the present study, a detailed investigation was carried out to understand the RHA as reinforcing material using mechanical properties and fractography using SEM. The rubbers studied… More >