Shalini Jain^*, Amit Parmar

Frontiers in Heat and Mass Transfer, Vol.9, pp. 1-8, 2017, DOI:10.5098/hmt.9.40

Abstract Present paper aims to investigate entropy generation of unsteady radiative Casson fluid flow through porous medium over a permeable stretching surface with inclined magnetic field. Time-dependent partial differential equations are transformed into non-linear ordinary differential equations using similarity transformations. These transformed equations are solved numerically by Runge–Kutta fourth-order with shooting technique. The effects of pertinent parameter such as magnetic field parameter, Casson fluid parameter, inclined angle of magnetic field parameter, Radiation parameter and Reynolds number on the velocity, temperature and entropy profiles are presented graphically. Local Nusselt and local Sherwood number are also obtained and presented in tabulated form. More >

Muhammad Ghozali^1,2, Yenny Meliana², Widya Fatriasari³, Petar Antov⁴, Mochamad Chalid^1,*

Journal of Renewable Materials, Vol.11, No.4, pp. 1963-1976, 2023, DOI:10.32604/jrm.2023.026060

Abstract Sugar palm (Arenga pinnata) starch is considered an important renewable, biodegradable, and eco-friendly polymer, which is derived from agricultural by-products and residues, with great potential for the development of biocomposite materials. This research was aimed at investigating the development of TPS biocomposites from A. pinnata palm starch using an extrusion process. Palm starch, glycerol, and stearic acid were extruded in a twin-screw extruder. Scanning electron microscopy (SEM) analysis of TPS showed that the starch granules were damaged and gelatinized in the extrusion process. The density of TPS was 1.3695 g/mL, lower than that of palm starch, and the addition of… More > Graphic Abstract

Yunxia Zhou¹, Hisham Essawy², Ai Liu¹, Chenyu Yang¹, Defa Hou¹, Xiaojian Zhou^1,*, Guanben Du¹, Jun Zhang^1,*

Journal of Renewable Materials, Vol.11, No.2, pp. 837-852, 2023, DOI:10.32604/jrm.2022.022792

Abstract This study presents an easily prepared film based on alkaline starch-polyvinyl alcohol hybrid and lignin fiber as an additive (SPL film). The SPL film was prepared under acidic conditions through a polycondensation reaction of PVA and a mixture incorporating alkaline starch and lignin fiber from agriculture or forest source. The examination using scanning electron microscopy (SEM) showed that the surface of SPL film was smooth and the lignin fiber had good compatibility within the film hybrid. Electrospray ionization mass spectroscopy (ESI-MS) and fourier transform infrared (FTIR) investigations indicated that alkaline starch and lignin fiber reacted with PVA under acidic conditions… More > Graphic Abstract

Supakij Suttiruengwong^1,*, Kanchana Sotho¹, Manus Seadan²

Journal of Renewable Materials, Vol.2, No.1, pp. 85-92, 2014, DOI:10.7569/JRM.2013.634135

Abstract A one-step process in an internal mixer was used to prepare Poly(butylene succinate) (PBS)/high-loading modifi ed tapioca starch (30–40 wt%) blends with low glycerol content (10–20 wt% of starch) as a plasticizer. To promote a good compatibility, two reactive agents, maleic anhydride (MA)/peroxide and methylene diphenyl diisocyanate (MDI), were selected and compared. The mechanical properties, morphology, and Molau test of the blends were investigated. The compatibility of PBS/starch blends was improved by both reactive agents at the suitable plasticizer loading (glycerol 10 wt% of starch). It was demonstrated that increasing mechanical properties resulted in good adhesion of PBS/starch interface and… More >

Rosana Moriana^1,2,*, Emma Strömberg¹, Amparo Ribes², Sigbritt Karlsson^1,*

Journal of Renewable Materials, Vol.2, No.2, pp. 145-156, 2014, DOI:10.7569/JRM.2014.634103

Abstract The purpose of this work was to study the effect of hydrothermal, biological and photo degradation on natural fi bres reinforced biodegradable starch-based (Mater-BiKE) composites to characterize the structural changes occurring under exposure to different environments. The composites water-uptake rate was hindered by the interfacial interactions between matrix and fi bres. Thermal, structural and morphological analysis provided useful information about the irreversible changes in the properties of the composites caused by degradation in soil and photodegradation, and their synergetic effects. The effects due to the photo-oxidation and degradation in soil on the composites depended on the different chemical composition of… More >

Kristine Koch^1,*, Daniel Johansson², Kalle Johansson³, Karin Svegmark⁴

Journal of Renewable Materials, Vol.2, No.2, pp. 134-144, 2014, DOI:10.7569/JRM.2014.634110

Abstract Properties of starch triacetate fi lms from different botanical origins were evaluated. Tensile and barrier properties, glass transition temperatures and moisture uptake were measured, and the molecular structure was characterised. High-amylose starches were good fi lm formers, normal potato starch formed continuous but brittle fi lms and potato amylopectin formed very brittle fi lms even after plasticisation. Barley amylopectin did not form continuous fi lms. Different plasticisers were studied and diacetin was shown to perform better than the standard plasticiser triacetin. All fi lms were water resistant, and the best fi lms gave water vapour barriers in the range of… More >

Fengwei Xie^1,*, Paul Luckman¹, John Milne¹, Lachlan McDonald¹, Conor Young¹, Chen Yang Tu¹, Teo Di Pasquale¹, Reinhard Faveere¹, Peter J. Halley^1,2

Journal of Renewable Materials, Vol.2, No.2, pp. 95-106, 2014, DOI:10.7569/JRM.2014.634104

Abstract Starch is a biopolymer that is widely available from agriculture/nature and thus is renewable and cheap. In addition, starch-based materials are biodegradable, offering a great advantage over traditional nonbiodegradable synthetic polymers. However, the poor processibility and product performance of starch have greatly impeded the wide application of starch in real applications. This paper reviews the current developments of the production of thermoplastic starch as a commodity renewable material. The biological origins of the feedstock, formulation development, processing requirements, as well as the important aspects that need to be addressed when designing a product from starch are discussed. It is hoped… More >

Weixing Zhang, Chunxia He^*

Journal of Renewable Materials, Vol.10, No.12, pp. 3263-3283, 2022, DOI:10.32604/jrm.2022.020516

Abstract With the exponential growth of the computing power, machine learning techniques have been successfully used in various applications. This paper intended to predict and optimize the shear strength of single lap cassava starchbased adhesive joints for comparison with the application of artificial intelligence (AI) methods. The shear strength was firstly determined by the experiment with three independent experimental variables (starch content, NaOH concentration and reaction temperature). The analysis of range (ANORA) and analysis of variance (ANOVA) were applied to investigate the optimal combination and the significance of each factor for the shear strength based on the orthogonal experiment. The performance… More >

Yongjie Zheng^1,2,3,*, Mingjian Xu¹, Jingzhi Tian¹, Meihong Yu¹, Bin Tan⁴, Hong Zhao^2,3,*, Yin Tang^2,3

Journal of Renewable Materials, Vol.10, No.11, pp. 2949-2959, 2022, DOI:10.32604/jrm.2022.019702

Abstract Fully bio-based and biodegradable starch/polylactic acid blends have received increasing attentions for their biodegradability and potential to offset the use of unsustainable fossil resources, specifically, their application in packaging. Herein, corn starch was first esterified with maleic anhydride and then compounded with polylactide (PLA) to prepare esterified corn starch/polylactic acid blends with starch content up to 35 wt%. The structures, morphologies, thermal and mechanical properties of starch or blends were investigated. The results showed that corn starch was successfully grafted with maleic anhydride, which showed increased crystallinity and particle size than native starch. Esterified corn starch/polylactic acid blends showed good… More >

Yatim Lailun Ni’mah^*, Suprapto Suprapto, Harmami, Ita Ulfin, Puput Asmaul Fauziyah

Journal of Renewable Materials, Vol.10, No.9, pp. 2365-2376, 2022, DOI:10.32604/jrm.2022.020001

Abstract Capsule shells have been successfully fabricated from water-soluble chitosan (WSC) with the addition of alginate and Gembili starch. WSC was synthesized from crab shell chitosan by depolymerization reaction. The capsule shells were made with the composition of WSC: Alginate, 2:1, 3:1 and 4:1 (w/w) with and without the addition of Gembili starch. Gembili starch was added with a ratio of Alginate: Starch, 1:1 (w/w). The capsule shell properties were evaluated according to Indonesian Pharmacopoeia standard. The solubility test showed that the capsule shells were comply with the standard. The highest degrees of swelling in water and HCl 0.1 N solution… More > Graphic Abstract