Amer A. Abdulrahman¹, Bashar J. Kadhim¹, Zainab Y. Shnain¹, Hassan Sh. Majidi², Asawer A. Alwaiti^1,*, Farooq Al-Sheikh¹, Adnan A. AbdulRazak¹, Mohammed Shorbaz¹, Mazin J. Shibeeb³

FDMP-Fluid Dynamics & Materials Processing, Vol.19, No.10, pp. 2579-2595, 2023, DOI:10.32604/fdmp.2023.027454

Abstract The well-known frictional effect related to liquid-liquid two-phase flow in pipelines can be reduced using drag-reducing additives. In this study, such an effect has been investigated experimentally using a mixture of oil and water. Moreover, numerical simulations have been carried out using the COMSOL simulation software. The measurements were taken in a horizontal pipe with the length and diameter equal to 3 and 0.125 m, respectively. Moreover, Polyethylene oxide with 150 ppm was exploited to reduce the drag effect while considering different water-to-oil fractions (0.3, 0.4, 0.5, and 0.7) and a constant total flow velocity More >

Xuyang Yao^1,*, Kecheng Liu¹, Zenan Zhou¹, Jun Zhou¹, Xianbin Huang², Tiemei Lu¹, Yongsheng Yu¹, He Li²

FDMP-Fluid Dynamics & Materials Processing, Vol.19, No.7, pp. 1775-1787, 2023, DOI:10.32604/fdmp.2023.025843

Abstract Water-based drilling fluids can cause hydration of the wellbore rocks, thereby leading to instability. This study aimed to synthesize a hydrophobic small-molecule polymer (HLMP) as an inhibitor to suppress mud shale hydration. An infrared spectral method and a thermogravimetric technique were used to characterize the chemical composition of the HLMP and evaluate its heat stability. Experiments were conducted to measure the linear swelling, rolling recovery rate, and bentonite inhibition rate and evaluate accordingly the inhibition performance of the HLMP. Moreover, the HLMP was characterized through measurements of the zeta potential, particle size distribution, contact angles,… More > Graphic Abstract

Chengtao Gao^1,2, Yang Wu³, Haibo Xie^1,*

Journal of Renewable Materials, Vol.11, No.3, pp. 1137-1152, 2023, DOI:10.32604/jrm.2022.021473

Abstract

Due to the increasing demand for modified polylactide (PLA) meeting “double green” criteria, the research on sustainable plasticizers for PLA has attracted broad attentions. This study reported an open-ring polymerization method to fabricate cellulose (MCC)-g-PCL (poly (ε-caprolactone)) copolymers with a fully sustainable and biodegradable component. MCC-g-PCL copolymers were synthesized, characterized, and used as green plasticizers for the PLA toughening. The results indicated that the MCC-g-PCL derivatives play an important role in the compatibility, crystallization, and toughening of the PLA/MCC-g-PCL composites. The mechanical properties of the fully bio-based PLA/MCC-g-PCL composites were optimized by adding 15 wt% MCC-g-PCL,

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Che Engku Noramalina Che Engku Chik¹, Amyra Suryatie Kamaruzzan¹, Ahmad Ideris Abdul Rahim¹, Fathurrahman Lananan^2,3, Azizah Endut⁴, Siti Aslamyah⁵, Nor Azman Kasan^1,*

Journal of Renewable Materials, Vol.11, No.3, pp. 1181-1197, 2023, DOI:10.32604/jrm.2023.022755

Abstract Chitin is the second most abundant polysaccharide, produced mainly as an industrial waste stream during crustacean processing. Chitin can be derived into chitosan through the deacetylation process. Conversion of shrimp waste into chitosan via the deacetylation process could be considered a practical approach for shell waste remediation. In this study, chitosan’s physicochemical characteristics extracted from two types of Pacific white leg shrimp, L. vannamei’s shell (i.e., rough and smooth), were compared with commercial chitosan. The yield, moisture, ash, solubility, water and fat binding capacity were measured. The degree of deacetylation (DDA) was calculated using FTIR, and… More > Graphic Abstract

Vikas Gulia, Anirban Sur^*

Frontiers in Heat and Mass Transfer, Vol.18, pp. 1-10, 2022, DOI:10.5098/hmt.18.40

Abstract Over the past few decades, the world is moving towards miniature products owing to the technological developments in variegated industrial domains such as aerospace, biomedical, electronics, etc. This has led to the exponential growth of efficient micro cooling systems which are light in weight and have effective thermal performance. Microchannel Heat Sinks and Microchannel Heat Exchangers are the widely adopted solutions for such efficient micro cooling systems. This paper comprehensively reviews the recent developments in the field of Microchannel Heat Sinks and Microchannel Heat Exchangers. Initially, the concept of microchannel cooling is discussed. Further, a More >

Diako Khodaei¹, Mohammad Nejatian^2,*, Hassan Ahmadi Gavlighi², Farhad Garavand^3,*, Ilaria Cacciotti⁴

Journal of Renewable Materials, Vol.10, No.11, pp. 2805-2817, 2022, DOI:10.32604/jrm.2022.021752

Abstract The seeds from bitter orange, the by-product of juice making units, hold the potential to facilitate novel, easy yet high-quality pectin extraction. To test this hypothesis, orange seed pectin (OSP) was extracted by distilled water and its compositional parameters and rheological behavior were then evaluated. Results showed that galacturonic acid was the major component of OSP (∼425 mg/g) confirming the purity of the extracted pectin, followed by glucose and some minor neutral sugars. The Mw (weight-average molar mass), Rn (number average molar mass), and Rz (z-average molar mass) values for the OSP were 4511.8 kDa,… More > Graphic Abstract

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 More >

Mahmood Hameed Majeed^*, Nabeel Kadhem Abd Alsaheb

Journal of Renewable Materials, Vol.10, No.9, pp. 2391-2408, 2022, DOI:10.32604/jrm.2022.019887

Abstract Tissue engineering’s main goal is to regenerate or replace tissues or organs that have been destroyed by disease, injury, or congenital disabilities. Tissue engineering now uses artificial supporting structures called scaffolds to restore damaged tissues and organs. These are utilized to attach the right cells and then grow them. Rapid prototyping appears to be the most promising technology due to its high level of precision and control. Bone tissue replacement “scaffolding” is a common theme discussed in this article. The fused deposition technique was used to construct our scaffold, and a polymer called polylactic acids… More > Graphic Abstract

Taofeeq D. Moshood, Gusman Nawanir, Fatimah Mahmud^*, Fazeeda Mohamad, Mohd Hanafiah Ahmad, Airin AbdulGhani

Energy Engineering, Vol.119, No.4, pp. 1611-1647, 2022, DOI:10.32604/ee.2022.019028

Abstract This study examines the literature on bio-based and biodegradable plastics published between 2000 and 2021 and provides insights and research suggestions for the future. The study gathers data from the Scopus and ISI Web of Science databases, then picks 1042 publications objectively and analyses their metadata. Furthermore, 144 papers from the Web of Science are analysed to present insights and classifications of the literature based on content analyses, including assessment/evaluation of the sustainability of bio-based and biodegradable Plastics, sustainability of biodegradable Plastics, and factors driving the uptake of biodegradable plastics. The study finds that most… More >

Bingyu Jian^1,2, Ke Cheng³, Haitao Li^1,2,*, Mahmud Ashraf^2,4, Xiaoyan Zheng^1,2, Assima Dauletbek^1,2, Mahdi Hosseini^1,2, Rodolfo Lorenzo⁵, Ileana Corbi⁶, Ottavia Corbi⁶, Kun Zhou⁷

Journal of Renewable Materials, Vol.10, No.8, pp. 2073-2098, 2022, DOI:10.32604/jrm.2022.021983

Abstract Fiber reinforced polymer (FRP) has been used in the construction industry because of its advantages such as high strength, light weight, corrosion resistance, low density and high elasticity. This paper presents a review of bonding techniques adopted to strengthen timber beams using FRP to achieve larger spans. Different methods of bonding between FRP and timber beams have been summarized with a focus on the influencing factors and their effects as well as relevant bond-slip models proposed for fundamental understanding. Experimental investigations to evaluate the flexural performance of timber beams strengthened by FRP bars, sheets and More > Graphic Abstract