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  • Open Access

    ARTICLE

    Preparation and Study of Borosilicate Foam Glass with High Thermal Insulation and Mechanical Strength

    Yiwen Zhang1, Jianjun Xie1,*, Minghui Sun1, Shaolong Wang1, Tengfei Xu2,3, Yonggen Xu2,3, Xiaoqing Ding2,3, Ying Shi1, Lei Zhang1

    Journal of Renewable Materials, Vol.11, No.5, pp. 2125-2141, 2023, DOI:10.32604/jrm.2023.025127

    Abstract Foam glass is a kind of green building material that is widely used because of its excellent thermal insulation and mechanical properties. In this study, the borosilicate foam glass was fabricated by powder sintering method using recycled soda lime waste glass, quartz, and borax as the primary raw materials. CaCO3 was used as a foaming agent and Na2CO3 as a flux agent. Results showed that as the quartz content decreases from 30 to 17.5 wt.% and borax content increases from 5 to 17.5 wt.%, the pore size, porosity, and thermal insulation of borosilicate foam glass increase significantly, while the compressive strength decreases… More > Graphic Abstract

    Preparation and Study of Borosilicate Foam Glass with High Thermal Insulation and Mechanical Strength

  • Open Access

    ARTICLE

    Preparation and Characterization of Thermoplastic Starch from Sugar Palm (Arenga pinnata) by Extrusion Method

    Muhammad Ghozali1,2, Yenny Meliana2, Widya Fatriasari3, Petar Antov4, Mochamad Chalid1,*

    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

    Preparation and Characterization of Thermoplastic Starch from Sugar Palm (<i>Arenga pinnata</i>) by Extrusion Method

  • Open Access

    ARTICLE

    Preparation and Properties of Vegetable-Oil-Based Thioether Polyol and Ethyl Cellulose Supramolecular Composite Films

    Ruyu Yan1,2,3,4, Jian Fang1,*, Xiaohua Yang2,3,4,5,6, Na Yao2,3,4,5,6, Mei Li2,3,4,5,6, Yuan Nie2,3,4,5,6, Tianxiang Deng2,3,4,5,6, Haiyang Ding2,3,4,5,6, Lina Xu2,3,4,5,6, Shouhai Li2,3,4,5,6,*

    Journal of Renewable Materials, Vol.11, No.4, pp. 1937-1950, 2023, DOI:10.32604/jrm.2023.025126

    Abstract Ethyl cellulose (EC), an important biomass-based material, has excellent film-forming properties. Nevertheless, the high interchain hydrogen bond interaction leads to a high glass transition temperature of EC, which makes it too brittle to be used widely. The hydroxyl group on EC can form a supramolecular system in the form of a non-covalent bond with an effective plasticizer. In this study, an important vegetable-oil-based derivative named dimer fatty acid was used to prepare a novel special plasticizer for EC. Dimer-fatty-acid-based thioether polyol (DATP) was synthesized and used to modify ethyl cellulose films. The supramolecular composite films of DATP and ethyl cellulose… More > Graphic Abstract

    Preparation and Properties of Vegetable-Oil-Based Thioether Polyol and Ethyl Cellulose Supramolecular Composite Films

  • Open Access

    ARTICLE

    A Secure Framework for Blockchain Transactions Protection

    Wafaa N. Al-Sharu1,*, Majdi K. Qabalin2, Muawya Naser2, Omar A. Saraerh1

    Computer Systems Science and Engineering, Vol.45, No.2, pp. 1095-1111, 2023, DOI:10.32604/csse.2023.032862

    Abstract One of the most extensively used technologies for improving the security of IoT devices is blockchain technology. It is a new technology that can be utilized to boost the security. It is a decentralized peer-to-peer network with no central authority. Multiple nodes on the network mine or verify the data recorded on the Blockchain. It is a distributed ledger that may be used to keep track of transactions between several parties. No one can tamper with the data on the blockchain since it is unchangeable. Because the blocks are connected by hashes, the transaction data is safe. It is managed… More >

  • Open Access

    ERRATUM

    Preparation of Kenaf Biochar and Its Adsorption Properties for Methylene Blue

    Xin Wan1,2,#, Zhigang Xia3,4,#, Xiaoli Yang1,2, Chengfeng Zhou2, Yuanming Zhang1,2, Haoxi Ben1,2, Guangting Han1,2, Wei Jiang1,2,*

    Journal of Renewable Materials, Vol.11, No.3, pp. 1531-1531, 2023, DOI:10.32604/jrm.2023.027109

    Abstract This article has no abstract. More >

  • Open Access

    ARTICLE

    Nano-CaO2 Promotes the Release of Carbon Sources from Municipal Sludge and the Preparation of Double-Network Hydrogels with High Swelling Ratios

    Yalin Li1,2,*, Yu Huang2, Lei Liu1, Haozhao Liu1, Haiyang He1, Dongxue Lu1, Tingting Dong1

    Journal of Renewable Materials, Vol.11, No.3, pp. 1237-1253, 2023, DOI:10.32604/jrm.2022.022972

    Abstract

    In this study, hydrogels were prepared from municipal sludge to recycle and realize the value-added utilization of the carbon components in this abundant waste material. The carbon sources were extracted from the municipal sludge using synthesised nano CaO2 as an oxidant, and the carbon sources were graft copolymerised with acrylic acid monomer using N, N′-methylenebisacrylamide as a crosslinking agent and ammonium persulfate as an initiator. The factors influencing the hydrogel preparation were investigated by single-factor experiments. Based on the results of the single-factor experiments, a hydrogel with a swelling ratio of up to 19768.4% at 12 h was prepared with… More > Graphic Abstract

    Nano-CaO<sub>2</sub> Promotes the Release of Carbon Sources from Municipal Sludge and the Preparation of Double-Network Hydrogels with High Swelling Ratios

  • Open Access

    ARTICLE

    Preparation of Film Based on Polyvinyl Alcohol Modified by Alkaline Starch and Lignin Fiber

    Yunxia Zhou1, Hisham Essawy2, Ai Liu1, Chenyu Yang1, Defa Hou1, Xiaojian Zhou1,*, Guanben Du1, Jun Zhang1,*

    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

    Preparation of Film Based on Polyvinyl Alcohol Modified by Alkaline Starch and Lignin Fiber

  • Open Access

    ARTICLE

    Water-Based Environmentally Friendly Pesticide Formulations Based on Cyclodextrin/Pesticide Loading System

    Xinyu Guo1, Zhe Sun2, Rui Zhao2, Hongyi Shang2, Jiangyu Liu2, Yong Xu2, Laihua Liu1,*, Xuemin Wu2,*

    Journal of Renewable Materials, Vol.11, No.2, pp. 777-789, 2023, DOI:10.32604/jrm.2022.022811

    Abstract Difenoconazole (DIF) is a representative variety of broad-spectrum triazole fungicides and liposoluble pesticides. However, the water solubility of DIF is so poor that its application is limited in plant protection. In addition, the conventional formulations of DIF always contain abundant organic solvents, which may cause pollution of the environment. In this study, two DIF/cyclodextrins (CDs) inclusion complexes (ICs) were successfully prepared, which were DIF/β-CD IC and DIF/hydroxypropyl-β-CD IC (DIF/HP-β-CD IC). The effect of cyclodextrins on the water solubility and the antifungal effect of liposoluble DIF pesticide were investigated. According to the phase solubility test, the molar ratio and apparent stability… More >

  • Open Access

    ARTICLE

    Preparation and Properties of Chinese Lacquer Modified by Methylolureas

    Qiang Xiao1,2, Yanjun Cao1,2, Hailu Tan1,2, Qiaoling Feng1,2, Xinyue Gu1,2, Jianhua Lyu1,2, Hui Xiao1,2, Ming Chen1,2,*, Yuzhu Chen1,2,*

    Journal of Renewable Materials, Vol.11, No.2, pp. 1003-1016, 2023, DOI:10.32604/jrm.2022.023621

    Abstract In this study, different molar of methylolureas (MMU) were used to improve the properties and drying speed of the raw lacquer (RL). The drying time, gloss, pencil hardness and impact resistance of the lacquer film were tested. The thermal behaviors and chemical structures of the lacquer membrane were also discussed by thermal gravimetric analysis (TGA), fourier infrared spectrometer (FT-IR) and nuclear magnetic resonance (NMR) analysis, respectively. The results demonstrated that lower molar ratio MMU can significantly improve the properties of lacquer. The TGA analysis showed that the modified lacquer had high thermal stability than that of the control. The FT-IR… More > Graphic Abstract

    Preparation and Properties of Chinese Lacquer Modified by Methylolureas

  • Open Access

    ARTICLE

    Preparation and Performance of n-Dodecane Microencapsulated Phase Change Cold Storage Materials

    Pan Zhang, Lingling Xu*, Xin Shi, Zemeng Guo, Jiajia Cheng

    Journal of Renewable Materials, Vol.11, No.2, pp. 689-705, 2023, DOI:10.32604/jrm.2022.022232

    Abstract Cold chain transportation is currently a hot research topic. Since the traditional refrigeration methods lead to the consumption of large amounts of energy, the search for new energy storage materials is a major trend. In the present contribution, n-dodecane/PMMA microencapsulated phase change materials were prepared by suspension polymerization for ice-temperature cold chain transportation and their preparation parameters were explored using the encapsulation ratio as optimization indicator. The results show that the n-dodecane-containing microcapsules have a maximum encapsulation ratio of 93.2% when using a core-to-wall ratio of 3:1, 5% of emulsifier, 30% of crosslinker, and 2000 rpm of emulsification speed. The phase… More >

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