Jia Liu, Yuwu Zhang^*

The International Conference on Computational & Experimental Engineering and Sciences, Vol.33, No.2, pp. 1-1, 2025, DOI:10.32604/icces.2025.011553

Abstract The rigidity of the resin matrix is a critical factor affecting the impact resistance of composites [1]. However, the intrinsic relationship between resin matrix rigidity and ballistic performance remains insufficiently understood. To reveal the influence mechanisms of resin matrix rigidity on ballistic performance, this study compares the ballistic limits of PBO-140, PBO-200, Aramid III, and Aramid II fiber reinforced composites with resin matrices of different rigidities (epoxy resin, PX90, and PX30) through ballistic impact tests. The experimental results show that, the ballistic limit of composites with PX90 resin is higher than that of composites with… More >

Minjie Li¹, Wanhao Shi¹, Dingqian Yang², Manman Yuan², Jiabao Du², Xuandong Liu^1,*

Energy Engineering, Vol.122, No.10, pp. 4297-4312, 2025, DOI:10.32604/ee.2025.066337 - 30 September 2025

Abstract In Xinjiang, China, Oil-immersed paper bushings used in reactors are highly susceptible to discharge breakdown faults due to drastic fluctuations in environmental and oil temperatures. To mitigate this problem, oil-free and explosion-proof epoxy resin-impregnated paper (ERIP) bushings are recommended as replacements. This study develops a multi-physics(electric-thermal-fluid) coupling model for 750 kV high voltage reactors ERIP bushings. The model aims to comprehensively assess their thermal and electrical performance under extreme ambient temperatures ranging from −40°C to 90°C and oil temperatures varying from −10°C to 90°C. The results demonstrate that the bushing temperature rises consistently with increases… More >

Zhenzhou Wang¹, Rui Luo¹, Wenqing Yang¹, Seng Hua Lee^2,*, Wei Chen Lum³, Longjiang Liu⁴, Xiaojian Zhou¹, Jun Zhang^1,*

Journal of Renewable Materials, Vol.13, No.6, pp. 1229-1249, 2025, DOI:10.32604/jrm.2025.02024-0073 - 23 June 2025

Abstract Highly flame-retardant bio-based composites were prepared in this study. Firstly, glucose-citric acid (GC) resin was synthesized through the interaction of glucose and citric acid derived from agricultural and forestry sources. Polyvinyl alcohol (PVA) served as a toughening agent, whereas walnut shell powder (WSP) functioned as a filler in the formulation of a thermosetting bio-based GC-PVA-WSP (GCPW) composite with GC resin. The findings demonstrated that boric acid increased the limited oxygen index (LOI) value of GCPW to 33%, while simultaneously diminishing its total smoke production (TSP) by 99.9%, and achieving a flame retardant index (FRI) of More > Graphic Abstract

Aiga Ivdre^*, Ralfs Pomilovskis, Arnis Abolins

Journal of Renewable Materials, Vol.13, No.2, pp. 349-361, 2025, DOI:10.32604/jrm.2024.056820 - 20 February 2025

Abstract Studies on the use of renewable materials for various applications, including polymers, have gained momentum due to global climate change and the push towards a circular economy. In this study, polymer resins were developed through Michael 1,4-addition. The precursors were synthesized from tall oil-based acetoacetates derived from epoxidized tall oil fatty acids or their methyl esters. Two different epoxidation methods were employed: enzymatic epoxidation of tall oil fatty acids and ion-exchange resin epoxidation of tall oil fatty acid methyl esters. Following oxirane opening and transesterification with trimethylolpropane, further esterification or transesterification was carried out to… More >

Kristine Meile^1,*, Martins Romanovskis^1,2, Thomas Nicol³, Neil Hindle³, Aivars Zhurinsh¹

Journal of Renewable Materials, Vol.12, No.12, pp. 2135-2152, 2024, DOI:10.32604/jrm.2024.056775 - 20 December 2024

Abstract Fast pyrolysis of pre-treated birch wood in a super-heated steam environment produces a condensate rich in anhydrosugars. With the objective to obtain several product streams from this condensate, the possibility of extracting additional chemical species is explored, thus promoting the development of a pyrolysis-based biorefinery. In this work, the extraction and recovery of pyrolytic phenols from birch wood pyrolysis condensate was studied using ion exchange resins. With an aim to achieve effective phenol recovery, while obtaining high purity levoglucosan, basic ion exchange resins, both in OH⁻ and Cl⁻ form, as well as polystyrene-divinyl resins without functional… More > Graphic Abstract

Yuanyuan Feng¹, Bingli Pan^1,*, Hongyu Liu^1,2, Yuxuan Zhou¹, Xiaofan Ding¹, Xinyu Yuan¹

Journal of Polymer Materials, Vol.41, No.3, pp. 191-203, 2024, DOI:10.32604/jpm.2024.055558 - 30 September 2024

Abstract In this paper, knitted aramid fiber (AF) was used as the support, and graphene oxide (GO) was loaded on the support by the polydopamine (PDA) method. Epoxy resin (EP) was poured to obtain composite materials. The tribological and mechanical properties of the composites were tested, and the wear surface of the composites was characterized by scanning electron microscopy (SEM) and three-dimensional morphology. The results show that knitted AF can markedly improve the mechanical properties of the composites. As a two-dimensional material, GO plays an effective lubrication role, and GO effectively enhances the tribological properties of… More >

Lan Huang¹, Wenbin Yuan¹, Hisham Essawy², Xiaojian Zhou^3,*, Xinyi Chen^3,*

FDMP-Fluid Dynamics & Materials Processing, Vol.20, No.10, pp. 2219-2234, 2024, DOI:10.32604/fdmp.2024.052445 - 23 September 2024

Abstract Tannin foam is a new functional material. It can be widely applied to the automobile industry, construction industry, and packaging industry due to its wide range of raw materials, renewable, easily degraded, low cost and almost no pollution. Preparing tannin foam is a very complex process that includes high temperature, two phases, mechanical agitation, and phase change. To investigate the influence of the stirring velocity and paddle shape, simulation was calculated by making use of the volume of fluid (VOF) method and multiple reference frame (MRF) method in a three-dimensional flow field of tannin-based foaming… More > Graphic Abstract

Apri Heri Iswanto^1,*, Harisyah Manurung¹, Asma Sohail², Lee Seng Hua^3,9, Petar Antov⁴, Deded Sarip Nawawi⁵, Sarah Latifah⁵, Dewi Shafa Kayla^5,6, Sukma Surya Kusumah⁶, Muhammad Adly Rahandi Lubis⁶, Linda Makovická Osvaldová⁷, Mohd. Hazwan Hussin⁸, Rangabhashiyam Selvasembian⁹, Lum Wei Chen¹⁰, Puji Rahmawati Nurcahyani⁶, Nam Hun Kim¹¹, Widya Fatriasari⁶

Journal of Renewable Materials, Vol.12, No.7, pp. 1311-1341, 2024, DOI:10.32604/jrm.2024.052172 - 21 August 2024

Abstract Lignin, lignosulfonate, and synthesized phosphorylated lignosulfonate were introduced as green fillers in citric acid-sucrose adhesives for bonding particleboard fabricated from areca leaf sheath (ALS). The characteristics of particleboards were compared to that of ultralow emitting formaldehyde (ULEF-UF). The fillers derived from Eucalyptus spp. kraft-lignin were added for flame retardancy enhancement. 10% of each lignin and modified lignin was added into the ULEF-UF and citric acid-sucrose bonded particleboards. Analyses applied to particleboards included thermal characteristics, X-ray diffraction analysis (XRD), morphological properties, Fourier transform infrared spectroscopy (FTIR), as well as physical, mechanical, and fire resistance characteristics of the… More > Graphic Abstract

Qianyu Zhang^1,2,#, Shi Chen^1,2,#, Long Cao^1,2, Hong Lei³, Antonio Pizzi⁴, Xuedong Xi^1,2,*, Guanben Du^1,2

Journal of Renewable Materials, Vol.12, No.2, pp. 235-244, 2024, DOI:10.32604/jrm.2023.029537 - 11 March 2024

Abstract Using non-toxic, low-volatile glyoxal to completely replace formaldehyde for preparing urea-glyoxal (UG) resin adhesive is a hot research topic that could be of great interest for the wood industry. However, urea-glyoxal (UG) resins prepared by just using glyoxal instead of formaldehyde usually yields a lower degree of polymerization. This results in a poorer bonding performance and water resistance of UG resins. A good solution is to pre-react urea to preform polyurea molecules presenting already a certain degree of polymerization, and then to condense these with glyoxal to obtain a novel UG resin. Therefore, in this… More > Graphic Abstract

LIJUN CHEN^*, ZHEQING GONG, ZHENGRONG FU

Journal of Polymer Materials, Vol.40, No.3-4, pp. 157-164, 2023, DOI:10.32381/JPM.2023.40.3-4.3

Abstract The organic fluorine modified/containing cationic acrylic resin is prepared via solution polymerization technique using hexafluorobutyl methacrylate (HFMA) along with butyl acrylate (BA), methyl methacrylate (MMA), styrene (St), dimethylaminoethyl methacrylate (DMAEMA) and hydroxy propyl methacrylate (HPMA) as the comonomers, proprylene glycol monomethyl ether (PGME) as the solvent, and 2, 2-Azo-bis-iso-butyronitrile (AIBN) as the initiator. The synthesized resin in which fluorine atom is introduced into the polymer chains. The cathodic electrodeposition (CED) coatings were prepared by mixing the synthesized resin and blocked isocyanate. The influence of the amount of organic fluorine on the resin and the resultant More >