Article
Polymer Science
Mahshid Maroufkhani, AliAsghar Katbab, Hasti Bizhani, Jinwen Zhang
Summary: In this study, the effects of sulfur content on supertough dynamically vulcanized blends (DV) of PLA and NBR were investigated. It was found that the addition of sulfur resulted in a more uniform structure of the rubber phase in the blends, leading to a significant increase in impact strength.
Article
Materials Science, Multidisciplinary
Manikandan Ilangovan, Taizo Kabe, Tadahisa Iwata
Summary: In this study, a new ester compound from paramylon was synthesized and blended with PBAT. The structure and morphology of the blends were found to greatly affect their thermal and mechanical properties. Increasing the PBAT loading led to improved mechanical properties, with a unique submicrometer-level bead dispersion resulting in significantly enhanced impact strength. The PBAT blend films also showed high tensile strengths, making them suitable for mulch films and sustainable packaging applications.
ACS APPLIED POLYMER MATERIALS
(2023)
Article
Biochemistry & Molecular Biology
Xiaolong Han, Yi Han, Yujuan Jin, Huafeng Tian, Zhao Wang, Jiawei Huang, Shuang Men, Rakesh Kumar
Summary: This study synthesized bio-based engineering polyester elastomers (BEPE) to enhance the toughness of Poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) and prepared fully bio-based blends. The results showed that the addition of BEPE significantly improved the elongation at break, impact strength, and tensile toughness of the PHBV blends.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2022)
Article
Materials Science, Characterization & Testing
Ying Chen, Jie Li, Jiawei Lu, Meng Ding, Yi Chen
Summary: PVA hydrogels with high strength and toughness can be fabricated through dual physical and chemical cross-linking. The best mechanical properties are achieved by reacting at room temperature and subsequently undergoing freeze-thaw and annealing treatment. Additionally, the mechanical properties of PVA hydrogel increase and then decrease with the increase of molecular weight or mass fraction. By changing the reaction solvent, the mechanical properties of PVA hydrogel can be effectively adjusted.
Article
Chemistry, Physical
Iqbal Ahmed Moujdin, Husam Saber Totah, Hani Abdulelah Abulkhair, Abdulmohsen Omar Alsaiari, Amer Ahmed Shaiban, Hussam Adnan Organji
Summary: This study investigated the low shrinkage curing techniques and characterization of unsaturated polyester and vinyl ester reinforced composites, with a focus on the influence of methyl ethyl ketone peroxide (MEKP). The results demonstrated that CO2-cured reinforced composites exhibited lower shrinkage rate, higher tensile strength, and flexural modulus compared to air-cured composites. Additionally, the lowest amount of MEKP significantly improved the contact angle of the reinforced composites.
Article
Polymer Science
Wahid Ferdous, Allan Manalo, Peng Yu, Choman Salih, Rajab Abousnina, Tom Heyer, Peter Schubel
Summary: This study investigated the tensile fatigue behavior of polyester and vinyl ester based GFRP laminates under different stress ratios and environmental conditions, proposing a fatigue model based on resin types, stress ratio, environmental conditioning, and maximum applied stress. Results showed that resin system, stress ratio, and environmental condition significantly affected the tensile fatigue life of GFRP laminates, highlighting the importance of resin types and environmental conditions in the proposed fatigue model.
Article
Chemistry, Multidisciplinary
Sang Gyu Ji, Lawrence T. Drzal, Donghwan Cho
Summary: In this study, exfoliated graphite nanoplatelets were chemically modified with carboxyl-terminated poly(butadiene-co-acrylonitrile) liquid rubber to enhance the impact toughness of thermosetting resin. The impact strength of the composites was significantly improved by even low contents of CTBN-grafted EGN. This research demonstrates the potential of using chemically modified EGN for improving the properties of composite materials.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2021)
Article
Polymer Science
Mengmeng Wang, Xianrong Liang, Heng Wu, Linlin Huang, Gang Jin
Summary: In this study, super toughened PLA-based blends were successfully prepared by melt blending PLA with EVA and compatibilizing with E-MA-GMA. The addition of E-MA-GMA promoted phase adhesion and increased interface thickness, resulting in a super-toughened blend with incomplete fracture behavior during impact tests. The maximum impact strength of 77.6 kJ/m(2) was achieved with 12 wt% E-MA-GMA in the ternary blend, showing a 27.7 times improvement over neat PLA. Rheological and micromorphology analysis demonstrated enhanced viscosity and reduced crystallinity in the ternary blends.
POLYMER DEGRADATION AND STABILITY
(2021)
Article
Chemistry, Physical
Ji-Eun Lee, Jin-Woo Lee, Jae-Wang Ko, Kyung-Il Jo, Hyun-Ju Park, Ildoo Chung
Summary: The need for a resource circulation economy is emerging due to the development of eco-friendly industrial groups, especially in the plastics field. Recycling of thermoplastic elastomers without cross-link has rapidly developed the industry. The thermal and mechanical performances of TPEE blends were evaluated by manufacturing compounds and adding recycled resin and additives.
Article
Polymer Science
Yuliet Paez-Amieva, Jose Miguel Martin-Martinez
Summary: This study investigates the interactions between different polyols as a model for understanding the interactions between soft segments in PUs. Blends of polyester-PE and polycarbonate diol-CD with similar molecular weights were prepared and their structural, thermal, surface, viscoelastic, and self-adhesion properties were evaluated. Synergistic structural properties were observed in CD + PE blends, mainly attributed to the disruption of carbonate-carbonate interactions in CD and the formation of new ester-carbonate and hydroxyl-carbonate interactions. The different interactions between the polyol chains were evident in the surface properties of the blends, and all blends exhibited self-adhesion properties.
Article
Materials Science, Multidisciplinary
Ahmed Elmahdy, Navid Ghavanini, Aldobenedetto Zotti, Mauro Zarrelli, Anna Borriello, Patricia Verleysen
Summary: This study investigates the influence of AHBP nanofillers on the impact-dynamic properties of RTM6 epoxy, and finds that both strain rate and filler content significantly affect the energy absorption capacity, tensile strength, fracture strain, and toughness of the RTM6 epoxy.
Article
Chemistry, Physical
Przemyslaw Paczkowski, Andrzej Puszka, Barbara Gawdzik
Summary: This study compares the degradation process of unsaturated polyester resin (UPR) and vinyl ester resin (VER) and their biocomposites with kraft lignin. Different conditions lead to different degradation patterns, with VER resin showing higher chemical resistance. Immersion in NaOH initiates ester bond hydrolysis, particularly observed in pure resins.
Article
Polymer Science
Deyu Niu, Pengwu Xu, Zhaoyang Sun, Weijun Yang, Weifu Dong, Yang Ji, Tianxi Liu, Mingliang Du, Pieter Jan Lemstra, Piming Ma
Summary: This study investigates a two-step reactive melt blending method to improve the brittleness and melt strength issues of PGA bioplastic by using EMAG as a compatibilizer. The copolymers formed in the end locate selectively at the interface between PGA and PBAT, significantly enhancing the adhesion and compatibility.
Article
Polymer Science
Ting-Ting Zhang, Mei-Xi Zhou, Zhen-You Guo, You-Bo Zhao, Di Han, Hao Xiu, Hong-Wei Bai, Qin Zhang, Qiang Fu
Summary: This study investigates the control of selective distribution of silica nanoparticles with different specific surface areas in elastomer-toughened plastic blends. It was found that silica nanoparticles with low specific surface area tend to be located at the interface between the matrix and dispersed phase, leading to improved impact toughness while maintaining strength and modulus. The toughening efficiency also increases with the specific surface area of silica nanoparticles when interfacial distribution is the same.
CHINESE JOURNAL OF POLYMER SCIENCE
(2021)
Article
Polymer Science
Eduardo da Silva Barbosa Ferreira, Emanuel Pereira do Nascimento, Carlos Bruno Barreto Luna, Edson Antonio dos Santos Filho, Renate Maria Ramos Wellen, Edcleide Maria Araujo
Summary: Poly(lactic acid) is gaining popularity in academia and industry due to its biopolymer and biodegradable nature. However, its high fragility has led to efforts to find alternatives to improve this drawback.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Polymer Science
Hairul Abral, Angga Bahri Pratama, Dian Handayani, Melbi Mahardika, Ibtisamatul Aminah, Neny Sandrawati, Eni Sugiarti, Ahmad Novi Muslimin, S. M. Sapuan, R. A. Ilyas
Summary: By producing and characterizing a biocomposite of disintegrated bacterial cellulose nanofibers and tapioca starch/chitosan-based films, this work has developed an environmentally friendly edible packaging film with improved properties. The addition of BC nanofibers enhances tensile strength, thermal resistance, moisture resistance, and water vapor barrier of the film, while also exhibiting antibacterial activity. This biocomposite film shows great potential for applications in food packaging.
INTERNATIONAL JOURNAL OF POLYMER SCIENCE
(2021)
Article
Materials Science, Textiles
Edi Syafri, Sandra Melly, Irwan Anas, Angga Defrian, Sudirman Umar, Melbi Mahardika
Summary: The new natural fiber extracted from Agave gigantea leaf showed increased cellulose content, higher crystallinity, and superior thermal stability after alkali treatment, making it suitable as a reinforcement material for composite preparation.
JOURNAL OF NATURAL FIBERS
(2022)
Article
Biochemistry & Molecular Biology
Edi Syafri, Melbi Jamaluddin, Nasmi Herlina Sari, Melbi Mahardika, Putri Amanda, Rushdan Ahmad Ilyas
Summary: This study reports the production of nanocellulose from Agave gigantea fiber using chemical-ultrafine grinding treatment. The chemical treatment removed non-cellulose components, while ultrafine grinding reduced the size of cellulose microfibrils into nanocellulose. The nanocellulose can be applied as reinforcement in environmentally friendly polymer biocomposites.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2022)
Article
Materials Science, Textiles
Edi Syafri, Jamaluddin, Harmailis, Sudirman Umar, Melbi Mahardika, Devita Amelia, Reni Mayerni, Sanjay Mavinkere Rangappa, Suchart Siengchin, Tariq Rashad Sobahi, Anish Khan, Abdullah M. Asiri
Summary: This study successfully extracted cellulose from Pandanus tectorius fiber through chemical treatment and analyzed its effects on fiber properties. The results showed an increase in cellulose content, higher crystallinity, and improved thermal stability.
JOURNAL OF NATURAL FIBERS
(2022)
Article
Materials Science, Composites
Dieter Rahmadiawan, Hairul Abral, Wahyu Hidayat Yesa, Dian Handayani, Neny Sandrawati, Eni Sugiarti, Ahmad Novi Muslimin, S. M. Sapuan, R. A. Ilyas
Summary: This study prepared a PVA-based biocomposite film mixed with antimicrobial white ginger nanocellulose (GCNF) and zinc oxide (ZnO) nanoparticles. The film exhibited strong antimicrobial activity, high thermal resistance, and improved tensile strength and modulus compared to pure PVA film. It has great potential for fresh food packaging applications in industries.
JOURNAL OF COMPOSITES SCIENCE
(2022)
Article
Materials Science, Composites
Dieter Rahmadiawan, Hairul Abral, Razan Muhammad Railis, Ilham Chayri Iby, Melbi Mahardika, Dian Handayani, Khiky Dwi Natrana, Dian Juliadmi, Fazhar Akbar
Summary: In response to the increasing demand for food packaging materials that are safe for the environment and human health, researchers have developed a blended film by adding edible Uncaria gambir extract and boric acid into polyvinyl alcohol film. The resulting film exhibits antibacterial properties, UV-shielding ability, flexibility, and moisture and thermal resistance.
JOURNAL OF COMPOSITES SCIENCE
(2022)
Article
Materials Science, Textiles
Edi Syafri, Jamaluddin Jamaluddin, Nasmi Herlina Sari, Melbi Mahardika, Lisman Suryanegara, Rafles Sinaga, Ferriawan Yudhanto, Rahadian Zainul, Agus Nugroho, Anish Khan, Mohammad A. Wazzan
Summary: This study aims to assess the effect of ultrafine grinding and ultrasonication treatment on the bio-composite characteristics of PVA/AG-CMF film. The results showed that the treatment increased the tensile strength by 43% and improved the thermal stability of the film. Statistical analysis confirmed the significant influence of the treatment on the studied parameters.
JOURNAL OF NATURAL FIBERS
(2023)
Article
Computer Science, Information Systems
Syukri Yunus, Abel Yusman, Melbi Mahardika, Hairul Abral, Refdinal Nazir
Summary: This research has discovered a new method to enhance the conductivity of bacterial cellulose BC/Ppy bio composite films by immersing a wet BC film in liquid Ppy semiconductor during pulling. The results showed that the conductivity of the films improved significantly in the pulling direction, with a 153% increase compared to the non-pulled film (σ = 19.2 x 10-3 S/cm). The conductivity of the films can still be further improved due to deformation during wet sample preparation.
TEM JOURNAL-TECHNOLOGY EDUCATION MANAGEMENT INFORMATICS
(2023)
Article
Biochemistry & Molecular Biology
Nelga Autha, Febriana Esza Dewi Siregar, Melbi Harmiansyah, Melbi Mahardika, Eka Nurfani
Summary: This study analyzes the tensile strength, biodegradability, moisture absorption, and thermal stability of Thai cassava starch-based bioplastics. The study demonstrates the influence of different ratios of starch and cellulose on the properties of the bioplastics. The results show the potential of these bioplastics in reducing plastic waste.
Article
Materials Science, Paper & Wood
Rudi Dungani, Lili Melani, Widya Fatriasari, Sasa Sofyan Munawar, Firda Aulya Syamani, Melbi Mahardika, Tati Karliati, Mustika Dewi, Wahyu Supriyati
Summary: Cellulose nanocrystals (CNC) were prepared from delignified kenaf bast fiber through alkaline pulping, hydrogen peroxide bleaching, and acid hydrolysis treatment. The size and morphology of the fibers were characterized by scanning electron microscopy (SEM), and the isolated fibers had a diameter between 9 to 30 pm. Fourier transform infrared (FTIR) spectroscopy showed a decrease in lignin content during the pulping process, with complete removal of lignin during hydrogen peroxide bleaching. X-ray diffraction (XRD) analysis revealed an increase in fiber crystallinity at each stage of the process. Atomic force microscopy (AFM) indicated that the isolated pulp nanofibers had diameters of approximately 30 nm.
Article
Chemistry, Multidisciplinary
Agus Wedi Pratama, Tri Mulyono, Bambang Piluharto, Nurul Widiastuti, Melbi Mahardika, Badrut Tamam Ibnu Ali, Dalia Allouss, Ilias El Alaoui-Elbalrhiti
Summary: This study investigated the production of bioethanol through the fermentation of immobilized yeast cells in alginate/cellulose beads. The effects of alginate/cellulose ratios on bioethanol yield, concentration, microbial leaching, and surface matrix morphology were examined. The results showed that the addition of cellulose enhanced the fermentation rate and increased bioethanol concentration.
JOURNAL OF THE INDIAN CHEMICAL SOCIETY
(2023)
Article
Pharmacology & Pharmacy
Dian Handayani, Ibtisamatul Aminah, Purnawan Pontana Putra, Andani Eka Putra, Dayar Arbain, Herland Satriawan, Mai Efdi, Ismail Celik, Trina Ekawati Tallei
Summary: This study explored the antibacterial potential of three depsidone compounds derived from the marine sponge-derived fungus Aspergillus unguis IB1 against MRSA. The compounds exhibited good antibacterial activity and showed interaction with the penicillin-binding protein 2a (PBP2a) and affected bacterial morphology. They also demonstrated favorable pharmacokinetic properties and could be developed as antibiotic adjuvants to reduce antimicrobial resistance.
SAUDI PHARMACEUTICAL JOURNAL
(2023)
Proceedings Paper
Materials Science, Multidisciplinary
Devita Amelia, Eva Fathul Karamah, Melbi Mahardika, Edi Syafri, Sanjay Mavinkere Rangappa, Suchart Siengchin, Mochammad Asrofi
Summary: Microplastic pollution in aquatic systems is a global concern. AOPs, such as ozonation and hydrogen peroxide, can generate reactive oxygen species and modify the chemical structure of microplastics, thus accelerating their degradation. This study focused on modifying the chemical structure of polyethylene microplastics using AOPs and analyzed the effects using FTIR analysis.
MATERIALS TODAY-PROCEEDINGS
(2022)
