Article
Polymer Science
Zongwei Guo, Zice Xu, Zhiqiang Dong, Mengjie Zhang, Zhiyuan Chi, Ming Li, Lei Shang, Yuhui Ao
Summary: This study introduces a novel hexa-epoxy functionalized bio-based epoxy resin (HPVIGEP) with a multi-arm star structure that significantly reduces viscosity and enhances thermo-mechanical properties. The application of this resin improves the mechanical properties of carbon fiber composites.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Polymer Science
Jing Feng, Sujuan Li, Ruqun Peng, Tingli Sun, Xiaobao Xie, Qingshan Shi
Summary: The study found that different wood species had varying effects on fungal resistance of wood polypropylene composites, with Chinese fir and rubber wood-filled composites showing the highest and lowest durability against specific fungi. Fungal decay also led to significant differences in mechanical, chemical, and water absorption properties between non-decayed and decayed composites, resulting in lower strength and higher water absorption in decayed samples.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Polymer Science
Raissa Carvalho Martins, Simone Pereira da Silva Ribeiro, Regina Sandra Veiga Nascimento, Marco Antonio Chaer Nascimento, Marcos Batistella, Jose-Marie Lopez-Cuesta
Summary: This study investigated the effect of different concentrations of an intumescent formulation and montmorillonite on the fire behavior of polylactic acid composites. The results showed that the addition of the intumescent formulation and montmorillonite improved the fire-retardant performance of the composites, with the highest AP concentration (17%) and the lowest ANa concentration (1.2%) achieving the best result.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Polymer Science
Liana Stoll, Sandra Domenek, Simone Hickmann Flores, Sonia Marli B. Nachtigall, Alessandro de Oliveira Rios
Summary: Packaging materials play a crucial role in preserving the quality and nutritional value of food, and utilizing Bixin has improved the light barrier of PLA packaging films, making it a promising biodegradable packaging material.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Polymer Science
Noor Izyan Syazana Mohd Yusoff, Weng Hong Tham, Mat Uzir Wahit, Mohammed Rafiq Abdul Kadir, Tuck-Whye Wong
Summary: Biodegradable poly(sorbitol sebacate malate)/hydroxyapatite composites were synthesized through one-step polycondensation, and the addition of hydroxyapatite improved the mechanical properties of the materials. In vitro degradation and cytotoxicity tests showed good degradation performance and biocompatibility of the composites.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Polymer Science
Joseph S. Terry, Ambrose C. Taylor
Summary: Manufacturers are considering bio-based alternatives to petroleum-derived epoxies due to environmental concerns, but a lack of information hinders this substitution. Commercially available bio-based epoxy systems are being compared, with high bio-based content resins used for vacuum infusion composites, showing promising mechanical properties comparable to conventional epoxies.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Polymer Science
Joemer Adorna, Ruby Lynn Ventura, Van Dien Dang, Ruey-An Doong, Jey-R S. Ventura
Summary: The study incorporated cheap fillers such as cellulose and calcium carbonate into PHB to reduce manufacturing costs while retaining properties; the self- and co-agglomeration of fillers impact the miscibility and performance of the material.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Polymer Science
Xin Chen, Gangliang Huang
Summary: Garlic polysaccharide (PS) was extracted from garlic using hot-water extraction, and acetylated garlic polysaccharide (AcPS) and garlic polysaccharide-zinc complex (ZnPS) were synthesized. The modifications successfully enhanced the antioxidant activities, with AcPS and ZnPS showing stronger scavenging abilities on hydroxyl and superoxide anion radicals compared to PS. AcPS also exhibited significantly stronger inhibitory effect on lipid peroxidation, indicating its potential as an antioxidant.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Polymer Science
Seung Bin Park, Young Jun Lee, Kang Hee Ku, Bumjoon J. Kim
Summary: A new type of compatibilizer PLA-g-[MAH/TAIC] is developed to significantly improve the mechanical properties of PLA/talc composites, enhancing the elongation at break and Izod impact strength.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Polymer Science
Wenjie Du, Jinxu Fan, Rui Ma, Gang Yang, Jiaqi Liu, Shifan Zhang, Tao Chen
Summary: A novel chitosan-based double network hydrogel was synthesized and applied as an efficient adsorbent to remove methylene blue. The hydrogel exhibited high strength, good adsorption properties, and a large specific surface area with developed pore structure. The adsorption process was influenced by pH, temperature, and adsorbent dose, fitting well with pseudo-second-order kinetic model and Langmuir isotherm.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Polymer Science
Alana G. de Souza, Rafaela R. Ferreira, Julio Harada, Derval S. Rosa
Summary: This study developed biodegradable PBAT/PLA composites with different fillers to enhance their physicochemical properties and biodegradability. The composites showed high tensile strength, good thermal performance and low water absorption, making them suitable as mulching films for lettuce crops. Biodegradation and ecotoxicity tests indicated that the developed films are environmentally friendly and beneficial for crop growth.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Polymer Science
Pablo R. Salgado, David A. D'Amico, Irene T. Seoane, Magdalena Iglesias Montes, Adriana N. Mauri, Viviana P. Cyras
Summary: By studying the preparation of bilayer films using the lowest possible concentration of polyhydroxybutyrate, the functionality of soy protein isolate films as food packaging or for agricultural uses was improved by reducing water vapor permeability. The bilayer films showed significant reduction of water vapor permeability of SPI films, and those with the highest PHB content exhibited the highest elastic Young's modulus and mechanical strength while maintaining good elongation and low T(g) value, similar to that of SPI.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Polymer Science
Ishita Chakraborty, N. Pooja, Soumyabrata Banik, Indira Govindaraju, Kuheli Das, Sib Sankar Mal, Guan-Yu Zhuo, Muzamil Ahmad Rather, Manabendra Mandal, Ashamoni Neog, Rajib Biswas, Vishwanath Managuli, Amitabha Datta, Krishna Kishore Mahato, Nirmal Mazumder
Summary: Replacing environmentally hazardous petroleum-based plastics with sustainable and efficient starch-based bioplastics is urgently needed. This research developed bioplastics from a blend of starch from rice and potato, crosslinked with citric acid, and investigated its physicochemical and functional properties.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Polymer Science
Victor Ferrao, Giovanni Bortoloni Perin, Maria Isabel Felisberti
Summary: In this work, PHBV composites were prepared using TEC as a biodegradable plasticizer and SBF as reinforcement via melting extrusion. TEC reduced the viscosity and thermomechanical degradation of PHBV, while SBF acted as a nucleation agent for PHBV crystallization and enhanced the tensile properties of the matrix. TEC and SBF had antagonistic effects on the properties of the composites, providing opportunities for property tuning by varying the composition.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Polymer Science
Guoqiang Wang, Jiaqi Song
Summary: The two bio-based polyesters exhibit higher glass transition temperature and melting temperature, with PDN showing higher tensile strength but lower elongation at break, and its complex viscosity being more sensitive to temperature and oscillation frequency.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Chemistry, Physical
Seyed Mohammad Sajadi, Shayan Enayat, Livia Vasarhelyi, Alessandro Alabastri, Minghe Lou, Lucas M. Sassi, Alex Kutana, Sanjit Bhowmick, Christian Durante, Akos Kukovecz, Anand B. Puthirath, Zoltan Konya, Robert Vajtai, Peter Boul, Chandra Sekhar Tiwary, Muhammad M. Rahman, Pulickel M. Ajayan
Summary: Commercial graphite powder was used to develop colloidal ink for 3D printing at room temperature, enabling the fabrication of complex graphitic structures with the addition of a small amount of clay to ensure strong binding between graphite layers. This method allows for easy shape engineering and maintains excellent thermal, electrical, and mechanical properties of the printed structures.
Article
Chemistry, Physical
Dongyang Zhu, Zhuqing Zhang, Lawrence B. Alemany, Yilin Li, Njideka Nnorom, Morgan Barnes, Safiya Khalil, Muhammad M. Rahman, Pulickel M. Ajayan, Rafael Verduzco
Summary: Transition metal nitrates can catalyze the rapid synthesis of COFs, especially for imine COFs, under ambient conditions. By optimizing the catalyst loading and selecting appropriate transition metal nitrates, highly crystalline COF products can be obtained in a short period of time.
CHEMISTRY OF MATERIALS
(2021)
Review
Chemistry, Multidisciplinary
Dongyang Zhu, Guiyin Xu, Morgan Barnes, Yilin Li, Chia-Ping Tseng, Zhuqing Zhang, Jun-Jie Zhang, Yifan Zhu, Safiya Khalil, Muhammad M. Rahman, Rafael Verduzco, Pulickel M. Ajayan
Summary: COFs have emerged as a new class of porous materials constructed by organic building blocks via dynamic covalent bonds, which have been extensively explored as potentially superior candidates for electrode materials. Significant progress has been made in utilizing COFs for various battery applications, with particular attention to the structure and chemistry of COFs and novel strategies to enhance battery performance. Challenges, solutions, and future research directions on COFs for batteries have been discussed, laying the groundwork for future advances in this exciting material class.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Chemistry, Physical
Yifan Zhu, Dongyang Zhu, Qianqian Yan, Guanhui Gao, Jianan Xu, Yifeng Liu, Sampath B. Alahakoon, Muhammad M. Rahman, Pulickel M. Ajayan, Eilaf Egap, Rafael Verduzco
Summary: The study introduces a one-pot synthesis method for COFs using a variety of metal oxides as catalysts to synthesize highly crystalline and porous COFs. It confirms that these metal oxides can effectively catalyze the synthesis of imine COFs.
CHEMISTRY OF MATERIALS
(2021)
Article
Chemistry, Physical
Dongyang Zhu, Yifan Zhu, Qianqian Yan, Morgan Barnes, Fangxin Liu, Pingfeng Yu, Chia-Ping Tseng, Nicholas Tjahjono, Po-Chun Huang, Muhammad M. Rahman, Eilaf Egap, Pulickel M. Ajayan, Rafael Verduzco
Summary: The study presents a simple and versatile approach for the fabrication of pure macroscopic, crystalline, and porous COF aerogels without any binders or additives. Testing six different COFs revealed that the crystallinities and porosities of the COF aerogels matched those of COF powders, suggesting potential adsorption and capture properties.
CHEMISTRY OF MATERIALS
(2021)
Article
Chemistry, Physical
Dongyang Zhu, Zhiqi Hu, Tanya K. Rogers, Morgan Barnes, Chia-Ping Tseng, Hao Mei, Lucas M. Sassi, Zhuqing Zhang, Muhammad M. Rahman, Pulickel M. Ajayan, Rafael Verduzco
Summary: This study introduces a novel method for patterning, transferring, and measuring the tensile properties of free-floating nanoscale COF films. The tensile tests of TAPB-PDA COF resulted in a modulus of approximately 1.4 GPa and a fracture strain of 2.5%, demonstrating the potential of COFs for thin-film applications.
CHEMISTRY OF MATERIALS
(2021)
Review
Green & Sustainable Science & Technology
Pranjal Ghosal, Bramha Gupta, Rushikesh S. Ambekar, Muhammad M. Rahman, Pulickel M. Ajayan, Nirupam Aich, Ashok Kumar Gupta, Chandra Sekhar Tiwary
Summary: As the global population grows and water quality becomes a critical issue, water treatment technologies are evolving to address the challenges. 3D printing technology shows great potential for enhancing water treatment efficiency by creating materials with tailored properties.
ADVANCED SUSTAINABLE SYSTEMS
(2022)
Review
Chemistry, Multidisciplinary
M. A. S. R. Saadi, Alianna Maguire, Neethu T. Pottackal, Md Shajedul Hoque Thakur, Maruf Md Ikram, A. John Hart, Pulickel M. Ajayan, Muhammad M. Rahman
Summary: Direct ink writing (DIW) is a versatile 3D printing technique that allows printing of a wide range of materials. This comprehensive review explores the process of DIW printing of complex 3D structures and discusses its diverse applications in various industries.
ADVANCED MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Bhuvan Vemuri, Govinda Chilkoor, Pramod Dhungana, Jamil Islam, Aravind Baride, Nikhil Koratkar, Pulickel M. Ajayan, Muhammad M. Rahman, James D. Hoefelmeyer, Venkataramana Gadhamshetty
Summary: Operating MFCs under extreme pH conditions is challenging, but a pH-universal ORR ink based on hollow nanospheres of manganese oxide (h-Mn3O4) anchored with multiwalled carbon nanotubes (MWCNTs) shows remarkable activity and stability in both acidic and alkaline conditions.
Article
Chemistry, Multidisciplinary
Jamil Islam, Parthiba Karthikeyan Obulisamy, Venkata K. K. Upadhyayula, Alan B. Dalton, Pulickel M. Ajayan, Muhammad M. Rahman, Manoj Tripathi, Rajesh Kumar Sani, Venkataramana Gadhamshetty
Summary: In this study, the use of graphene layers on copper surfaces for microbially driven methanol dehydrogenation to generate DC electricity was investigated. The results showed that the graphene layers significantly improved the power density and current density. This catalyst-free approach has important implications for enhancing the sustainability of fuel cell technologies.
Article
Engineering, Mechanical
Sudheendra Herkal, Muhammad M. Rahman, Satish Nagarajaiah, Vijay Vedhan Jayanthi Harikrishnan, Pulickel Ajayan
Summary: Schwarzites are 3D solids with negative Gaussian curvatures that possess unique mechanical properties such as high ductility and strength. The energy dissipation mechanism of Schwarzites allows for the removal of energy from dynamic systems and reduction of system response. Experimental results show that Schwarzite geometry can increase the damping ratio by almost 80% with the same material volume as a solid support. Additionally, Schwarzites exhibit vibration isolation properties.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2023)
Article
Chemistry, Multidisciplinary
Md Abdullah Al Bari, Shariful Kibria Nabil, Shabab Saad, Rahul Sarkar, Sabrina Sabiha, Muhammad M. M. Rahman, Md Golam Kibria
Summary: There is growing interest in using carbon fibers in various applications due to their excellent mechanical, electrical, and thermal properties. Recent studies have identified asphaltene as a promising low-cost precursor for carbon fiber production, potentially accelerating its adoption. Techno-economic and life cycle assessments show that asphaltene-derived carbon fiber production can be cost-effective and offer climate benefits compared to current precursors.
Article
Materials Science, Multidisciplinary
Dongyang Zhu, Qianqian Yan, Yifan Zhu, Xinbo Tong, Alec Ajnsztajn, Muhammad M. Rahman, Pulickel M. Ajayan, Rafael Verduzco
Summary: This study demonstrates that the degree of pore collapse in nanoporous materials COFs can be precisely controlled by using a mixture of high and low surface tension solvents. The study also reveals that pore collapse is an irreversible process, and solvent surface tension is the most important characteristic that governs pore collapse.
ACS MATERIALS LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Dongyang Zhu, Jun-Jie Zhang, Xiaowei Wu, Qianqian Yan, Fangxin Liu, Yifan Zhu, Xiaodong Gao, Muhammad M. Rahman, Boris Yakobson, Pulickel M. Ajayan, Rafael Verduzco
Summary: The activation stability of covalent organic frameworks (COFs) is crucial for their crystallinity and porosity, but current understanding is limited. This study presents a versatile experimental approach to quantify the activation stability of COFs and demonstrates how it can be systematically tuned using a multivariate synthesis approach. The findings provide novel insights into COF stability and offer guidance for designing more robust COFs.
Article
Chemistry, Multidisciplinary
Muflih A. Adnan, M. A. Khan, Pulickel M. Ajayan, Muhammad M. Rahman, Jinguang Hu, Md Golam Kibria
Summary: The race to decarbonize energy systems has led to technological advancements, with a focus on capturing CO2 from air and converting it into valuable fuels and chemicals. Two transition pathways for sustainable production of methanol were assessed, showing economic viability in jurisdictions with low-cost grid electricity. Technical improvements and cost reductions are necessary for these envisioned air-to-fuel routes to be competitive.
