Article
Polymer Science
Alejandra Ortega, Silvia Valencia, Ernesto Rivera, Tania Segura, Guillermina Burillo
Summary: In this paper, the synthesis of acrylamide hydrogels reinforced with cellulose nanocrystals using gamma radiation was reported. The cellulose nanocrystals had a notable influence over the swelling and mechanical properties, resulting in a more rigid material. The reinforced hydrogels showed the ability to load large amounts of ciprofloxacin, but released the drug quickly.
Article
Polymer Science
Jang-Gun Lee, Jin-Oh Jeong, Sung-In Jeong, Jong-Seok Park
Summary: Crosslinking of polyolefin-based polymers can improve their thermal and mechanical properties, and polymer blending can further enhance these properties, making the material suitable for various applications. In this study, HDPE/EVA/PU blends were prepared by radiation crosslinking to improve the thermal and mechanical properties of HDPE, demonstrating better thermal stability, strength, and abrasion resistance than non-crosslinked HDPE.
Article
Polymer Science
Peerapat Thongnuek, Sorada Kanokpanont, Pimpon Uttayarat, Siriporn Damrongsakkul
Summary: Gamma irradiation was used to induce the hydrogelation of silk fibroin, and the characteristics of the irradiation-induced hydrogels were investigated. The irradiation-induced hydrogels exhibited better thermal stability and contained more random coil structures and fewer beta-sheet structures. This finding suggests that the gelation mechanism induced by gamma irradiation may differ from the established mechanism. The study also demonstrates that gamma irradiation can be used as an alternative method to produce chemical-free, random coil-rich, and sterilized silk fibroin hydrogels for biomedical applications.
Review
Engineering, Electrical & Electronic
Sajid Ahmad, Raheel Hammad, Seemin Rubab
Summary: This review highlights the importance of gamma radiation in the synthesis of polyaniline (PANI)-based nanoparticles and nanocomposites. PANI is valuable for its conductivity and easy synthesis in various applications. Gamma radiation treatment can produce pure PANI nanoparticles without the need for chemicals or catalysts. Additionally, gamma irradiation is a useful technique for simultaneously creating various in situ nanocomposites during radiation treatment.
JOURNAL OF ELECTRONIC MATERIALS
(2022)
Article
Pharmacology & Pharmacy
Atsushi Kimura, Tadashi Arai, Miho Ueno, Kotaro Oyama, Hao Yu, Shinichi Yamashita, Yudai Otome, Mitsumasa Taguchi
Summary: Nanoparticle-based drug delivery systems have been developed as effective imaging agents for pancreatic cancer. Peptides composed of histidine and glycine were synthesized and irradiated with gamma-rays to produce peptide nanogels. These nanogels exhibited smaller size, high formation yield, stability, and biodegradability, making them effective nano-imaging agents for intractable cancers such as pancreatic cancer.
Article
Chemistry, Physical
Jinshun Zhao, Chun Li, Jiayang Sui, Shuai Jiang, Weizhen Zhao, Shihao Zhang, Rong Wu, Jintong Li, Xuhuang Chen
Summary: In this work, a simple, fast, and efficient strategy to fabricate high-performance rigid crosslinked PVC composites by continuous extrusion is proposed for the first time. This strategy solves the problems of poor processing fluidity of composites and the impossibility of conducting extrusion in one step by using microcapsule-type crosslinking agents prepared by in situ polymerization to co-extrude with PVC blends. The results demonstrate successful preparation of PVC/microcapsule composites, with improved properties of crosslinked PVC by the addition of microcapsules, including an increased Vicat softening temperature from 79.3°C to 86.2°C compared to pure PVC. This study shows the possibility for industrial scale-up of the extrusion process for rigid crosslinked PVC.
Review
Chemistry, Multidisciplinary
Amol Tarachand Naikwadi, Bhuwanesh Kumar Sharma, Keyur D. Bhatt, Prakash A. Mahanwar
Summary: High energy radiation processing is an effective technique to enhance the properties of polymers. This review focuses on the development and modification of polymeric multi component systems using controlled high energy radiations. It also compares the effects of gamma and electron beam radiation on property development.
FRONTIERS IN CHEMISTRY
(2022)
Article
Polymer Science
Zijin Wu, Yonggang Shangguan, Chunhui Zhang, Qiang Zheng
Summary: The addition of DCP and KH570 can significantly improve the tensile shear strength of the hot melt adhesive, while the addition of silane coupling agents with different functional groups has minimal impact on the performance. However, excessive silane coupling agent may reduce the tensile strength and shear peel strength of the material.
Article
Materials Science, Composites
Niexin Li, Donglei Fan, Zhiyuan Shi, Yuzhong Xie, Minggang Li, Tao Tang
Summary: The study prepared EVA/ZnO composites with reversible ion-crosslinking structure by the reaction of zinc oxide and maleic anhydride group, which is beneficial for improving the quality of foams. An appropriate degree of ion crosslinking can increase the foam's expansion rate and cell density, reduce cell diameter, and compression set.
COMPOSITES COMMUNICATIONS
(2021)
Article
Chemistry, Analytical
Mohamed Ragab Abass, Asmaa Bendary Ibrahim, Eman Hassan EL-Masry, Mamdouh Mohamed Abou-Mesalam
Summary: Gamma radiation was used to produce PAN/BC nanocomposites, and their structural morphology, functional groups, and chemical structures were characterized using various analysis methods. The affinity of Cs+, Co2+, Cu2+, & Zn2+ onto the materials increased with higher radiation doses. Optical characteristics of PAN/BC nanocomposites prepared at 60 kGy showed an enrichment of the bandgap after saturation by ions.
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
(2021)
Article
Chemistry, Physical
Sandeep Kumar, Alka Tiwari, C. Chaudhari, Y. K. Bhardwaj
Summary: High energy Co-60 gamma radiation was used to graft cationic and anionic monomers onto radiation crosslinked chitosan through mutual radiation grafting technique. The absorbed dose for synthesizing adsorbent of good strength and adsorption capacity was monomer specific. The grafting extent increased with the increase in radiation dose, dose rate and monomer concentration, while a decrease in grafting extent was observed with the increase in crosslinking density of chitosan backbone. The grafted products were characterized for water uptake capacity, surface morphology, thermal stability and elemental analysis by SEM, TGA and EDXA respectively.
RADIATION PHYSICS AND CHEMISTRY
(2021)
Article
Biochemistry & Molecular Biology
M. I. A. Abdel Maksoud, Mohamad Bekhit, Dina M. El-Sherif, Ahmed R. Sofy, Mahmoud R. Sofy
Summary: The novel chitosan/silver/Mn0.5Mg0.5Fe2O4 nanocomposite synthesized with gamma irradiation assistant showed promising results in reducing the negative effects of Cd stress on cabbage plants by decreasing Cd content in leaves, enhancing antioxidant and non-antioxidant enzyme activities, and promoting plant growth.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2022)
Article
Polymer Science
Jun Zhong, Xinyue Zhang, Xiaofeng Yu, Xuanyu Shi, Shihao Sun, Li Yang, Min Zuo, Yihu Song, Qiang Zheng
Summary: The selective distribution of silica nanoparticles grafted with crosslinked PMMA in PMMA/SAN blend was studied. Highly crosslinked PMMA chains mainly located in the PMMA-rich domains, while linear PMMA chains mainly located at the blend matrix interface. NPs grafted with slightly crosslinked chains were partially located at the interface and partially in the PMMA-rich domains. The deviation between theoretical prediction and actual location of modified NPs may be related to the heterogeneity of miniemulsion polymerization. The different locations of modified NPs induced by different grafted chain structures can result in various compatibilization effects on PMMA/SAN blend.
Article
Chemistry, Multidisciplinary
Zihua Zeng, Shuangxiao Li, Xueyan Que, Jing Peng, Jiuqiang Li, Maolin Zhai
Summary: In this study, Ag/P25 nanocomposites were synthesized using a one-step gamma-ray radiation method, and their properties were characterized. The results showed that the synthesis method can effectively control the particle size of Ag nanoparticles, leading to improved photocatalytic activity. This study provides new insight into the future development of highly efficient photocatalysts using radiation techniques.
Article
Engineering, Chemical
Giacomo Morselli, Marco Villa, Paola Ceroni, Luca Medici, Fabio Tarlazzi, Stefano Dossi, Pietro Matteucci, Andrea Galanti, Andrea Magri
Summary: Photocrosslinking of polymers for industrial applications has advantages in terms of mild conditions and economical equipment. However, issues such as the use of mercury lamps as light sources and the presence of powdered materials as additives pose concerns. This study explores the UV-curing of an innovative EVA-POE blend containing hydrotalcite and aluminum hydroxide as flame-retardant fillers using a 370-nm UV LED. The results show a higher cross-linked content compared to pure EVA and LDPE, even with the presence of light scattering mineral fillers at high concentration.
POLYMER ENGINEERING AND SCIENCE
(2023)
Article
Chemistry, Inorganic & Nuclear
S. K. Suman, K. A. Dubey, B. B. Mishra, Y. K. Bhardwaj, R. K. Mondal, Murali Seshadri, V. Natarajan, L. Varshney
APPLIED RADIATION AND ISOTOPES
(2015)
Article
Engineering, Electrical & Electronic
K. A. Dubey, R. K. Mondal, V. Grover, Y. K. Bhardwaj, A. K. Tyagi
SENSORS AND ACTUATORS A-PHYSICAL
(2015)
Article
Chemistry, Physical
R. K. Mondal, K. A. Dubey, Y. K. Bhardwaj, L. Varshney
Article
Polymer Science
Kumar Abhinav Dubey, Pulya Umamaheswara Sastry, Jitendra Kumar, Raj Kumar Mondal, Vaisyappattu Balakrishnan Jayakrishnan, Jose Savio Melo, Yatinder Kumar Bhardwaj, Lalit Varshney
JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS
(2018)
Article
Chemistry, Analytical
R. K. Mondal, Jitendra Kumar, K. A. Dubey, Y. K. Bhardwaj, J. S. Melo, L. Varshney
SENSORS AND ACTUATORS B-CHEMICAL
(2018)
Article
Polymer Science
S. Majji, K. A. Dubey, R. K. Mondal, Y. K. Bhardwaj, S. Acharya
POLYMER-PLASTICS TECHNOLOGY AND ENGINEERING
(2014)
Article
Polymer Science
K. A. Dubey, S. K. Sinha, Y. K. Bhardwaj, L. Panicker, L. Varshney
POLYMER-PLASTICS TECHNOLOGY AND ENGINEERING
(2014)
Article
Chemistry, Multidisciplinary
Anshu Singhal, K. A. Dubey, Y. K. Bhardwaj, Dheeraj Jain, Sipra Choudhury, A. K. Tyagi
Article
Engineering, Environmental
K. A. Dubey, R. K. Mondal, Jitendra Kumar, J. S. Melo, Y. K. Bhardwaj
CHEMICAL ENGINEERING JOURNAL
(2020)
Review
Materials Science, Composites
Raj Kumar Mondal, Kumar Abhinav Dubey, Yatender Kumar Bhardwaj
Summary: Conductive polymer nanocomposites (CPC) are highly versatile materials with applications in sensors, electrolyte membranes, photovoltaic cells, electromagnetic interference shielding materials, and more. The key to their electrical conductivity lies in the interface between the polymer and conductive filler, with electron tunneling and hopping playing a crucial role. Primarily focusing on carbonaceous nanoparticles, this review article highlights the importance of improving the interface between filler and polymers in CPC through various methodologies and interface modification techniques.
POLYMER COMPOSITES
(2021)
Article
Materials Science, Multidisciplinary
R. K. Mondal, K. A. Dubey, S. Bhanu Prakash, Jitendra Kumar, J. S. Melo, Y. K. Bhardwaj
Summary: The development of carbon nanotube-based electromechanical sensors with excellent sensing range and gauge factor is reported. The study found that the ratio of ethylene (E) and vinyl acetate (VAc) significantly impacts the AC impedance, electron tunneling, CNT-CNT structural breakdown, effective aspect ratio, and electromechanical behavior. As the VAc content increases, the electrical conductivity decreases, but the electromechanical response improves significantly.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2021)
Article
Polymer Science
Su Su Kyaw, C. V. Chaudhari, Priya Maheshwari, Kumar Abhinav Dubey, Y. K. Bhardwaj
Summary: This study finds that specific doses of gamma radiation can significantly improve the compatibility of nitrile butadiene rubber (NBR) with biodiesel. Radiation processing constrains the relaxation dynamics of NBR chains and improves its compatibility. This research contributes to the development of efficient fuel-compatible NBR-based components.
JOURNAL OF POLYMER RESEARCH
(2023)
Article
Materials Science, Composites
S. K. Suman, R. Sharma, B. N. Kaul, R. K. Mondal, K. A. Dubey, S. D. Sharma, Y. K. Bhardwaj, M. S. Kulkarni
Summary: A high loading of high-density and high-atomic-number fillers in radiation shields is necessary for desirable X-ray attenuation characteristics. However, this high loading severely impairs the mechanical and viscoelastic properties of polymers, poses a long-term threat to the mechanical integrity and radiation protection, and may increase the shield temperature after prolonged exposure to ionizing radiation. Inadequate thermal conduction can also make the user uncomfortable. This study developed SBS-tungsten composites and found that the concentration of styrene in the SBS and W loading significantly affected the attenuation, mechanical and rheological properties, and thermal conductivity of the composites.
POLYMER COMPOSITES
(2023)
Article
Materials Science, Multidisciplinary
Nitika Parashar, Kirti Sachdeva, C. Chaudhari, Bhanu S. Prakash, Haripada Bhunia, Jitendra Kumar, K. A. Dubey, J. S. Melo, Y. K. Bhardwaj
ACS APPLIED POLYMER MATERIALS
(2020)
Article
Nanoscience & Nanotechnology
R. K. Mondal, K. A. Dubey, Jitendra Kumar, Jagannath, Y. K. Bhardwaj, J. S. Melo, L. Varshney
ACS APPLIED NANO MATERIALS
(2018)
