Article
Chemistry, Applied
Maryam Lotfi, Hossein Yari, Morteza Ganjaee Sari, Alireza Azizi
Summary: This study aimed to enhance the mechanical attributes, especially toughness, of epoxy systems using surface-treated graphene oxide nanosheets. Through a series of modifications with APTES and HBP, it was found that 1 wt% graphene oxide treated with both showed the highest enhancement in toughness and hardness. Structural studies revealed that the simultaneous reinforcement of physical and chemical aspects contributed to the improved properties of the epoxy network.
PROGRESS IN ORGANIC COATINGS
(2022)
Article
Chemistry, Physical
Xue Liang, Xiaojie Li, Yong Tang, Xiyu Zhang, Wei Wei, Xiaoya Liu
Summary: In this study, graphene oxide (GO) sheets were covalently linked with hyperbranched epoxy resin to enhance the properties of epoxy composites. The functionalized GO sheets showed better dispersion and interfacial compatibility, leading to significant improvements in mechanical and thermal properties. The results suggest that the functionalized composite is a promising, all-purpose modifier for epoxy resins.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Materials Science, Composites
Yalin Zhao, Zhixiong Wu, Shibin Guo, Zhengrong Zhou, Zhicong Miao, Shiyong Xie, Rongjin Huang, Laifeng Li
Summary: The HPB-GO nanocomposite prepared by grafting hyperbranched polymer exhibits excellent mechanical and thermal properties, improving the application performance of epoxy resin.
COMPOSITES SCIENCE AND TECHNOLOGY
(2022)
Article
Engineering, Multidisciplinary
Amit Chanda, Sujeet K. Sinha, Naresh Datla
Summary: This study investigated the effect of carbon nanofiber (CNF) alignment on the mixed mode fracture toughness of CNF/epoxy nanocomposite adhesive joints. The results showed that aligned CNF/epoxy had significantly improved fracture toughness in mixed mode and mode-II compared to neat epoxy. Fracture surface analysis revealed that CNF pull-out, debonding, and plastic void growth of epoxy were the key toughening mechanisms.
COMPOSITES PART B-ENGINEERING
(2022)
Article
Construction & Building Technology
Peijun Xu, Xiaoming Du, Peiliang Cong, Zhenjun Zhou
Summary: In this study, the modification of hydroxyl-terminated hyperbranched polyester (HBP) to epoxy-terminated HBP successfully improved the toughness of epoxy asphalt at low temperature. Epoxy-terminated HBP exhibited good compatibility with epoxy resin and could still enhance the toughness of epoxy asphalt through its hyperbranched structure.
ROAD MATERIALS AND PAVEMENT DESIGN
(2022)
Article
Materials Science, Composites
Zhongzhou Zhang, Qichen Yin, Yuhong Liu
Summary: Despite its many merits, the practical application of epoxy (EP) is significantly hindered by its intrinsic flammability. Intercalation-functionalized graphene oxide (GO) has shown excellent performance in flame retardancy studies, but the effect of layer spacing on the flame retardant performance of polymers is still lacking. Three GO flame retardants with different layer spacing were prepared and evaluated for flame retarding EP composites. The results showed that the layer spacing of GO significantly affects the flame retardancy of the composite by influencing the formation of a protective char layer.
POLYMER COMPOSITES
(2023)
Article
Chemistry, Applied
Wanan Cai, Zhigang Yuan, Zhicheng Wang, Zhiyi Guo, Lili Zhang, Jun Wang, Wenbin Liu, Tao Tang
Summary: A novel hyperbranched benzoxazine (HB-PED230) was synthesized and found to have significant plasticizing effect on epoxy resin, reducing its brittleness and improving toughness. The mechanical properties of modified thermosets were enhanced after adding HB-PED230, indicating a great improvement in toughness for epoxy resin.
REACTIVE & FUNCTIONAL POLYMERS
(2021)
Article
Materials Science, Composites
Guorui Yang, Yan Ma, Chen Liu, Lanyue Zhang, Xiangwei Li, Weifeng Du, Lei Shang, Yuhui Ao
Summary: Inspired by the strengthening effect of nanoparticles and the toughening effect of block polymers, a block polymer filler with graphene oxide (GO) was prepared, which significantly improved the mechanical properties of epoxy composites. The combination of GO and side groups promoted dispersion and toughening. This research has potential application value in the field of resin fillers and in combination with other materials.
POLYMER COMPOSITES
(2022)
Article
Chemistry, Multidisciplinary
Xin Liu, Huanghu Wu, Wei Xu, Yu Jiang, Junheng Zhang, Bangjiao Ye, Hongjun Zhang, Sufang Chen, Menghe Miao, Daohong Zhang
Summary: This study presents the preparation of hyperbranched epoxy resins with imide structures, which exhibit excellent comprehensive properties in terms of strength, modulus, toughness, low-temperature resistance, and degradability. By controlling the molecular free volume properties, the conflicts between strength and toughness and between high performance and highly efficient degradation are successfully resolved, providing a new approach for designing ultrastrong, tough, and recyclable thermoset epoxy resins.
ADVANCED MATERIALS
(2023)
Article
Materials Science, Composites
Muhammad Sajjad, Zhongfu Zhao, Xiuling Zhu, Yue Shi, Chunqing Zhang
Summary: In this study, SEBS-g-PEG copolymers with transitional molecular structures were synthesized to toughen epoxy thermosets. These copolymers showed good compatibility with epoxy thermosets without plasticizing effect and could form micro-phase separation morphology suitable for toughening the epoxy thermosets. Increasing branching density in SEBS-g-PEG improved toughening effect while maintaining thermal stability of the materials.
COMPOSITES COMMUNICATIONS
(2021)
Article
Chemistry, Multidisciplinary
Qingsong Zhu, Ke Zhang, Yuxiang Huang, Ruohan Liu, Yifan Pan, Haobin Zhang, Peng Wang, Shijie Zhang, Duo Pan, Zhanhu Guo
Summary: Graphene and its derivatives can enhance the resistance of waterborne epoxy resin coatings to long-term corrosion. Zinc oxide-reduced graphene oxide (ZnO-RGO) sheet hybrids, synthesized via the hydrothermal method, can be stably dispersed in waterborne epoxy coatings and significantly improve their corrosion resistance.
JOURNAL OF NANOSTRUCTURE IN CHEMISTRY
(2022)
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
Mohannad Naeem, Hsu-Chiang Kuan, Andrew Michelmore, Sirong Yu, Adrian P. Mouritz, Sanjay S. Chelliah, Jun Ma
Summary: A green and novel method was developed for preparing epoxy/graphene nanocomposites by microwave radiation and mechanical stirring, which successfully produced surface-modified graphene platelets without the need for organic solvents and surfactants. The process resulted in exfoliated and well-dispersed graphene platelets with improved mechanical and functional properties of the epoxy resin.
Article
Materials Science, Multidisciplinary
Jie Fan, Jiping Yang, Hong Li, Junpeng Tian, Jinrui Ye, Yunfeng Zhao
Summary: The functionalization of graphene oxide with epoxy monomers improved the dispersion in matrix and interfacial properties of nanocomposites. Results showed that functionalized GO with larger interlayer distance exhibited better dispersion and mechanical properties in epoxy nanocomposites, suggesting potential toughening mechanisms for epoxy resins.
JOURNAL OF MATERIALS SCIENCE
(2022)
Article
Polymer Science
Hui Xu, Zhiqing Liu, Chenghui Qiao, Xintao Zhang, Qi Zhang, Yuerong Zhang, Yaochen Zheng
Summary: This study demonstrates the uniform dispersion of GO and rGO within epoxy resin using a surfactant, leading to significant enhancement in performance.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Retraction
Nanoscience & Nanotechnology
Bibekananda De, Brigitte Voit, Niranjan Karak
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Materials Science, Paper & Wood
Geeti Kaberi Dutta, Niranjan Karak
Summary: This study presents an environmentally friendly fabrication method of a bio-based waterborne polyester nanocomposite for corrosion protection of metal surfaces. The nanocomposite, reinforced with a cellulose nanofiber-reduced graphene oxide-zinc oxide nanohybrid, showed excellent anticorrosion activity and maintained transparency, mechanical toughness, thermal stability, and chemical resistance. The prepared thermosetting nanocomposites have enormous potential as sustainable anticorrosive coating materials.
Article
Polymer Science
Nobomi Borah, Niranjan Karak
Summary: This scientific paper discusses the synthesis of a bio-based tannic acid epoxy resin TAE100 with excellent mechanical properties and adhesive strength, showing potential applications in eco-coatings and adhesives. The thermosets are also biodegradable, as confirmed by microbial testing, making them suitable for environmentally friendly purposes.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Engineering, Environmental
Sukanya Kundu, Niranjan Karak
Summary: This article reviews the recent progress in the application of polymeric photocatalytic membranes (PPM) for environmental remediation. It focuses on the removal efficiency and mechanisms for degrading various pollutants, and highlights the challenges and performances of fabricating PPMs in the presence of sunlight.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Polymer Science
Ashok Bora, Niranjan Karak
Summary: This study synthesized a biobased superabsorbent with high water absorption capacity and fast water absorption rate using starch and itaconic acid, which shows great potential to be used as an environmentally friendly superabsorbent in agricultural applications.
EUROPEAN POLYMER JOURNAL
(2022)
Article
Polymer Science
Annesha Kar, Niranjan Karak
Summary: This article reports the synthesis of a bio-based water-soluble poly(ester amide) through a solvent-free environmentally friendly method, and its further modification using poly(vinyl alcohol). The prepared polymeric resin exhibited excellent mechanical properties, good thermal stability, transparency, and biodegradability, making it a potential environmentally friendly coating material.
JOURNAL OF POLYMER RESEARCH
(2022)
Correction
Chemistry, Multidisciplinary
Suman Thakur, Niranjan Karak
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2022)
Review
Chemistry, Multidisciplinary
Poonam Singh, Anuj Rana, Niranjan Karak, Indresh Kumar, Sravendra Rana, Pankaj Kumar
Summary: Sustainable development is a critical concern in today's fast-paced technological world, and the use of renewable resources is essential in achieving sustainable development goals. Researchers have been focusing on the development of bio-based polymers derived from renewable resources like lignin, chitosan, vegetable oils, cellulose, etc. These polymers, particularly those derived from vegetable oils, offer unique properties that can be used to create value-added systems, such as coatings with improved protective properties against corrosion. This review explores the use of vegetable oil-based self-healing polymers in anti-corrosion coatings.
Article
Materials Science, Composites
Raghav Poudel, Niranjan Karak
Summary: In this study, a green composite of yam and alkali-treated corn stalk fiber was prepared, which exhibited good mechanical and thermal properties and excellent biodegradability under normal environmental conditions. The potential applications of this composite material include packaging, biomedical, automobile, and construction sectors.
COMPOSITES SCIENCE AND TECHNOLOGY
(2023)
Article
Polymer Science
Kalyan Dutta, Niranjan Karak
Summary: BPA-based epoxy thermoset has toxic effects on human health, so there is a need for environmentally friendly bio-based alternatives. In this study, a gallic acid amide was synthesized from renewable gallic acid and diethanol amine, and the epoxy resin was obtained through a condensation reaction. The synthesized epoxy thermosets showed excellent properties.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Samiran Morang, Ashutosh Bandyopadhyay, Jay Hind Rajput, Biman B. Mandal, Atharva Poundarik, Niranjan Karak
Summary: Waterborne polyurethanes with smart attributes like self-healing, shape-memory, reprocessability, and excellent mechanical properties are achieved through the triple synergistic effect of dynamic hard domains, asymmetric IPDI-IPDA architecture, and shape memory effect. This strategy leads to the synthesis of robust self-healable WPUs with high healing efficiency, shape recovery, and outstanding mechanical strength. The SHWPU elastomer exhibits all characteristics of advanced materials with smart attributes and eco-friendly nature.
ACS APPLIED POLYMER MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Samiran Morang, Ashutosh Bandyopadhyay, Biman B. Mandal, Niranjan Karak
Summary: A transparent, self-healable, and highly tough waterborne polyurethane elastomer with amazing mechanical properties has been developed by molecular engineering. The elastomer shows excellent shape recovery, high fracture energy, and good hemocompatibility. Additionally, it retains its mechanical strength during melt re-processability and can be biodegraded with the help of microbes. This material holds great potential as a smart biomaterial and coating for biomedical devices.
ACS APPLIED BIO MATERIALS
(2023)
Article
Materials Science, Biomaterials
Dimpee Sarmah, Munmi Borah, Manabendra Mandal, Niranjan Karak
Summary: In recent years, polysaccharide-based hydrogels have gained attention due to their biodegradability, biocompatibility, and non-toxicity. This study presents a simple method for synthesizing a mechanically tough, biocompatible, and biodegradable hydrogel using polysaccharides like starch and agar. The hydrogel showed high mechanical strength and cell viability, and also exhibited good encapsulation efficiency for antibacterial drugs. The hydrogel with loaded drug demonstrated the potential to be used as a promising candidate in wound dressing applications.
JOURNAL OF MATERIALS CHEMISTRY B
(2023)
Article
Materials Science, Multidisciplinary
Samiran Morang, Jay Hind Rajput, Anwesha Mukherjee, Atharva Poundarik, Bodhisatwa Das, Niranjan Karak
Summary: This study introduces a new strategy to enhance the self-healing ability and mechanical properties of polyurethane (PU) films. By utilizing the triple synergistic effect of a dynamic hard domain, multiple hierarchical hydrogen bonding, and semi-interpenetrating network formation, a series of self-healable waterborne PU/polyacrylic films were prepared. These films exhibit excellent mechanical robustness and biodegradability. The study also demonstrates the potential of these films in biomedical applications.
MATERIALS ADVANCES
(2023)
Article
Chemistry, Multidisciplinary
Nobomi Borah, Muzamil Ahmad Rather, Bibrita Bhar, Biman B. Mandal, Manabendra Mandal, Niranjan Karak
Summary: This study successfully synthesized a nanohybrid of cellulose nanofibers loaded with iron oxide nanoparticles, which showed improved thermomechanical performance and tunable applicability in a bio-based epoxy matrix. Additionally, the nanocomposite exhibited pH-responsive release behavior when used as a carrier platform for an antibacterial drug.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Polymer Science
Tetsu Sato, Mariko Takahashi, Takeshi Saito, Masahito Toyonaga, Itsuo Tanuma, Rie Yamada, Satoru Hosoda
Summary: An automatic evaluation system for photooxidation has been developed and successfully applied to assess the photo-OIT of LDPE samples containing photooxidation stabilizers. The system allows independent setting of various measurement conditions and provides detailed information on the photooxidation process.
POLYMER DEGRADATION AND STABILITY
(2024)
Article
Polymer Science
Zongzheng Zuo, Shuxue Zhou
Summary: In this study, three fluoroalkyl trimethoxysilane (FATMS) additives with different chain lengths were incorporated into a two-component polyurethane clearcoat to improve its hydrophobic durability. The coatings modified with FATMS maintained their surface hydrophobicity under various conditions, but quickly lost it when exposed to both UV irradiation and/or high temperature with water. The results suggest that the FATMS route is more suitable for indoor applications at room temperature.
POLYMER DEGRADATION AND STABILITY
(2024)
Article
Polymer Science
Song Li, Feng Zhao, Xueya Wang, Zhihua Liu, Jingze Guo, Yutong Li, Shuangmei Tan, Zhenxiang Xin, Shuai Zhao, Lin Li
Summary: Green flame retardants have garnered attention for their environmental friendliness, but current options fall short in achieving high flame retardancy for flammable polymers and maintaining environmental protection. This study takes a two-pronged approach to address flame retardants and the flame-retardant process. An eco-friendly bio-based synergistic flame retardant (PAU), synthesized using phytic acid (PA) and urea (U), is used to create a flame retardant coating that can be directly applied to any surface shape using polydopamine as an adhesive. The resulting EPS-PAU exhibits excellent flame retardancy, smoke suppression, and light weight while only slightly increasing the density.
POLYMER DEGRADATION AND STABILITY
(2024)
