Article
Polymer Science
Qiuru Bao, Ren He, Yuan Liu, Qi Wang, Chuhong Zhang
Summary: A novel flame retardant HNT@PZM@Fe(OH)3 with a hierarchical core-shell-dot structure was successfully constructed to improve the flame retardancy, thermal stability, and mechanical properties of epoxy resin (EP). The introduction of 5 wt% HNT@PZM@Fe(OH)3 significantly enhanced the tensile strength and impact strength of EP nanocomposites. The incorporation of HNT@PZM@Fe(OH)3 also resulted in improved flame retardancy and smoke suppression, as evidenced by increased limiting oxygen index (LOI) and reduced heat release rate (PHRR) and smoke production rate (SPR). The interfacial charring catalysis of transition metal oxides played a beneficial role in the formation of residual char structure with higher graphitization degree, thus further improving the fire safety of EP nanocomposites.
EUROPEAN POLYMER JOURNAL
(2023)
Article
Chemistry, Physical
Fuxing Zhao, Jundong Zhu, Tangping Peng, Hao Liu, Shengzhuo Ge, Huasheng Xie, Le Xie, Chongwen Jiang
Summary: The novel polyimide composite aerogel synthesized using functionalized clay halloysite nanotubes showed excellent thermal stability, low density, and high mechanical property, making it a promising thermal management material for practical and complex insulation applications.
APPLIED CLAY SCIENCE
(2021)
Article
Nanoscience & Nanotechnology
Ping Tang, Zijian Zhang, Chenxin Guo, Shaohua Zeng, Pengpeng Chen, Ying Xu, Wangyan Nie, Yifeng Zhou
Summary: Carbon nanotubes have great potential for use in microelectronic packaging due to their excellent thermal conductivities. However, their high electroconductibility and poor radial conductivity limit their application in insulating materials. In this study, a heterostructured brushlike hybrid was prepared by anchoring amine-functionalized multiwalled carbon nanotubes onto insulating montmorillonite. The resulting composites exhibited improved thermal conductivity, mechanical properties, and thermal stability, providing a promising strategy for fabricating polymer composites.
ACS APPLIED NANO MATERIALS
(2022)
Article
Polymer Science
Agustin Forchetti Casarino, Maria Eugenia Taverna, Adriana Candia, Marisa Elisabet Sponton, Giuseppe Raffaello Palmese, John La Scala, Diana Alejandra Estenoz
Summary: A difuran bio-based benzoxazine was synthesized and copolymerized with different thermoset resins to develop novel materials with tailor-made properties. The bio-based benzoxazine/epoxy systems exhibited low polymerization temperature and enhanced processability, but slightly decreased mechanical properties. Bio-based copolymers containing polysilsesquioxane precursor showed high glass transition temperatures, thermal stability, and char yields. All the copolymers exhibited good flame retardant properties.
POLYMERS FOR ADVANCED TECHNOLOGIES
(2023)
Article
Polymer Science
Jia-Xin Cheng, Wan-An Cai, Zhi-Cheng Wang, Abdul Qadeer Dayo, Zhi-Gang Yuan, Wen-Bin Liu, Jun Wang, Zhong-Cheng Pan
Summary: A boron-containing hyperbranched benzoxazine (HB-B) was synthesized and its properties were evaluated. The curing behavior, thermal stability, flame retardancy properties, and mechanical properties of the synthesized HB-B copolymer were studied. It was found that the introduction of HB-B improved the flame retardancy and mechanical properties of the copolymer.
POLYMERS FOR ADVANCED TECHNOLOGIES
(2023)
Article
Chemistry, Applied
Corneliu Hamciuc, Tachita Vlad-Bubulac, Diana Serbezeanu, Gabriela Lisa, Ion Anghel, Dana Maria Preda
Summary: In this study, a novel polyphosphonate and halloysite nanotubes were incorporated into epoxy resin to prepare environmental-friendly nanocomposites with improved flame retardancy.
JOURNAL OF VINYL & ADDITIVE TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Lubomir Lapcik, Harun Sepetcioglu, Yousef Murtaja, Barbora Lapcikova, Martin Vasina, Martin Ovsik, Michal Stanek, Shweta Gautam
Summary: This article compares the mechanical properties of epoxy/graphene and epoxy/halloysite nanocomposites. Different concentrations of graphene nanoplatelets (GnPs) and halloysite nanotubes (HNTs) were used as fillers in the epoxy resin matrices. The results showed increased ductility and plasticity in the GnP nanocomposite samples, while the epoxy/HNT nanocomposites exhibited decreased mechanical stiffness. The complexity of the mechanical response in the investigated nanocomposites was confirmed as a combination of ductile and brittle phenomena.
NANOTECHNOLOGY REVIEWS
(2023)
Article
Chemistry, Physical
Masoumeh Sadat Banijamali, Amir Masoud Arabi, Ali Jannesari, Pooria Pasbakhsh
Summary: This research evaluated a halloysite-based nitrogen-phosphorous fire retardant epoxy system. The study introduced synthesized melamine phosphate and pentaerythritol as an intumescent fire retardant and proposed the use of tubular high aspect ratio halloysite nanotube as a promising reinforcing nanoclay. The results showed that the synthesized fire retardant additives had excellent effects on the fire retardancy of epoxy resin and the strength of the residual char.
APPLIED CLAY SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Lucio Rossi de Souza, Jose Roberto M. d'Almeida, Xiang Cheng, Li-Han Rong, Eugene B. Caldona, Rigoberto C. Advincula
Summary: The copolymerization of a triamine-based benzoxazine and a commercial difunctional epoxy resin was explored to enhance thermal properties. Results indicated significant improvements such as increased glass transition temperature and higher thermal stability compared to individual components. The copolymers showed potential for extended uses in higher temperature applications.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Biochemistry & Molecular Biology
Wissam Bessa, Djalal Trache, Mehdi Derradji, Benaouda Bentoumia, Ahmed Fouzi Tarchoun, Larbi Hemmouche
Summary: In this study, microcrystalline cellulose modified by a silane coupling agent was used as a reinforcing agent for benzoxazine resin to manufacture composites at different loadings. Characterizations of the modified MCC were conducted, followed by an investigation on the crosslinking process and dynamic mechanical properties of the composites. Results showed that the modified MCC improved the performance of the composites and enhanced thermal stability.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2021)
Article
Chemistry, Applied
Saeid Nikafshar, John McCracken, Kevin Dunne, Mojgan Nejad
Summary: This study developed a novel method to encapsulate organic UV stabilizers and lignin into halloysite nanotubes, improving the UV stability of epoxy coatings. Epoxy samples containing HNTs with encapsulated organic UV stabilizers and lignin exhibited significantly higher UV stability after accelerated weathering tests compared to epoxy resin with the same concentration of these components.
PROGRESS IN ORGANIC COATINGS
(2021)
Article
Polymer Science
Wei Liang Lai, Nikhil Sachdeva, Yee Vien Tan, Pooria Pasbakhsh, Hamid Saeedipour, Kheng Lim Goh
Summary: This study evaluated the mechanical, physical, thermal, and chemical properties of two commercially available adhesives (Epo-Tek 301 and Nano-Force E100) and prepared DGEBA adhesives with different percentages of HNTs and CNTs. The results showed that there were no significant differences in the properties between the neat DGEBA and DGEBA with 1 wt% HNTs. However, the properties deteriorated for adhesives with more than 1 wt% HNTs, and there was no enhancement in all properties for adhesives containing CNTs. The adhesives containing CNTs also exhibited higher viscosity, which could hinder resin infiltration for composite repair applications.
POLYMERS FOR ADVANCED TECHNOLOGIES
(2023)
Article
Chemistry, Applied
Saeid Nikafshar, John McCracken, Kevin Dunne, Mojgan Nejad
Summary: Epoxy coatings are widely used for their excellent properties, but are susceptible to UV degradation. This study developed a new method to encapsulate organic UV stabilizers and lignin into halloysite nanotubes for improving UV stability. The encapsulated nanotubes showed significantly higher UV stability compared to individual components when added to epoxy resin.
PROGRESS IN ORGANIC COATINGS
(2021)
Article
Chemistry, Applied
Saeid Nikafshar, John McCracken, Kevin Dunne, Mojgan Nejad
Summary: A novel method was developed to encapsulate organic UV stabilizers and lignin into halloysite nanotubes, improving the UV stability of epoxy coatings. Results showed that encapsulated HNTs significantly increased the UV stability of epoxy coatings, demonstrating their efficacy in extending the service life of the coatings.
PROGRESS IN ORGANIC COATINGS
(2021)
Review
Chemistry, Multidisciplinary
Deepak Rawtani, Swath Satish, Piyush Rao
Summary: Industrial and academic communities are closely following the advancements in polymer nanocomposite technology, which aims to enhance specific characteristics through the combination of nanomaterials. The properties of resulting nanocomposites depend on factors such as the choice of clay, pretreatment, choice of polymers, and the method of incorporating polymers. The addition of nanoparticles to polymers significantly changes the properties of the composites, with the effects relying on the processing and surface treatment of the nanomaterials. Halloysite nanotubes (HNTs) have surface features that allow for surface modifications, and their inter-tubular and interfacial interactions with polymers enhance the thermal properties of the nanocomposites. Halloysite has been recognized as a suitable nanomaterial to improve the thermal stability and flame retardancy of resulting nanocomposites.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2023)
