Article
Polymer Science
Yin Yam Chan, Chao Ma, Feng Zhou, Yuan Hu, Bernhard Schartel
Summary: An alternative phosphorous soybean-oil-based polyol was used for flexible polyurethane foams synthesis, with the addition of 5% and 10% expandable graphite (EG) to improve flame retardancy. The combination of phosphorous polyols and EG showed significantly enhanced flame retardancy, with a three times increase in char yield, indicating a potential strategy for future flame retarded FPUFs.
POLYMER DEGRADATION AND STABILITY
(2021)
Article
Engineering, Environmental
Fang Liu, Shuming Chen
Summary: Bio-based acoustic materials synthesized with coconut oil and rapeseed oil polyurethane show superior acoustic and mechanical properties compared to petroleum-based polyurethane, making them a promising alternative for future applications.
JOURNAL OF POLYMERS AND THE ENVIRONMENT
(2021)
Article
Polymer Science
Joo Hyung Lee, Seong Hun Kim, Kyung Wha Oh
Summary: In this study, castor oil was utilized as a sustainable resource to synthesize multifunctional polyols for the production of polyurethane foam, aiming to improve production efficiency, sustainability, and compressive strength. The results demonstrated that using multifunctional polyol blends to fabricate polyurethane foams effectively enhances their compressive properties. The findings are expected to broaden the applications of bio-based polyurethane foams.
Article
Green & Sustainable Science & Technology
Krzysztof Polaczek, Maria Kuranska, Aleksander Prociak
Summary: This article discusses the potential of using used cooking oil as a feedstock for producing open-cell polyurethane foam. The study focuses on the effects of bio-polyol properties on the properties of the final foam, and the key step in the synthesis of bio-polyols. The results show that the foams produced using used cooking oil-based polyols have comparable properties to commercial products.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Materials Science, Characterization & Testing
Jungha Lee, Jung Hyeun Kim
Summary: In this study, castor oil-based bio-polyol and two types of gelling catalysts were used to synthesize PU foams. The effects of bio-polyol content and catalyst type on sound absorption, compression strength, and VOCs emission were examined. The results showed that increasing bio-polyol content and using a tin catalyst resulted in smaller cavity and pore sizes, leading to higher sound absorption and compression strength. Moreover, the application of bio-polyol also reduced VOCs emissions from foam degradation. Therefore, using bio-derived polyol holds promise for reducing environmental issues in industrial applications.
Article
Biochemistry & Molecular Biology
Marcin Borowicz, Marek Isbrandt, Joanna Paciorek-Sadowska
Summary: The research aimed to obtain two new eco-polyols based on waste polylactide (PLA) and tested their effects on rigid polyurethane and polyisocyanurate foams. Analysis showed that partial replacement of petrochemical polyol by eco-polyols resulted in better performance in terms of density, compressive strength, brittleness, water absorption, and aging resistance for both RPU/PIR and PRU foams.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2021)
Article
Polymer Science
Mingyang Li, Daidong Wei, Wenchao Zhang, Liyan Liang, Qiwen Yong
Summary: A vegetable oil-based polyol was used to obtain a biobased polyurethane anti-smudge coating with excellent anti-ink and self-cleaning performance. The coating exhibited high smoothness, transparency, and mechanical robustness, and could easily repel water, ink, and other liquids without leaving any residue.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Chemistry, Applied
Shuai Wang, Fukai Yang, Wei Sun, Xinyu Xu, Yuyuan Deng
Summary: Rigid polyurethane foam (RPUF) is commonly used but consumes a large amount of petroleum. To address this issue, green and sustainable polyols were synthesized. The main disadvantage of RPUF is its flammability. To improve its flame retardancy, phosphorylated soybean oil polyol (Polyol-P) and phenyl phospho-soybean oil polyol (Polyol-PPOA) were used. The results showed that the cell sizes and numbers of RPUF-P and RPUF-PPOA varied with the contents of Polyol-P and Polyol-PPOA. Mechanical tests revealed the compressive strengths of RPUF-P4 and RPUF-PPOA4, while the limiting oxygen index and UL 94 ratings demonstrated the flame retardancy of RPUF-P and RPUF-PPOA.
JOURNAL OF THE AMERICAN OIL CHEMISTS SOCIETY
(2023)
Article
Materials Science, Multidisciplinary
Celia F. Frias, Ana C. Fonseca, Jorge F. J. Coelho, Armenio C. Serra
Summary: This study presents a straightforward and selective method for preparing polyols for PU films by reacting epoxidized soybean oil with amino alcohols. The properties of the resulting PU films depend on the amount of Tolonate in the formulation, obtained through amidation without solvents and catalysts.
MACROMOLECULAR MATERIALS AND ENGINEERING
(2021)
Article
Chemistry, Physical
Elzbieta Malewska, Krzysztof Polaczek, Maria Kuranska
Summary: The search for new sources of raw materials for the synthesis of polyurethanes and other polymers is crucial. This article presents a method of obtaining compounds from used cooking oil for the creation of polyurethanes. The impact of different catalysts on transesterification reactions, post-reaction mixture composition, and the use of the products in polyurethane foam synthesis were investigated.
Article
Environmental Sciences
Mohd Haziq Dzulkifli, Rohah A. Majid, Mohd Yazid Yahya
Summary: Due to its non-recyclable nature, industrial rockwool fiber wastes have caused environmental and waste management issues. This study presents a solution by synthesizing a palm oil-based polyurethane foam with reclaimed rockwool fibers as fillers. The resulting composite foam shows improved thermal stability and foam properties, indicating potential for applications requiring moderate thermal stability and load-bearing capabilities.
JOURNAL OF MATERIAL CYCLES AND WASTE MANAGEMENT
(2022)
Article
Materials Science, Characterization & Testing
Marzena Szpilyk, Renata Lubczak, Jacek Lubczak
Summary: A new polyol was synthesized from cellulose, glycidol, and ethylene carbonate for rigid polyurethane foam production, showing similar physical properties, superior thermal resistance, and good biodegradability in soil. The foam exhibited improved compressive strength after thermal exposure and 70-80% biodegraded within 28 days in soil.
Article
Chemistry, Physical
Shu Peng, Depeng Gong, Youliang Zhou, Chaocan Zhang, Yinchun Li, Chunyang Zhang, Yitian Sheng
Summary: This paper proposes an environmentally friendly recycling process for the degradation of waste polyurethane foam using triblock polyether. The degradation product can be directly utilized to synthesize recycled polyurethane foam, which has excellent oil absorption performance and reusability after hydrophobic modification. This economical and green process shows great prospects for large-scale applications.
Article
Engineering, Environmental
Gurjot S. Dhaliwal, Dilpreet S. Bajwa, Sreekala Bajwa
Summary: By adding nanoclay to soy-based PU foam, the foam exhibited superior mechanical and flame retardant properties.
JOURNAL OF POLYMERS AND THE ENVIRONMENT
(2021)
Article
Polymer Science
Gabriel Kiss, Gerlinde Rusu, Geza Bandur, Iosif Hulka, Daniel Romecki, Francisc Peter
Summary: The study showed that using recycled polyol as a replacement for fossil-based polyol in flexible polyurethane foam production can maintain similar physical properties at low density. By optimizing the formulation at high levels of recycled polyol, it is possible to reduce the emission of volatile organic compounds, opening the way for further studies to increase PU waste reutilization and decrease petroleum-based raw materials.
Article
Engineering, Biomedical
Vijay Shankar Kumawat, Sanchita Bandyopadhyay-Ghosh, Subrata Bandhu Ghosh
Summary: This article critically reviews the translational research on various engineered biomaterials for orthopaedic healthcare, aiming to bring transformative changes in bone repair. It discusses the composition and ultrastructure of bone, the global perspective on bone fracture surgeries, and the types, benefits, and challenges of natural and synthetic bone grafts. The article provides an overview of clinically relevant biomaterials, from traditionally used metallic, bioceramic, and biopolymeric biomaterials to new generation composites. It concludes with a discussion on the emerging trends and future perspectives of promising bone grafts.
JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION
(2023)
Article
Engineering, Biomedical
Adithya Garimella, M. Ramya, Subrata Bandhu Ghosh, Sanchita Bandyopadhyay-Ghosh, Ashish Kumar Agrawal
Summary: Magnesium alloy-based porous bio-nanocomposite bone scaffolds were developed with selective alloying elements and bioactive nanoparticles. The mechanical properties and bone tissue regeneration of the scaffolds were enhanced, making it a promising candidate for bone tissue engineering.
JOURNAL OF BIOMEDICAL MATERIALS RESEARCH PART B-APPLIED BIOMATERIALS
(2023)
Review
Polymer Science
Kapender Phogat, Subrata Bandhu Ghosh, Sanchita Bandyopadhyay-Ghosh
Summary: There has been significant interest in developing injectable hydrogel scaffolds for efficient healing and regeneration of defective bone tissues. These scaffolds can be injected into irregularly shaped defects and act as a reservoir for necessary components for bone tissue repair. The trend is to develop nanocomposite scaffolds that mimic the hierarchical nanostructure and composition of natural bone by combining biopolymers and inorganic nanofillers. The ability to tailor these scaffolds to patient-specific bone properties leads to better biological responses.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Materials Science, Composites
Firoz Alam Faroque, Subrata Bandhu Ghosh, Sanchita Bandyopadhyay-Ghosh, M. P. Akhtar, Harsh Pandey
Summary: This paper investigates the development of waste marble dust-reinforced particulate composites through an integrated approach of investigation. The study demonstrates that increasing the ceramic filler's loading level in marble-epoxy composites leads to superior properties, such as compressive and flexural strength. Microstructural characterizations using various techniques reveal chemical linkages forming between the epoxy resin and marble dust, strong interfacial bonding between filler and matrix, enhancement of thermal properties, and increased crystallinity. Micro-mechanical modeling using the representative volume element (RVE) approach is also performed to determine Young's modulus and validate experimental results.
PLASTICS RUBBER AND COMPOSITES
(2023)
Article
Engineering, Environmental
Vijay Shankar Kumawat, Ravindra Kumar Saini, Ashish Kumar Agrawal, Deepak Khare, Ashutosh Kumar Dubey, Subrata Bandhu Ghosh, Sanchita Bandyopadhyay-Ghosh
Summary: This study reports the development of bioactive fluorcanasite-fluorapatite nanoparticle (nFC-FAp) reinforced poly-(epsilon-caprolactone) (PCL) bio-nanocomposite bone scaffolds using a biomimetic approach. The filler-matrix combination was chosen to facilitate biomineralization, tunable degradation, and cellular response. A hybrid technique was used to create hierarchical porosity within the scaffolds, mimicking the architecture of natural bone. The fabricated scaffolds exhibited compatibility between the PCL matrix and nFC-FAp reinforcement, enhanced hydrophilicity, controllable degradation, and improved cell viability.
JOURNAL OF POLYMERS AND THE ENVIRONMENT
(2023)
Review
Engineering, Biomedical
Tanmay Gupta, Subrata Bandhu Ghosh, Sanchita Bandyopadhyay-Ghosh, Mohini Sain
Summary: The rehabilitative capabilities of tissue engineered scaffolds depend on biomechanical properties, chemical behavior, and cellular response modulation. Among available fabrication techniques, only 3D bioprinting can replicate the heterogeneity of host tissue. However, current 3D bioprinting scaffolds have poor mechanical properties, leading to increased interest in load-bearing 3D bioprinting orthopedic scaffolds.
Article
Polymer Science
Vijay Shankar Kumawat, Sanchita Bandyopadhyay-Ghosh, Subrata Bandhu Ghosh
Summary: A biomimetic strategy was used to develop bio-nanocomposite bone scaffolds with improved mechanical performance and cellular compatibility. The scaffolds incorporated nano-fluorcanasite within a biodegradable PCL matrix and exhibited a hierarchical porous architecture similar to natural bone. The presence of fluorcanasite and fluorapatite phases, enhanced crystallinity, and higher Ca:P ratio were confirmed through XRD and elemental mapping studies. The scaffolds also demonstrated homogenous dispersion of nFC particulates and sustained load against pore collapse.
EXPRESS POLYMER LETTERS
(2023)
Article
Engineering, Biomedical
Abhijit Vyas, Samiran Mondal, Vijay Shankar Kumawat, Subrata Bandhu Ghosh, Dhaneshwar Mishra, Jayant Sen, Deepak Khare, Ashutosh Kumar Dubey, Samit Kumar Nandi, Sanchita Bandyopadhyay-Ghosh
Summary: This article introduces a method for developing patient-specific bone scaffolds that can expedite bone regeneration, particularly for critical-sized bone defects or fractures. The research results demonstrate that the scaffolds have biocompatibility and noncytotoxicity, and can promote angiogenesis and bone tissue activity.
JOURNAL OF BIOMEDICAL MATERIALS RESEARCH PART B-APPLIED BIOMATERIALS
(2023)