Article
Construction & Building Technology
Raissa Gallu, Francoise Mechin, Jean-Francois Gerard, Florent Dalmas
Summary: This paper reviews the influence of hard segment chemical structure on the properties of thermoplastic polyurethanes based on dimer fatty acid soft segments and on their blends with bitumen. The results indicate that phase separation quality depends on the choice of hard segments and their ability to self-organize within crystalline structures. Morphology analysis and swelling measurements demonstrate that the quality of phase separation and compatibility with bitumen have a significant impact on the polymer's swelling.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Materials Science, Biomaterials
Helma Vakili, Mohsen Mohseni, Hossein Ghanbari, Hossein Yahyaei, Hesam Makki, Alba Gonzalez, Ana Alonso-Varona, Patricia Garrido Pascual, Lourdes Irusta
Summary: The study found that adding a certain proportion of hydrophilic polyethylene glycol (PEG) to polyurethane materials can significantly improve the hemocompatibility of the material, which is of great significance for cardiovascular device coatings.
INTERNATIONAL JOURNAL OF POLYMERIC MATERIALS AND POLYMERIC BIOMATERIALS
(2022)
Article
Engineering, Biomedical
Georgina Alejandra Venegas-Cervera, Andres Ivan Oliva, Alejandro Avila-Ortega, Jose Manuel Cervantes-Uc, Leydi Maribel Carrillo-Cocom, Juan Antonio Juarez-Moreno
Summary: Electrospun polyurethane membranes were fabricated using arginine as chain extender to test fibroblasts affinity and adhesion, with results indicating greater fluorescent surface area on dense control membranes made from Tecoflex compared to electrospun and dense PUUR. SEM analysis revealed the well-spread shape of cells on electrospun membranes, attributing to the fiber's structure. Cell morphology and attachment assay results showed a good response related to cell adhesion on the surface of electrospun PUUR membranes.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN MEDICINE
(2021)
Article
Materials Science, Textiles
Safarul Mustapha, Yoshito Andou
Summary: The study aimed to investigate the effects of modifying polyurethanes (PUs) with cellulose acetate (CA) at different weight ratios. The findings revealed that adding 10% CA as a chain extender was the optimal percentage for preparing PUs with the highest tensile strength and elongation properties.
FIBERS AND POLYMERS
(2021)
Article
Chemistry, Applied
Wei Xu, Wen Wang, Lifen Hao, Hongna Liu, Fang Hai, Xuechuan Wang
Summary: The novel fluorinated waterborne polyurethanes, synthesized using CC-F as a chain extender, significantly improved the hydrophobic and mechanical properties of the films. The water contact angle and tensile strength values of CC-FPUF-8 film were respectively 34.1 degrees and 24.47 MPa higher than those of the CC-FPUF-0 film.
PROGRESS IN ORGANIC COATINGS
(2021)
Article
Biochemistry & Molecular Biology
Aleksandra Kuzminska, Aleksandra Wojciechowska, Beata A. Butruk-Raszeja
Summary: This study describes a method for modifying polyurethane small-diameter vascular prostheses by introducing acrylic acid and peptides to increase EC adhesion and decrease platelet adhesion, resulting in materials with high hemocompatibility._comparison of two types of peptide coatings showed that YISGR-coated prostheses had more promising results than REDV-coated ones.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2021)
Article
Polymer Science
Tao Zhang, Yajun Deng, Wenshuo Zhang, Guannan Wang, Yuye Zhong, Cheng Su, Houbin Li
Summary: In this study, curcumin, a natural pigment, was used as a chain extender to synthesize environmentally friendly waterborne polyurethane with excellent UV absorption properties. The effect of curcumin content on the transparency, thermal stability, and mechanical properties of the polyurethane film was investigated. The results showed that the addition of curcumin improved the UV absorption and thermal stability, but excessive curcumin content reduced the mechanical properties of the film.
Article
Engineering, Chemical
Saiping Chen, Weiying Zhang, Yiming Ye, Xiaoguang Ying, Jianying Huang, Xiao Li
Summary: Sodium lignosulfonate amine (SLA) was synthesized and used as a hydrophilic chain extender in the design and preparation of lignin-modified waterborne polyurethane (WPU) with different branched structures. The introduction manner of SLA significantly impacted the stability and performance of the WPU dispersion. The addition of 0.75 wt% SLA in an appropriate manner improved the tensile strength, water resistance, and thermal stability of the modified WPU film.
INTERNATIONAL JOURNAL OF ADHESION AND ADHESIVES
(2023)
Article
Polymer Science
Yao Ma, Lianfeng Wu, Shaolong Li, Xu Han, Xiaoyong Peng, Yingmin Feng, Yumei Ji, Yike Yang, Feng Liu
Summary: In this study, a new type of polyurethane with adjustable hard segment distribution and enhanced performance was successfully synthesized. Compared to conventional polyurethane, the new polyurethane exhibited advantages of regular structure, uniform hard segment distribution, narrow molecular weight distribution, and strong intra/inter-chain hydrogen bonding interactions, leading to improved microphase separation. The new polyurethane had a tensile strength of 35 MPa, 46% higher than the control polyurethane. Additionally, it also showed enhanced heat resistance. Our study provides a feasible guide for designing high-performance polyurethanes.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Nutrition & Dietetics
Shuang Wang, Soohan Jung, Kwang Suk Ko
Summary: This study found that supplementation of SCAAs and BCAAs can inhibit hepatic fat accumulation and affect the expression of genes related to glucose and lipid metabolism.
Article
Polymer Science
Changli Shan, Chuang Ning, Jingjie Lou, Wei Xu, Yingqiang Zhang
Summary: A series of UV-WFPU were successfully prepared with excellent dispersion, hydrophobicity, and damping properties. The mechanical properties of the films were enhanced, showing potential application values in the fields of damping, anti-corrosion, and dust prevention.
Article
Hematology
Jingjing Wang, Huixin Peng, Ayse Anil Timur, Vinay Pasupuleti, Yufeng Yao, Teng Zhang, Sun-Ah You, Chun Fan, Yubing Yu, Xinzhen Jia, Jing Chen, Chengqi Xu, Qiuyun Chen, Qing Wang
Summary: The angiogenic factor AGGF1 promotes angiogenesis and regulates various cellular processes, with integrin alpha 5 beta 1 identified as its receptor. Interaction between AGGF1 and alpha 5 beta 1 activates key signaling molecules involved in angiogenesis. A specific angiogenic domain of AGGF1 plays a crucial role in its function, highlighting potential therapeutic targets for vascular diseases.
ARTERIOSCLEROSIS THROMBOSIS AND VASCULAR BIOLOGY
(2021)
Review
Cell Biology
Michaela E. Trautman, Nicole E. Richardson, Dudley W. Lamming
Summary: The proportion of people suffering from age-related diseases is increasing worldwide. Recent research has shown that low protein diets, particularly those low in branched-chain amino acids (BCAAs), can reduce mortality and promote metabolic health and extended lifespan in both humans and rodents. This article discusses the emerging evidence that BCAAs play a crucial role in healthy metabolism and longevity, and explores the physiological and molecular mechanisms behind the benefits of restricting dietary BCAAs. The findings suggest that the quality of protein, specifically the composition of dietary protein, may be a previously overlooked factor in metabolic dysfunction and reducing dietary BCAAs could be a promising new approach to delaying and preventing age-related diseases.
Article
Polymer Science
Yi-Lang Qin, Ping Zhu, Chen-Xi Ouyang, Xia Dong
Summary: This study investigates the effect of the chemical structure of chain extenders on the hydrogen bonding and mechanical properties of PCUs by synthesizing PCUs with different types of chain extenders. The results show that even minor differences in the chain extender's chemical structure can result in significant variations in phase separation, condensed morphologies, thermal and mechanical properties. The symmetry of the chain extender improves the ordering of the hydrogen bonding, and the coherence strength of the urethane/urea group also plays a key role in the polymer's properties.
CHINESE JOURNAL OF POLYMER SCIENCE
(2023)
Article
Polymer Science
Muhammad Shafiq, Muhammad Taqi Zahid Butt, Shahzad Maqsood Khan
Summary: The study found that the hardness and abrasion resistance of the PU elastomer increase with higher concentrations of mono ethylene glycol, while the density decreases. Structural analysis via FTIR confirms the formation of polyurethane elastomer with characteristic peaks demonstrated.
Article
Polymer Science
Jose Antonio Arcos-Casarrubias, Humberto Vazquez-Torres, Jorge Alberto Granados-Olvera, Asdrubal J. Cedeno, Jose Manuel Cervantes-Uc
Summary: The addition of PDMS-DGE-DCH modifier can enhance the toughness and ductility of epoxy resin without causing phase separation. PDMS-DGE-DCH can participate in the cure reaction of epoxy resin, improving the performance of the epoxy resin.
Article
Engineering, Chemical
Luis Alfonso Can-Herrera, Andres Ivan Oliva, Jose Manuel Cervantes-Uc
Summary: Polycaprolactone (PCL) and poly(lactic acid) (PLA) are two polymers with unique properties, and their blending can produce a new biodegradable material with balanced properties. However, both PCL and PLA are highly hydrophobic materials. The surface characteristics of electrospun PCL/PLA blends can be improved by air plasma treatment and adjusting the content of its components.
POLYMER ENGINEERING AND SCIENCE
(2022)
Article
Polymer Science
Soledad Cecilia Pech-Cohuo, Hector Martin-Lopez, Jorge Uribe-Calderon, Nancy Guadalupe Gonzalez-Canche, Ivan Salgado-Transito, Alejandro May-Pat, Juan Carlos Cuevas-Bernardino, Teresa Ayora-Talavera, Jose Manuel Cervantes-Uc, Neith Pacheco
Summary: The properties of biological-chemical chitosan (BCh) films prepared from marine-industrial waste and a non-conventional Ramon starch (RS) were investigated. The blended films of BCh/RS with quercetin showed good thermal stability, improved antioxidant and antimicrobial activity. These films have potential applications as coating materials in food packaging.
Article
Chemistry, Multidisciplinary
Jorge A. Uribe-Calderon, Cielo G. Poot-Bote, Jose M. Cervantes-Uc, Elda L. Pacheco-Pantoja, Ileana Echevarria-Machado, Nayeli Rodriguez-Fuentes
Summary: Functionalization of multi-walled carbon nanotubes (MWCNTs) is an important area in the field of materials with biological applications. This study evaluated the effect of oxidized MWCNTs on hepatic carcinoma cell cultures. The results showed that different oxidation methods resulted in varying surface characteristics and structural changes, with nitric acid/sulfuric acid oxidation having the highest cell toxicity. P-MWCNTs exhibited slight cytotoxic and genotoxic effects without affecting cell viability.
JOURNAL OF NANOPARTICLE RESEARCH
(2022)
Article
Chemistry, Applied
Erik Uc-Fernandez, Jorge Gonzalez-Sanchez, Alejandro Avila-Ortega, Yamile Perez-Padilla, J. Manuel Cervantes-Uc, Javier Reyes-Trujeque, William A. Talavera-Pech
Summary: In this study, the anticorrosive properties of MCM-41-HDTMS functionalized silica particles incorporated into MTES sol-gel coatings were investigated. The addition of MCM-41-HDTMS increased the contact angle and improved the protection of metals.
JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH
(2023)
Article
Biochemistry & Molecular Biology
Paola Hassibe Azueta-Aguayo, Martha Gabriela Chuc-Gamboa, Fernando Javier Aguilar-Perez, Fernando Javier Aguilar-Ayala, Beatriz A. Rodas-Junco, Rossana Faride Vargas-Coronado, Juan Valerio Cauich-Rodriguez
Summary: This study investigated the physicochemical, mechanical, and biological properties of chitosan scaffolds crosslinked with ammonium hydroxide at different pH values to understand their impact on cell behavior. The neutralized scaffolds showed improved cell proliferation and morphology, while the high pH value decreased cell viability.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Engineering, Biomedical
Guido Antonio Zapata-Catzin, Gualberto Antonio Zumbardo-Bacelis, Rossana Vargas-Coronado, Jorge Xool-Tamayo, Victor Ermilo Arana-Argaez, Juan Valerio Cauich-Rodriguez
Summary: In this study, segmented polyurethanes with thiol containing compounds were synthesized and filled with copper chelates. The addition of copper complexes improved the thermal degradation and mechanical properties of the polyurethanes, and showed good biocompatibility.
JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION
(2023)
Article
Polymer Science
Juan Encalada-Alayola, Jorge A. Uribe-Calderon, Wilberth A. Herrera-Kao, Santiago Duarte-Aranda, Gerardo M. Alonzo-Medina, Ruben Dominguez-Maldonado, Jose Manuel Cervantes-Uc
Summary: The aim of this study was to investigate the potential of low-generation PAMAM dendrimers as drug nanocarriers for 5-FU and determine the most efficient generation type. PAMAM dendrimers (up to 2.0 generation) were synthesized and characterized, followed by successful incorporation of 5-FU. In vitro release studies showed that full-generation dendrimers exhibited the highest drug load capacity and slowest release rate, and the drug release kinetics were best described by the Korsmeyer-Peppas model. These results confirm the suitability of low-generation dendrimers as polymeric nanocarriers for drug delivery applications.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Hugo Espinosa-Andrews, Celso Velasquez-Ordonez, Jose Manuel Cervantes-Uc, Rogelio Rodriguez-Rodriguez
Summary: In this study, chitosan hydrogels were prepared using different concentrations and molecular weights of chitosan. The physicochemical properties of the hydrogels were evaluated, including thermal stability, chemical structure, microstructure, water state, water sorption, and viscoelastic properties. The chitosan hydrogels showed high hydrophilicity, solid-viscoelastic behavior, and porous, interconnected structures, making them suitable for biomedical applications as polymer scaffolds.
JOURNAL OF MATERIALS SCIENCE
(2023)
Article
Polymer Science
David Alejandro Aguilar-Perez, Cindy Maria Urbina-Mendez, Beatriz Maldonado-Gallegos, Omar de Jesus Castillo-Cruz, Fernando Javier Aguilar-Ayala, Martha Gabriela Chuc-Gamboa, Rossana Faride Vargas-Coronado, Juan Valerio Cauich-Rodriguez
Summary: This study aimed to assess the effect of propolis on the antibacterial, mechanical, and adhesive properties of a commercial poly(alkenoate) cement. The modified cement showed activity against S. mutans, although reductions in compressive and flexural strength were observed with the addition of propolis. The adhesive strength showed a statistical difference.
Article
Polymer Science
Gabriela Fletes-Vargas, Hugo Espinosa-Andrews, Jose Manuel Cervantes-Uc, Isaias Limon-Rocha, Gabriel Luna-Barcenas, Milton Vazquez-Lepe, Norma Morales-Hernandez, Jorge Armando Jimenez-Avalos, Dante Guillermo Mejia-Torres, Paris Ramos-Martinez, Rogelio Rodriguez-Rodriguez
Summary: Chitosan hydrogels were prepared by freeze-drying at different concentrations and molecular weights, and sodium bicarbonate was used as a crosslinking agent for physical crosslinking of chitosan sponges. XPS analysis confirmed the physical crosslinking of chitosan hydrogels using sodium bicarbonate. The chitosan hydrogels exhibited semi-crystalline nature, highly porous structure, high water absorption, and thermal stability, as well as non-cytotoxicity towards HT29 cells. Therefore, physically crosslinked chitosan hydrogels show great potential as biomaterials for biomedical applications.
Article
Engineering, Chemical
Kevin Alejandro Aviles-Betanzos, Juan Valerio Cauich-Rodriguez, Manuel Octavio Ramirez-Sucre, Ingrid Mayanin Rodriguez-Buenfil
Summary: This study extracted and identified phenolic compounds from Habanero pepper using ultrasound, finding that the extracts were sensitive to environmental conditions. Spray drying was found to be a viable option for preserving the bioactive compounds. The optimal spray drying conditions were determined using response surface methodology, resulting in a high-quality dried product with potential for functional food development.
Article
Engineering, Biomedical
A. D. Abreu-Rejon, W. Herrera-Kao, A. May-Pat, A. Avila-Ortega, N. Rodriguez-Fuentes, J. A. Uribe-Calderon, J. M. Cervantes-Uc
Summary: Surface modification of Tecoflex SG-80A Polyurethane films using polyethylene glycol (PEG) chains resulted in improved surface properties. The PEG-grafted polyurethane extracts showed increased viability of osteoblasts but had no significant effect on fibroblasts. Lower PEG grafting densities promoted healthier cell morphology.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN MEDICINE
(2022)
Article
Engineering, Biomedical
Mehlika Karamanlioglu, Serap Yesilkir-Baydar
Summary: This study determined the influence and ideal ratios of different amounts of coconut oil in gelatin-based films as wound dressings. Increasing coconut oil content improved the mechanical properties, thermal stability, cell viability, and wound healing ability of the films. CO-2 and CO-4 showed the best performance among the samples.
JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION
(2024)
Article
Engineering, Biomedical
Yu-Min Chen, Chihoko Tokoda, Yasuhiko Tabata
Summary: The objective of this study is to establish strategies to uniformly proliferate cells in a three-dimensional nonwoven PET/EVOH scaffold by simple adjustments in seeding and culture methods and the scaffold design. The combination of dynamic and static seeding methods resulted in the highest seeding efficiency. Stirring culture allowed cells to proliferate to a greater extent, while opening holes in the scaffold improved cell distribution. Two 1-mm holes were found to be optimal for homogeneous cell proliferation. Different cell types showed similar behavior in the scaffold, indicating the applicability of the established procedure. The nonwoven PET/EVOH scaffold serves as a potential cell culture substrate for efficient cell proliferation.
JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION
(2024)
Article
Engineering, Biomedical
Majid Saeedi, Katayoun Morteza-Semnani, Jafar Akbari, Seyyed Mobin Rahimnia, Fatemeh Ahmadi, Hanieh Choubdari, Amir Lotfi, Seyyed Mohammad Hassan Hashemi
Summary: In this study, kojic acid loaded chitosan/collagen nanoparticles were produced using an ionic gelation and ultrasonic approach to enhance dermal delivery and anti-pigmentation effects. Increasing the amount of collagen in the nanoparticles led to larger particle size and higher entrapment efficiency of kojic acid. The nanoparticles were found to be spherical in shape and kojic acid was in an amorphous form. Skin permeability tests showed that the nanoparticles delivered more kojic acid to the dermal layers compared to plain gel. The nanoparticles were non-toxic and non-irritating, and exhibited stronger inhibition of melanin formation compared to free kojic acid. These findings suggest that the produced nanoparticles have potential as a nano-vehicle for dermal administration of kojic acid, providing new options for managing hyper-melanogenesis problems.
JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION
(2024)
Article
Engineering, Biomedical
Hue Thi Nguyen, Anh-Tuan Le, Thanh Thuy Nguyen, Tran Quang Huy, Thuy Thi Thu Nguyen
Summary: In this study, a chitosan and emodin formulation was prepared to enhance the solubility of emodin and exhibited synergic antibacterial activity against drug-resistant bacterial strains. The enhanced solubility of the formulation suggests its potential as a candidate for the treatment of infectious diseases caused by drug-resistant bacterial pathogens.
JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION
(2024)
Article
Engineering, Biomedical
Jiu Ge, Mengting Li, Jiahui Fan, Christian Celia, Yijun Xie, Qing Chang, Xiaoyong Deng
Summary: Bacterial infections pose a significant threat to human health, and the emergence of multidrug-resistant bacteria has reduced the effectiveness of antibacterial treatments. In this study, chitosan/silver nanoparticle complexes were developed to inhibit bacterial proliferation and induce membrane damage. The results demonstrated that increasing the chitosan concentration enhanced the antibacterial impact, and the nanoparticles showed broad-spectrum antimicrobial activity. The study provides valuable insights into the development of nano-antibacterial agents as a potential substitute for traditional antibiotics in medical applications.
JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION
(2024)