scholarly journals Vitrimers: directing chemical reactivity to control material properties

2020 ◽  
Vol 11 (19) ◽  
pp. 4855-4870 ◽  
Author(s):  
Marc Guerre ◽  
Christian Taplan ◽  
Johan M. Winne ◽  
Filip E. Du Prez
Keyword(s):  
Material Properties ◽  
Chemical Reactivity ◽  
Polymer Materials ◽  
Control Material ◽  
Recent Advances

In this minireview, we survey recent advances in the development of vitrimer materials. Focus on how to chemically control their material properties is used to highlight challenges for boosting the potential of this emerging class of polymer materials.

scholarly journals Recent advances in skin collagen: functionality and non-medical applications

2021 ◽  
Vol 3 (1) ◽  
Author(s):  
Yanting Han ◽  
Jinlian Hu ◽  
Gang Sun
Keyword(s):  
Smart Materials ◽  
High Performance ◽  
Preparation Method ◽  
Chemical Reactivity ◽  
Medical Field ◽  
Recent Advances ◽  
Synthetic Materials ◽  
Skin Collagen ◽  
Promising Area ◽  
Living Organisms

Abstract During nature evolution process, living organisms have gradually adapted to the environment and been adept in synthesizing high performance structural materials at mild conditions by using fairly simple building elements. The skin, as the largest organ of animals, is such a representative example. Conferred by its intricate organization where collagen fibers are arranged in a randomly interwoven network, skin collagen (SC), defined as a biomass derived from skin by removing non-collagen components displays remarkable performance with combinations of mechanical properties, chemical-reactivity and biocompatibility, which far surpasses those of synthetic materials. At present, the application of SC in medical field has been largely studied, and there have been many reviews summarizing these efforts. However, the generalized view on the aspects of SC as smart materials in non-medical fields is still lacking, although SC has shown great potential in terms of its intrinsic properties and functionality. Hence, this review will provide a comprehensive summary that integrated the recent advances in SC, including its preparation method, structure, reactivity, and functionality, as well as applications, particularly in the promising area of smart materials. Graphical abstract

Experimental Measurement and Analysis of Microelectronics Application Polymer Materials Properties

1992 ◽  
Vol 264 ◽  
Author(s):  
Y.H. Jeng ◽  
Mirng-Ji Lii
Keyword(s):  
Thin Film ◽  
Material Properties ◽  
Silicon Substrate ◽  
Coupling Effect ◽  
Measurement Techniques ◽  
Epoxy Adhesive ◽  
Polymer Materials ◽  
Fea Model ◽  
Curvature Measurement ◽  
Substrate Curvature

AbstractA laser based surface scanning technique was utilized to measure the polyimide coated silicon wafer curvature resulting from thermal cycling and mismatch, Meanwhile, mechanical properties of polyimide thin film were characterized by DMA, TMA and tensile test. Based on the obtained material properties, A FEA model was developed to analyze the experimental results -reasonable correlation was obtained.Similar approaches were taken one step further in the MCM silicon substrate curvature measurement. In a MCM package with silicon substrate, epoxy adhesive, and ceramic package, substrate warpage was developed in a thermal cycle due to thermal mismatch between the substrate and the package and coupling effect linked by epoxy adhesive. Three different substrate curvature measurement techniques were applied to identify the substrate curvature and epoxy thin film properties were also well characterized. A 3D FEA model incorporating with the epoxy material properties was developed to analyze the substrate warpage and investigate an optimal package design.

Advances in Oxide-Oxide CMC

1999 ◽  
Author(s):  
Robert A. Jurf ◽  
Steven C. Butner
Keyword(s):  
Material Properties ◽  
Matrix System ◽  
Silicate System ◽  
Evaluation Data ◽  
Test And Evaluation ◽  
Recent Advances ◽  
Alumino Silicate ◽  
Oxide Matrix ◽  
Processing Steps

Recent advances in COI’s oxide-oxide CMC materials will be presented including basic processing steps, updated material properties, and fabrication techniques. Material properties of COI’s alumino-silicate system reinforced with various oxide fabrics will be compared, along with progress in developing a 1200°C oxide matrix system for future turbine system applications. Examples of fabricated hardware, including a subscale combustion liner, will be shown. Recent test and evaluation data will be provided.

Recent advances of thiazole hybrids in biological applications

2019 ◽  
Vol 11 (15) ◽  
pp. 1979-1998 ◽  
Author(s):  
Mehmet Gümüş ◽  
Mehmet Yakan ◽  
İrfan Koca
Keyword(s):  
Biological Activity ◽  
Heterocyclic Compounds ◽  
Chemical Reactivity ◽  
Biological Properties ◽  
The Other ◽  
Hybrid Structures ◽  
Thiazole Ring ◽  
Biological Applications ◽  
Recent Advances ◽  
Recent Developments

Thiazoles have attracted much synthetic interest due to their wide variety of biological properties and are important members of heterocyclic compounds. In recent years, studies on the synthesis of thiazole compounds have been increasing because of the properties of this core. In particular, the hybrid structures in which the thiazole ring and the other nuclei are linked have gained popularity. Hybrid structures are formed by the combination of different groups of chemical reactivity and biological activity characteristics. In this review, we highlight recent developments related to hybrid structures containing a thiazole core, recently developed as anticancer, antibacterial, anti-inflammatory, analgesic, anti-tubercular, antialzheimer and antidiabetic compounds.

Chemical Approaches in Processing Wheat Gluten-Based Polymer Materials

2014 ◽  
Vol 67 (1) ◽  
pp. 6 ◽  
Author(s):  
Xiaoqing Zhang
Keyword(s):  
Research And Development ◽  
Mechanical Strength ◽  
Biodegradable Polymer ◽  
Material Properties ◽  
Wheat Gluten ◽  
Protein Structures ◽  
Barrier Properties ◽  
Polymer Materials ◽  
Chemical Modifications ◽  
Close Collaboration

Processing wheat gluten-based renewable and biodegradable polymer materials through chemical modifications has been demonstrated as an effective way to improve the mechanical strength and modulus, material flexibility, barrier properties, and thermal processability, and to introduce new functionalities. Challenges still remain in further enhancing material properties, balancing hydrophilicity/hydrophobicity and biodegradability in the material, achieving a designed performance, and maintaining the material sustainability. A good understanding of protein structures, reactivity, and functionalities of wheat gluten is fundamental for such research and development, and a close collaboration between bio-chemists, polymer chemists, and material scientists is necessary for the approach.

scholarly journals Recent Advances in the Use of Polyhydroyalkanoates in Biomedicine

2019 ◽  
Vol 6 (3) ◽  
pp. 82 ◽  
Author(s):  
Alejandra Rodriguez-Contreras
Keyword(s):  
Tissue Engineering ◽  
Bone Graft ◽  
Material Properties ◽  
Nerve Repair ◽  
Drug Carriers ◽  
Delivery Systems ◽  
The Body ◽  
Recent Advances ◽  
Bone Graft Substitutes ◽  
Insight Into

Polyhydroxyalkanoates (PHAs), a family of natural biopolyesters, are widely used in many applications, especially in biomedicine. Since they are produced by a variety of microorganisms, they possess special properties that synthetic polyesters do not have. Their biocompatibility, biodegradability, and non-toxicity are the crucial properties that make these biologically produced thermoplastics and elastomers suitable for their applications as biomaterials. Bacterial or archaeal fermentation by the combination of different carbohydrates or by the addition of specific inductors allows the bioproduction of a great variety of members from the PHAs family with diverse material properties. Poly(3-hydroxybutyrate) (PHB) and its copolymers, such as poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHVB) or poly(3-hydroxybutyrate-co-4-hydroxybutyrate) (PHB4HB), are the most frequently used PHAs in the field of biomedicine. PHAs have been used in implantology as sutures and valves, in tissue engineering as bone graft substitutes, cartilage, stents for nerve repair, and cardiovascular patches. Due to their good biodegradability in the body and their breakdown products being unhazardous, they have also been remarkably applied as drug carriers for delivery systems. As lately there has been considerable and growing interest in the use of PHAs as biomaterials and their application in the field of medicine, this review provides an insight into the most recent scientific studies and advances in PHAs exploitation in biomedicine.

Role of characterization techniques in evaluating the material properties of nanoparticle-based polymer materials

2020 ◽  
pp. 21-39
Author(s):  
Chandrasekar Muthukumar ◽  
Naveen Jusuarockiam ◽  
Senthil kumar Krishnasamy ◽  
Senthil Muthu Kumar T ◽  
Mohammad Jawaid ◽  
...  
Keyword(s):  
Material Properties ◽  
Polymer Materials ◽  
Characterization Techniques
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