Peroxide Induced Reaction as a Cross-Linking Method in PHBV Biomaterial Gate Dielectrics

2018 ◽  
Vol 777 ◽  
pp. 75-79
Author(s):  
Kun Yan Wang
Keyword(s):  
Thin Films ◽  
Thermal Stability ◽  
Low Temperature ◽  
Gate Dielectrics ◽  
Cross Linking ◽  
Smooth Surfaces ◽  
Plastic Substrates ◽  
Flexible Electronic ◽  
The Cross ◽  
Induced Reaction

A peroxide induced reaction was applied as a cross-linking method for Poly (3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) biomaterial gate dielectrics. PHBV was effectively cross-linked with a peroxide inducer at a relatively low temperature (90°C). The cross-linked microstructures improve the thermal stability compared with uncross-linked PHBV. This peroxide induced cross-linking method was compatible with plastic substrates for flexible electronic applications. The cross-linked PHBV thin films displayed smooth surfaces.

Planarization and Dielectric Properties of Thin Photosensitive and Nonphotosensitive BCB

2004 ◽  
Vol 1 (2) ◽  
pp. 47-52
Author(s):  
Brian Dusch ◽  
Paul A. Kohl
Keyword(s):  
Thin Films ◽  
Dielectric Properties ◽  
Thick Films ◽  
Cross Linking ◽  
Low Loss ◽  
The Cross

Thin films (0.2 μm to 1.8 μm) of photosensitive and nonphotosensitive BCB were fabricated and the degree of planarization (DOP) and dielectric properties were investigated. It was found that a high DOP for wide spaces (>20 μm spaces with 1 μm of BCB) was possible with nonphotosensitive BCB but not photosensitive BCB because of the cross-linking reaction during the photo-process. Thin films (as thin as 0.2 μm) exhibited dielectric properties similar to thick films. The dielectric properties of the photosensitive BCB were slightly higher than nonphotosensitive BCB. Low loss properties were observed at all thickness.

Low-Temperature Cross-Linking Benzocyclobutene Based Polymer Dielectric for Organic Thin Film Transistors on Plastic Substrates

2019 ◽  
Vol 85 (1) ◽  
pp. 277-283 ◽  
Author(s):  
Rawad K. Hallani ◽  
Maximilian Moser ◽  
Helen Bristow ◽  
Maud V. C. Jenart ◽  
Hendrik Faber ◽  
...  
Keyword(s):  
Thin Film ◽  
Low Temperature ◽  
Thin Film Transistors ◽  
Organic Thin Film Transistors ◽  
Cross Linking ◽  
Organic Thin Film ◽  
Plastic Substrates ◽  
Polymer Dielectric

Study on Physicochemical Properties of Tilapia Skin Collagen Scaffold Cross-Linked by EDC

2012 ◽  
Vol 538-541 ◽  
pp. 2232-2235
Author(s):  
Zhou Wei Duan ◽  
Xuan Ri Shen ◽  
Peng Li ◽  
Guang Hua Xia ◽  
Zhe Liu
Keyword(s):  
Thermal Stability ◽  
Physicochemical Properties ◽  
Water Uptake ◽  
Collagen Scaffold ◽  
Cross Linking ◽  
Shrinkage Temperature ◽  
Skin Collagen ◽  
The Cross ◽  
The Difference ◽  
Temperature Water

In order to improve physicochemical properties of Tilapia skin collagen (TSC), 1-ethyl-3-(3-dimethyl amino-propyl)-carbodiimide (EDC) was used as a cross-linking agent for TSC matrices. The difference in physicochemical properties between cross-linked and uncross-linked TSC was characterized by measuring shrinkage temperature, water uptake and anti-enzyme effect. The results indicated that, after the cross-linking, the thermal stability was increased; the anti-enzyme effect was improved obviously. It is thus concluded that the EDC cross-linking greatly improve the physicochemical properties of TSC.

Low temperature cross-linked, high performance polymer gate dielectrics for solution-processed organic field-effect transistors

2015 ◽  
Vol 6 (32) ◽  
pp. 5884-5890 ◽  
Author(s):  
Shengxia Li ◽  
Linrun Feng ◽  
Jiaqing Zhao ◽  
Xiaojun Guo ◽  
Qing Zhang
Keyword(s):  
Low Temperature ◽  
Field Effect ◽  
High Performance ◽  
Gate Dielectric ◽  
Gate Dielectrics ◽  
Field Effect Transistors ◽  
Cross Linking ◽  
Organic Field Effect Transistors ◽  
Solution Processed ◽  
High Performance Polymer

Thermal cross-linking the bi-functional polymer thin-films at low temperature for gate dielectric application in solution processed organic field-effect transistors.

Characterization of Thermal Reversible Cross-Linking Agents for Flexible Poly(vinyl chloride)

2014 ◽  
Vol 900 ◽  
pp. 3-6 ◽  
Author(s):  
Jing Wang ◽  
Wei Fang ◽  
Yuan Yuan ◽  
Xiao Ming Liu
Keyword(s):  
Thermal Stability ◽  
Vinyl Chloride ◽  
Congo Red ◽  
Cross Linking ◽  
Gel Content ◽  
Ethyl Mercaptan ◽  
Poly Vinyl Chloride ◽  
The Cross ◽  
Thermal Stability Of

In order to improve thermal stability of Poly (Vinyl Chloride), a kind of thermal reversible cross-linking agents, the end cyclopentadienyl ethanethiol salts, sodium cyclopentadienyl ethyl mercaptan (CPD-C2H4SNa) was synthesized in this paper. The DSC results proved that the prepared CPD-C2H4SNa has obvious thermal reversible characteristics and the thermal reversible temperature was at 177 °C. The effects of cross-linking agent amount, cross-linking reactive time and temperature on flexible PVC compounds were evaluated through gel content testing. It was showed that the cross-linking agent with 3 Phr is optimum for PVC compounds. Moreover, both the cross-linking reactive time and temperature has effects on gel content of PVC compounds. The gel content of CPD-C2H4SNa cross-linked PVC compounds reaches maximum at 76% for 20 min at 160 °C.The static thermal stability of flexible PVC was measured according to congo red method. The results showed that the thermal stability of PVC compounds was enhanced with increasing cross-linking agent amount.

scholarly journals Gelatin-Based Hydrogels through Homobifunctional Triazolinediones Targeting Tyrosine Residues

Molecules ◽  
2019 ◽  
Vol 24 (3) ◽  
pp. 589 ◽  
Author(s):  
Roberto Guizzardi ◽  
Luca Vaghi ◽  
Marcello Marelli ◽  
Antonino Natalello ◽  
Ivan Andreosso ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Drug Delivery Systems ◽  
Chemical Nature ◽  
Mechanical Stability ◽  
Cross Linking ◽  
Swelling Properties ◽  
Tyrosine Residues ◽  
Cross Linker ◽  
The Cross ◽  
Chemical Cross Linking

Gelatin is a biopolymer with interesting properties that can be useful for biomaterial design for different applications such as drug delivery systems, or 3D scaffolds for tissue engineering. However, gelatin suffers from poor mechanical stability at physiological temperature, hence methods for improving its properties are highly desirable. In the present work, a new chemical cross-linking strategy based on triazolinedione ene-type chemistry towards stable hydrogel is proposed. Two different homobifunctional 1,2,4-triazoline-3,5(4H)-diones, namely 4,4′-hexane-1,6-diylbis(3H-1,2,4-triazoline-3,5(4H)-dione) 1 and 4,4′-[methylenebis(4,1-phenylene)]bis(3H-1,2,4-triazoline-3,5(4H)-dione) 2 were used as cross-linkers in different ratio to tyrosine residues in gelatin. The reaction was proved effective in all experimented conditions and hydrogels featured with different thermal stability were obtained. In general, the higher the cross-linker/tyrosine ratio, the more thermostable the hydrogel. The swelling properties are strictly dependent upon the chemical nature of the cross-linker.

scholarly journals Stability of Collagen Scaffold Implants for Animals with Iatrogenic Articular Cartilage Defects

2009 ◽  
Vol 78 (4) ◽  
pp. 643-648 ◽  
Author(s):  
Josef Jančář ◽  
Lucy Vojtová ◽  
Alois Nečas ◽  
Robert Srnec ◽  
Lucie Urbanová ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Block Copolymer ◽  
Degradation Rate ◽  
Articular Surface ◽  
Water Soluble ◽  
Cartilage Defects ◽  
Cross Linking ◽  
Time Interval ◽  
Porous Scaffolds ◽  
The Cross

Synthesis and characterization of biodegradable hydrogels based on collagen modified by addition of synthetic biodegradable copolymer intended for preparation of porous scaffolds for mesenchymal stem cells used for possible implantation to animals with articular surface defects was investigated. The synthetic biodegradable tri-block copolymer used was the block copolymer of polyethylene glycol (PEG), polylactic acid (PLA), polyglycolic acid (PGA) (PEG-PLGA) endcapped with itaconic acid (ITA). The water-soluble carbodiimide and N-hydroxysuccimide system (EDC-NHS) was chosen as the cross-linking agent used to control the rate of hydrogel resorption. Dependence of the physical properties of the prepared hydrogels on the concentration of the EDC-NHS cross-linker, reaction time and concentration of PEG-PLGA-ITA copolymer was examined. Swelling behaviour, thermal stability, surface morphology and degradation rate were also characterized. Based on the obtained results, it can be concluded that increase in concentration of the cross-linking agent, as well as prolonged cross-linking time and increased amount of synthetic copolymer lead to enhanced thermal stability of the gels together with a reduced swelling ratio and degradation rate in saline. The resorption rate of these gels used in preparation of cartilage scaffolds can be controlled over a wide time interval by varying the collagen/(PEG-PLGA-ITA) blend composition or the conditions of the cross-linking reaction.

scholarly journals Robust nano-architectured composite thin films for a low-temperature solid oxide fuel cell cathode

2016 ◽  
Vol 4 (24) ◽  
pp. 9394-9402 ◽  
Author(s):  
Han Gil Seo ◽  
Yoonseok Choi ◽  
Bonjae Koo ◽  
Ahreum Jang ◽  
WooChul Jung
Keyword(s):  
Thin Films ◽  
Thermal Stability ◽  
Fuel Cell ◽  
Low Temperature ◽  
Electrochemical Deposition ◽  
Oxide Coating ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Pt Electrodes ◽  
Fuel Cell Cathode

Nano-precipitates of Sm-doped CeO2 were uniformly coated onto porous Pt thin films via cathodic electrochemical deposition. Deposition of only 5 min created an oxide coating that increased the values of the electrode conductance by more than two orders of magnitude and provided outstanding thermal stability even at 600 °C for more than 100 h compared to the bare Pt electrodes.

The dielectric properties of low temperature thermally cross-linked polystyrene and poly(methyl methacrylate) thin films

RSC Advances ◽  
2015 ◽  
Vol 5 (37) ◽  
pp. 28980-28984 ◽  
Author(s):  
Shengxia Li ◽  
Qing Zhang
Keyword(s):  
Thin Films ◽  
Dielectric Properties ◽  
Low Temperature ◽  
Methyl Methacrylate ◽  
Cross Linking ◽  
Poly Methyl Methacrylate

Thermal cross-linking polystyrene and poly(methyl methacrylate) thin-films with 1,3,5-tris(2-propynyloxy)benzene at low temperature for dielectric applications.

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