scholarly journals Cellulose Nanofibril Aerogels: Synergistic Improvement of Hydrophobicity, Strength, and Thermal Stability via Cross-Linking with Diisocyanate

2017 ◽  
Vol 9 (3) ◽  
pp. 2825-2834 ◽  
Author(s):  
Feng Jiang ◽  
You-Lo Hsieh
Keyword(s):  
Thermal Stability ◽  
Cross Linking ◽  
Cellulose Nanofibril

scholarly journals High wet-strength, thermally stable and transparent TEMPO-oxidized cellulose nanofibril film via cross-linking with poly-amide epichlorohydrin resin

RSC Advances ◽  
2017 ◽  
Vol 7 (50) ◽  
pp. 31567-31573 ◽  
Author(s):  
Weisheng Yang ◽  
Huiyang Bian ◽  
Liang Jiao ◽  
Weibing Wu ◽  
Yulin Deng ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Water Resistance ◽  
Cellulose Nanofibrils ◽  
Cross Linking ◽  
Oxidized Cellulose ◽  
Thermally Stable ◽  
Cellulose Nanofibril ◽  
Wet Strength

TEMPO-oxidized cellulose nanofibrils (TOCNs) films cross-linked with different dosages of polyamide epichlorohydrin resin (PAE) show a great water-resistance and thermal stability.

scholarly journals Enzymatic and Chemical Cross-Linking of Bacterial Cellulose/Fish Collagen Composites—A Comparative Study

2021 ◽  
Vol 22 (7) ◽  
pp. 3346
Author(s):  
Agata Sommer ◽  
Paulina Dederko-Kantowicz ◽  
Hanna Staroszczyk ◽  
Sławomir Sommer ◽  
Marek Michalec
Keyword(s):  
Thermal Stability ◽  
Bacterial Cellulose ◽  
Secondary Alcohol ◽  
Water Vapor Permeability ◽  
Polymer Chains ◽  
Cross Linking ◽  
Vapor Permeability ◽  
Covalent Bonds ◽  
Fish Collagen ◽  
Chemical Cross Linking

This article compares the properties of bacterial cellulose/fish collagen composites (BC/Col) after enzymatic and chemical cross-linking. In our methodology, two transglutaminases are used for enzymatic cross-linking—one recommended for the meat and the other proposed for the fish industry—and pre-oxidated BC (oxBC) is used for chemical cross-linking. The structure of the obtained composites is characterized by scanning electron microscopy, thermogravimetric analysis, X-ray diffraction, and Fourier transform infrared spectroscopy, and their functional properties by mechanical and water barrier tests. While polymer chains in uncross-linked BC/Col are intertwined by H-bonds, new covalent bonds in enzymatically cross-linked ones are formed—resulting in increased thermal stability and crystallinity of the material. The C2–C3 bonds cleavage in D-glucose units, due to BC oxidation, cause secondary alcohol groups to vanish in favor of the carbonyl groups’ formation, thus reducing the number of H-bonded OHs. Thermal stability and crystallinity of oxBC/Col remain lower than those of BC/Col. The BC/Col formation did not affect tensile strength and water vapor permeability of BC, but enzymatic cross-linking with TGGS improved them significantly.

A physical cross-linking process of cellulose nanofibril gels with shear-controlled fibril orientation

Soft Matter ◽  
2013 ◽  
Vol 9 (6) ◽  
pp. 1852-1863 ◽  
Author(s):  
Andreas B. Fall ◽  
Stefan B. Lindström ◽  
Joris Sprakel ◽  
Lars Wågberg
Keyword(s):  
Cross Linking ◽  
Cellulose Nanofibril

Cross-linking of atoms and thermal stability of new MDF compositions

1996 ◽  
Vol 46 (2) ◽  
pp. 479-487 ◽  
Author(s):  
M. Drábik ◽  
Lubica Gáliková ◽  
Zuzana Sadleková ◽  
Mária Kubranová
Keyword(s):  
Thermal Stability ◽  
Cross Linking ◽  
Thermal Stability Of

scholarly journals Use of Grafted Voltage Stabilizer to Enhance Dielectric Strength of Cross-Linked Polyethylene

Polymers ◽  
2019 ◽  
Vol 11 (1) ◽  
pp. 176 ◽  
Author(s):  
Wei Dong ◽  
Xuan Wang ◽  
Bo Tian ◽  
Yuguang Liu ◽  
Zaixing Jiang ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Breakdown Strength ◽  
Dielectric Strength ◽  
Voltage Stabilizer ◽  
Cross Linking ◽  
Practical Application ◽  
Electrical Tree ◽  
Research Goal ◽  
The Stability ◽  
New Research

Aromatic voltage stabilizers can improve the dielectric properties of cross-linked polyethylene (XLPE); however, their poor compatibility with XLPE hinders their practical application. Improving the compatibility of aromatic voltage stabilizers with XLPE has, therefore, become a new research goal. Herein 1-(4-vinyloxy)phenylethenone (VPE) was prepared and characterized. It can be grafted onto polyethylene molecules during the cross-linking processes to promote stability of the aromatic voltage stabilizers in XLPE. Fourier transform infrared spectroscopy confirmed that VPE was successfully grafted onto XLPE, and effectively inhibited thermal migration. Thermogravimetric analysis showed that the grafted VPE/XLPE composite exhibits a better thermal stability than a VPE/PE blend composite. Evaluation of the electrical properties showed that the breakdown strength and electrical tree initiation voltage of the VPE/XLPE composite were increased by 15.5% and 39.6%, respectively, when compared to those of bare XLPE. After thermal aging, the breakdown strength and electrical tree initiation voltage of the VPE/XLPE composite were increased by 9.4% and 25.8%, respectively, in comparison to those of bare XLPE, which indicates that the grafted voltage stabilizer can effectively inhibit its migration and enhance the stability of the composite material.

scholarly journals Effect of Nanodiamond Particles on Properties of Epoxy Composites

2008 ◽  
Vol 17 (1) ◽  
pp. 096369350801700 ◽  
Author(s):  
Zdeno Špitalský ◽  
Alexander Kromka ◽  
Libor Matějka ◽  
Peter Černoch ◽  
Jana Kovářová ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Epoxy Composites ◽  
Neat Epoxy ◽  
Light Transmittance ◽  
Cross Linking ◽  
Amino Groups ◽  
Multiwalled Carbon ◽  
Epoxy Network ◽  
Epoxy Nanocomposite ◽  
Thermal Stability Of

The epoxy nanocomposites filled with 0.1, 0.5, and 1 wt% nanodiamonds (nanoD) were prepared and their properties were compared with neat epoxy network or epoxy nanocomposite filled with 1 wt% multiwalled carbon nanotubes (MWCNTs). The obtained nanoD-epoxy composites increased significantly thermal stability of prepared nanocomposites in comparison with neat epoxy matrix. The exponential decay of light transmittance with increasing concentration of nanoD in sample was observed. The values of storage modulus G` and glass transition temperature Tg significantly decreased by addition of nanoD to epoxy network. This is caused by inhibition of cross-linking reaction of epoxy- and amino- groups by nanoD.

Influence of the Precursor Cross-Linking Route on the Thermal Stability of Si−B−C−O Ceramics

2008 ◽  
Vol 20 (22) ◽  
pp. 7148-7156 ◽  
Author(s):  
Vladislav Ischenko ◽  
Eckhard Pippel ◽  
Jörg Woltersdorf ◽  
B. Rodrigue Ngoumeni Yappi ◽  
Ralf Hauser ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Cross Linking ◽  
Thermal Stability Of

Transparent konjac glucomannan/cellulose nanofibril composite films with improved mechanical properties and thermal stability

Cellulose ◽  
2019 ◽  
Vol 26 (5) ◽  
pp. 3155-3165 ◽  
Author(s):  
Jinyu Wang ◽  
Xin Chen ◽  
Chenggang Zhang ◽  
Abdul Rehman Akbar ◽  
Zhuqun Shi ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Thermal Stability ◽  
Composite Films ◽  
Konjac Glucomannan ◽  
Cellulose Nanofibril
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