scholarly journals Cellulose‐Based Hybrid Aerogels: Strategies toward Design and Functionality (Adv. Mater. 51/2021)

2021 ◽  
Vol 33 (51) ◽  
pp. 2170401
Author(s):  
Vahid Rahmanian ◽  
Tahira Pirzada ◽  
Siyao Wang ◽  
Saad A. Khan
Keyword(s):  
Hybrid Aerogels

Hierarchical Interface Engineering for Advanced Nanocellulosic Hybrid Aerogels with High Compressibility and Multifunctionality

2021 ◽  
pp. 2009349
Author(s):  
Junyan Zhang ◽  
Yanhua Cheng ◽  
Chengjian Xu ◽  
Mengyue Gao ◽  
Meifang Zhu ◽  
...  
Keyword(s):  
Interface Engineering ◽  
Hybrid Aerogels

Hierarchically Organized Biomimetic Architectured Silk Fibroin–Ceramic-Based Anisotropic Hybrid Aerogels for Thermal Energy Management

2021 ◽  
Vol 22 (4) ◽  
pp. 1739-1751
Author(s):  
Hajar Maleki ◽  
Thomas Fischer ◽  
Christoph Bohr ◽  
Jaqueline Auer ◽  
Sanjay Mathur ◽  
...  
Keyword(s):  
Energy Management ◽  
Silk Fibroin ◽  
Thermal Energy ◽  
Hybrid Aerogels

Polyimide-Silica Hybrid Aerogels with High Mechanical Strength for Thermal Insulation Applications

2011 ◽  
Vol 1306 ◽  
Author(s):  
Wenting Dong ◽  
Wendell Rhine ◽  
Shannon White
Keyword(s):  
Thermal Conductivity ◽  
High Performance ◽  
Ambient Conditions ◽  
Separation Membranes ◽  
Low Dielectric ◽  
Aging Conditions ◽  
Hybrid Aerogels ◽  
Mechanical Strengths ◽  
The Relationship ◽  
Silica Hybrid

ABSTRACTHigh performance polyimides have been widely investigated as materials with excellent thermal, mechanical, and electronic properties due to their highly rigid structures. Aspen has developed an approach to prepare polyimide aerogels which have applications as low dielectric constant materials, separation membranes, catalyst supports and insulation materials. In this paper, we will discuss the preparation of polyimide-silica hybrid aerogel materials with good mechanical strengths and low thermal conductivities. The polyimide-silica hybrid aerogels were made by a two-step process and the materials were characterized to determine thermal conductivity and compressive strength. Results show that compressive moduli of the polyimide-silica hybrid aerogels increase dramatically with density (power law relationship). Thermal conductivity of the aerogels is dependent on the aging conditions and density, with the lowest value achieved so far being ~12 mW/m-K at ambient conditions. The relationship between aerogel density and surface area, thermal stability, porosity and morphology of the nanostructure of the polyimide-silica hybrid aerogels are also described in this paper.

Chemically Selective Reactions in Confined Spaces in Hybrid Aerogels

2005 ◽  
Vol 899 ◽  
Author(s):  
Xipeng Liu ◽  
Chunhua Yao ◽  
William M Risen
Keyword(s):  
Amino Acids ◽  
Amino Acid ◽  
Metal Ions ◽  
Chemical Reactions ◽  
Reaction Products ◽  
Spatial Confinement ◽  
Confined Spaces ◽  
Hybrid Silica ◽  
Hybrid Aerogels ◽  
Chemically Selective

AbstractBy employing novel hybrid silica/functional polymer aerogels, control of the course of chemical reactions between reactants confined inside of the aerogels with reactants whose access to the confinement domain is controlled by diffusion has been explored. Thus, monolithic silica/biopolymer hybrid aerogels have been synthesized with coordinated metal ions that can react with amino acids, such as L-cysteine, that are provided externally in a surrounding solution. Metal ions, such as Au(III), that can react in solution with the amino acid to produce one set of products under a given set of stoichiometric or concentration conditions, and a different set of products under a second set of conditions, were selected for incorporation into the aerogel. It was discovered that the course of the reaction can be changed by spatial confinement of the reaction domain in the aerogel. For example, in the case of Au(III) and L-cysteine, the Au(III) ions are confined in nanoscale domains, and when they are reacted with the amino acid, the nature of the reaction products is controlled by diffusion of the L-cysteine into the domains. Exploration of these and related phenomena will be presented.

Hollow carbon spheres/graphene hybrid aerogels as high-performance adsorbents for organic pollution

2019 ◽  
Vol 213 ◽  
pp. 524-532 ◽  
Author(s):  
Pengchao Hou ◽  
Guangjian Xing ◽  
Leyuan Tian ◽  
Gang Zhang ◽  
Hao Wang ◽  
...  
Keyword(s):  
High Performance ◽  
Organic Pollution ◽  
Carbon Spheres ◽  
Hybrid Aerogels ◽  
Hollow Carbon ◽  
Hollow Carbon Spheres

Green synthesis of oriented xanthan gum–graphene oxide hybrid aerogels for water purification

2017 ◽  
Vol 174 ◽  
pp. 392-399 ◽  
Author(s):  
Shunli Liu ◽  
Fang Yao ◽  
Olayinka Oderinde ◽  
Zhihong Zhang ◽  
Guodong Fu
Keyword(s):  
Graphene Oxide ◽  
Green Synthesis ◽  
Water Purification ◽  
Xanthan Gum ◽  
Hybrid Aerogels
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