Results 91 to 100 of about 211,621 (304)

Self‐Seeded Nucleation of PET in a Benign Solvent Yields a High Modulus Aerogel With Ultra‐Low Thermal Conductivity

open access: yesAdvanced Materials, EarlyView.
A new benign solvent (1,3‐diphenylacetone) enables a simple, safe, and sustainable dissolution and gelation method to convert waste PET into low density, monolithic aerogels with high mechanical strength (E = 20 MPa) and remarkably low thermal conductivity (k = 21.9 to 28.9 mW/m·K).
Kira R. Baugh   +9 more
wiley   +1 more source

Utilização de silica em reações de oxidação e esterificação [PDF]

open access: yes, 1998
Dissertação (Mestrado) - Universidade Federal de Santa Catarina, Centro de Ciências Físicas e Matemáticas.O uso de reagentes suportados em sólidos inorgânicos é uma área de investigação permanente e atual em síntese orgânica, que utiliza métodos ...
Zanotto, Sandra Patricia
core  

Preparation of Silica Modified with 2-Mercaptoimidazole and its SorptionProperties of Chromium(III)

open access: yesE-Journal of Chemistry, 2009
Modified silica gel was prepared to remove the heavy metal of chromium(III) from water sample. Silica gel was used as supporting material and the 2-mercaptoimidazole was immobilized onto surface silica so that the silica would have selective properties ...
Harry Budiman   +2 more
doaj   +1 more source

Advances in Magnesium‐Based Thermoelectrics: A Critical Review

open access: yesAdvanced Materials, EarlyView.
Magnesium‐based thermoelectric materials have emerged as promising candidates for low‐to‐mid‐temperature energy conversion due to their abundance, low cost, and competitive performance. This review summarizes recent advances in Mg3X2, MgAgSb, and Mg2X systems, covering transport mechanisms, fabrication strategies, stability challenges, and device ...
Li‐Min Zhang   +5 more
wiley   +1 more source

Entrapment of glucoamylase by sol-gel technique in PhTES/TEOS hybrid matrixes

open access: yes, 2007
Mesoporous silica particles were prepared by the sol-gel method from different alkoxysilane precursors and used as a host matrix for encapsulation of glucoamylase, an enzyme widely used in fermentative industry.
PREDA, GABRIELA   +2 more
core  

Modification of kraft wood-pulp fibre with silica for surface functionalisation

open access: yes, 2008
A new science strategy for natural fibre modification was devised in which glass surface properties would be imparted to wood-derived fibre. The enhancements known from addition of silane reagents to glass fibre–polymer composites could therefore be ...
Nicholson, Brian K.   +11 more
core   +1 more source

Environmentally Benign Bifunctional Solid Acid and Base Catalysts [PDF]

open access: yes, 2014
Solid bifunctional acid–base catalysts were prepared in two ways on an amorphous silica support: (1) by grafting mercaptopropyl units (followed by oxidation to propylsulfonic acid) and aminopropyl groups to the silica surface (NH2–SiO2–SO3H), and (2) by ...
Shiju, N.R.   +10 more
core   +1 more source

Weaving Intelligence: Thermally Drawn Multimaterial Fibers Toward AI‐Enabled Smart Textiles

open access: yesAdvanced Materials, EarlyView.
Thermally drawn multimaterial fibers are rapidly advancing as intelligent structural units for next‐generation smart textiles. Integrating multimaterial architectures with neuromorphic and spiking‐neural‐network principles enables fabrics that can sense, compute, and adapt autonomously.
Vuong Dinh Trung   +9 more
wiley   +1 more source

Desenvolvimento de metodologia em sistema em fluxo para especiação e determinação de cromo em água usando sílica gel modificada e espectrometria de absorção atômica em chama [PDF]

open access: yes, 2003
Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Ciências Físicas e Matemáticas. Programa de Pós-graduação em Química.Este trabalho descreve o desenvolvimento de um sistema de pré-concentração em fluxo das espécies Cr (III) e Cr
Maltez, Heloisa França
core  

Ultra‐High‐Throughput Discovery of Multifunctional Polyphenolic Coatings on Droplet Microarrays

open access: yesAdvanced Materials, EarlyView.
An ultra‐high‐throughput (UHT) combinatorial strategy enables the miniaturized synthesis and screening of ≈30 000 polyamine‐polyphenolic (PaPp) coatings using droplet microarrays (DMA). This approach reveals hundreds of previously unknown fluorescent, redox‐active, and antibacterial materials, including multifunctional, cell‐compatible surfaces ...
Vania Tanda Widyaya   +11 more
wiley   +1 more source

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