Authors:
A. Prado Universidade Estadual de Campinas Instituto de Química Caixa Postal 6154 13083-970 Campinas, Săo Paulo Brasil Caixa Postal 6154 13083-970 Campinas, Săo Paulo Brasil

Search for other papers by A. Prado in
Current site
Google Scholar
PubMed
Close
,
J. Sales Universidade Estadual de Campinas Instituto de Química Caixa Postal 6154 13083-970 Campinas, Săo Paulo Brasil Caixa Postal 6154 13083-970 Campinas, Săo Paulo Brasil

Search for other papers by J. Sales in
Current site
Google Scholar
PubMed
Close
, and
C. Airoldi Universidade Estadual de Campinas Instituto de Química Caixa Postal 6154 13083-970 Campinas, Săo Paulo Brasil Caixa Postal 6154 13083-970 Campinas, Săo Paulo Brasil

Search for other papers by C. Airoldi in
Current site
Google Scholar
PubMed
Close
Restricted access

Abstract  

Commercial humic acid (HA) was anchored onto silica gel (SiAPTS) previously modified with 3-aminopropyltrimethoxysilane (APTS). HA was anchored onto SiAPTS through two routes: adsorption and covalent chemical immobilization onto the surface. The adsorption occurred by adding SiAPTS to HA in an aqueous solution, producing SiHA1, while chemical immobilization was performed by reacting HA suspended in N,N-dimethylformamide with SiAPTS, to yield SiHA2. The infrared spectra confirm HA immobilization using both procedures and the termogravimetric results showed that the anchored compounds have significantly thermal stability increased. While natural HA presents a thermal stability up to 200C, the anchored compound presents a thermal stability near to 750C.

  • Collapse
  • Expand

To see the editorial board, please visit the website of Springer Nature.

Manuscript Submission: HERE

For subscription options, please visit the website of Springer Nature.

Journal of Thermal Analysis and Calorimetry
Language English
Size A4
Year of
Foundation
1969
Volumes
per Year
1
Issues
per Year
24
Founder Akadémiai Kiadó
Founder's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher
Chief Executive Officer, Akadémiai Kiadó
ISSN 1388-6150 (Print)
ISSN 1588-2926 (Online)

Monthly Content Usage

Abstract Views Full Text Views PDF Downloads
Nov 2023 2 2 0
Dec 2023 18 0 0
Jan 2024 35 0 0
Feb 2024 10 0 0
Mar 2024 6 0 0
Apr 2024 2 0 0
May 2024 0 0 0