Hydrogels of cellulose acetate crosslinked with pyromellitic dianhydride: part I: synthesis and swelling kinetics
This work describes the synthesis of hydrogels of cellulose acetate (AC) crosslinked with 1,2,4,5-benzenotetracarboxylic dianhydride (PMDA). The crosslinking reaction was monitored by FTIR. Analysis of aromatic fragments from the alkaline hydrolysis of the gels by UV spectroscopy indicated that an i...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Sociedade Brasileira de Química
2013-01-01
|
| Series: | Química Nova |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422013000100019 |
| _version_ | 1819294983424835584 |
|---|---|
| author | Víctor A. Oliveira Tácia C. Veloso Versiane A. Leão Cláudio G. dos Santos Vagner R. Botaro |
| author_facet | Víctor A. Oliveira Tácia C. Veloso Versiane A. Leão Cláudio G. dos Santos Vagner R. Botaro |
| author_sort | Víctor A. Oliveira |
| collection | DOAJ |
| description | This work describes the synthesis of hydrogels of cellulose acetate (AC) crosslinked with 1,2,4,5-benzenotetracarboxylic dianhydride (PMDA). The crosslinking reaction was monitored by FTIR. Analysis of aromatic fragments from the alkaline hydrolysis of the gels by UV spectroscopy indicated that an increase in the stoichiometric ratio of dianhydride resulted in higher degrees of crosslinking. The non-porous nature of the gels was confirmed by analysis of nitrogen adsorption. Water absorption isotherms showed that as the temperature and degree of crosslinking increased, the percentage of water absorbed at equilibrium (%Seq) also increased. The hydrogels presented second order swelling kinetics. |
| first_indexed | 2024-12-24T04:34:59Z |
| format | Article |
| id | doaj.art-7b72c45be3704b6f80766da399b230e9 |
| institution | Directory Open Access Journal |
| issn | 0100-4042 1678-7064 |
| language | English |
| last_indexed | 2024-12-24T04:34:59Z |
| publishDate | 2013-01-01 |
| publisher | Sociedade Brasileira de Química |
| record_format | Article |
| series | Química Nova |
| spelling | doaj.art-7b72c45be3704b6f80766da399b230e92022-12-21T17:15:13ZengSociedade Brasileira de QuímicaQuímica Nova0100-40421678-70642013-01-01361102106Hydrogels of cellulose acetate crosslinked with pyromellitic dianhydride: part I: synthesis and swelling kineticsVíctor A. OliveiraTácia C. VelosoVersiane A. LeãoCláudio G. dos SantosVagner R. BotaroThis work describes the synthesis of hydrogels of cellulose acetate (AC) crosslinked with 1,2,4,5-benzenotetracarboxylic dianhydride (PMDA). The crosslinking reaction was monitored by FTIR. Analysis of aromatic fragments from the alkaline hydrolysis of the gels by UV spectroscopy indicated that an increase in the stoichiometric ratio of dianhydride resulted in higher degrees of crosslinking. The non-porous nature of the gels was confirmed by analysis of nitrogen adsorption. Water absorption isotherms showed that as the temperature and degree of crosslinking increased, the percentage of water absorbed at equilibrium (%Seq) also increased. The hydrogels presented second order swelling kinetics.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422013000100019cellulose acetatehydrogelPMDA |
| spellingShingle | Víctor A. Oliveira Tácia C. Veloso Versiane A. Leão Cláudio G. dos Santos Vagner R. Botaro Hydrogels of cellulose acetate crosslinked with pyromellitic dianhydride: part I: synthesis and swelling kinetics Química Nova cellulose acetate hydrogel PMDA |
| title | Hydrogels of cellulose acetate crosslinked with pyromellitic dianhydride: part I: synthesis and swelling kinetics |
| title_full | Hydrogels of cellulose acetate crosslinked with pyromellitic dianhydride: part I: synthesis and swelling kinetics |
| title_fullStr | Hydrogels of cellulose acetate crosslinked with pyromellitic dianhydride: part I: synthesis and swelling kinetics |
| title_full_unstemmed | Hydrogels of cellulose acetate crosslinked with pyromellitic dianhydride: part I: synthesis and swelling kinetics |
| title_short | Hydrogels of cellulose acetate crosslinked with pyromellitic dianhydride: part I: synthesis and swelling kinetics |
| title_sort | hydrogels of cellulose acetate crosslinked with pyromellitic dianhydride part i synthesis and swelling kinetics |
| topic | cellulose acetate hydrogel PMDA |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422013000100019 |
| work_keys_str_mv | AT victoraoliveira hydrogelsofcelluloseacetatecrosslinkedwithpyromelliticdianhydridepartisynthesisandswellingkinetics AT taciacveloso hydrogelsofcelluloseacetatecrosslinkedwithpyromelliticdianhydridepartisynthesisandswellingkinetics AT versianealeao hydrogelsofcelluloseacetatecrosslinkedwithpyromelliticdianhydridepartisynthesisandswellingkinetics AT claudiogdossantos hydrogelsofcelluloseacetatecrosslinkedwithpyromelliticdianhydridepartisynthesisandswellingkinetics AT vagnerrbotaro hydrogelsofcelluloseacetatecrosslinkedwithpyromelliticdianhydridepartisynthesisandswellingkinetics |