Hyperbranched polymers with thermoresponsive property highly sensitive to ions

Langmuir : the ACS Journal of Surfaces and Colloids
Xun-Yong LiuShi-Chun Jiang

Abstract

The salt effects on the water solubility of thermoresponsive hyperbranched polyethylenimine and polyamidoamine possessing large amounts of isobutyramide terminal groups (HPEI-IBAm and HPAMAM-IBAm) were studied systematically. Eight anions with sodium as the counterion and ten cations with chloride as the counterion were used to measure the anion and cation effects on the cloud point temperature (T(cp)) of these dendritic polymers in water. It was found that the T(cp) of these dendritic polymers was much more sensitive to the addition of salts than that of the traditional thermoresponsive linear polymers. At low anion concentration, the electrostatic interaction between anions and the positively charged groups of these polymers was dominant, resulting in the unusual anion effect on the T(cp) of these polymers in water, including (1) T(cp) of these dendritic polymers decreasing nonlinearly with the increase of kosmotropic anion concentration; (2) the chaotropic anions showing abnormal salting-out property at low salt concentration and the stronger chaotropes having much pronounced salting-out ability; (3) anti-Hofmeister ordering at low salt concentration. At moderate to high salt concentration, the specific ranking of these anio...Continue Reading

References

Nov 1, 1985·Quarterly Reviews of Biophysics·K D Collins, M W Washabaugh
Oct 1, 1996·Biophysical Journal·R L Baldwin
Aug 1, 1997·Quarterly Reviews of Biophysics·M G CacaceJ J Ramsden
Mar 17, 2001·Science·M F Kropman, H J Bakker
Nov 3, 2001·Physical Review Letters·M BoströmB W Ninham
Jul 19, 2003·Science·Anne Willem OmtaHuib J Bakker
Jun 5, 1965·Journal of the American Chemical Society·D R ROBINSON, W P JENCKS
Feb 20, 2004·Journal of the American Chemical Society·Joseph D BatchelorGary J Pielak
Aug 26, 2004·Journal of the American Chemical Society·Marc C GurauPaul S Cremer
Oct 8, 2004·Journal of the American Chemical Society·Yasuhiro HabaKenji Kono
Jan 22, 2005·Science·Jaya L MohananStephanie L Brock
Mar 9, 2005·Langmuir : the ACS Journal of Surfaces and Colloids·M BoströmB W Ninham
Oct 13, 2005·Journal of the American Chemical Society·Yanjie ZhangPaul S Cremer
Oct 20, 2005·Journal of the American Chemical Society·Sivakumar V AathimanikandanS Thayumanavan
Apr 13, 2006·Chemical Reviews·Sandhya GopalakrishnanMary Jane Shultz
Apr 13, 2006·Chemical Reviews·Pavel Jungwirth, Douglas J Tobias
May 17, 2006·Langmuir : the ACS Journal of Surfaces and Colloids·Yohei TonoKenji Kono
Jun 22, 2006·Journal of the American Chemical Society·Zhifeng JiaDeyue Yan
Sep 19, 2006·Proceedings of the National Academy of Sciences of the United States of America·Laurel M Pegram, M Thomas Record
Oct 13, 2006·Current Opinion in Chemical Biology·Yanjie Zhang, Paul S Cremer
Sep 21, 2007·Journal of the American Chemical Society·Xin ChenPaul S Cremer
Oct 26, 2007·Journal of the American Chemical Society·Jared D SmithPhillip L Geissler
Nov 23, 1995·Nature·R Leberman, A K Soper
Jul 17, 2009·Journal of the American Chemical Society·Feng Guo, Joel M Friedman
Aug 27, 2009·Proceedings of the National Academy of Sciences of the United States of America·Yanjie Zhang, Paul S Cremer
Feb 27, 2010·The Journal of Physical Chemistry. B·Yi HouGuangzhao Zhang
May 19, 2011·Macromolecular Rapid Communications·Meta M BloksmaUlrich S Schubert

❮ Previous
Next ❯

Citations

Oct 30, 2014·Advanced Healthcare Materials·Ji LiuChristine Jérôme
Feb 26, 2015·Langmuir : the ACS Journal of Surfaces and Colloids·Anna Jakubowska
Apr 23, 2014·Soft Matter·Zilu WangXuehao He
Jan 4, 2018·Macromolecular Rapid Communications·Gaixia CaoJinqiang Jiang
May 28, 2014·Journal of Materials Chemistry. B, Materials for Biology and Medicine·Fuyuan DingXiaowen Shi
Dec 5, 2012·Langmuir : the ACS Journal of Surfaces and Colloids·Longyu LiS Thayumanavan
Jul 25, 2019·Langmuir : the ACS Journal of Surfaces and Colloids·Yuchong Zhang, Walter G Chapman

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.