Synthesis of pH-responsive block copolymer micelles via RAFT polymerization induced self-assembly and its application in emulsifier-free emulsion polymerization

Zhou, Jianhua; Wang, Lin; Zha, Xianghua; Wang, Hailong

doi:10.1080/10426507.2019.1655419

Cited by 4 publications

(2 citation statements)

References 33 publications

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“…On the contrary, at pH 9 the PNIPAM block and PDMAEMA block would transform from hydrophilic to more hydrophobic when the temperature increased, and thus, they would occupy the core of the micelles since the shell of the micelles also preferred the hydrophobic interaction (Scheme 2). This could make the micelles unstable and form a cluster of micelles [33].…”

Section: Ph-responsive Properties Of Pnipam-b-pdmaema Block Copolymersmentioning

confidence: 99%

Thermo- and pH-Responsive Behavior of Poly(<i>N</i>-isopropylacrylamide)-Block-Poly[(2-dimethylamino)ethyl Methacrylate]

Nizardo,

Fadhilah,

Anggraningrum

2023

Indones. J. Chem.

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The influence of poly(2-dimethylamino)ethyl methacrylate (PDMAEMA) block on the thermo- and pH-responsive behavior of poly(N-isopropyl acrylamide)-block-poly[(2-dimethylamino)ethyl methacrylate)] (PNIPAM-b-PDMAEMA) was studied. The block copolymers were synthesized using reversible addition-fragmentation chain transfer (RAFT) polymerization by varying the chain length of the second block (PDMAEMA). 1H-NMR and FTIR spectra confirmed the formation of block copolymers PNIPAM21-b-PDMAEMA2 and PNIPAM21-b-PDMAEMA7 with the corresponding molar masses from the GPC data. Thermo- and pH-responsive behavior of block copolymers was investigated in phosphate buffer with various pHs. Interesting results showed that the hydrophilic carboxyl end group and the hydrophobic dodecyl end group of the RAFT agent affected the resulting phase transition temperature (Tc), while the Tc was found to be low in the acidic environment. Moreover, larger particle sizes of PNIPAM21‑b‑PDMAEMA2 were found with a pH of 9. It is noteworthy, that the resulted block copolymers might have the potential use in a drug delivery system.

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Section: Ph-responsive Properties Of Pnipam-b-pdmaema Block Copolymersmentioning

confidence: 99%

Thermo- and pH-Responsive Behavior of Poly(<i>N</i>-isopropylacrylamide)-Block-Poly[(2-dimethylamino)ethyl Methacrylate]

Nizardo,

Fadhilah,

Anggraningrum

2023

Indones. J. Chem.

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“…Atualmente, a aplicação de polímeros responsivos a estímulos externos, como a variação de temperatura e de pH têm sido muito explorada 35,40,[56][57][58] . Alguns exemplos de polímeros termoresponsivos são a poli(N-isopropilacrilamida) (PNIPAm) 59,60 , poli(metacrilato de oligo(etileno glicol) metil éter) (POEGMA) 35,58,61 , poli[metacrilato de di(etileno glicol) metil éter] (PDEGMA) 58,62 , poli(metacrilato de dimetilamino etila) (PDMAEMA) 60,62,63 , poli(metil vinil éter) (PMVE) 62 e poli(2isopropenil-2-oxazolina) (PiPOx) 62,64 .…”

Section: Copolímeros Termoresponsivosunclassified

Copolímeros tribloco responsivos à temperatura e pH

de Morais Zanata

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Agradeço à professora Maria Isabel Felisberti pela orientação, pelas oportunidades, por todo o aprendizado e por compartilhar suas experiências. Aos meus pais, Marcia e Julio Cesar, que não mediram esforços para que eu conquistasse meus sonhos e chegasse até aqui. Serei eternamente grata a vocês. Ao querido Lucas que esteve ao meu lado em todos os momentos durante essa jornada, pelo amor, carinho e por me inspirar a ser sempre melhor. Aos amigos do laboratório I-114 pela convivência, pelas conversas enriquecedoras, por toda ajuda e paciência e, claro, por todas as risadas que tornam felizes mesmo os dias mais árduos. A todos os professores e funcionários do IQ, que direta ou indiretamente contribuíram muito no desenvolvimento deste trabalho. Ao Instituto de Química e ao laboratório LNNano do CNPEM pela infraestrutura e suporte à pesquisa. Agradeço à Fundação de Amparo à Pesquisa do Estado de São Paulo -FAPESP (processos n° 2017/24938-9 e 2015/25406-5) pelo financiamento do projeto. O presente trabalho foi realizado com apoio da Coordenação de Aperfeiçoamento de Pessoal de Nível Superior -Brasil (CAPES) -Código de Financiamento 001. "A menos que modifiquemos a nossa maneira de pensar, não seremos capazes de resolver os problemas causados pela forma como nos acostumamos a ver o mundo."

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Measurement methods of particle size distribution in emulsion polymerization

Zhang

Shang

et al. 2021

Chinese Journal of Chemical Engineering

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Synthesis of pH-responsive block copolymer micelles via RAFT polymerization induced self-assembly and its application in emulsifier-free emulsion polymerization

Cited by 4 publications

References 33 publications

Thermo- and pH-Responsive Behavior of Poly(<i>N</i>-isopropylacrylamide)-Block-Poly[(2-dimethylamino)ethyl Methacrylate]

Thermo- and pH-Responsive Behavior of Poly(<i>N</i>-isopropylacrylamide)-Block-Poly[(2-dimethylamino)ethyl Methacrylate]

Copolímeros tribloco responsivos à temperatura e pH

Measurement methods of particle size distribution in emulsion polymerization

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