a.Department of Orthopedics, Shanghai Tenth People’s Hospital, Tongji University School of Medicine, Shanghai 200072, China
b.Department of Polymeric Materials, School of Materials Science and Engineering, Key Laboratory of Advanced Civil Engineering Materials of Ministry of Education, Tongji University, Shanghai 201804, China
jzdu@tongji.edu.cn
收稿:2019-07-25,
修回:2019-8-22,
录用:2019-8-26,
网络首发:2019-09-24,
纸质出版:2020-04
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Yang, B.; Du, J. Z. Ultrasound-responsive homopolymer nanoparticles. Chinese J. Polym. Sci. 2020, 38, 349–356
Bo Yang, Jian-Zhong Du. Ultrasound-responsive Homopolymer Nanoparticles[J]. Chinese Journal of Polymer Science, 2020, 38(4): 349-356.
Yang, B.; Du, J. Z. Ultrasound-responsive homopolymer nanoparticles. Chinese J. Polym. Sci. 2020, 38, 349–356 DOI: 10.1007/s10118-020-2345-6.
Bo Yang, Jian-Zhong Du. Ultrasound-responsive Homopolymer Nanoparticles[J]. Chinese Journal of Polymer Science, 2020, 38(4): 349-356. DOI: 10.1007/s10118-020-2345-6.
Noninvasive ultrasound is a more effective strategy for on-demand drug delivery of polymeric nanoparticles than many other stimuli. However
the preparation of ultrasound-responsive homopolymer nanoparticles is still very challenging. In this study
we disclose the regulating factors of ultrasound responsiveness of homopolymer nanoparticles and the disaggregation behavior of homopolymer nanoparticle aggregates. Homopolymer nanoparticles such as vesicles and large compound micelles (LCMs) are self-assembled from poly(methoxyethyl methacrylate) (PMEMA) and poly(amic acid) (PAA)
respectively. The ultrasound responsiveness of PAA vesicles at metastable state could be regulated by tuning the self-assembly temperature (
T
s
)
and was optimized when
T
s
is around the glass transition temperature (
T
g
) of PAA. However
the PMEMA LCMs did not respond to ultrasound as they are at stable state. On the other hand
poly(2-(2-ethoxyethoxy)ethyl acrylate) (PEEA) could self-assemble into vesicle aggregates or complex micelle aggregates
which were dissociated upon sonication. Overall
the above findings provide us with a fresh insight for designing ultrasound-responsive polymeric nanoparticles.
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