Article
Polymer Science
Wangmeng Hou, Zheqi Li, Lu Xu, Yuanchao Li, Yi Shi, Yongming Chen
Summary: The study successfully synthesized well-defined Janus molecular bottlebrushes with high yield using a reversible polymerization technique and a PISA-assisted grafting-from strategy. The approach effectively suppressed radical coupling reactions and achieved the preparation of molecular bottlebrushes at high monomer conversion rates.
Article
Polymer Science
Aaron Priester, Jimmy Yeng, Yuwei Zhang, Risheng Wang, Anthony J. Convertine
Summary: Polymer-Induced Self Assembly (PISA) is a technique that utilizes a macro chain transfer agent (macro-CTA) to induce phase separation during block copolymer formation, resulting in the in situ generation of nanostructures. This study focuses on developing a PISA resin for 3D printing using a difunctional macro-CTA, with the aim of maintaining the shape of printed parts without the need for a crosslinker through physical crosslinks between difunctional macro-CTAs.
Article
Polymer Science
Anna Grobelny, Karolina Lorenc, Lucja Skowron, Szczepan Zapotoczny
Summary: This study presents a new method for synthesizing ladder-like donor-acceptor polymer brushes, achieving proper arrangement of pendant donor and acceptor groups through alternating copolymerization. Dense brushes can be obtained in a single polymerization process without the use of toxic metal catalysts or bulky substituents.
Article
Polymer Science
Simeng Liu, Guoqiang Han, Mengmeng Zhang, Bijin Xiong, Jiangping Xu, Jintao Zhu
Summary: Grafting polymer ligands onto gold nanoparticles through gold-sulfur bonds is a common and easy way to produce gold-polymer hybrid nanoparticles. The bonding effects of sulfur-containing end groups on gold nanoparticles were investigated, and it was found that weak bonding between thiolactone-terminated polymers and gold nanoparticles resulted in unstable conjugates. By optimizing the assembly parameters, a superlattice film of gold-polymer conjugates could be constructed.
Article
Polymer Science
Jungyeon Kim, Beatrice Cattoz, Alice H. M. Leung, James D. Parish, C. Remzi Becer
Summary: The synthesis of a new 2-oxazoline monomer and its application in RAFT polymerization are reported in this study. Brush copolymers with different architectures were prepared by adjusting the monomer ratios.
Article
Polymer Science
Zhiying Li, Qianjin Lian, Youwei Xu, Yichuan Zhang, Pengfei Zhang, Jin Geng
Summary: This study investigates the application of a robust aggregation-induced emission luminogen photocatalyst in PET-RAFT polymerization. Well-defined polymers with narrow polydispersities were successfully prepared using this photocatalyst under visible light, and the polymerization process was demonstrated in aqueous environments. Furthermore, the fluorescence intensity linearly increased with the degree of polymerization.
Article
Chemistry, Multidisciplinary
Xingyu Heng, Ruyan Feng, Lijuan Zhu, Liyin Yu, Gaojian Chen, Hong Chen
Summary: Transforming immature DCs into a mature state is crucial for initiating cellular immunity. However, the clinical application of lipopolysaccharides (LPS), which can promote DC maturation, is limited due to biological toxicity. In this study, a novel strategy to synthesize LPS analogues with adjustable structural units was proposed. These analogues, synthesized using monomer units similar to the key functional groups of LPS, showed a greater promoting effect on DC maturation compared to LPS. Additionally, the analogues can be applied to different scenarios due to their varying degrees of DC maturation promotion. This strategy provides a new direction for synthesizing LPS analogues and has the potential for large-scale production with tunable effects on DC maturation.
CHINESE CHEMICAL LETTERS
(2022)
Article
Polymer Science
Dongdong Liu, Shuaiqi Yang, Shaojie Peng, Ying Chen, Li Zhang, Jianbo Tan
Summary: This study reports the first simultaneous synthesis and self-assembly of bottlebrush block copolymers at room temperature using photoinitiated polymerization-induced self-assembly (photo-PISA) with multifunctional macromolecular chain transfer agents (macro-CTAs). The bottlebrush block copolymers promote the formation of higher-order morphologies and exhibit a higher polymerization rate compared to linear block copolymers. The obtained bottlebrush block copolymer vesicles are used as seeds for further chain extension and formation of multicompartment nanoparticles with a sponge internal structure. This study expands polymer architectures employed in PISA and provides a new strategy for synthesizing polymer nanoparticles with unique structures.
MACROMOLECULAR RAPID COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Tianyuan Pan, Sarit Dutta, Yash Kamble, Bijal B. Patel, Matthew A. Wade, Simon A. Rogers, Ying Diao, Damien Guironnet, Charles E. Sing
Summary: Highly branched bottlebrush polymers, with unique properties and versatile applications, have emerged as a promising class of macromolecules. The integration of synthesis, characterization, processing, and modeling in materials design has provided insights for molecular engineering of these materials. Future development is expected to showcase novel material properties in different states.
CHEMISTRY OF MATERIALS
(2022)
Article
Chemistry, Applied
Junhao Wang, Yichuan Zhu, Shixin Zhou, Weichun Wu, Qin Tong, Jianghong Hu, Shenxi Min, Guangliang Hou, Bin Dong, Bo Song
Summary: This study reported a nano-fluorophore prepared through PISA method, with uniform size, excellent dispersion, and enhanced fluorescence emission in aqueous solution. The nano-fluorophores, covered with hydrophilic polyethylene glycol, showed excellent biocompatibility and were successfully applied in fluorescent imaging of HeLa cells. This work provides a novel approach for incorporating fluorescent dyes into polymeric nanoparticles with narrow size distribution, tunable solubility, and biocompatibility.
Article
Polymer Science
Wencheng Shi, Boyu Wu, Xiaofeng Guo, Anchao Feng, San H. Thang
Summary: Fluorescent end-functional mikto-arm star copolymers were synthesized using a novel method and the linear correlation between fluorescence intensity and polymer concentration was verified. This method enables the quantitative analysis of the arm components of star polymers, providing a new approach for the characterization of star polymers.
Article
Polymer Science
Mengjie Zhang, Jiasheng Wu, Zheqi Li, Wangmeng Hou, Yuanchao Li, Yi Shi, Yongming Chen
Summary: In this study, bottlebrush-shaped segmented hyperbranched polymers (B-SHBPs) with high grafting density were successfully synthesized, and their single molecular morphology was directly observed using atomic force microscopy (AFM). The results indicated that the reactivity of the polymerizable group in the inimers significantly affects the molecular morphology of the resulting SHBPs.
Article
Polymer Science
Rishad J. Dalal, Ramya Kumar, Monica Ohnsorg, Mary Brown, Theresa M. Reineke
Summary: Cationic polymer vehicles, especially in the form of bottlebrush polymers, have shown to be promising platforms for nucleic acid delivery due to their increased efficacy in functional pDNA delivery and expression compared to linear polymers. Increasing the molecular weight of polymer leads to higher efficiency in pDNA delivery. The research demonstrates that bottlebrushes are more efficient in shuttling pDNA into and around the nucleus, highlighting the potential for bottlebrushes as effective biomacromolecule delivery vehicles.
Article
Polymer Science
Marija Kavaliauskaite, Medeina Steponaviciute, Justina Kievisaite, Arturas Katelnikovas, Vaidas Klimkevicius
Summary: The synthesis and study of well-defined thermoresponsive amphiphilic copolymers with various compositions have been reported. The kinetics of the reversible addition-fragmentation chain transfer (RAFT) (co)polymerization and the thermoresponsive properties of the copolymers in aqueous solutions were investigated.
Article
Chemistry, Multidisciplinary
Pieter-Jan Voorter, Gayathri Dev, Axel-Laurenz Buckinx, Jinhuo Dai, Priya Subramanian, Anil Kumar, Neil R. Cameron, Tanja Junkers
Summary: This study presents a one-pass continuous flow strategy to directly form block copolymer nanoaggregates from monomers. A significant improvement in continuous flow dialysis, achieved by developing an inline dialysis purification system, enables the fully continuous operation and high throughput operation. The developed system is at least 4-5 times faster than conventional dialysis and reduces the required amount of solvent by almost an order of magnitude compared to conventional methods.
Article
Nanoscience & Nanotechnology
Jiajun Yan, Sipei Li, Francis Cartieri, Zongyu Wang, T. Kevin Hitchens, Jody Leonardo, Saadyah E. Averick, Krzysztof Matyjaszewski
ACS APPLIED MATERIALS & INTERFACES
(2018)
Article
Biochemistry & Molecular Biology
Sipei Li, Maiko Omi, Francis Cartieri, Dominik Konkolewicz, Gordon Mao, Haifeng Gao, Saadyah E. Averick, Yuji Mishina, Krzysztof Matyjaszewski
Article
Polymer Science
Zongyu Wang, Jiajun Yan, Tong Liu, Qangbing Wei, Sipei Li, Mateusz Olszewski, Jianing Wu, Julian Sobieski, Marco Fantin, Michael R. Bockstaller, Krzysztof Matyjaszewski
Article
Polymer Science
Zongyu Wang, Marco Fantin, Julian Sobieski, Zhenhua Wang, Jiajun Yan, Jaejun Lee, Tong Liu, Sipei Li, Mateusz Olszewski, Michael R. Bockstaller, Krzysztof Matyjaszewski
Article
Polymer Science
Zongyu Wang, Tong Liu, Yuqi Zhao, Jaejun Lee, Qiangbing Wei, Jiajun Yan, Sipei Li, Mateusz Olszewski, Rongguan Yin, Yue Zhai, Michael R. Bockstaller, Krzysztof Matyjaszewski
Article
Polymer Science
Zongyu Wang, Jaejun Lee, Zhenhua Wang, Yuqi Zhao, Jiajun Yan, Yu Lin, Sipei Li, Tong Liu, Mateusz Olszewski, Joanna Pietrasik, Michael R. Bockstaller, Krzysztof Matyjaszewski
Article
Chemistry, Physical
Sipei Li, Tong Liu, Jiajun Yan, Jacob Flum, Han Wang, Francesca Lorandi, Zongyu Wang, Liye Fu, Leiming Hu, Yuqi Zhao, Rui Yuan, Mingkang Sun, Jay F. Whitacre, Krzysztof Matyjaszewski
Article
Engineering, Environmental
Yilin Zhang, Liye Fu, Sipei Li, Jiajun Yan, Mingkang Sun, Juan Pablo Giraldo, Krzysztof Matyjaszewski, Robert D. Tilton, Gregory Lowry
Summary: The size, negative charge content, and hydrophobicity of nano-carriers affect their uptake and translocation in plants, with smaller carriers favoring transport to younger leaves and larger carriers favoring transport to roots.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2021)
Review
Polymer Science
Sipei Li, Yang Liu, Dana A. Wong, John Yang
Summary: Since the second industrial revolution, the use of fossil fuels has been driving the advancement of human society, but also leading to a surge in carbon dioxide emissions, causing issues like global warming. Membrane separation technologies have emerged as a major carbon reduction method, with mixed matrix membranes (MMMs) gaining attention for their potential to combine different materials' advantages and enhance separation efficiency.
Article
Chemistry, Physical
Tong Liu, Xinsheng Wu, Shang Zhu, Francesca Lorandi, Longchang Ni, Sipei Li, Mingkang Sun, Brian P. Bloom, David H. Waldeck, Venkatasubramanian Viswanathan, Jay F. Whitacre, Krzysztof Matyjaszewski
Summary: In this study, we successfully address the challenges of dendrites and dead lithium formation in metallic Li anodes by employing polymer-stabilized liquid electrodeposition. Stable nanoparticles are formed by grafting block copolymers onto the surface of EGaIn. These nanoparticles with lithiophilic and interactive properties are fabricated on copper current collectors using a scalable spray coating approach. DFT computations reveal the binding properties between the nanoparticles layer and Li. The results show that the modified copper current collectors have lower Li nucleation overpotential and exhibit stable cycling performance.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Gavin R. Kiel, David J. Lundberg, Elisabeth Prince, Keith E. L. Husted, Alayna M. Johnson, Valerie Lensch, Sipei Li, Peyton Shieh, Jeremiah A. Johnson
Summary: This study reports the use of cleavable comonomer additives for the chemical deconstruction and recycling of vinyl polymers. The addition of these additives allows for selective depolymerization of polystyrene, resulting in fragmented molecules suitable for repolymerization, thus enabling the recycling of vinyl polymers.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Chemistry, Multidisciplinary
Zhikang Liu, Yanhao Dong, Xiaoqun Qi, Ru Wang, Zhenglu Zhu, Chao Yan, Xinpeng Jiao, Sipei Li, Long Qie, Ju Li, Yunhui Huang
Summary: This article introduces a method to mitigate short-circuiting caused by mechanical abuse in high-energy-density batteries by designing a structure of highly deformable separator/current collector composite. The researchers replaced the traditional aluminum foil with metalized plastic material as the current collector, which not only increased the energy density of the battery but also greatly improved its safety.
ENERGY & ENVIRONMENTAL SCIENCE
(2022)
Article
Nanoscience & Nanotechnology
Rui Yuan, Han Wang, Mingkang Sun, Krishnan Damodaran, Eric Gottlieb, Maciej Kopec, Karoline Eckhart, Sipei Li, Jay Whitacre, Krzysztof Matyjaszewski, Tomasz Kowalewski
ACS APPLIED NANO MATERIALS
(2019)
Article
Chemistry, Physical
Sipei Li, Han Wang, Wei Wu, Francesca Lorandi, Jay F. Whitacre, Krzysztof Matyjaszewski
ACS APPLIED ENERGY MATERIALS
(2019)
Article
Biochemistry & Molecular Biology
Sipei Li, Hee Sung Chung, Antonina Simakova, Zongyu Wang, Sangwoo Park, Liye Fu, Devora Cohen-Karni, Saadyah Averick, Krzysztof Matyjaszewski
Article
Polymer Science
Paige A. Shaw, Maxime Klausen, Mark Bradley
Summary: A light-responsive polymer capable of controlled release of camptothecin and generation of reactive oxygen species (ROS) was developed, which exhibited high cancer cell killing activity through both camptothecin release and ROS generation.
Article
Polymer Science
Donghui Zhang, Shiqi Liu, Zhihao Cai, Weizhe Luo, Guojian Liu, Runhui Liu
Summary: A straightforward and efficient method for synthesizing NPC monomers has been developed in this study, which enhances the availability of NPC monomers and facilitates the synthesis of polypeptides.
