Article
Chemistry, Multidisciplinary
Guillermo Moreno-Alcantar, Alessandro Aliprandi, Remi Rouquette, Luca Pesce, Klaus Wurst, Claudio Perego, Peter Bruggeller, Giovanni M. Pavan, Luisa De Cola
Summary: Self-assembly relies on the ability of smaller entities to arrange into organized systems, with the design of the media playing a crucial role. The media determines the self-assembly pathway and can control the wrapping process of supramolecular homo-aggregates by a different crystal lattice component. This reverse coating process is controlled by the media composition and could lead to the construction of hierarchical supramolecular structures.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Review
Chemistry, Physical
Ian W. Hamley
Summary: Lamellar structures are common in soft materials and exhibit characteristic scattering patterns. Diffuse scattering can provide information about the fluctuations and elastic properties of lamellae, as well as insights into the nature of correlated structures.
Article
Polymer Science
Pengyu Chen, Frank S. Bates, Kevin D. Dorfman
Summary: In this study, the feasibility of adding ABC triblock copolymers into a polymer system was investigated using self-consistent field theory. The results showed that the addition of a small amount of ISO could stabilize the GA morphology, but the phase window was relatively narrow. Designing the system to have comparable domain sizes enhanced the stability of GA against competing lamellae.
Article
Materials Science, Composites
Zongqian Yuan, Aishun Ding, Binbin Xu, Xiaoyu Huang, Guolin Lu, Hao Guo
Summary: This study presents a new method for producing reactive composite nanofibers through polymerization-induced self-assembly (PISA). The method allows for the preparation of one-dimensional composite nanofibers with controlled molecular weights and narrow dispersities.
COMPOSITES COMMUNICATIONS
(2022)
Article
Polymer Science
Guangwei Hu, Shaohui Lin, Boxin Zhao, Flora Ng, Qinmin Pan
Summary: Diblock copolymers containing PNB and PS were synthesized using ROMP and NMRP approaches. The desired diblock copolymers with ideal properties were successfully obtained by manipulating the reaction conditions. These copolymers have broad application prospects in polymer electrolytes, nanoporous membranes, and other fields.
EUROPEAN POLYMER JOURNAL
(2022)
Article
Polymer Science
Hirofumi Harada, Takeshi Saito, Masatoshi Tokita
Summary: The thermal conductivity of polymers can be effectively enhanced by liquid crystallinity, which exhibits anisotropic thermal conductivity with a greater magnitude in the orientation direction. This study investigated the correlation between liquid crystal structures and thermal diffusivity, and found that smectic layers can enhance thermal diffusivity in their normal direction.
Article
Chemistry, Multidisciplinary
Kevin Ho, Kris S. Kim, Sissi de Beer, Gilbert C. Walker
Summary: Investigations on the transitional composition between two thin-film morphologies of the block copolymer, polystyrene-block-poly(tert-butyl acrylate) (PS-b-PtBuA), were conducted using near-field infrared spectroscopy and atomic force microscopy mechanical measurements. The techniques allowed for block identification with nanoscale spatial resolution and elucidated the material's sub-surface composition, revealing distinct patterns of PS and PtBuA formation in different regions of the polymer film.
Article
Chemistry, Physical
Kyunghyeon Lee, Joon Young Kim, Kyungtae Kim, Jonghyuk Jeon, Heejung Kang, Byeong-Hyeok Sohn
Summary: Patchy micelles of diblock copolymers can be polymerized into a linear supracolloidal chain, which is semi-flexible and can be suitably explained by the worm-like chain model. Utilizing the semi-flexible nature of the chains, a self-supporting film of supracolloidal chains with nanoscale pores can be produced by a spin-coating technique.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Polymer Science
A. Chervanyov
Summary: The study explores the influence of temperature-induced morphological changes in insulating diblock copolymer systems filled with conductive fillers on the conductivity of the composite. By utilizing phase-field modeling, Monte-Carlo simulations, and resistor network modeling, a quantitative relationship between the morphology of the filled diblock copolymer and its conductivity is established. It is demonstrated that transitions between different microphases in the diblock copolymer system lead to transitions in the conductive filler network structure and affect the composite conductivity significantly.
JOURNAL OF POLYMER SCIENCE
(2022)
Article
Chemistry, Physical
Tzu-Ling Ma, Wei-Ting Du, Shiao-Wei Kuo
Summary: This study describes the preparation of hydrogen bonding connected micelles, consisting of a poly(styrene-alt-(para-hydroxyphenylmaleimide)) [poly(S-alt-pHPMI)] core and a poly(4-vinylpyridine) (P4VP) derivative shell in a selective solvent. Different P4VP derivatives were synthesized to modify the hydrogen bonding interaction sites at the core/shell interface. The successful self-assembly of the poly(S-alt-pHPMI)/PS-co-P4VP inter-polymer complexes into spherical structures was confirmed by TEM images.
Article
Nanoscience & Nanotechnology
Juan Zhang, Andrew N. Keith, Sergei S. Sheiko, Xuehui Wang, Zhigang Wang
Summary: In order to mimic the mechanical behaviors of skin, a reprocessable bottlebrush copolymer elastomer was designed with renewable and rigid cellulose as backbones, while poly(n-butyl acrylate)-b-poly(methyl methacrylate) (PBA-b-PMMA) diblocks were designed as grafted side chains. The resulting elastomers underwent a step-cyclic tensile deformation, leading to internal structures becoming oriented nanofibers and exhibiting stress-strain behaviors similar to real skin. Our current research work is expected to be important in the development of a series of biomimetic skinlike polymer materials.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Polymer Science
Wennie Yun Lee, Dana Chapman, Fei Yu, William R. T. Tait, R. Paxton Thedford, Guillaume Freychet, Mikhail Zhernenkov, Lara A. Estroff, Ulrich B. Wiesner
Summary: Self-assembled block copolymer thin films and their nanocomposites have diverse applications due to their nanostructures. Optical super-resolution microscopy (OSRM) has emerged as an alternative method for characterizing nanoscopic polymer morphology. This study focuses on self-assembled triblock terpolymer thin films with all three blocks exposed at the top surface, and demonstrates the use of OSRM for multicolor characterization of chemically distinct nanodomains.
Article
Chemistry, Inorganic & Nuclear
Ziqing Liu, Biao Xiong, Yingxiang Dong, Yin Ning, Dan Li
Summary: The incorporation of metal-organic frameworks (MOFs) into calcite crystals through postsynthetic modification results in superior composite crystals that exhibit excellent performance in fluoride removal. This versatile strategy opens up possibilities for the design and synthesis of hybrid functional materials with controllable compositions.
INORGANIC CHEMISTRY
(2022)
Article
Chemistry, Applied
Chao Lin, Pengju Pan, Guorong Shan, Miao Du
Summary: Poly(ethylene glycol)-b-poly(epsilon-caprolactone) diblock copolymers (PEG-b-PCL) with predesigned hydrophilic/hydrophobic block length ratios were synthesized and self-assembled into micelles for emulsifying medium-chain triglycerides with an aqueous phase. The relationship between the wettability of the copolymer micelles and their emulsification properties was proved, and various Pickering emulsions, including double-W/O/W emulsions, were controllably prepared through one-step homogenization. The double microstructure of W/O/W Pickering emulsion was demonstrated to be highly stable during long-term storage.
Article
Polymer Science
Huiying Wang, Qiang Chen, Zhen Geng, Jingyi Rao, Bijin Xiong, Frederic Lortie, Julien Bernard, Wolfgang H. Binder, Senbin Chen, Jintao Zhu
Summary: By introducing 2,6-diaminopyridine moieties and H-bonding amphiphilic interactions, a simple and effective self-assembly strategy was designed to form giant vesicles with a diameter of approximately 3 μm, providing a new opportunity for the design of supramolecular polymers.