Kai Yang

Beijing University of Chemical Technology

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Jianping Deng

Beijing University of Chemical Technology

Biao Zhao

Beijing University of Chemical Technology

Pihui Pi

South China University of Technology

Tianbin Ren

Tongji University

Youping Wu

Beijing University of Chemical Technology

Shouping Xu

Harbin Medical University

Xiufang Wen

South China University of Technology

Yanze Liu

Beijing University of Chemical Technology

Xiaojian Wu

Wuhan Institute of Technology

Zhongping Li

Ulsan National Institute of Science and Technology

Cooperative Institutions

Beijing University of Chemical Technology

Chinese Academy of Sciences

South China University of Technology

Kunming University of Science and Technology

Tongji University

China University of Mining and Technology

Beijing Normal University

Sichuan University

Tianjin University

Nanjing Normal University

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Helix‐Sense‐Selective Polymerization of Achiral Monomers for the Preparation of Chiral Helical Polyacetylenes Showing Intense CPL in Solid Film State

Macromolecular Rapid Communications (2022)

Kai Yang Shuo Ma Yingjie Zhang Biao Zhao Jianping Deng

Polymer-based circularly polarized luminescent (CPL) materials have attracted ever-increasing interest. However, to construct CPL materials from achiral monomers is still a big challenge. Here, a series of chiral helical substituted polyacetylenes are prepared by helix-sense-selective polymerization (HSSP) of achiral acetylenic monomers (achiral monomer + fluorescent monomer). HSSPs are accomplished in a bi-solvent mixture consisting of chloroform and chiral α-pinene (chiral component). Chirality transfers from the chiral component to the helical copolymers during polymerization, thereby endowing the copolymers with helical chirality. The resulting copolymers are then fabricated into blend films which exhibit intense optical activity and CPL. The monomer ratio and the physical state of the copolymers have significant impacts on their chiroptical and CPL properties. The maximum luminescence dissymmetry factor of the blend films can be up to 1.3 × 10-2 . The universality of the established strategy for exploring polymer-based CPL materials is demonstrated by using different achiral fluorescent monomers. The present work opens a novel alternative for developing CPL-active polymeric materials starting from achiral monomers.

Chirality

Helix (gastropod)

10.1002/marc.202200111

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Citations (10)

Facile preparation of degradable multi-arm-star-branched waterborne polyurethane with bio-based tannic acid

RSC Advances (2018)

Shun Luo Kai Yang Zhen Zhong Xiaojian Wu Tianbin Ren

A facile method was developed for preparation of degradable multi-arm-star-branched waterborne polyurethanes (MWPUs) by incorporation of bio-based material (tannic acid, TA) in the structure of waterborne polyurethanes.

Tannic acid

Star (game theory)

10.1039/c8ra07875k

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Citations (24)

In situ and controllable synthesis of Ag NPs in tannic acid-based hyperbranched waterborne polyurethanes to prepare antibacterial polyurethanes/Ag NPs composites

RSC Advances (2018)

Shun Luo Lin Fan Kai Yang Zhen Zhong Xiaojian Wu

In this research, a simple and facile method was developed for preparation of antibacterial polyurethanes/Ag NPs composites, where tannic acid-based hyperbranched waterborne polyurethanes (THWPU) was employed as both reductant and stabilizer to in situ and controllably synthesize Ag NPs at mild room temperature. The resultant Ag NPs in THWPU was confirmed by UV spectrophotometer, SEM and EDX. The effects of reaction temperature on the properties of the formed Ag NPs were investigated, and the results showed that the formed Ag NPs under room temperature and 80 °C were both spherical, whereas increasing the reaction temperature benefits for promoting the formation of Ag NPs and narrowing the size distribution of the formed Ag NPs. Furthermore, triangular Ag NPs were in situ synthesized in THWPU via adding strong reductant (NaBH4) during the formation of Ag NPs. Both spherical and triangular Ag NPs enhanced the mechanical property, thermal stability and antibacterial performance of THWPU. More importantly, our results demonstrated that formation of spherical Ag NPs in THWPU were beneficial for improving the mechanical property and thermal stability of THWPU, while the formation of triangular Ag NPs enabled THWPU better antibacterial performance against E. coli and S. aureus. Given these advantages, our obtained Ag NPs nanocomposites could be suitable for a broad range of commercial applications, such as medical products, children's products.

Tannic acid

Thermal Stability

10.1039/c8ra07575a

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Citations (19)

Circularly Polarized Phosphorescence Energy Transfer Combined with Chirality‐Selective Absorption for Modulating Full‐Color and White Circularly Polarized Long Afterglow

Angewandte Chemie (2024)

Kai Yang Run Zhang Yanze Liu Biao Zhao Youping Wu

Abstract Circularly polarized long afterglow (CPLA) attracts great interests in multi‐disciplinary fields with significant potentials in optical multiplexing applications, but achieving full‐color and white CPLA is still challenging. The present contribution reports the first success in utilizing circularly polarized phosphorescence energy transfer (CPP‐ET) combined with chirality‐selective absorption (CSA) to construct full‐color and white CPLA materials. Blue CPLA with luminescence dissymmetry factor ( g lum ) of 3×10 −2 is firstly obtained via the CSA effect of chiral helical polyacetylene and blue ultralong afterglow of inorganic phosphor BP. Significantly, full‐color and white CPLA films are prepared by simply blending different fluorophores into the blue‐CPLA films via CPP‐ET. Benefited from the persistent luminescence of BP, the lifetimes of the fluorophores increase from nanoseconds to minutes, and ultralong full‐color CPLA emissions lasting for more than 20 min are realized with g lum of 10 −3 . Also noticeably, chiral optoelectronic devices, multi‐dimension information encryption and chiral logic gate are developed based on the full‐color tunable CPLA‐active materials. The established strategy provides a universal platform for future development of CPLA‐active materials with great applications.

Chirality

10.1002/ange.202409514

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Citations (0)

Applications of antibiofouling PEG-coating in electrochemical biosensors for determination of glucose in whole blood

Electrochimica Acta (2012)

Chong Sun Jingjing Miao Jie Yan Kai Yang Chun Mao

Glucose oxidase

Protein Adsorption

Biofouling

Glassy carbon

10.1016/j.electacta.2012.11.005

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Citations (49)

Research on the wetting interface characteristics between water molecules and bituminous coal based on pore evolution and molecular dynamic theory

Energy (2024)

Banghao Zhou Qun Zhou Kai Yang Haihui Xin Ran Mei

Bituminous coal

10.1016/j.energy.2024.131169

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Citations (4)

Facile fabrication of an F-POSS polymer-based liquid-repellent Cu mesh with excellent durability and self-cleaning performance

Soft Matter (2019)

Guanzhou Luo Li Wang Xinying Li Kai Yang Yongle Luo

A facile method that combines alkali-assisted oxidation and -SH chelation with a click chemistry reaction was employed to create an F-POSS polymer surface (fluorinated octavinyl polyhedral oligomeric silsesquioxane polymer)-based Cu mesh (F-POSS-OM). The as-prepared F-POSS-OM surface displayed a cohering hierarchical nano-F-POSS polymer granule/micro-Cu(OH)2 wire structure, which provided a re-entrant geometry needed for liquid-repellency and low liquid sliding angles (<15°). Moreover, the easy-prepared structure endows the F-POSS-OM with remarkable durability for mechanical and chemical damages, including wear abrasion, tape-peeling, 100 cm-height hammer impact, severe hand twisting, strong acid/base/salt solutions, and high temperatures. Importantly, F-POSS-OM still retained excellent self-cleaning performance even after being subjected to these damages.

Silsesquioxane

Abrasion (mechanical)

10.1039/c9sm01748h

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Citations (8)

Robust superhydrophobic mesh with excellent chemical resistance for separation of complicated boiling water/oil mixtures

Materials Research Express (2019)

Xinjuan Zeng Kangquan Yang Kai Yang Shouping Xu Mengyi Xu

Nowadays, inferior mechanical stability and poor resistance to chemical corrosion and hot water severely restricted the broad applications of superhydrophobic materials. In this work, a robust superhydrophobic mesh was prepared by using the cured thermoset phenolic resin (TPR) to anchor the hydrophobic SiO2 nanoparticles on stainless-steel mesh surface (SiO2@TPR-SSM). The obtained superhydrophobic SiO2@TPR-SSM exhibits excellent resistance to various mechanical, chemical and high temperature damages. Violent hand kneading or 70 cycles of abrasion by sandpaper could not make the superhydrophobicity of SiO2@TPR-SSM lose. And it would not cause effect on its wettability with immersion in various organic solvents, or strong acid and high-concentration salt solution for 192 h. Even in boiling water or in the environment of 0 °C to 240 °C, the SiO2@TPR-SSM still could retain its superhydrophobicity. Moreover, the obtained superhydrophobic SiO2@TPR-SSM shows high separation capability in separating various water/oil mixtures and the separation cycles are larger than 200. And it also demonstrates high separation capability for boiling strong acid, base and high-concentration salt water/oil mixtures, which makes the SiO2@TPR-SSM into a promising material in industrial separation practice under harsh conditions.

Sandpaper

Chemical resistance

Abrasion (mechanical)

10.1088/2053-1591/ab0cda

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Citations (6)

Bright, low debris, ultrashort hard x-ray table top source using carbon nanotubes

Physics of Plasmas (2011)

S. Bagchi P. Prem Kiran Kai Yang Apparao M. Rao M. K. Bhuyan

We demonstrate that carbon nanotube coated surfaces produce two orders of magnitude brighter hard x-ray emission, in laser produced plasmas, than planar surfaces. It is accompanied by three orders of magnitude reduction in ion debris which is also low Z and nontoxic. The increased emission is a direct consequence of the enhancement in local fields and is via the simple and well known "lightning rod" effect. We propose that this carbon nanotube hard x-ray source is a simple, inexpensive, and high repetition rate hard x-ray point source for a variety of applications in imaging, lithography, microscopy, and material processing.

Point source

Carbon fibers

10.1063/1.3531685

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Citations (37)

Robust and durable fluorinated 8-MAPOSS-based superamphiphobic fabrics with buoyancy boost and drag reduction

Chemical Engineering Journal (2019)

Guanzhou Luo L. Wen Kai Yang Xinying Li Shouping Xu

Silsesquioxane

Biofouling

10.1016/j.cej.2019.123125

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Citations (71)