(Natural) polymers

(Natural) polymersApplicationCharacteristic dimensionCharacterizationCustomer publicationsMaterialPhase analysisRenewable energySAXSSelf-assembled materialTechnique

Preparation of isoporous membranes from low χ block copolymers via co-assembly with H-bond interacting homopolymers

Zhu, Guo-Dong; Yang, Cao-Ying; Yin, Yu-Rong; Yi, Zhuan; Chen, Xian-Hong; Liu, Li-Fen; Gao, Cong-Jie

Self-assembly and non-solvent induced phase separation (SNIPS) was extensively used in the fabrication of isoporous membranes for its compatibility with massive production. However, for the well-defined SNIPS, preparation of isoporous membranes from low χ block copolymers is challenging because self-assembly of these polymers is usually hard to induce. In this…
(Natural) polymersApplicationCharacterizationCustomer publicationsFractal dimensionMaterialPolymer researchSAXSTechnique

A highly transparent and ultra-stretchable conductor with stable conductivity during large deformation

Lei, Zhouyue; Wu, Peiyi

Intrinsically stretchable conductors have undergone rapid development in the past few years and a variety of strategies have been established to improve their electro-mechanical properties. However, ranging from electronically to ionically conductive materials, they are usually vulnerable either to large deformation or at high/low temperatures, mainly due to the fact…
(Natural) polymersApplicationCharacteristic dimensionCharacterizationCustomer publicationsMaterialPhase analysisPolymer researchTechniqueWAXS

Diversified α-phase nanostructure of isotactic polypropylene under cylindrical confinement via cross diffraction analysis

Zeng, Xingming; Zhang, Shuailin; Zheng, Nan; Yu, Shichen; Li, Xiaoguang; Ageishi, Masaki; Lotz, Bernard; Liu, Gengxin; Cao, Yan

Understanding polymer nanostructures is a prerequisite to manipulate their physical properties. Molecular self-assembly under confinement effectively generates novel polymer nanostructures. However, in one confined system, diffraction signals of different nanostructures are merged in a typical two-dimensional (2D) wide-angle X-ray diffraction (WAXD) measurement. For comparison, selected-area…
(Natural) polymersApplicationCharacterizationCustomer publicationsFractal dimensionGISAXSGIWAXSMaterialOrientation analysisRenewable energySurface structure and patternsTechniqueThin films

Simply planarizing nonfused perylene diimide based acceptors toward promising non-fullerene solar cells

Bian, Gao-Feng; Zhao, Feng; Lau, Tsz-Ki; Sheng, Chun-Qi; Lu, Xinhui; Du, Hui; Zhang, Cheng; Qu, Zhi-Rong; Chen, Hongzheng; Wan, Jun-Hua

This work focuses on developing high-efficiency perylene diimide (PDI)-based small molecular nonfullerene acceptors with a simple synthetic strategy. We reported a new electron acceptor, Py-e-PDI, obtained via cross-coupling four PDI units with a planar pyrene core through ethynyl groups. Although the ring-fusion synthetic procedure was omitted, the large planar core…
(Natural) polymersApplicationCharacterizationCompositesCustomer publicationsMaterialOrientation analysisPolymer researchSAXSTechnique

High-performance polyurethane nanocomposites based on UPy-modified cellulose nanocrystals

Tian, Donglin; Wang, Fenfen; Yang, Zhijun; Niu, Xiling; Wu, Qiang; Sun, Pingchuan

Densely H-bonding assemblies are the key strategy found by nature to enhance the rupture strength of natural polymers without sacrificing their toughness, such as spider silk, while it still remains a great challenge using such intriguing strategy to prepare high-performance synthesized polymer or biopolymer enhanced polymer nanocomposites. To address this…
(Natural) polymersApplicationCharacterizationCustomer publicationsFractal dimensionGISAXSGIWAXSMaterialOrientation analysisRenewable energySurface structure and patternsTechniqueThin films

Single-Junction Organic Solar Cell with over 15% Efficiency Using Fused-Ring Acceptor with Electron-Deficient Core

Yuan, Jun; Zhang, Yunqiang; Zhou, Liuyang; Zhang, Guichuan; Yip, Hin-Lap; Lau, Tsz-Ki; Lu, Xinhui; Zhu, Can; Peng, Hongjian; Johnson, Paul A.; Leclerc, Mario; Cao, Yong; Ulanski, Jacek; Li, Yongfang; Zou, Yingping

Summary Recently, non-fullerene n-type organic semiconductors have attracted significant attention as acceptors in organic photovoltaics (OPVs) due to their great potential to realize high-power conversion efficiencies. The rational design of the central fused ring unit of these acceptor molecules is crucial to maximize device performance. Here, we report a new…
(Natural) polymersApplicationCharacterizationCustomer publicationsFractal dimensionGISAXSGIWAXSMaterialOrientation analysisRenewable energySurface structure and patternsTechniqueThin films

Charge carrier transport and nanomorphology control for efficient non-fullerene organic solar cells

Hu, Hanlin; Deng, Wanyuan; Qin, Minchao; Yin, Hang; Lau, Tsz-Ki; Fong, Patrick W. K.; Ren, Zhiwei; Liang, Qiong; Cui, Li; Wu, Hongbin; Lu, Xinhui; Zhang, Weimin; McCulloch, Iain; Li, Gang

Single junction organic photovoltaic devices (OPVs) have exceeded 15% power conversion efficiency (PCE) with the help of fused ring based low-bandgap non-fullerene acceptors (NFAs). As a major type of NFA, the indacenodithiophene derivative NFA (IDTBR) has been shown to have superior OPV stability with outstanding VOC, but the efficiency is…
(Natural) polymersApplicationCharacterizationCustomer publicationsGIWAXSMaterialOrientation analysisRenewable energySurface structure and patternsTechniqueThin films

Fused thienobenzene-thienothiophene electron acceptors for organic solar cells

Xu, Ye; Jiang, Haotian; Lau, Tsz-Ki; Zhu, Jingshuai; Wang, Jiayu; Lu, Xinhui; Zhan, Xiaowei; Lin, Yuze

Small molecule ladder-type heteroarenes IHBT-2F is designed and synthesized with strong electron-donating and molecular packing properties, where the central unit, fused thienobenzene-thienothiphene (IHBT), is attached with the strong electron-deficient 2-(5,6-difluoro-3-oxo-2,3-dihydro-1H-inden-1-ylidene)malononitrile (2FIC) as the end group. The counterpart IDBT-2F with…
(Natural) polymersApplicationCharacterizationCrystalline fractionCustomer publicationsMaterialOrientation analysisPhase analysisPolymer researchSAXSTechnique

Structure and self-reinforcing mechanism of biaxially oriented polyethylene pipes produced by solid phase die drawing

Kong, Chen; Wang, Yujie; Ye, Lin; Zhao, Xiaowen

Biaxially oriented polyethylene (PE) pipes were prepared through solid phase die drawing technology. Drawing speed presented a prominent effect on the hoop draw ratio (DRhoop) and axial draw ratio (DRaxial) of the pipes. For pipe with DRhoop/DRaxial of 2.465/1.182, the tensile strength was improved significantly along hoop direction as well…