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Preparation and Characterization of High Content Paraffin Wax Microcapsules and Micro/Nanocapsules with Poly Methyl Methacrylate Shell by Suspension-Like Polymerization

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Chinese Journal of Chemistry 2017年第4期35卷 497-506页

作者： Jiaojiao Zhang Tianbo Zhao yuqiao chai Lili Wang Key Laboratory of Cluster Science of Ministry of Education Beijing Institute of Technology Beo'ing 100081 China

The suspension-like polymerization method is used to obtain poly methyl methacrylate （PMMA）/paraffin wax microcapsules and micro/nanocapsules with high core content. Particle size distribution （PSD） analysis indicates that the average particle size of microcapsules is 94 μm, and the size of micro/nanocapsules ranges in 0.1-19 μm. Differential scanning calorimetry （DSC） and thermalgravimetric analysis （TGA） results show that the fabricated paraffin contents in microcapsules and micro/nanocapsules are as high as 89.5 wt% and 80~2 wt%, respectively with good thermal stability. Thermal cycling tests justify that both the microcapsules and micro/nanocapsules have good thermal reliability with respect to the changes in their thermal properties after 1000 thermal cycling. This work pro- vides a novel method to prepare microcapsules and micro/nanocapsules with high core content which may benefit further study on thermal energy storage.

关键词： microcapsules micro/nanocapsules suspension-like polymerization poly methyl methacrylate paraffin wax

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Tunable metallic-like transport in polypyrrole

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Materials Futures 2022年第1期1卷 3-8页

作者： Xiaoling Zang Yuqian Jiang yuqiao chai Fengwang Li Junhui Ji Mianqi Xue Technical Institute of Physics and Chemistry Chinese Academy of SciencesBeijingPeople’s Republic of China Laboratory for Nanosystem and Hierarchy Fabrication National Center for Nanoscience and TechnologyBeijingPeople’s Republic of China School of Chemical and Biomolecular Engineering and The University of Sydney Nano Institute The University of SydneySydneyNew South WalesAustralia College of Chemistry and Materials Engineering Beijing Technology and Business UniversityBeijingPeople’s Republic of China Beijing National Laboratory for Molecular Sciences BeijingPeople’s Republic of China

Conjugated polymers(CPs),organic macromolecules with a linear backbone of alternating C–C and C=C bonds,possess unique semiconductive properties,providing new opportunities for organic electronics,photonics,information,and energy *** the metallic or metallic-like,even superconducting properties beyond semiconductivity in CPs is always one of the ultimate goals in polymer science and condensed *** two metallic and semi-metallic transport cases—aniline-derived polyaniline and thiophene-derived poly(3,4-ethylenedioxythiophene)—have been reported since the development of CPs for four *** synthesis is a key challenge in discovering more *** we report the metallic-like transport behavior of another CP,polypyrrole(PPy).We observe that the transport behavior of PPy changes from semiconductor to insulator-metal transition,and gradually realizes metallic-like performance when the crystalline degree *** a generalized Einstein relation model,we rationalized the mechanism behind the *** metallic-like transport in PPy demonstrates electron strong correlation and phonon–electron interaction in soft condensation matter,and may find practical applications of CPs in electrics and spintronics.

关键词： conjugated polymers metallic-like polypyrrole transport behavior

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Electrical anisotropy in two-dimensional reduced graphene oxide/polypyrrole-based ordered conjugated system ensure multi-stimulus response signal adapter

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Science China Materials 2024年第12期67卷 3966-3975页

作者： yuqiao chai Ruoqi Chen Xinlei Ma Yonglin He Huanrong Zhang Tianlai Xia Jitao Chen Yushu Wang Hui Ma Xusheng Wang Wei Rao Xinyue Zhang Yapei Wang Junhui Ji Fengwang Li Mianqi Xue Technical Institute of Physics and Chemistry Chinese Academy of SciencesBeijing 100190China College of Material Science and Chemical Engineering Ningbo University of TechnologyNingbo 315211China Department of Chemistry Renmin University of ChinaBeijing 100872China College of Chemistry and Molecular Engineering Peking UniversityBeijing 100871China Qingdao Innovation and Development Center Harbin Engineering UniversityQingdao 266400China School of Chemical and Biomolecular Engineering The University of SydneyNew South Wales 2006Australia

Electronic technology,based on signal conversion induced by voltage stimulation,forms the core foundation of the state-of-the-art intelligent devices,tools,and *** conversions are inherently binary and limited because they rely solely on voltage,which presents challenges for many emerging frontier ***,a two-dimensional ordered conjugated system of reduced graphene oxide/polypyrrole(rGO/PPy)has been ***-stimulus response signal adapters have been constructed,utilizing the electrical anisotropy inherent in the rGO/PPy *** electrical anisotropy,derived from the quasi-two-dimensional geometry of rGO/PPy,enables the device to produce distinct electrical signals in response to various *** effective responses to light and pressure,the two most common input stimuli other than voltage,it can output quaternary/denary signals and visual optical signals,as well as enables information encryption using passive ***,the signal adapter demonstrates high cyclic stability under repeated pressure and/or light *** successful development of this low-cost,scalable signal adapter paves the way for the next-generation of intelligent systems,promising advancements in human-computer interaction,electronic skin,biological implant equipment,and related fields.

关键词： electrical anisotropy signal adapters polypyrrole graphene two-dimensional conjugated system

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秩次分析法评价甜荞品种产量性能及稳定性

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干旱地区农业研究 2008年第4期26卷 185-189页

作者：高金锋高小丽韩海邱军柴岩冯佰利西北农林科技大学农学院陕西杨凌712100 新疆建设兵团农四师七0团新疆伊宁835116 全国农技推广服务中心北京100026

对参加国家甜荞品种区域试验的6个甜荞品种(品系)37个试验环境点的数据资料,应用非参数统计方法——秩次分析法对产量进行综合分析和评价。结果表明,参试品种间产量性能及稳定性存在显著差异,其中8802-1和平荞2号是较高产、稳定性品种;... 详细信息

对参加国家甜荞品种区域试验的6个甜荞品种(品系)37个试验环境点的数据资料,应用非参数统计方法——秩次分析法对产量进行综合分析和评价。结果表明,参试品种间产量性能及稳定性存在显著差异,其中8802-1和平荞2号是较高产、稳定性品种;北早生属于较高产、不稳定性品种;榆荞-4属于中产、具有平均稳定性的品种;固引1号属于中产、不稳定性品种;六荞1号属于低产、稳定性品种。

关键词：甜荞秩次分析法产量性能稳定性

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