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CURING BEHAVIOR OF poLYBENZOXAINE/VERMICULITE NANOCOMpoSITES

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CURING BEHAVIOR OF POLYBENZOXAINE/VERMICULITE NANOCOMPOSITES

STRUCTURE-PROPERTY RELATIONSHIP OF poLyiMIDES WITH BIPHENYL UNITS: A MOLECULAR SIMULATION APPROACH

Third East Asian polymer Conference

作者： Zhaoyang Ye, yi gu state key laboratory of polymer materials college of polymer science and engineering, sichuan university, chengdu, 610065

Introductionpolybenzoxazine (also called phenolic resin of ring-opening polymerization) is a newly developed thermoset resin with unique properties. Recent years, the investigation of polybenzoxazine/layered silicate intercalated nanocomposites has been developed. T. Takeichi and H. Ishida explored that the acidic onium potons on the organophilic montmorillonite surface catalyzed the oxazine ring-opening polymerization of polybenzoxazine precursor, and the dispersed status (intercalation and/or exfoliation) of montmorillonite layers was decided by chain length of surfactant of ammonium salt. As content of the organophilic montmorillonite increased, montmorillonite layers kept in intercalated status in polymer matrix regardless of ammonium *** is another kind of layered silicate with unique dilatability in which the basal spacing of its

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STRUCTURE-PROPERTY RELATIONSHIP OF POLYIMIDES WITH BIPHENYL ...

苯并噁嗪树脂插层蛭石纳米复合材料的制备与表征

Third East Asian polymer Conference

作者： Pan Rui, Liu Xikui, and gu yi state key laboratory of polymeric materials engineering, college of polymer science and engineering, sichuan university, chengdu, P. R. china

polyimides are a class of high performance polymers that are widely used as high temperature insulators, coatings, adhesives and advanced composite matrices. However, their properties strongly depend on their chemical structures. Especially, side chains modification and functionalization of high performance polyimides have been taken more and more attentions in the past decades. The development of structure-property relationships for polyimides with different side chains may provide a guideline for designing polyimides having desirable end-use *** this study, the properties of polyimides with different side chains are calculated using molecular modeling techniques, and the results are compared with experimental data. An attempt is made to establish structure-property

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四川大学学报（工程科学版） 2002年第4期34卷 71-75页

作者：叶朝阳顾宜四川大学高分子科学与工程学院高分子材料工程国家重点实验室四川成都610065

分析了蛭石精矿和膨胀蛭石的组成和结构 ,用十六烷基三甲基溴化铵 (CTAB)进行了有机化处理 ,再通过熔融或溶液混合插层苯并口恶嗪树脂制备了苯并口恶嗪树脂插层蛭石纳米复合材料 ,并采用蒙脱土进行了对照实验。结果表明 :蛭石精矿... 详细信息

分析了蛭石精矿和膨胀蛭石的组成和结构 ,用十六烷基三甲基溴化铵 (CTAB)进行了有机化处理 ,再通过熔融或溶液混合插层苯并口恶嗪树脂制备了苯并口恶嗪树脂插层蛭石纳米复合材料 ,并采用蒙脱土进行了对照实验。结果表明 :蛭石精矿是由蛭石、水金云母及金云母所组成。有机化处理使蛭石晶层的d0 0 1由 1.46nm增加到 2 .6 7nm ,并出现二级衍射峰d0 0 2 =1.34nm。苯并口恶嗪树脂插层后 ,蛭石层间距进一步增大 ,插层效果优于蒙脱土 ,而水金云母层间距没有变化 ;复合物固化后 ,有机化蛭石和水金云母的特征峰都消失了 ,表明形成了苯并口恶嗪

关键词：苯并恶嗪树脂制备表征纳米复合材料蛭石插层复合

苯并噁嗪/环氧树脂/咪唑三元体系的固化动力学及固化工艺研究

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四川大学学报（工程科学版） 2011年第5期43卷 228-233页

作者：张华川冉起超顾宜高分子材料工程国家重点实验室四川大学高分子科学与工程学院四川成都610065

使用二苯甲烷二胺型苯并噁嗪(B)、环氧树脂F-51、咪唑制备了一种三元共混树脂体系(BFM),采用非等温DSC测试方法,基于Kissinger,Ozawa,Friedman,Flynn-Wall-Ozawa等理论模型对BFM的固化动力学进行了分析研究。结果表明,体系中主要存在两... 详细信息

使用二苯甲烷二胺型苯并噁嗪(B)、环氧树脂F-51、咪唑制备了一种三元共混树脂体系(BFM),采用非等温DSC测试方法,基于Kissinger,Ozawa,Friedman,Flynn-Wall-Ozawa等理论模型对BFM的固化动力学进行了分析研究。结果表明,体系中主要存在两种反应,计算得到两者的表观活化能分别为85.05、37.3 kJ/mol,反应级数分别为0.8、1.6。以此得出了相应的动力学方程。此外,基于得到的动力学参数,结合体系固化反应特点,提出了一种预测固化时间的方法,从而确定了固化工艺。

关键词：苯并噁嗪环氧咪唑固化动力学固化工艺

Study on products and reaction paths for synthesis of 3,4-dihydro-2H-3-phenyl-1,3-benzoxazine from phenol,aniline and formaldehyde

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Chinese Chemical Letters 2015年第3期26卷 348-352页

作者： Cheng-Xi Zhang Yu-Yuan Deng yi-yang Zhang po yang yi gu state key laboratory of polymer materials engineering College of Polymer Science and EngineeringSichuan University

To study the synthesis of 3,4-dihydro-2H-3-phenyl-1,3-benzoxazine（benzoxazine）,the reaction paths of phenol,aniline and formaldehyde were investigated by analyzing the synthesis crude *** the aid of high-performance liquid chromatography（HPLC）,chromatographic column and preparative HPLC,seven compounds originated from the crude products were obtained and their chemical structures were *** reaction paths are proposed based on these *** show that Nhydroxymethyl aniline（HMA） derived from the reaction of formaldehyde and aniline is probably the key intermediate during the *** can react with itself or other reactants to form other intermediates,such as 1,3,5-triphenyl-1,3,5-triazinane and 2-（（phenylamino）methyl）phenol,and further form benzoxazine and byproducts.

关键词： aniline phenol formaldehyde itself crude originated react monomer probably claimed

In situ protonation in a locally flexible porous coordination polymer for enhancing proton-carrier loading and proton conductivity

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science china Chemistry 2024年第10期67卷 3432-3437页

作者： Xianzhe Wei Jincheng Liu Yan Su Weitao Wang guixiang Wang Gen Zhang Ping Wang Cheng gu state key laboratory of Luminescent materials and Devices Institute of Polymer Optoelectronic Materials and DevicesSouth China University of TechnologyGuangzhou 510640China college of polymer science and engineering State Key Laboratory of Polymer Materials EngineeringSichuan UniversityChengdu 610065China key laboratory for Soft Chemistry and Functional materials of Ministry of Education School of Chemistry and Chemical EngineeringNanjing University of Science and TechnologyNanjing 210094China

Designing efficient proton-conductive materials is crucial in fuel ***,it remains a substantial challenge because of the issues in proton mobility,proton-carrier amount,and orientation of proton host ***,we report an in-situ protonation strategy to produce a locally flexible porous coordination polymer(PCP)to enhance the proton-carrier loading and proton *** local dipole flipping of the ligand allows effective proton exchange with low activation energy,promoting interpore proton transport through the pore apertures and pore *** protonation induces substantial charges to the frameworks and enhances the interaction with proton carriers,thereby increasing the loading of the proton *** this design strategy,the resulting PCP exhibits enhanced phosphoric acid loading and extraordinary proton conductivities under both aqueous and anhydrous conditions compared to its isoreticular analog that features rigidity without proton-exchange *** work provides a new avenue for designing proton-conductive materials that combine structural dynamics with performance merits.

关键词： porous coordination polymers in-situ protonation local flexibility proton-exchange mechanism proton conduction

Multifunctional photothermal hydrogels: Design principles, various functions, and promising biological applications

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Chinese Chemical Letters 2024年第10期35卷 53-62页

作者： Zikang Hu Hengjie Zhang Zhengqiu Li Tianbao Zhao Zhipeng gu Qijuan Yuan Baoshu Chen School of materials science and engineering Xihua UniversityChengdu 610039China college of polymer science and engineering State Key Laboratory of Polymer Materials EngineeringSichuan UniversityChengdu 610065China

Photothermal hydrogels with excellent photo responsive and thermal conversion ability had attract a great deal of attention from researchers to explore their biological *** review aimed to provide a comprehensive overview of photothermal hydrogels,focusing on their design principles,various functions,and biological ***,several classifications of photothermal hydrogels were given according to different photothermal agents(metal,metal sulfide/oxide,MXene,carbon-based,dyes,black phosphorus,and polymer)utilized in hydrogel *** photothermal conversion mechanism and hydrogel fabrication were also discussed in ***,the relationship between their photothermal conversion property and functions,together with some indispensable property such as biocompatibility,adhesion,mechanical properties,and self-healing properties was fully ***,the ap-plications of photothermal hydrogels in the biomedical(i.e.,wound healing,antibacterial treatments,con-trolled drug release,bone repair,and tumor treatment)was ***,the future opportunities and challenges of photothermal hydrogels were *** believe that this review could provide a new horizon for further preparation of photothermal hydrogels,and could promote their applications in widerfields.

关键词： Photothermal agents Photothermal conversion Multifunctional hydrogels Wound healing Tissue repair

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人造黑色素染发材料

高分子学报 2024年第2期55卷 192-201页

作者：杨磊张小康张键华胡俊飞张婷顾志鹏李乙文四川大学高分子科学与工程学院高分子材料工程国家重点实验室成都610065

传统仿生人造黑色素聚多巴胺(PDA)染发过程中涉及的过强碱性会使毛发粗糙影响发质,大量的金属离子则存在安全性问题.本工作利用黑色素单体5,6-二羟基吲哚(DHI)能够在温和条件下仅通过空气氧化发生快速聚合的特点,报道了一种通过温和条... 详细信息

传统仿生人造黑色素聚多巴胺(PDA)染发过程中涉及的过强碱性会使毛发粗糙影响发质,大量的金属离子则存在安全性问题.本工作利用黑色素单体5,6-二羟基吲哚(DHI)能够在温和条件下仅通过空气氧化发生快速聚合的特点,报道了一种通过温和条件在头发表面和内部原位聚合的人造黑色素染发材料.染发色度值L=21,与自然黑发基本一致,洗涤30次后L=25,耐洗涤性良好,染色后头发拉伸强度189 MPa,断裂伸长率51%,相比染色前发质有所改善.研究结果表明,此类染发剂染发条件温和(空气氧化),色度自然,固色持久,有助于改善发质,生物安全性良好,为开发新一代染发剂提供了创新的设计策略和可靠的工具平台.

关键词：人造黑色素聚二羟基吲哚染发剂仿生材料

Controlled Synthesis of Proton-Conductive porous Organic polymer Gels via Electrostatically Stabilized Colloidal Formation

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CCS Chemistry 2024年第7期6卷 1767-1775页

作者： Bin Chen yifeng Kuang Lu Liu Linkun Cai Zaoming Wang Panchao yin Liangbin Huang Cheng gu state key laboratory of Luminescent materials and Devices Institute of Polymer Optoelectronic Materials and DevicesSouth China University of TechnologyGuangzhou 510640 college of polymer science and engineering State Key Laboratory of Polymer Materials EngineeringSichuan UniversityChengdu 610065 key laboratory of Functional Molecular engineering of guangdong Province School of Chemistry and Chemical EngineeringSouth China University of TechnologyGuangzhou 510641 South china Advanced Institute for Soft Matter science and Technology South China University of TechnologyGuangzhou 510640 Institute for Integrated Cell-Material sciences Institute for Advanced StudyKyoto UniversityKyoto 606-8501

porous organic polymers(poPs)have attracted extensive interest due to their structural diversity and predesigned ***,the majority of poPs are synthesized as insoluble and unprocessable powders,which greatly impede their advanced applications because of limited mass transport and inadaptation for device ***,we report a controlled synthetic strategy of macroscopic poP gels by a cation-stabilized colloidal formation mechanism,which is widely adaptable to a large variety of tetra-/tri-amino build blocks for the synthesis of Tröger’s base-linked poP gels,aerogels,and ionic *** poP gels combined the integrated advantages of hierarchically porous structures and tailorable mechanical stiffness,whereas they could load substantial amounts of phosphoric acids and construct unimpeded transport pathways for proton conduction,exhibiting unprecedented proton conductivity at subzero *** strategy offers a new solution to the intractable processing issues of poPs toward device applications with cutting-edge performances.

关键词： porous organic polymers Tröger’s base linkage gels superprotonic conduction subzero temperatures