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| 1 | Selective synthesis of triacetin from glycerol catalyzed by HZSM-5/MCM-41 micro/mesoporous molecular sieve显示文摘HZSM-5/MCM-41 molecular sieve (H-ZM) catalysts with well-defined micro/mesoporous structures were synthesized and showed high performance for selective synthesis of triacetin via the esterification reaction of glycerol with acetic acid. The conversion of glycerol was demonstrated to be 100% and the triacetin selectivity was over 91%, which can be attributed to the synergistic effect regarding suitable acidic property, excellent diffusion efficiency and good stability derived from the combined advantages of microporous molecular sieve HZSM-5 and mesoporous molecular sieve MCM-41. | Jiangyong Liu Zihao Wang Yunlin Sun Ruiqi Jian Panming jian Dan Wang | 2019 | Chinese Journal of Chemical Engineering2019，27，5： | 3 |
| 2 | 新冠病毒肺炎疫情期间口罩能否经热水泡灭毒后重复使用?显示文摘新冠病毒肺炎疫情期间,口罩成为不可或缺的防控利器和战略物资。如何科学、安全、有效地重复使用口罩,让每一只口罩发挥最大效能,数倍甚至十倍以上地提高防护口罩的有效使用时间,是疫情防控所急需解决的关键科技问题。我们提出了“口罩荷电再生重复使用”的技术方法,并开展了再生口罩性能评价。首先将使用后的口罩浸泡在56℃以上热水中30min进行消毒处理,随后采用普通家用电吹风机等对“失效”的口罩进行吹干荷电处理,使口罩可重新荷电而再生静电效应。对市售的三类典型口罩(一次性医用口罩、医用外科口罩、KN95级防护口罩)进行“热水泡灭毒+荷电再生”处理,实验证明其过滤层微观结构和口罩抗渗水性均无明显变化,再生口罩对非油性颗粒物的过滤效率满足相关口罩指标要求。相关研究结果为新冠病毒肺炎疫情期间的口罩荷电再生重复使用提供了参考。进一步研究了真人佩戴过程对不同初始性能的口罩的性能演变。浙江闰土股份有限公司在2月20日至3月30日期间应用“口罩荷电再生重复使用技术”,将原先每个员工每日发放一个一次性医用口罩,改为每个员工每三日发放一个一次性医用口罩,节约口罩12.25万只,降低了公司的口罩使用量,也确保了防疫工作的正常开展。本文基于真实佩戴口罩的研究,建立了基于荧光纳米颗粒渗透探伤的口罩检测新方法,为可重复使用口罩材料设计、结构优化和性能综合评价提供参考。 | 王丹 孙宝昌 王洁欣 周芸芸 方彦 陈倬为 岳卫华 刘思敏 刘克洋 曾晓飞 初广文 陈建峰 | 2020 | Engineering2020，6，10： | 3 |
| 3 | 水性石墨烯量子点油墨的制备及印刷应用显示文摘石墨烯量子点(GQDs)具有来源广、量子效率高、毒性低等优点,在防伪印刷、显示器件、生物成像等领域具有广泛的应用价值。本研究以柠檬酸为碳源,采用自下而上的方法制备具有明亮荧光效果的蓝光石墨烯量子点材料,并采用喷墨打印、丝网印刷、手写等方式考察其油墨转移和光致发光特性。通过红外光谱对其表面官能团进行结构表征,利用紫外-可见与荧光光谱考察其荧光强度变化规律。进一步,将GQDs配制得到水性荧光油墨,调配黏度满足不同印刷工艺的要求,以弱荧光纸为承印基材,考察了油墨在纸张上的印刷防伪效果。研究表明,喷墨打印、手写及丝网印刷的方式均可实现油墨的良好转移,在日光及普通室内光源下纸张上的荧光油墨均无明显痕迹,利用365nm紫外光照射时可发出明显的蓝色荧光图案,具有典型的荧光防伪特点。同时,该印刷产品具有优异的光稳定性,利用紫外灯连续照射90min后仍然保持初始荧光强度。 | 陆利坤 问金月 焦守政 孙志成 | 2021 | 数字印刷2021，，3： | 2 |
| 4 | Recent advances on metal-free graphene-based catalysts for the production of industrial chemicals显示文摘With the development of carbon catalysts, graphene-based metal-free catalysts have drawn increasing attention in both scientific research and in industrial chemical production processes.In recent years,the catalytic activities of metal-free catalysts have significantly improved and they have become promising alternatives to traditional metal-based catalysts.The use of metal-free catalysts greatly improves the sustainability of chemical processes.In view of this,the recent progress in the preparation of graphene-based metal-free catalysts along with their applications in catalytic oxidation,reduction and coupling reactions are summarized in this review.The future trends and challenges for the design of graphene- based materials for industrial organic catalytic reactions with good stabilities and high catalytic performance are also discussed. | Zhiyong Wang Yuan Pu Dan Wang Jie-Xin Wang Jian-Feng Chen | 2018 | Frontiers of Chemical Science and Engineering2018，12，4： | 2 |
| 5 | High-gravity-assisted emulsification for continuous preparation of waterborne polyurethane nanodispersion with high solids content显示文摘In this work,we developed a continuous preparation strategy for the production of high-solidscontent waterborne polyurethane(WPU)emulsions via high-gravity-assisted emulsification in a rotating packed bed(RPB)reactor.By adjusting the experimental parameters and formula,WPU emulsions with a high solids content of 55%and alow viscosity were prepared.Preliminary applications of the high-solids-content WPU as a thermally insulating material were demonstrated.RPB emulsification is an economical and environmentally friendly production strategy because of the low energy consumption,short emulsification time,and effective devolatilization.This study demonstrated an effective method for preparation of high-solids-content WPU,moving toward commercialization and industrialization. | Weihong Zhang Dan Wang Jie-Xin Wang Yuan Pu Jian-Feng Chen | 2020 | Frontiers of Chemical Science and Engineering2020，14，6： | 1 |
| 6 | A multifunctional optoelectronic device based on 2D material with wide bandgap显示文摘Low-dimensional materials exhibit unique quantum confinement effects and morphologies as a result of their nanoscale size in one or more dimensions,making them exhibit distinctive physical properties compared to bulk counterparts.Among all low-dimensional materials,due to their atomic level thickness,two-dimensional materials possess extremely large shape anisotropy and consequently are speculated to have large optically anisotropic absorption.In this work,we demonstrate an optoelectronic device based on the combination of two-dimensional material and carbon dot with wide bandgap.High-efficient luminescence of carbon dot and extremely large shape anisotropy(>1500)of two-dimensional material with the wide bandgap of>4 eV cooperatively endow the optoelectronic device with multi-functions of optically anisotropic blue-light emission,visible light modulation,wavelength-dependent ultraviolet-light detection as well as blue fluorescent film assemble.This research opens new avenues for constructing multi-function-integrated optoelectronic devices via the combination of nanomaterials with different dimensions. | Hongwei Xu Jingwei Liu Sheng Wei Jie Luo Rui Gong Siyuan Tian Yiqi Yang Yukun Lei Xinman Chen Jiahong Wang Gaokuo Zhong Yongbing Tang Feng Wang Hui-Ming Cheng Baofu Ding | 2023 | Light(Science & Applications)2023，12，12： | 0 |
| 7 | 碳点示踪并促进大鼠骨髓间充质干细胞成骨分化的初步研究显示文摘目的:利用长波长碳点(CDs)标记大鼠骨髓间充质干细胞(BMSCs),探讨其示踪可能性及对细胞成骨分化的影响。方法:用透射电镜(TEM)、傅立叶红外光谱仪(FT-IR)检测CDs表征;用CCK-8法和流式细胞术筛选出CDs最佳成像浓度,将最佳浓度的CDs与BMSCs共培养后,通过多种跨膜抑制剂及4℃低温条件,探讨细胞摄取碳点的途径,并利用共聚焦显微镜观察细胞的成像特点,通过溶酶体探针进行荧光共定位以观察CDs在细胞内的分布,同时进行9 d的示踪;在共培养的第4、7天测细胞的碱性磷酸酶(ALP)活性,第21天通过茜素红检测矿化能力,第7和14天通过实时定量RT-PCR检测Runt相关转录因子2(Runx2)、骨钙素(Ocn)、骨桥蛋白(Opn)、骨形态发生蛋白2(Bmp2)、成骨细胞特异性转录因子Osterix等成骨相关基因的表达。结果:TEM下见CDs为球形颗粒,粒径平均为2.17 mm;FT-IR分析CDs表面富含羟基、氨基等基团;第1天50、100μg/m L浓度下的细胞活性明显升高,而浓度达到300μg/m L时,细胞活性降低,流式细胞术结果显示随CDs浓度升高,BMSCs的标记效率升高;成像结果显示BMSCs呈红色荧光图像,荧光区部分与溶酶体绿色荧光重叠,部分位于细胞质,但不进入细胞核;4℃培养抑制能量依赖性的内吞途径时,细胞摄取CDs的量明显减少;与对照组相比,CDs组的ALP活性、矿化能力及成骨相关基因表达均有升高。结论:CDs具有示踪并调节BMSCs成骨分化功能的潜力。 | 史凡 黄鉴栎 刘梅 王丹 章非敏 | 2021 | 口腔生物医学2021，12，1： | 0 |
| 8 | A General Strategy for Efficiently Constructing Multifunctional Cluster Fillers Using a Three-Fluid Nozzle Spray Drying Technique for Dental Restoration显示文摘Multifunctional fillers are greatly required for dental resin composites(DRCs).In this work,a spray dryer with a three-fluid nozzle was applied for the first time to construct high-performance complex nanoparticle clusters(CNCs)consisting of different functional nanofillers for dental restoration.The application of a three-fluid nozzle can effectively avoid the aggregation of different nanoparticles with opposite zeta potentials before the spray drying process in order to construct regularly shaped CNCs.For a SiO_(2)–ZrO_(2) binary system,the SiO_(2)–ZrO_(2) CNCs constructed using a three-fluid nozzle maintained their excellent mechanical properties((133.3±4.7)MPa,(8.8±0.5)GPa,(371.1±13.3)MPa,and(64.5±0.7)HV for flexural strength,flexural modulus,compressive strength,and hardness of DRCs,respectively),despite the introduction of ZrO_(2) nanoparticles,whereas their counterparts constructed using a two-fluid nozzle showed significantly decreased mechanical properties.Furthermore,heat treatment of the SiO_(2)-ZrO_(2) CNCs significantly improved the mechanical properties and radiopacity of the DRCs.The DRCs containing over 10%mass fraction ZrO_(2) nanoparticles can meet the requirement for radiopaque fillers.More importantly,this method can be expanded to ternary or quaternary systems.DRCs filled with SiO_(2)-ZrO_(2)-ZnO CNCs with a ratio of 56:10:4 displayed high antibacterial activity(antibacterial ratio>99%)in addition to excellent mechanical properties and radiopacity.Thus,the three-fluid nozzle spray drying technique holds great potential for the efficient construction of multifunctional cluster fillers for DRCs. | Dan-Lei Yang Dan Wang Hao Niu Rui-Li Wang Mei Liu Fei-Min Zhang Jie-Xin Wang Mei-Fang Zhu | 2022 | Engineering2022，8，1： | 0 |
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