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Porous Hafnium-Containing Acid/Base Bifunctional Catalysts for Efficient Upgrading of Bio-Derived Aldehydes

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Journal of Bioresources and Bioproducts 2021年第3期6卷 243-253页

作者： Fanglin Dai Junrong Luo Shenghui Zhou Xingzhen qin Detao Liu haisong qi School of Chemistry and Chemical Engineering Guangxi UniversityNanning 530004China State Key Laboratory of Pulp and Paper Engineering South China University of TechnologyGuangzhou 510640China

Novel organic-inorganic hybrids were synthesized by using HfCl 4 and organic ligand 1H-pyrrole-2,5-dicarboxylic acid(PDCA)via a simple hydrothermal *** as-prepared Hf-PDCA were characterized by various techniques,such as electron microscope,N_(2) adsorption/desorption,and X-ray photoelectron *** them,the porous and nitrogen-containing Hf-PDCA as heterogeneous acid/base bifunctional catalyst was then applied to the catalytic hydrogenation of furfural to produce furfuryl alcohol(FFA).It exhibited excellent catalytic performance,with high conversion(98.8%)and selectivity(98.5%)by using 2-propanol as hydrogen source under a relatively mild ***,the Hf-PDCA has strong stability and durability,and can be recovered after the catalyst *** addition,the Hf-PDCA as catalyst can be extended to fabricate corresponding alcohols by catalytic conversion of other biomass derived aldehydes.

关键词： Furfural furfuryl alcohol catalytic transfer hydrogenation bifunctional catalyst organic-inorganic hybrid

Structure Elucidation of Hydroxypropyl Cellulose Homogenously Prepared from NaOH/Urea Aqueous Solution

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Paper And Biomaterials 2016年第2期1卷 1-7页

作者： haisong qi Tao Song Fachuang Lu South China University of Technology School of Light Industry and Engineering GuangzhouGuangdong Province 510640 China Leibniz Institute of Polymer Research Dresden Hohe Str. 6 D-01069 Dresden Germany

Hydroxypropyl celluloses(HPC) were homogenously synthesized by the reaction of cellulose with propylene oxide in NaOH/urea aqueous ***-soluble HPC with molar degree of substitution(MSNMR) in the range of 0.52~0.78 was prepared from microcrystalline cellulose,cotton linters,and spruce sulfite *** structure of the HPC samples was characterized by means of FT-IR,NMR,gas chromatography(GC),and size exclusion chromatography(SEC) *** types of cellulose samples with different molecular weights were found to dissolve well in the NaOH/urea solvent with no obvious differences in reactivity and *** relative reactivity of hydroxyl groups in the glycosyl unit was in the following order:O-6>O-2>*** addition,the results of the study indicated that the tandem reaction during hydroxypropylation could be ignored.

关键词： hydroxypropyl cellulose NaOH/urea aqueous solution structure homogenous synthesis gas chromatography analysis

Synthesis of Amphiphilic Starch Derivatives Using One-pot Synthesis Procedure

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Paper And Biomaterials 2018年第1期3卷 1-9页

作者： Tao Song FengXia Yue XueZhu Xu ChunLin Xu Yi-Chen Li FaChuang Lu haisong qi State Key Laboratory of Pulp and Paper Engineering School of Light Industry and EngineeringSouth China University of Technology Department of Biochemistry and DOE Great Lakes Bioenergy Research Center Wisconsin Energy Institute University of Wisconsin–Madison Fiber and Polymer Science University of California Johan Gadolin Process Chemistry Centre Laboratory of Wood and Paper Chemistry Faculty of Science and Engineering ?bo Akademi University Biomaterials Innovation Research Center Department of Medicine Brigham and Women's Hospital Harvard Medical School

Amphiphilic starch derivatives with high content of functional groups were prepared from potato starch using a one-pot synthesis method with a single reaction medium for the entire procedure. Potato starch was benzylated, followed by the introduction of hydroxypropyltrimethylammonium(HPMA) moieties without the purification of intermediates. The synthesis was performed under heterogeneous conditions, leading to the formation of benzyl 2-hydroxypropyltri methylammonium starch chloride(BnHPMAS) with a total degree of substitution(DS) of up to 1.4. This process improved the efficiency of the preparation of amphiphilic starch derivatives and reduced the time and resources consumed by avoiding a separation process and purification of the intermediate *** DS of BnHPMAS was in the range of 0.36 to 1.4, which could be tuned by varying the molar ratio of the reagents to repeating unit or by changing the reaction temperature, time, and medium. The structure of the amphiphilic starches was characterized using elemental analysis, size exclusion chromatography,fourier transform infrared spectroscopy(FT-IR), and nuclear magnetic resonance(NMR) spectroscopy. Moreover, the surface tension and turbidity of the solutions of the products were measured for their potential application in the removal of dissolved and colloidal substances in paper cycling water.

关键词： amphiphilicstarchderivatives chemicalmodification degreeofsubstitution turbidity

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基于天然多糖的绿色表面活性剂

精细化工 2020年第10期37卷 1965-1976页

作者：王善勇项舟洋祁海松华南理工大学制浆造纸工程国家重点实验室广东广州510640

多糖分子结构具有两亲性,能够较好地吸附在相界面上并表现出改善固-液、液-液之间相容性的能力。此外,多糖独特的理化结构使其在溶液中具有良好的流变学性质以及形成凝胶网络的能力,能够在较低表面活性下体现出较好的界面吸附能力,常被... 详细信息

多糖分子结构具有两亲性,能够较好地吸附在相界面上并表现出改善固-液、液-液之间相容性的能力。此外,多糖独特的理化结构使其在溶液中具有良好的流变学性质以及形成凝胶网络的能力,能够在较低表面活性下体现出较好的界面吸附能力,常被用于多相体系的乳化、分散、增稠和稳定。化学改性可对天然多糖进行亲水-疏水平衡,并赋予其一定的化学活性、表面电荷、流变性能等,能够获得性能更加优异的绿色大分子表面活性剂。该文主要介绍了多糖在表面活性剂中的应用,主要包括纤维素、淀粉、半纤维素、甲壳素、天然树胶等,并从多糖独特的理化性质、结构以及改性特点出发,剖析其对乳化、分散、破乳、增溶等表面活性作用的影响,阐述多糖及其衍生物在表面活性剂中的研究进展及应用潜力。最后,指出非共价结合是一种具有很大发展潜力的多糖表面活性增强手段。

关键词：多糖表面活性剂化学改性两亲性凝胶网络

基于Biginelli反应可控合成糖支链纤维素的研究

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生物质化学工程 2024年第5期58卷 21-27页

作者：刘煜祁海松华南理工大学制浆造纸工程国家重点实验室广东广州510641

以乙酰乙酸纤维素酯为主链,葡萄糖、纤维二糖和纤维素纳米晶为支链,利用Biginelli反应成功合成了3种糖支链纤维素。通过核磁共振波谱、红外光谱、元素分析和X射线衍射对糖支链纤维素的分子结构进行了表征,结果表明:接枝点处新生成的官能... 详细信息

以乙酰乙酸纤维素酯为主链,葡萄糖、纤维二糖和纤维素纳米晶为支链,利用Biginelli反应成功合成了3种糖支链纤维素。通过核磁共振波谱、红外光谱、元素分析和X射线衍射对糖支链纤维素的分子结构进行了表征,结果表明:接枝点处新生成的官能团C=O(C=O)-NH、C—N、—NH的出现证明了葡萄糖支化纤维素、纤维二糖支化纤维素和纤维素支化纤维素的成功制备。单因素试验结果表明:合成3种糖支链纤维素的最佳反应条件为溶剂pH值5~6、反应时间10 h、反应温度70℃。其中,糖支链为葡萄糖(支链聚合度为1)且用量为0.6,主链取代度为0.87时,合成的糖支链纤维素葡萄糖支化纤维素的支化度最高,可达(11.82±0.57)%,产率可达(90.70±1.82)%;糖支链为纤维二糖(支链聚合度为2)且用量为0.4,主链取代度为0.87时,合成的糖支链纤维素纤维二糖支化纤维素的支化度最高,可达(7.30±0.11)%,产率可达(90.25±2.15)%;糖支链为纤维素纳米晶(支链聚合度为100)且用量为0.01,主链取代度为0.87时,合成的糖支链纤维素纤维素支化纤维素的支化度最高,可达(0.68±0.09)%,产率可达(92.45±1.25)%。

关键词：支链多糖乙酰乙酸纤维素酯 Biginelli反应分子结构

两亲性海藻多糖在乳化和分散中应用的研究进展

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生物质化学工程 2022年第1期56卷 37-46页

作者：王善勇祁海松项舟洋华南理工大学制浆造纸工程国家重点实验室广东广州510640

海藻多糖是一种天然的凝胶多糖,其分子链上原生的亲水、疏水基团赋予其天然的两亲性,能够在一定程度上改善非均相之间的界面相容性,具有天然凝胶网络结构的海藻多糖还可在溶胶体系中有效阻止分散相之间的再聚集,因而海藻多糖在乳化及分... 详细信息

海藻多糖是一种天然的凝胶多糖,其分子链上原生的亲水、疏水基团赋予其天然的两亲性,能够在一定程度上改善非均相之间的界面相容性,具有天然凝胶网络结构的海藻多糖还可在溶胶体系中有效阻止分散相之间的再聚集,因而海藻多糖在乳化及分散中具有极佳的应用潜能。本文介绍了海藻酸盐、岩藻多糖、卡拉胶、琼脂、石莼多糖等常见海藻多糖的化学组成、结构与性质,并从其糖基单元上的羧基、硫酸酯基等亲水基团与甲氧基、乙酰基、蛋白质等疏水基团构成的两亲性结构出发,总结了两亲性结构对海藻多糖分子构型、表面活性及流变性质的影响,进而综述海藻多糖两亲性结构在乳化和分散中的应用。同时,还总结了通过物理或化学手段增强海藻多糖两亲性能的相关研究,例如带电疏水粒子的静电耦合、长碳链疏水化合物的化学接枝等,介绍了衍生化海藻多糖在乳化和分散中应用的研究进展,并对海藻多糖界面吸附活性增强的方向进行了展望。

关键词：海藻多糖两亲性乳化分散界面相容性凝胶网络

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投影显示亮度均匀性稳健校正方法

光学学报 2009年第4期29卷 918-922页

作者：陶奇徐海松邹文海余培英浙江大学现代光学仪器国家重点实验室浙江杭州310027 上海市计量测试技术研究院上海201203

随着投影仪的发展,其显示质量越来越受到人们关注。投影显示中普遍存在亮度不均匀性问题,且大部分高灰度图像在亮度校正后易出现饱和。而一般的剪切法会极大地降低像面均匀性。为解决这个问题,基于投影仪相机系统建立系统光度学模型,在... 详细信息

随着投影仪的发展,其显示质量越来越受到人们关注。投影显示中普遍存在亮度不均匀性问题,且大部分高灰度图像在亮度校正后易出现饱和。而一般的剪切法会极大地降低像面均匀性。为解决这个问题,基于投影仪相机系统建立系统光度学模型,在传统线性映射方法的基础上提出了一种亮度不均匀性校正的非线性稳定算法。实验表明,采用的投影仪在校正前其图像显示亮度从中心到边缘下降了近50%,像面不均匀性的相对均方根误差(RRMS)为17.7%;而饱和图像校正后像面的RRMS为1.69%,几乎达到了与未饱和图像(1.55%)相同的校正精度,同时基本保持了显示图像的平均亮度水平。

关键词：投影显示亮度均匀性校正投影仪相机系统饱和补偿

Bionic Body Wave Control for an Eel-Like Robot Based on Segmented Soft Actuator Array

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Bionic Body Wave Control for an Eel-Like Robot Based on Segm...

血清前列腺特异性抗原和α-甲酰辅酶A消旋酶水平对前列腺癌根治术后患者预后的预测价值

第40届中国控制会议

作者： Ronghao Dang haisong Gong Yuxin Wang Tianyi Huang Zhuofan Shi Xinwen Zhang Yunfeng Wu Yi Sun Peng qi Tongji University University of Twente Australian Center for Field Robotics and Sydney Institute for Robotics and Intelligent Systems University of Sydney

Using body wave to swing forward is the most common propulsion method for underwater creatures,which can achieve flexible swing and multi-directional *** robotics researches in recent years employed rigid structure and hinge connection to build the entire swing body,which were driven by conventional ***,soft robotics provides an alternative to make the robot behave like a bionic fish in terms of swing flexibility,actuation and *** this article,the authors develop the entire eel-like fish with a fully soft flexible body,which is composed of four fiber-reinforced,bidirectionally bending,fluidic elastomer actuators（FEAs） as its *** robotic fish tail has multiple segments connected in series with different waveforms to make the overall fish tail exhibit fluctuating forward *** FEA uses the typical dual-chamber configuration,and PWM sine wave signals are utilized to effectively control such a hydraulic *** experiments,the swing of each tail section is tested,and various factors with respect to the swing frequency and amplitude are *** results illustrate the feasibility and superiority of the proposed body wave control method.

关键词： body wave control soft robotic fish FEAs

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新乡医学院学报 2023年第11期40卷 1056-1060页

作者：郭晓翔朱海松张超刘起驻马店市中心医院泌尿外一科河南驻马店463000

目的探讨血清前列腺特异性抗原(PSA)、α-甲酰辅酶A消旋酶(AMACR)水平在前列腺癌根治术前后的变化及其对预后的预测价值。方法选择2017年1月至2020年1月驻马店市中心医院收治的128例前列腺癌患者为研究对象。患者均行前列腺癌根治术治疗... 详细信息

目的探讨血清前列腺特异性抗原(PSA)、α-甲酰辅酶A消旋酶(AMACR)水平在前列腺癌根治术前后的变化及其对预后的预测价值。方法选择2017年1月至2020年1月驻马店市中心医院收治的128例前列腺癌患者为研究对象。患者均行前列腺癌根治术治疗,根据其预后情况分为预后良好组(n=97)和预后不良组(n=31)。收集患者的年龄、体质量指数(BMI)、肿瘤最大径、前列腺体积、病理类型、淋巴结转移、远处转移、TNM分期、分化程度、Gleason评分、切缘等基本资料。分别于术前及术后7 d,抽取患者空腹静脉血5 mL,1500 r·min^(-1)离心10 min,留取血清,采用酶联免疫吸附法测定血清PSA、AMACR水平。比较患者手术前后的血清PSA、AMACR水平,采用单因素分析影响前列腺癌根治术后患者预后的相关因素,logistic回归分析影响前列腺癌根治术后患者预后的危险因素,受试者操作特征(ROC)曲线分析血清PSA、AMACR水平对前列腺癌根治术后患者预后不良的预测价值。结果前列腺癌患者根治术后的血清PSA、AMACR水平显著低于术前(P0.05);预后不良组患者TNM分期Ⅲ~Ⅳ期占比、淋巴结转移占比、低分化占比、Gleason评分≥7分占比、切缘阳性占比及术前血清PSA、AMACR水平显著高于预后良好组(P<0.05);logistic分析结果显示,TNM分期Ⅲ~Ⅳ期、淋巴结转移、低分化程度、高Gleason评分、切缘阳性及高血清PSA、AMACR水平是影响前列腺癌根治术后患者预后不良的危险因素(P<0.05);ROC曲线分析显示,血清PSA、AMACR水平预测前列腺癌根治术后患者预后不良的曲线下面积(AUC)分别为0.796、0.824,二者联合预测前列腺癌根治术后患者预后不良的AUC为0.916;血清PSA与AMACR水平联合预测前列腺癌根治术后患者预后不良的AUC显著大于血清PSA和AMACR水平单独预测(P<0.05)。结论血清PSA、AMACR水平异常升高是前列腺癌根治术后患者预后不良的危险因素,二者联合检测对前列腺癌根治术后患者预后不良有较高的预测价值。

关键词：前列腺特异性抗原 α-甲酰辅酶A消旋酶前列腺癌根治术预后