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Comparison of Flame-retardancy Property and Mechanism between a Phosphate Ester and a Phosphoramine Flame-retardants

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Journal of Wuhan University of Technology(Materials Science) 2021年第1期36卷 148-156页

作者： QIN Shiqian yang Zhiyi ZHANG Shuai ZHANG Zhiye WANG Xinlong yang xiushan LUO Tao yang Lin School of Chemical Engineering Sichuan UniversityChengdu 610065China

A halogen-free flame-retardant (hydroquinone bis (N,N’-diarylphosphoramidate),4N-HDP) containing phosphorus-nitrogen was *** structure was characterized by infrared spectroscopy (IR),nuclear magnetic resonance (^(1)H-NMR and^(31)P-NMR).Thermogravimetric analysis (TG),limiting oxygen index (LOI),UL-94 vertical burning test (UL-94),thermogravimetric-infrared instrument (TG-IR) and scanning electron microscopy (SEM) were used to compare the flame-retarding performance and mechanism of hydroquinone bis (diphenyl phosphate) (HDP) and ***,IR and TG-IR were used for comparative analysis,indicating that both HDP and 4N-HDP are flame-retardants,and the gas phase and condensed phase act *** the pyrolysis process,it is divided into two steps:the first step is the breakage of large molecules to small molecules;the second step is the gasification and carbonization of small molecules,and eventually produces phosphate ester and non-flammable *** the comparison of various results,it could be found that 4N-HDP has better flame-retarding performance compared to HDP in the composite with polycarbonate (PC).

关键词： flame-retardant phosphoramine thermogravimetric analysis polycarbonates TG-IR

Solubility and solution thermodynamics of ammonium dihydrogen phosphate in the water–methanol system

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Chinese Journal of Chemical Engineering 2019年第10期27卷 2518-2525页

作者： Dejun Xu Dehua Xu Yanjun Zhong Tao Luo xiushan yang Zhiye Zhang Lin yang Xinlong Wang School of Chemical Engineering Sichuan UniversityChengdu 610065China

The solubility of ammonium dihydrogen phosphate(MAP)in the water–methanol system is essential for antisolvent crystallization *** investigate the effect of methanol on the solubility of MAP in water,the solubility of MAP in the water–methanol system was determined by dynamic method and static equilibrium method at temperatures ranging from 293.2 to 343.2 K at atmospheric *** showed that the solubility of MAP increased with the increase of temperature and the increase of water mole fraction in the water–methanol *** experimental solubility data were correlated with the modified Apelblat equation,the combined nearly ideal binary solvent/Redlich–Kister(CNIBS/R–K)model and the Jouyban–Acree *** calculated results based on these three models were in very good agreement with the experimental data with the average relative deviations of 0.65%,0.97%,and 5.38%,***,the thermodynamic properties of the MAP dissolution process in the water–methanol system,including Gibbs energy change,enthalpy,and entropy were obtained by the Van’t Hoff equation,which can be used to assess the crystallization process.

关键词： Ammonium dihydrogen phosphate Solubility Water–methanol system

Leaching calcium from phosphogypsum desulfurization slag by using ammonium chloride solution: Thermodynamics and kinetics study

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Chinese Journal of Chemical Engineering 2020年第1期28卷 208-215页

作者： Yanjun Zhong Ting Shi Qiuge Chen xiushan yang Dehua Xu Zhiye Zhang Xinlong Wang Benhe Zhong School of Chemical Engineering Engineering Research Center of Comprehensive Utilization and Clean Processing of Phosphorus Resources of Ministry of EducationSichuan UniversityChengdu 610065China

Phosphogypsum(PG) desulfurization slag is a calcium-rich residue from reductive decomposition of PG using sulfur as the reductant. We proposed a technology of preparation light calcium carbonate with PG desulfurization slag, which mainly contains two steps: leaching and carbonizing. In this work, we concentrated on the former, in which ammonium chloride aqueous solution was utilized as leaching agent to extract calcium from the slag, and conducted thermodynamics and kinetics study on it. Fact Sage software was employed to do thermodynamic and phase equilibrium diagram calculations. The influence of leaching conditions including agitation speed, initial concentration of leaching solution, reaction temperature, and liquid/solid ratio on the calcium leaching rate was discussed in detail by means of experiment optimal design. A kinetic model developed from the shrinking core model was given to describe the leaching process. The apparent kinetic activation energy(Ea) of the leaching reaction was calculated to be 10.58 kJ·mol^-1.

关键词： PG desulfurization slag Leaching process Thermodynamics Kinetic model

Construction of a recombinant yeast strain converting xylose and glucose to ethanol

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Frontiers in Biology 2008年第2期3卷 165-169页

作者： Shen TIAN Jinxin ZANG Yaping PAN Jikai LIU Zhenhong YUAN Yongjie YAN xiushan yang College of Life Science Capital Normal UniversityBeijing 100037China East China University of Science and Technology Shanghai 200237China

Candida shehatae gene xyl1 and Pichia stipitis gene xyl2,encoding xylose reductase(XR)and xylitol dehydrogenase(XD)respectively,were amplified by *** genes xyl1 and xyl2 were placed under the control of promoter GAL in vector pYES2 to construct the recombinant expression vector *** the vector pYES2-P12 was transformed into *** YS58 by LiAc to produce the recombinant yeast *** alcoholic ferment indicated that the recombinant yeast YS58-12 could convert xylose to ethanol with the xylose consumption rate of 81.3%.

关键词： recombinant Saccaromyces cerevisiae xyl1 xyl2 xylose glucose ethanol

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我国生物质能发展战略的几点意见

化学进展 2007年第7期19卷 1060-1063页

作者：匡廷云白克智杨秀山中国科学院植物研究所北京100093 首都师范大学生命科学院北京100037

本文介绍了国内外生物质能发展的现状与趋势,概述了我国生物质能源近期和远期的潜力。指出研发高新技术是我国生物质能发展的关键。建议以扩大资源总量、提升能源转换的加工技术水平和能源利用效率等为重点。

关键词：生物质能生产潜力生物燃料高技术

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高产丙酮丁醇梭菌的诱变筛选及特性研究

太阳能学报 2014年第1期35卷 36-40页

作者：高凯李云田沈杨秀山首都师范大学生命科学学院北京100048

使用亚硝基胍对实验室保藏的丙酮丁醇梭菌Clostridium acetobutylicum进行诱变,并结合外源添加丁醇的平板培养基对诱变菌株进行筛选,得到一株高产丁醇菌株。以60g/L葡萄糖为底物,37℃,发酵60h,该菌株丁醇及总溶剂产量分别比对照菌株提高... 详细信息

使用亚硝基胍对实验室保藏的丙酮丁醇梭菌Clostridium acetobutylicum进行诱变,并结合外源添加丁醇的平板培养基对诱变菌株进行筛选,得到一株高产丁醇菌株。以60g/L葡萄糖为底物,37℃,发酵60h,该菌株丁醇及总溶剂产量分别比对照菌株提高了39.3%和48.4%。为了使溶剂产量最大化,针对不同底物浓度对溶剂产量的影响进行研究。结果表明,诱变菌株在利用80g/L葡萄糖为底物,发酵70h,得到最大总溶剂产量23.47g/L。

关键词：丙酮丁醇梭菌 NTG诱变丁醇耐受高底物浓度

纤维素酶细胞表面展示酵母菌群的构建及纤维素乙醇的发酵优化研究

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太阳能学报 2015年第3期36卷 696-702页

作者：杨非金怡莫春玲杨秀山田沈首都师范大学生命科学学院北京100048

利用酵母细胞表面展示技术,以酿酒酵母菌株Saccharomyces cerevisiae Y5为受体,通过a-凝集素锚定方式,将来自丝状真菌Trichoderma reesei的内切葡聚糖酶II(EGII)、纤维二糖水解酶II(CBHII)以及来自Aspergillus aculeatus的β-葡糖苷酶I(BGLI)展示在细胞表面,构建同时表达3种纤维素酶的酵母菌群系统。结果表明,固定展示在细胞表面的纤维素酶在发酵过程中可保持较好的酶活性和稳定性;同时在EGII、CBHII和BGLI协同作用下使酵母细胞能水解纤维素并产生乙醇。将重组菌株Y5/EGII、Y5/CBHII和Y5/BGLI按1∶1∶1、1∶2∶1和2∶1∶1组合为不同的实验组,发酵结果显示,组合比为2∶1∶1的实验组效果最佳,最高乙醇浓度达到0.76 g/L,乙醇产量为0.33 g/g,相当于理论值的64.9%。

关键词：酵母表面工程 a-凝集素菌群优化纤维素乙醇

提高Pichia stipitis乙醇耐受和抑制剂耐受能力的菌种驯化

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太阳能学报 2013年第4期34卷 714-717页

作者：杨秀山张思晋左壮田沈首都师范大学生命科学学院北京100048

为实现对汽爆预处理玉米秸秆未脱毒直接酶解和发酵产乙醇,对Pichia stipitis菌种进行提高乙醇耐受和抑制剂耐受能力的驯化。通过逐步提高底物葡萄糖浓度和发酵抑制剂浓度的方法,Pichia stipitis的乙醇和抑制剂耐受能力得到明显提高。结... 详细信息

为实现对汽爆预处理玉米秸秆未脱毒直接酶解和发酵产乙醇,对Pichia stipitis菌种进行提高乙醇耐受和抑制剂耐受能力的驯化。通过逐步提高底物葡萄糖浓度和发酵抑制剂浓度的方法,Pichia stipitis的乙醇和抑制剂耐受能力得到明显提高。结果表明:驯化菌株能在36h内将188.96g/L的葡萄糖代谢完全,乙醇浓度达到88.39g/L,乙醇产率为0.47g/g,达到理论值的92.2%;在含有不同浓度梯度的糠醛模拟水解液中,驯化菌株能耐受的最高糠醛浓度达到5.34g/L,乙醇产率0.45g/g,占理论值87.8%。利用该驯化菌株可进一步开展对未脱毒汽爆酶解液直接发酵研究工作。

关键词： Pichia stipitis 菌种驯化乙醇耐受和抑制剂耐受乙醇生产

酿酒酵母细胞表面展示技术在燃料乙醇生产中的应用及研究进展

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生物工程学报 2012年第8期28卷 901-911页

作者：杨非曹萌金怡杨秀山田沈首都师范大学生命科学学院北京100048

酿酒酵母Saccharomyces cerevisiae细胞表面展示表达系统是一种固定化表达异源蛋白质的真核展示系统,具有糖基化作用及蛋白翻译后折叠等优势,更利于基因工程操作。近年来,酵母细胞表面工程作为一种新兴策略来固定化淀粉水解酶、纤维素... 详细信息

酿酒酵母Saccharomyces cerevisiae细胞表面展示表达系统是一种固定化表达异源蛋白质的真核展示系统,具有糖基化作用及蛋白翻译后折叠等优势,更利于基因工程操作。近年来,酵母细胞表面工程作为一种新兴策略来固定化淀粉水解酶、纤维素水解酶以及木聚糖降解酶,从而应用于燃料乙醇的生产。文中着重介绍了酵母细胞表面展示系统的基本原理、研究现状以及在生物乙醇生产中的应用前景及所面临的挑战。

关键词：酵母细胞表面展示生物乙醇淀粉分解酶纤维素分解酶统合生物加工