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Effect of High Pressure Homogenization Treatment on Structure and Properties of Soybean Residue Cellulose Nanofibers

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Paper And Biomaterials 2019年第4期4卷 37-44页

作者： Peiyi Li Yumeng Wang Binyao Zhou Qingqing Hou Hezhen Liu Haozhe Lei boxing jian Xinping Li College of Bioresources Chemical and Materials Engineering National Demonstration Center for Experimental Light Chemistry Engineering EducationShaanxi University of Science and TechnologyXi’anShaanxi Province710021China State Key Laboratory of Pulp and Paper Engineering South China University of TechnologyGuangzhouGuangdong Province510640China Department of Chemical and Paper Engineering Western Michigan UniversityKalamazooMichigan49008USA Key Laboratory of Paper Based Functional Materials of China National Light Industry Xi’anShaanxi Province710021China Shaanxi Provincial Key Laboratory of Papermaking Technology and Specialty Paper Development Xi’anShaanxi Province710021China

To reduce the adverse effects of non-cellulose materials on subsequent homogenization,the effects of a high-pressure homogenization treatment on the structure and properties of cellulose nanofibers(CNF)prepared by acid treatment of soybean residue were *** effects of the number of homogenization step on the microfibrillation degree,crystalline structure and mechanical properties of the soybean residue were analyzed by SEM,FT-IR,XRD,TG and *** results showed that an increase in the number of homogenization steps led to an increase in the degree of microfibrillation,a more uniform distribution of the CNF diameter,and an increase in the crystallinity of ***,but when the number of homogenization steps exceeded 15,the rate of change decreased,and the crystallinity of CNF *** the number of homogenization steps increased,the average degree of polymerization and average molecular weight of CNF decreased continuously,and after 15 homogenization steps,their rate of change also ***,15 steps of high-pressure homogenization represented a suitable number of steps to prepare the soybean residue CNF with an average diameter of 15 nm.

关键词： soybean residue cellulose nanofibers high pressure homogenization characteristics

Okara Cellulose Nanofibrils Produced by Pretreatment with Sustainable Deep Eutectic Solvent Coupled with Various Mechanical Treatments

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Paper And Biomaterials 2022年第2期7卷 46-55页

作者： Peiyi Li Haozhe Lei boxing jian Ruiyan Liu Miaomiao Zhou Yumeng Wang Hezhen Liu Yun Wang Bingyao Zhou College of Bioresources Chemical and Materials Engineering National Demonstration Center for Experimental Light Chemistry Engineering EducationShaanxi University of Science and TechnologyXi'anShaanxi Province710021China Key Laboratory of Paper Based Functional Materials of China National Light Industry Xi'anShaanxi Province710021China Shaanxi Provincial Key Laboratory of Papermaking Technology and Specialty Paper Development Xi'anShaanxi Province710021China Department of Chemical and Paper Engineering College of Engineering and Applied ScienceWestern Michigan University4651 Campus DrKalamazooMichigan49008US

In this study,a green,environmentally friendly method for rapid cellulose nanofribril(CNF)preparation with a significant cost advantage was *** with a deep eutectic solvent(DES)synthesized from oxalic acid dihydrate and choline chloride(ChCl-O)was combined with various mechanical treatment methods to produce okara CNFs from agricultural waste,with different diameter *** results showed that high-speed stirring produced CNFs with an average diameter of 27 *** method was advantageous because it consumed about 94%less energy than traditional high-pressure homogenization *** DES recovery rate was more than 90%,and DES served as a highly effective treatment,indicating that DES pretreatment is an economical,convenient,and effective strategy for okara CNF preparation.

关键词： okara deep eutectic solvent(DES) cellulose nanofibril(CNF) high-speed stirring high-pressure homogenization recovery

低共熔溶剂预处理制备豆渣纤维素纳米纤丝的研究

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中国造纸 2021年第6期40卷 28-33页

作者：李佩燚简博星李新平雷镐哲王雨萌刘鹤震刘瑞岩陕西科技大学轻工科学与工程学院陕西西安710021

采用氯化胆碱-草酸、氨基磺酸-尿素、氯化胆碱-柠檬酸分别经混合加热法制备了3种低共熔溶剂(DES),探讨了不同低共熔溶剂对豆渣纤维素预处理效果的影响。结果表明,3种DES均能够提纯豆渣纤维素,其中氯化胆碱-草酸体系对豆渣提纯纤维素效... 详细信息

采用氯化胆碱-草酸、氨基磺酸-尿素、氯化胆碱-柠檬酸分别经混合加热法制备了3种低共熔溶剂(DES),探讨了不同低共熔溶剂对豆渣纤维素预处理效果的影响。结果表明,3种DES均能够提纯豆渣纤维素,其中氯化胆碱-草酸体系对豆渣提纯纤维素效果最好,综纤维素含量为95.81%,且得到的α-纤维素含量高达92.60%,经高压均质后得到豆渣纤维素纳米纤丝(CNF),其直径为27~30 nm。氯化胆碱-柠檬酸体系和氨基磺酸-尿素体系分别预处理的豆渣经高压均质制备得到的纤维直径在0.1~0.5μm左右,未达到纳米级。

关键词：低共熔溶剂预处理豆渣纤维素纳米纤丝

Dispersion characteristics of fine particles in water,ethanol and kerosene

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Chinese Science Bulletin 2000年第15期45卷 1376-1380页

作者： REN Jun LU Shouci SHEN jian HU boxing Center of Research on Surface and Interface Chemical Engineering and Technology Nanjing UniversityNanjing 210093China College of Resources Engineering University of Science and Technology BeijingBeijing 100083China

Dispersion behavior of hydrophilic calcium carbonate particles and hydrophobic talcum particles in water, ethanol and kerosene media has been studied by sedimentation analysis. It is found that the dispersion of fine particles complies with the principle of polarity compatibility. That is to say, the dispersion effect will be improved when surface polarity of particles is similar to that of liquid media. The adsorption models of oleic acid on the surface of particles in water and ethanol are proposed.

关键词： fine particles aqueous medium dispersion behavior adsorption model.

Anti-aggregation dispersion of ultrafine particles by electrostatic technique

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Chinese Science Bulletin 2001年第9期46卷 740-743页

作者： REN Jun LU Shouci SHEN jian YU Chunhong HU boxing Center of Research on Surface and Interface Chemical Engineering and Technology Nanjing UniversityNanjing 210093China College of Resources Engineering University of Science and Technology BeijingBeijing 100083China

The dispersion of ultrafine particles in the air can be achieved by mechanical method or surface modification. In this work, the electrostatic technique was first employed for anti-aggregation of ultrafine particles. When the relative humidity of the air is within the region of 70%-75%, effective storage time of ultrafine particles can reach 72 h after treatment by the electrostatic technique. The experimental results showed that this technique imparted ultrafine particles much more pronounced anti-aggregation property. In the dry air, the critical diameter of ultrafine particles anti-aggregated by the electrostatic technique is the function of particle property and charging field intensity. The critical diameter is inversely proportional to the square of the charging field intensity.

关键词： ultrafone particle anti-aggregation dispersion electrostatic technique dispersion degree.

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陈氏太极拳训练营在卒中后抑郁患者中的应用

中国当代医药 2024年第4期31卷 58-61,66页

作者：王健魏文钟珊刘宏文广东省人民医院赣州医院赣州市立医院神经内科江西赣州341000 广东省人民医院赣州医院赣州市立医院康复科江西赣州341000 广东省人民医院赣州医院赣州市立医院急诊科江西赣州341000

目的观察陈氏太极拳训练营在卒中后抑郁患者中的应用效果。方法选取2021年9月至2022年9月于广东省人民医院赣州医院住院治疗的80例卒中后抑郁患者为研究对象,按照随机数字表法将其分为对照组(40例)和试验组(40例)。对照组实施常规康复... 详细信息

目的观察陈氏太极拳训练营在卒中后抑郁患者中的应用效果。方法选取2021年9月至2022年9月于广东省人民医院赣州医院住院治疗的80例卒中后抑郁患者为研究对象,按照随机数字表法将其分为对照组(40例)和试验组(40例)。对照组实施常规康复治疗方案,试验组在基础康复治疗基础上实施陈氏太极拳训练营干预,两组均干预8周。比较两组患者干预前、干预4、8周后的抑郁状态、日常生活能力、上下肢功能恢复、睡眠质量、生活质量情况。结果两组干预4、8周后汉密尔顿抑郁量表(HAMD)评分低于干预前,且试验组低于对照组,差异有统计学意义(P<0.05);两组干预4、8周后Barthel指数(BI)评分高于干预前,且试验组高于对照组,差异有统计学意义(P<0.05);两组干预4、8周后Fugl-Meyer评定量表(FMA)上肢、下肢评分高于干预前,且试验组高于对照组,差异有统计学意义(P<0.05);两组干预4周、8周后匹兹堡睡眠质量指数量表(PSQI)评分低于干预前,生活质量指数(QLI)高于干预前,且试验组PSQI评分低于对照组,QLI评分高于对照组,差异有统计学意义(P<0.05)。结论陈氏太极拳训练营可改善卒中后抑郁患者抑郁状况,提高睡眠质量,促进上肢功能、日常生活能力及生活质量的提升。

关键词：陈氏太极拳训练营卒中后抑郁肢体功能日常生活能力睡眠质量

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膳食纤维保健酸奶的研制

乳业科学与技术 2005年第2期27卷 67-69页

作者：印伯星孙健张翠英扬州大学实验农牧场江苏扬州225009 扬州大学食品学院江苏扬州225001

以膳食纤维和低聚木糖为功能因子,研究了膳食纤维保健酸奶的生产配方和生产工艺。试验结果表明:膳食纤维添加量为1.5%、低聚木糖添加量为0.3%、白砂糖6.0%、复合稳定剂0.6%,并采用微波杀菌技术,制成的膳食纤维保健酸奶具有营养和保健双... 详细信息

以膳食纤维和低聚木糖为功能因子,研究了膳食纤维保健酸奶的生产配方和生产工艺。试验结果表明:膳食纤维添加量为1.5%、低聚木糖添加量为0.3%、白砂糖6.0%、复合稳定剂0.6%,并采用微波杀菌技术,制成的膳食纤维保健酸奶具有营养和保健双重功效。

关键词：膳食纤维保健酸奶生产配方生产工艺低聚木糖

Preliminary results of strong ground motion simulation for the Lushan earthquake of 20 April 2013,China

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Earthquake Science 2013年第3期26卷 191-197页

作者： Gengshang Zhu Zhenguo Zhang jian Wen Wei Zhang Xiaofei Chen School of Earth and Space Sciences University of Science and Technology of China Laboratory of Seismology and Physics of Earth’s Interior University of Science and Technology of China

The earthquake occurred in Lushan County on 20 April, 2013 caused heavy casualty and economic loss. In order to understand how the seismic energy propagates during this earthquake and how it causes the seismic haz- ard, we simulated the strong ground motions from a rep- resentative kinematic source model by Zhang et al. （Chin J Geophys 56（4）：1408-1411, 2013） for this earthquake. To include the topographic effects, we used the curved grids finite difference method by Zhang and Chen （Geophys J Int 167（1）：337-353, 2006）, Zhang et al. （Geophys J Int 190（1）：358-378, 2012） to implement the simulations. Our results indicated that the majority of seismic energy con- centrated in the epicentral area and the vicinal Sichuan Basin, causing the XI and VII degree intensity. Due to the strong topographic effects of the mountain, the seismic intensity in the border area across the northeastern of boxing County to the Lushan County also reached IX degree. Moreover, the strong influence of topography caused the amplifications of ground shaking at the moun- tain ridge, which is easy to cause landslides. These results are quite similar to those observed in the Wenchuan earthquake of 2008 occurred also in a strong topographic mountain area.

关键词： Lushan earthquake Strong groundmotion Topographic effects Seismic intensity

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我国水库大坝风险管理

中国水利 2008年第12期 10-13页

作者：彭雪辉赫健施伯兴水利部大坝安全管理中心南京210029 浙江省水利厅杭州310009

针对目前我国水库大坝安全管理的现状,提出采用风险管理的思路。介绍了大坝风险管理的基本概念,提出我国大坝风险管理的原则及需要解决的一些关键技术,并就降低我国大坝风险提出了相应对策。

关键词：水库大坝安全管理风险管理对策