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Effects of Irradiation on the Structure-activity Relationship of Konjac Glucomannan Molecular Chain Membrane 被引量:1
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作者 吴春华 彭述辉 +6 位作者 温成荣 王丽霞 熊波 刘雅楠 范琳琳 姚闽娜 庞杰 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2012年第6期857-866,共10页
To know the effects of irradiation on the konjac glucomannan (KGM) molecular chain membrane, KGM membrane solution was treated with the irradiation dose of 0-20 kGy in this study, and the structure and properties of... To know the effects of irradiation on the konjac glucomannan (KGM) molecular chain membrane, KGM membrane solution was treated with the irradiation dose of 0-20 kGy in this study, and the structure and properties of KGM membrane were analyzed with Infrared spectrum, Raman spectrum, X-ray, SEM scanning and so on. The results revealed that the effects of different irradiation doses on the KGM molecular chain structure were different. Higher irradiation dose (20 kGy) resulted in partial damage against KGM membrane crystal structure, and there was no obvious change for the amorphous structure; with membrane property test, the tensile strength of KGM membrane gradually increased with the increase of irradiation dose and its elongation at break reduced, but these changes were not significant, WVP value reduced; with SEM, the membrane surface treated with irradiation was smoother even than the membrane without treatment. In addition, when increasing the irradiation dose, membrane surface became more even, and arrangement was more orderly and compact. KGM membrane nrooerties, and it is an ideal Irradiation modification could effectively improve the modification method. 展开更多
关键词 KGM molecular chain irradiation modification membrane structure MECHANICALPROPERTY
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Superhydrophobic modification of ceramic membranes for vacuum membrane distillation 被引量:11
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作者 Yanhui Yang Qianqian Liu +4 位作者 Haizhi Wang Fusheng Ding Guoshan Jin Chunxi Li Hong Meng 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2017年第10期1395-1401,共7页
The hydrophobically modi fied ceramic membranes have great potential for energy-ef ficient membrane distillation.In this work,flat-sheet ceramic membranes with a superhydrophobic surface were fabricated by grafting 1H... The hydrophobically modi fied ceramic membranes have great potential for energy-ef ficient membrane distillation.In this work,flat-sheet ceramic membranes with a superhydrophobic surface were fabricated by grafting 1H,1H,2H,2H-per fluorooctyltrichlorosilane or 1H,1H,2H,2H-per fluorodecyltriethoxysilane and followed by ultraviolet irradiation.The surface water contact angle was improved from 46° of original ceramic membrane to 159°,which exhibited a stable and excellent superhydrophobic effect.The modi fied membranes showed a high flux of 27.28 kg·m^(-2)·h^(-1) and simultaneously maintained an excellent retention rate of 99.99%,when used in vacuum membrane distillation process for treatment of a 1 wt% NaCl(75 °C) aqueous solution.These results suggested that superhydrophobic modi fication of ceramic surface is a facile and cost-effective way to achieve higher membrane distillation performance.The superhydrophobically-modi fied ceramic membrane with an excellent desalination capacity would show considerable potential in practical membrane distillation utilizations. 展开更多
关键词 Superhydrophobic modification Fluoroalkylsilane Ultraviolet irradiation Ceramic membrane Vacuum membrane distillation
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Study on the Surface Modification of Hydrophobic Polyacrylate Intraocular Lens 被引量:2
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作者 TANG Hui-qin WANG Gui-qin GU Han-qing 《Chinese Journal of Biomedical Engineering(English Edition)》 2013年第1期29-36,共8页
In this study, the polyacrylate intraocularr lens is irradiated by argon ion which can produce free radicals. In order to obtain better hydrophilic and lower platelets adhesion, monomer vinyl pyrrolidone (NVP) is graf... In this study, the polyacrylate intraocularr lens is irradiated by argon ion which can produce free radicals. In order to obtain better hydrophilic and lower platelets adhesion, monomer vinyl pyrrolidone (NVP) is grafted onto the hydrophobic polyacrylate intraocular lens surface in a certain reaction conditions. Specific changes in intraocular lens are detected by static contact angle (CA), scanning electron microscope (SEM) and light transmittance. The results show that this surface modification can greatly improve its hydrophilic character and surface formation. 展开更多
关键词 hydrophobic polyacrylate intraocular lens vinyl pyrrolidone argon ion irradiation graft surface modification
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Absorption modification by laser irradiation in DKDP crystals
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作者 Xiaocong Peng Yuanan Zhao +3 位作者 Yuehang Wang Guohang Hu Liujiang Yang Jianda Shao 《Chinese Optics Letters》 SCIE EI CAS CSCD 2018年第5期66-69,共4页
Laser-induced modification at 355 nm of deuterated potassium dihydrogen phosphate(DKDP) crystals following exposure to nanosecond(ns) and sub-ns laser irradiation is investigated in order to probe the absorption m... Laser-induced modification at 355 nm of deuterated potassium dihydrogen phosphate(DKDP) crystals following exposure to nanosecond(ns) and sub-ns laser irradiation is investigated in order to probe the absorption mechanism in damage initiation. Laser damage resistance is greatly improved by sub-ns laser conditioning,whereas only a little improvement occurred after ns laser conditioning at the same laser fluence. Moreover, scattering and transmittance variations after the two types of laser conditioning indicate similar reduction of linear absorption. However, by contrast, large differences on nonlinear absorption modification are discovered using Z-scan measurement. This characteristic absorption modification by laser irradiation provides evidence that a nonlinear absorption mechanism plays a key role in damage initiation at 355 nm. 展开更多
关键词 Absorption modification by laser irradiation in DKDP crystals
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PREPARATION OF MDPE-g-MAH COPOLYMERS AND THEIR EFFECT ON PROPERTIES OF MDPE/CaCO_3 SYSTEMS
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作者 Guo-dong Zhao Xiao-bo Liu +5 位作者 Guang-nan Qiu Jian-ming Xu Shi-ping Xie Xian-feng Liu Jian-song Yang Lan-hang Xu 《Chinese Journal of Polymer Science》 SCIE CAS CSCD 2013年第9期1271-1275,共5页
MDPE-g-MAH copolymers were prepared with MDPE (medium density polyethylene) and MAH (maleic anhydride) under different irradiation doses of high-energy electron accelerator, and FTIR spectra confirmed their struct... MDPE-g-MAH copolymers were prepared with MDPE (medium density polyethylene) and MAH (maleic anhydride) under different irradiation doses of high-energy electron accelerator, and FTIR spectra confirmed their structure. The effect of the different contents of MDPE-g-MAH copolymers on properties of MDPE/CaCO3 system is studied intensively. By adding 4 Phr (parts per hundred of resin) MDPE-g-MAH in MDPE/CaCO3 system under irradiation dose of 0.7 MGy, the tensile strength increases from 16.3 MPa to 19.9 MPa, and elongation at break increases from 437% to 518%. SEM images show the domain size of CaCO3 in MDPE-g-MAH systems becomes small. Definitely, MDPE-g-MAH copolymer could improve the compatibility of MDPE/CaCO3 system effectively. 展开更多
关键词 MDPE-g-MAH copolymer MDPE CaCO3 irradiation modification Compatibility.
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