首页 | 本学科首页   官方微博 | 高级检索  
相似文献
 共查询到20条相似文献,搜索用时 78 毫秒
1.
织物直接涂层用高耐水压聚氨酯涂层剂   总被引:2,自引:0,他引:2  
宋兆萍 《聚氨酯工业》1996,11(4):20-23,35
研究了织物直接涂层用高耐聚氨酯涂层剂的配方及制备工艺。讨论了MDI含量、聚醚/聚酯比率、扩链剂以氨酯涂层剂皮膜物理性能的么及聚氨酯涂层剂结构、涂层加工地涂层强俄耐水性能的影响。  相似文献   

2.
功能性有机硅涂层材料   总被引:5,自引:2,他引:5  
王生杰  佀庆法  范晓东 《涂料工业》2005,35(6):48-54,63
综述了有机硅材料作为自洁防污涂层、耐高温涂层、高耐磨涂层、石刻保护涂层、耐腐蚀涂层、绝缘涂层等方面的研究及应用现状,并展望了其发展前景。  相似文献   

3.
太阳能吸热涂层的研究现状   总被引:5,自引:0,他引:5  
综述了我国近年来太阳能吸热涂层的研究现状,包括非选择性涂层和选择涂层两大类,其中选择性涂层又可分为电镀涂层,阳极化涂层,真空镀膜涂层和选择性涂料层。,  相似文献   

4.
干法涂层技术简介汤锡铨(昆山纺织机械厂215300)涂层整理加工是将高分子聚合物涂施于基质材料上使纺织品、无纺布、针织物、纸张、地毯及其它材料成为具有独特或综合性能的复合材料。纺织涂层整理可使织物改变外观,改变风格,增加各种功能,是提高纺织产品附加值...  相似文献   

5.
涂层织物的开发及应用   总被引:6,自引:0,他引:6  
叙述了涂层织物的加工方法和涂层方式,介绍了用于涂层织物上的几种涂层剂,重点讨论了涂层织物的开发及应用。  相似文献   

6.
涂层硬质合金结构及材料的研究进展   总被引:1,自引:0,他引:1  
涂层硬质合金具有高硬度和优良的耐磨性,延长了其制品的使用寿命.本文主要从材料学角度,综述了涂层结构类型、涂层材料及结构、涂层基体等方面国内外涂层硬质合金的研究进展,联系具体涂镀技术和工艺,对比和讨论了不同类型涂层的物理性能、机械性能和切削性能,并对涂层硬质合金行业的发展进行了展望.  相似文献   

7.
简述了无取向电工钢的表面涂层,并且分别就有机涂层、无机涂层和半无机涂层的应用研究进展作了介绍,着重说明了无铬环保型半无机涂层的特点和应用前景。  相似文献   

8.
橡胶制品防老化涂层的研究与应用   总被引:3,自引:0,他引:3  
采用良好的涂层涂覆在橡胶制品外表上,不仅可以增加美观,丽且是一种简便有效的防老化措施。本文介绍了橡胶制品防老化涂层的研究和应用情况,推荐了具有实用价值的氯丁橡胶改性涂层和氯磺化聚乙烯橡胶涂层。这两种防老化涂层已经推广应用于实际制品中,并获得良好的防老化效果。  相似文献   

9.
10.
11.
方利国 《广州化工》2014,(19):190-192
教学相长既是教学理念,又是教学方法,它是古人对教学和认知的一种哲学思想。通过目前对教学相长认识现状的分析,结合课程教学,构建了课程教学中的教学相长模型。该模型包含5种形式的教学相长模式,囊括了目前人们对教学相长的所有认识。通过具体的教学实践,阐述了5种教学相长模式的具体应用,证明了这5种模式在课程教学中的有效性,为教学相长在新时期的应用提供了实践和理论依据。  相似文献   

12.
陈雨前 《陶瓷学报》2007,28(4):308-315
宋代景德镇青白瓷具有"白如玉、明如镜、薄如纸、声如磬"的特点,而宋代的政治方针、哲学思想、宗教思想、文人审美和书画意趣等多方面的综合影响,正是形成宋代景德镇青白瓷审美风格的深层次原因。  相似文献   

13.
张虹  罗莹  崔朋蕾  杨军 《化工进展》2020,39(5):1803-1811
室温离子液体(ionic liquids, ILs)作为一种新型的绿色环保溶剂,由于其特殊的功能化结构及热稳定性好、挥发度低和溶解能力强等特点,目前被广泛应用于纳米材料的制备领域。本文重点介绍了离子液体在纳米材料制备中的应用及相关研究的最新进展,结合一些示例对本领域进行了概述,其中包括离子液体作为溶剂,例如作为反应介质和稳定剂;模板剂,例如利用离子液体的微结构(胶束和囊泡、液晶凝胶、乳液和微乳液)作为纳米材料合成中的模板和软模板;反应物,例如作为反应中的还原剂和反应组分;以及离子液体微乳液在纳米材料制备中的特殊用法进行了总结,并讨论了离子液体在快速发展的纳米材料制备领域中的存在挑战和机遇。  相似文献   

14.
生物质基合成气的净化   总被引:5,自引:2,他引:3  
在阐述生物质能源利用的技术基础上,提出了一条全新的用于生物质基燃气净化的工艺路线,即采用旋风分离器加单管式过滤器除尘,催化分解法脱氨,NC2301脱氯剂脱氯,干法氧化铁粗脱硫加氧化锌精脱硫脱除硫化氢,干法氧化锰脱除SO2,3093脱氧的工艺组合方式。  相似文献   

15.
本文研究了在以苯胺绿为模板分子,α-甲基丙烯酸( MMA)和2-乙烯基吡啶为功能单体,乙二醇二甲基丙烯酸酯( EGDMA)为交联剂,偶氮二异丁腈为引发剂,乙腈和四氧呋喃为溶剂分别在热引发和光引发的条件下合成以孔雀石绿为模板分子的印迹聚合物的实验过程中,通过选择不同配比的反应物,分析了各种合成条件对印迹聚合物识别能力的影...  相似文献   

16.
邻硝基苯甲醛合成方法研究进展   总被引:1,自引:1,他引:0  
综述了近年来国内外有关邻硝基苯甲醛化学合成方法的研究进展和成果。重点阐述了以邻硝基苄醇、邻硝基甲苯和其它化合物为起始原料,以过氧化物、铬酐、高锰酸钾和氧气/空气等为氧化剂的合成方法。其中,以邻硝基甲苯为原料、金属卟啉为催化剂、氧气/空气为氧化剂的合成方法具有反应条件温和、氧化剂清洁且廉价易得、操作简单、环境友好等优点,具有广阔的应用前景。  相似文献   

17.
Mast cells are involved in allergic and other inflammatory diseases. The polyphenol resveratrol is known for its anti-inflammatory properties and may be used as nutraceutical in mast cell associated diseases. We analyzed the effect of resveratrol on mast cells in vivo in ovalbumin-induced allergic enteritis as well as experimental colitis in IL-10−/− mice which received resveratrol via drinking water. Treatment with resveratrol prevented the increase in mast cells in both allergic enteritis and chronic colitis in duodenum as well as in colon. Further, it delayed the onset of diseases symptoms and ameliorated diseases associated parameters such as tissue damage as well as inflammatory cell infiltration in affected colon sections. In addition to the findings in vivo, resveratrol inhibited IgE-dependent degranulation and expression of pro-inflammatory cytokines such as TNF-α in IgE/DNP-activated as well as in LPS-activated bone marrow-derived mast cells. These results indicate that resveratrol may be considered as an anti-allergic and anti-inflammatory plant-derived component for the prevention or treatment of mast cell-associated disorders of the gastrointestinal tract.  相似文献   

18.
一种新型镁合金脱漆剂的研制   总被引:1,自引:0,他引:1  
以苯甲醇为主溶剂,乙烯基乙醚为助溶剂,三乙醇胺为活化剂,十二烷基苯磺酸钠为表面活性剂,添加剂A为缓蚀剂,石蜡为阻挥发剂,甲基纤维素为增稠剂,制备了一种镁合金基体的新型低毒,低腐蚀性的脱漆剂.分别研究了主、助溶剂配比,活化剂、表面活性剂及增稠剂质量分数对脱漆剂脱漆时间的影响,同时研究了缓蚀剂对脱漆效果影响.结果表明,当w...  相似文献   

19.
Compression of soldered and conductive adhesive joints resulted in both reversible and irreversible changes in the contact electrical resistivity. At a low stress (as low as 0.02 and 0.005 MPa for soldered and adhesive joints, respectively), the resistivity increased with almost complete reversibility as the compressive stress increased. At an intermediate stress (as low as 0.03 MPa) for both soldered and adhesive joints, the resistivity decreased with partial or complete reversibility as the stress increased. At a high stress (as high as 0.21 MPa) for the soldered joint only, the resistivity increased slightly with increasing stress. The resistivity of the soldered joint at no load increased irreversibly and gradually as stress cycling progressed, even at the lowest stress amplitude of 0.12 MPa. However, the resistivity of the adhesive joint at no load decreased irreversibly and gradually as stress cycling progressed, even at the lowest stress amplitude of 0.009 MPa.  相似文献   

20.
Bending strength of 5 vol.% Ni/Al2O3 composites as a function of testing temperature is investigated at temperatures ranging from room temperature to 1200°C. Self‐healing performance at high temperatures of the composites is evaluated by conducting high‐temperature bending tests for as‐sintered, as‐cracked, and as‐healed specimens. Bending strength of as‐sintered specimens dramatically decreases from 995 MPa at room temperature to 205 MPa at 1200°C. Additionally, the plastic deformation of the as‐sintered specimens occurs when the testing temperature reaches to 1200°C. The values of high‐temperature bending strength of as‐healed specimens are comparable with those of as‐sintered specimens. Similar to that of as‐sintered specimens, bending strength of as‐healed specimens degrades when the testing temperature increases. Results of the present study indicate that the recovery of bending strength by the self‐healing function is able to achieve at temperatures as high as 1200°C. Unlike the mechanical behaviors at high temperatures of as‐sintered and as‐healed specimens, the bending strength of as‐cracked specimens slightly increases with the increase of testing temperature. This phenomenon is attributed to the effect of the self‐healing mechanism during high‐temperature bending tests.  相似文献   

设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号