Ekono1/G/MoS2/POM复合材料的磨损机理研究

用转矩流变仪共混一模压成型方法制备了Ekonol／G／MoS，／POM复合材料，通过环块磨损试验机对材料的耐磨性能进行了测试，并用SEM对磨损表面进行了观察和分析，在此基础上探讨了复合材料的磨损机理。结果表明：与POM相比，复合材料具有优良的耐磨性能；随着Ekonol含量的增加。复合材料的磨损机理发生了由犁沟、粘着磨损向疲劳磨损、磨粒磨损的转变。     

纳米TiO_(2)改性玻璃纤维织物复合材料的摩擦磨损性能研究

文章采用MM-2000微机控制摩擦磨损试验机对纳米TiO_(2)改性玻璃纤维织物复合材料进行了摩擦磨损性能测试,采用FE-1050系列纳克微束高分辨场发射扫描电子显微镜对样品材料表面特性和表征进行观察和分析,同时分析纳米TiO_(2)含量对复合材料摩擦性能影响。最终结果表明,实验中滑动速度、荷载、温度以及纳米TiO_(2)的含量都会对复合材料摩擦磨损性能产影响,纳米TiO_(2)的加入可以很好的将玻璃纤维表面的应力集中,使得复合材料的摩擦磨损性能得到提高,其中,当纳米TiO_(2)添加含量为2%时,复合材料的抗磨性能最好。     

分层接结三维机织预制体增强酚醛树脂基材料的摩擦性能

为克服短切纤维和二维碳布增强预制体结构强度低的缺点,分别设计并制备了浅交弯联和深交联2种分层接结三维机织碳纤维预制体增强酚醛树脂基复合材料,并以相同复合工艺制备了短切碳纤维增强酚醛树脂基复合材料。测试碳纤维/酚醛树脂复合材料的摩擦性能,并通过观察3种复合材料的磨损表面和磨屑的微观形貌,探讨了其摩擦机制。结果表明:短切纤维复合材料的摩擦因数和磨损率最高,深交联的摩擦因数和磨损率最低,浅交弯联的居中。分层接结三维机织结构预制体具有优良的力学性能和整体性,会使复合材料在摩擦过程中减少磨屑与磨损,保持稳定的摩擦因数,从而使复合材料具有良好的摩擦性能。     

无机填料/木粉/R-PE的复合材料热膨胀性能与弯曲性能的研究

以回收的聚乙烯(R-PE)为基体,松木纤维(WF)为有机增强填料,轻质碳酸钙(PCC)、双飞粉(Fly ash)和二氧化硅(Si O2)为无机填料,MAPE为偶联剂采用注塑法制备复合材料,以机械性能为基础研究了复合材料的热膨胀性能。结果表明:当无机填料的添加量从0到25%时,随着无机填料的加入,较纯的R-PE,T-Fly ash/WF/R-PE,T-Si O2/WF/R-PE和T-PCC/WF/R-PE复合材料的弯曲强度和弯曲模量随着无机填料的增加而增加,热膨胀系数与无机填料的加入量成反比。     

纳米复合材料的制造及其在纺织品上的应用

纳米复合材料是一种在三维空间中至少有一维处于纳米尺度范围(<100nm)的材料。在聚合物基体中适当加入纳米粒子,可显著提高其性能。通过这种方法获得的材料就可称作为某种纳米填料的高分子复合材料。通过控制加入复合材料中的纳米粒子的结构,就可以得到具有新的物理机械性能和未填充材料所不具备的特性的材料,如阻燃性、加速生物降解性等。     

氨基化石墨烯/壳聚糖复合皮革涂饰剂的制备与性能

利用γ-氨丙基三乙氧基硅烷对氧化石墨烯进行改性,制备了氨基化石墨烯,并通过红外光谱表征其基本结构;然后以壳聚糖为基质,氨基化石墨烯为填料,戊二醛为交联剂通过溶液共混法制备了复合皮革涂饰剂。研究结果表明,氨基化石墨烯/壳聚糖复合材料最佳的制备工艺为:当pH值为3时,在40℃下反应4 h所得复合材料性能最佳,其粒径为3250 nm,粒径分布系数为0.253。氨基化石墨烯/壳聚糖复合涂饰剂可提高成品革物理机械性能和抗菌性能,对肺炎克雷伯氏菌、金黄色葡萄球菌、白色念珠菌抑菌率≥99.9%。     

交联对硅烷偶联剂改性TiO_2/聚丙烯酸复鞣剂性能的影响

光催化材料TiO_2因具有降解甲醛等有机物的特性而受到广泛研究。采用球磨法制备了柠檬酸、乙醛酸、三乙烯四胺化学交联硅烷偶联剂改性TiO_2/聚丙烯酸复合材料。结果表明,交联可有效改善复合材料的综合性能,乙醛酸可提升分散性,三乙烯四胺可提升稳定性和甲醛清除性能,其中三乙烯四胺的甲醛清除率可达94.63%。交联硅烷偶联剂改性TiO_2/聚丙烯酸复合材料还可提升成品革物理机械性能和降低甲醛含量,物理机械性能可提升5%～10%,成品革中甲醛含量可降低至16 ppm以下。     

纸基摩擦材料的磨损机理分析

通过对纸基摩擦材料的磨损表面及其热衰退性能进行分析,初步探讨了纸基摩擦材料的磨损机理。研究表明,在剪切力及压力的反复作用下,摩擦材料表面的纤维发生严重的磨损,并产生磨屑;其中,植物纤维的磨损更为严重。磨损表面产生严重的界面分离,甚至发生纤维的脱落。磨损时所产生的纤维磨屑及填料磨粒镶嵌于植物纤维中或陷于材料的孔隙中,不会对材料的磨损性能造成明显影响。热分析表明,磨损使得热性能较差的植物纤维发生显著的热衰退,材料的热性能下降。这些结果表明,纸基摩擦材料的磨损机理主要为黏着磨损和疲劳磨损。     

聚苯酯填充聚四氟乙烯复合材料的导热及摩擦学性能研究

采用聚苯酯对PTFE进行改性,并对改性后复合材料的导热及摩擦学性能进行研究.结果表明：当m（聚苯酯）∶m（PTFE）=5∶100时,复合材料的热扩散系数可达2.646 mm2/s,导热性能有显著提高,材料的耐磨性能提高了20倍,有效改善了材料的摩擦学性能.     

PA/PET高强导热复合材料

由于成本相对低廉,金属氧化物填充聚合物一直是制备导热聚合物复合材料方法之一。主要研制导热聚对苯二甲酸乙二醇酯聚酰胺复合材(PET/PA),选用氧化铝为导热填料,首先探讨基体树脂配比PET/PA对PET/PA/氧化铝复合材料导热和力学性能的影响,结果表明PET/PA配比为1∶4时效果最好;然后固定基体树脂配比为1∶4,考察氧化铝含量和粒径对PET/PA/氧化铝复合体系的导热性能和力学性能的影响。40wt%Al2O3填充量下,综合性能最好。导热性能和力学性能随氧化铝粒径增加而改善。通过对偶联剂的研究表明钛酸酯偶联剂效果最好,偶联剂处理显著改善了氧化铝粉体在PA6基质中分散性。二步法和一步法的对比表明二步法可以有效控制填料在不同基体相中的分布,有助于调节复合物的性能。     

Review of techniques to manufacture micro-hydrogel particles for the food industry and their applications

Microgels are ‘soft’ microscopic cross-linked polymeric particles that are being increasingly exploited in a variety of industries for rheology control, encapsulation and targeted delivery. They are valued because of the ability to tune their functionality to address specific applications in oil recovery, coatings, drug delivery, cosmetics, personal care and foods. Food microgels are typically biopolymer hydrogels in the form of microspheres, nanospheres (also called nanogels), spheroids and fibres. The utilisation of engineered microgels in foods has so far been limited, despite their great potential to address several needs in the food industry, including: satiety control, encapsulation of phytonutrients and prebiotics, texture control for healthier food formulations (e.g. reduced fat products), and targeting delivery to specific areas in the digestive tract. We review the scientific and patent literature on the utilisation and manufacturing methods for producing microgels with an emphasis on micro-hydrogels for food applications.     

12—A CRITIQUE OF SOME HYPOTHESES RELATING TO THE HETEROGENEITY OF THE HIGH-SULPHUR PROTEINS OF WOOL

Joubert and Burns prepared a large number of fractions from the high-sulphur proteins of wool and estimated their molecular weights and amino-acid compositions. Their data have been re-examined in order to look for statistically significant interrelations between amino acids and between the proportion of various amino acids and molecular weight. Statistical analysis of the data is also used to examine the credibility of some hypotheses concerning the mechanism of keratin biosynthesis and to provide further evidence for the existence of families of proteins within the high-sulphur fractions of wool.     

Announcing a new international peer-reviewed journal:Food Science and Human Wellness now accepting manuscript submission in English

<正>We are pleased to announce the launch of a new international peer-reviewed journal-Food Science and Human Wellness,ISSN 2213-4530,which is an open access journal,produced and hosted by Elsevier B.V.on behalf of Beijing Academy of Food Sciences.Food Science and Human Wellness is an international peer-reviewed English journal that provides a forum for the dissemination of     

The Latest Data about Development of Chinese Printing Industry in 2013

In the 2014 China（Shanghai）International Printing Week,Director Wang Yanbin released the latest data about development of Chinese printing industry in 2013.According to statistics,in 2013,the total output value of Chinese printing industry exceeded 1trillion Yuan for the first time,reaching 1.03985 trillion Yuan.There were 105,000 printing enterprises in China,employees were 3.415 million.The total asset was 1.06247 trillion Yuan;     

The State Council Issued "Directory of Government Approved Investment Projects(2013 Edition)"

正On December 2nd,2013,the State Council issued the notification of"Directory of Government Approved Investment Projects(2013 Edition)"(hereafter referred to as"notification").It is pointed out in the"notification"that in order to further deepen reforms in investment systems and administrative examination and approval systems,simplify administrative procedures and delegate powers to lower levels,earnestly     

Top Ten News of China's Paper Industry 2013

On December 24th, 2013, the meeting on the selection of top 10 news of China＇s paper industry 2013 sponsored by 〈China Paper Newsletters〉 was held in Beijing. The yearly selection of the top l0 news, which began in 2000, has become a brand activity widely recognized in the industry thanks to the support from the authorities at all levels and public participation.     

National Development and Reform Commission Issued Announcement for Selection of Major Preliminary Research Projects for the "13~(th) Five-Year Plan"

In Apri Commi major p Plan＂ （h 2014, the National Development and Reform ssion issued an announcement for selection of reliminary research projects for the ＂13th Five-Year ereafter referred to as ＂The Announcement＂）     

Announcing a new international peer-reviewed journal:Food Science and Human Wellness now accepting manuscript submission in English

<正>We are pleased to announce the launch of a new international peer-reviewed journal-Food Science and Human Wellness,ISSN 2213-4530,which is an open access journal,produced and hosted by Elsevier B.V.on behalf of Beijing Academy of Food Sciences.Food Science and Human Wellness is an international peer-reviewed English journal that provides a forum for the dissemination of the latest scientific     

China textile machinery: taking off in progress

正Among the 1600 exhibitors who take apart in the ITMA ASIA+CITME2014 2/3 are Chinese manufactures.If the numerous figures failed to attract your attention,the increase of quality should draw your focus.To adopt the demand of developing textile machine market,domestic textile machinery enterprises now follow the slogan of"technology drives development"to enhance product competitiveness.Our domestic sellers will showcase product ranging from spinning,weaving,dyeing and printing,     

Anti-mutagenic compounds from corn

In previous studies with aflatoxin-contaminated corn an uncharacteristic response for AFB₁ in the Salmonella/microsomal mutagenicity assay (Ames test) was observed and the presence of anti-aflatoxin factors in the corn was suggested. In the current study, corn was extracted and fractionated using thin layer chromatography (TLC) using different developing solvent systems and the Ames test was used to monitor for anti-mutagenic activity in the corn fractions. Both Salmonella tester strains TA98 and TA100 with metabolic activation (S9) were used. Several corn fractions, at different stages in the isolation and purification process, showed anti-mutagenic dose-responses when exposed to pure AFB₁. Corn extracts were non-toxic to the tester strains and TLC fractions that showed the best anti-mutagenic dose-responses were selected for further partial characterization analyses.