纳米氧化锌的分散及纳米整理剂的制备

研究了纳米氧化锌在水中的稳定分散介质及纳米整理剂的制备和应用。结果表明，对纳米氧化锌进行适当改性和乳化分散，有利于提高纳米水分散液的稳定性，自制水溶性聚氨酯起到良好的助分散作用；自制的纳米整理剂中纳米平均粒径97．01nm；纳米粒子为单核和多核的微囊式结构；纳米整理剂在纤维上呈非均匀浆膜分布；经纳米整理剂（含纳米ZnO10％）整理的纯棉织物，在10次水洗后的UPF等级达到50＋。     

纳米氧化锌在水中的分散行为及其应用

研究纳米ZnO在水中的分散行为，重点讨论了pH值、分散剂种类及其用量对体系稳定性的影响。采用Zeta电位、沉降沉实验和粒度分析等测试手段，对纳米ZnO微乳液的性状进行表征。结果表明，pH值为10时，添加A类分散剂，微乳液中的ZnO粒径在100nm以下的颗粒体积，超过了颗粒总体积的93％。以此微乳液对涤棉织物进行抗紫外线整理，整理后织物对紫外线的屏蔽率达到99．4％以上。     

染苑精粹

正染色涤纶织物SiO_2包覆ZnO纳米颗粒耐光褪色整理2017041ZnO纳米颗粒具有优异的紫外线吸收性能,但其强光催化活性限制了其在UV防护中的应用。试验尝试在ZnO纳米颗粒表面包覆一层SiO_2,从而在ZnO和涤纶纤维之间形成物理屏障,使ZnO的有害光催化活性对涤纶纤维的影响降到最低,同时发挥其有效屏蔽紫外线的功能。研究了SiO_2包覆ZnO纳米颗粒的结构及其光学     

纳米抗菌材料在抗菌整理中的应用

综述了纳米抗菌整理剂的性能特点,接触性抗菌剂和纳米级TiO2及ZnO的抗菌机理,抗菌整理方法及其整理介质。目前,抗菌整理的方法有纤维改性法和后整理法。其中,后整理法在印染行业应用更为普遍。此外,纳米无机抗菌剂载体以其耐洗涤、多功效特点而越来越受到人们的关注。     

纳米ZnO整理对蚕丝织物抗紫外线性能的影响

为提高蚕丝织物防紫外线性能,采用钛酸酯偶联剂制备纳米ZnO水溶胶,对织物进行防紫外线整理。使用Lambda900紫外分光光度计,测试波长280～400 nm范围的紫外线透过率,以织物的紫外线透过率和UPF值作为其防紫外线性能的评价指标,采用正交试验设计方法,探讨纳米ZnO整理蚕丝织物的最优整理工艺。试验结果表明：纳米ZnO质量浓度对整理后织物的UPF值影响最大,其次是偶联剂质量浓度、超声振荡时间。优化工艺条件为：纳米ZnO质量浓度18 g／L、偶联剂质量浓度12 g／L、超声分散时间20 min。整理前后织物的平均紫外线透过率由27?09％降低到2?46％,UPF值从2?624增加到35?428;纳米ZnO整理织物具有较优的抗紫外线持久性。     

一步法原位生成纳米Ag-ZnO复合整理棉织物

为了实现对纺织品的多功能化整理,本文以棉织物为研究对象,利用端氨基超支化聚合物HBP-NH2通过微波法在织物中一步原位控制生成了纳米Ag-ZnO,研究了整理后棉织物的抗菌和抗紫外性能等。结果表明：HBP-NH2具有多重作用,能够同时与Ag+和Zn2+反应控制生成纳米Ag和纳米ZnO。利用不同浓度整理液整理棉织物,可以获得不同纳米Ag和纳米ZnO含量的棉织物。XRD、XPS和SEM分析表明纳米纳米Ag和纳米ZnO成功整理到棉织物中,粒径为30～120nm。纳米Ag-ZnO复合整理棉织物同时赋予了其优异的抗菌和抗紫外性能,整理后的棉织物对金黄色葡萄球菌和大肠杆菌的抑菌率均达到了99.99%。另外,复合整理还能改善纳米Ag整理对棉织物白度的影响。     

用纳米ZnO改善纯棉热转移印花织物的耐光性

用纳米ZnO改善纯棉印花织物的耐光性．配制了较稳定的纳米ZnO分散液并研究了整理工艺．用它整理的印花织物的耐光性有较明显提高．     

染苑精萃

不同预定形方式对尼龙66染色性能的影响，零排放废弃物工厂，耐久压烫整理棉织物的折皱回复性和评级，自动计量配液设备的近期发展，棉纤维液氨处理和高温水洗后纤维的结构变化，印染废水处理技术研究进展，纳米技术在纺织品上应用的利和弊，纳米抗菌材料在抗菌整理中的应用，纳米级ZnO耐晒后处理添加剂的研究。[编者按]     

纳米ZnO分散液的制备及其在棉织物上的应用

通过对比试验选用聚丙烯酸类阴离子表面活性剂和钛酸酯偶联剂作为联合分散剂对纳米ZnO进行分散处理,使纳米ZnO分散体系稳定性良好,并采用TEM法对分散体系中纳米ZnO微观结构进行了表征。另外,对复合整理前后织物的白度、折皱回复角等性能也进行了测试和比较。研究表明,棉织物经聚丙烯酸钠和钛酸酯偶联剂分散的纳米ZnO溶液整理后,抗紫外线性能显著提高。采用壳聚糖和氨基硅酮作为交联剂,通过复合整理法可使纳米粒子与棉织物牢固结合,抗紫外线性能持久。     

纳米ZnO处理桑蚕丝织物的抗菌抗紫外性能研究

为改善蚕丝纤维的性能,提高真丝制品的附加值,赋予其功能性,采用纳米ZnO分散液(平均粒径为53.16 nm)整理桑蚕丝织物,测试其抗菌性能和抗紫外性能.结果表明:整理后桑蚕丝织物对大肠杆菌抑菌圈直径为8.5 mm,对金黄色葡萄球菌为9.2mm;织物对UVA、UVB的平均透过率分别由34.4%、25.5%(处理前)降低到5.3%、4.3%(处理后),UPF值由6.2提高到24.6.说明经纳米ZnO分散液整理后桑蚕丝织物具有良好的抗菌性能及紫外线屏蔽效果.     

Reliable identification of grapevine rootstock varieties using RAPD PCR on woody samples

Since grapevine ( Vitis spp .) rootstock material is being traded increasingly as disbudded woody material a lack of distinctive morphological features on such material necessitates an alternative and reliable means of identification. Methods described here were developed for rapid and efficient extraction of DNA from woody samples rich in phenolic compounds and polysaccharides, and for subsequent identification of varieties by RAPD PCR. Using these methods, and with the application of only one selected RAPD primer, we were able to differentiate sixteen rootstock varieties, including the seven varieties most commonly used in Germany. Problems commonly encountered with reproducibility of RAPD patterns were avoided by choosing primers with a dinucleotide sequence and a high G/C content that allowed a rather high annealing temperature of 45°C. Methods described here should also be useful for other horticultural crops, especially those with woody tissues rich in phenolic compounds and polysaccharides.     

An internet compendium of analytical methods and spectroscopic information for monomers and additives used in food packaging plastics

An internet website (http://cpf.jrc.it/smt/) has been produced as a means of dissemination of methods of analysis and supporting spectroscopic information on monomers and additives used for food contact materials (principally packaging). The site which is aimed primarily at assisting food control laboratories in the European Union contains analytical information on monomers, starting substances and additives used in the manufacture of plastics materials. A searchable index is provided giving PM and CAS numbers for each of 255 substances. For each substance a data sheet gives regulatory information, chemical structures, physico-chemical information and background information on the use of the substance in particular plastics, and the food packaging applications. For monomers and starting substances (155 compounds) the infra-red and mass spectra are provided, and for additives (100 compounds); additionally proton NMR are available for about 50% of the entries. Where analytical methods have been developed for determining these substances as residual amounts in plastics or as trace amounts in food simulants these methods are also on the website. All information is provided in portable document file (PDF) format which means that high quality copies can be readily printed, using freely available Adobe Acrobat Reader software. The website will in future be maintained and up-dated by the European Commission's Joint Research Centre (JRC) as new substances are authorized for use by the European Commission (DG-ENTR formerly DGIII). Where analytical laboratories (food control or other) require reference substances these can be obtained free-ofcharge from a reference collection housed at the JRC and maintained in conjunction with this website compendium.     

Aroma characterization of various apricot varieties using headspace–solid phase microextraction combined with gas chromatography–mass spectrometry and gas chromatography–olfactometry

The characterization of the aromatic profile of several apricot cultivars with molecular tracers in order to obtain objective data concerning the aromatic quality of this fruit was undertaken using headspace–solid phase microextraction (HS–SPME). Six apricot cultivars were selected according to their organoleptic characteristics: Iranien, Orangered, Goldrich, Hargrand, Rouge du Roussillon and A4025. The aromatic intensity of these varieties measured by HS–SPME–Olfactometry were defined and classified according to the presence and the intensity of grassy, fruity and apricot like notes. In the six varieties, 23 common volatile compounds were identified by HS–SPME–GC–MS. Finally, 10 compounds, ethyl acetate, hexyl acetate, limonene, β-cyclocitral, γ-decalactone, 6-methyl-5-hepten-2-one, linalool, β-ionone, menthone and (E)-hexen-2-al were recognized by HS–SPME–GC–O as responsible of the aromatic notes involved in apricot aroma and considered as molecular tracers of apricot aromatic quality which could be utilized to discriminate apricot varieties.     

Tests of potential functional barriers for laminated multilayer food packages. Part I: Low molecular weight permeants

The advent of the functional barrier concept in food packaging has brought with it a requirement for fast tests of permeation through potential barrier materials. In such tests it would be convenient for both foodstuffs and materials below the functional barrier (sub-barrier materials) to be represented by standard simulants. By means of inverse gas chromatography, liquid paraffin spiked with appropriate permeants was considered as a potential simulant of sub-barrier materials based on polypropylene (PP) or similar polyolefins. Experiments were performed to characterize the kinetics of the permeation of low molecular weight model permeants (octene, toluene and isopropanol) from liquid paraffin, through a surrogate potential functional barrier (25 μm-thick oriented PP) into the food simulants olive oil and 3% (w/v) acetic acid. These permeation results were interpreted in terms of three permeation kinetic models regarding the solubility of a particular model permeant in the post-barrier medium (i.e. the food simulant). The results obtained justify the development and evaluation of liquid sub-barrier simulants that would allow flexible yet rigorous testing of new laminated multilayer packaging materials.     

Analysis of benzo[a]pyrene in spiked fatty foods by second derivative synchronous spectrofluorimetry after microwave-assisted treatment of samples

A simple, rapid and inexpensive method has been developed for the determination of benzo[a     

The development of reference materials for paralytic shellfish poisoning toxins in lyophilized mussel. II: Certification study

This paper describes the second part of a project undertaken to develop certified mussel reference materials for paralytic shellfish poisoning toxins. In the first part two interlaboratory studies were undertaken to investigate the performance of the analytical methodology for several PSP toxins, in particular saxitoxin and decarbamoyl-saxitoxin in lyophilized mussels, and to set criteria for the acceptance of results to be applied during the certification exercise. Fifteen laboratories participated in this certification study and were asked to measure saxitoxin and decarbamoyl-saxitoxin in rehydrated lyophilized mussel material and in a saxitoxin-enriched mussel material. The participants were allowed to use a method of their choice but with an extraction procedure to be strictly followed. The study included extra experiments to verify the detection limits for both saxitoxin and decarbamoyl-saxitoxin. Most participants (13 of 15) were able to meet all the criteria set for the certification study. Results for saxitoxin.2HCl yielded a certified mass fraction of <0.07 mg/kg in the rehydrated lyophilized mussels. Results obtained for decarbamoyl-saxitoxin.2HCl yielded a certified mass fraction of 1.59+/-0.20 mg/kg. The results for saxitoxin.2HCl in enriched blank mussel yielded a certified mass fraction of 0.48 +/- 0.06 mg/kg. These certified reference materials for paralytic shellfish poisoning toxins in lyophilized mussel material are the first available for laboratories to test their method for accuracy and performance.     

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     

Chinese CTP Market

According to Printing and Printing Equipment Industries Association of China（PEIAC）＇s statistics to the plate manufucturer in China, in 2013, the actual offset plate production has reached 346 million square meters in China. Among them, the CTP production volume was 245 million square meters, up by 11% than that of last year; the total sales of the CTP plate was 239 million square meters, up by 13%.     

Preparatory Work of Print China 2015 is Going Smoothly

正Held at Guangdong Modern International Exhibition Center,Print China 2015 will cover 7exhibition halls,besides the original Hall No.3,4,5,6,7,the newly built F zone of Hall 3 will be used too.The total area will be140,000 square meters.Hall 3:Offset and large printing equipment,package printing equipment,post press