造纸用聚乙烯醇纤维专利技术现状与发展趋势

概述了聚乙烯醇纤维在造纸领域的应用状况,在检索分析了大量国内外专利文献的基础上,对国内外涉及聚乙烯醇纤维的相关专利情况进行了对比研究,特别是对相互竞争对手的核心专利进行了分析,并就聚乙烯醇纤维在造纸领域应用中的专利布局及专利战略提供了建议。     

造纸用碳纤维专利技术现状与发展趋势

概述了碳纤维在造纸领域的应用状况,并在检索分析大量国内外专利文献的基础上,对国内外涉及碳纤维纸的相关专利情况进行了对比和分析,同时就碳纤维在造纸领域应用中的专利布局及专利战略提出了建议。     

全球布局芳纶纤维专利

<正>全球芳纶纤维的主要申请人是日本帝人和美国杜邦,无论是生产工艺还是具体应用,他们都占绝对优势作为高性能纤维的重要品种,芳纶纤维是攸关国民经济和国防事业发展的战略性材料之一。我国虽然在芳纶纤维的研发上有了一系列的突破并实现了产业化生产,但美国和日本的企业仍然占据主导地位,如美国杜邦公司的对位芳纶Kevlar纤维多年来闻名世界。杜邦公司作为芳纶纤维的发明者和该领域的领导者,在进行专利保护时,不仅仅只着眼于发明点本身的保护,而是将保护主题延伸,在产品、工艺和应用方面均有一系列的专利保     

芳纶专利破壁

国内芳纶企业在试图跨越国外行业龙头技术、市场壁垒的同时,通过专利布局有效保护自身创新技术非常重要芳纶纤维、碳纤维与超高分子量聚乙烯纤维并称为三大高性能纤维,在国防军工和民用领域都有广泛的应用,是强国强军的战略性物资。美国杜邦(DuPont)公司在芳纶领域不仅具有技术和市场上的先发优势,而且善于利用专利资源巩固强化自身优势,不断扩展产业链,挤压弱小企业生存空间。多年来,我国芳纶企业夹缝中求生,亟需破壁。本文希望通过剖析杜邦的专利布局之道,为我国芳纶企业的发展提供建议。     

芳纶纳米纤维气凝胶的研究进展

为推动芳纶纳米纤维气凝胶从实验室走向实际应用,系统介绍了芳纶纳米纤维气凝胶国内外研究现状。首先分析了气凝胶领域面临的主要困难,阐述了芳纶纳米纤维气凝胶开发的重要意义;随后介绍了构筑单元芳纶纳米纤维的制备方法及其流变学行为,为后续芳纶气凝胶材料的制备提供参考;最后重点综述了芳纶气凝胶纤维、芳纶气凝胶薄膜以及3D打印芳纶气凝胶的制备、性能及应用等研究现状,总结了制备过程中一系列新型溶胶-凝胶转变原理,概述了芳纶气凝胶材料性能提升的策略以及在热管理、智能防护和分离过滤等新兴领域中的应用前景。分析认为,芳纶纳米纤维气凝胶发展仍处于初期阶段,优化芳纶纳米纤维气凝胶制备技术、进一步提升其性能仍将是研究的热点与重点。     

基于芳纶纳米纤维的芳纶纳米纸结构与性能研究进展

芳纶纳米纤维和芳纶纳米纸作为近年来开发的新型先进纳米材料,其应用研究已成为国内外高分子纳米纤维领域的研究热点与发展趋势之一。本文对比分析了基于芳纶纳米纤维的芳纶纳米纸与传统芳纶纸在制备方法、纸张结构、光学性能、机械性能、耐温性以及绝缘性能方面的差别,探讨了芳纶纳米纸在大规模、低成本制备及应用可能存在的问题,指出了芳纶纳米纸未来发展面临的挑战与展望。     

特种芳纶纤维在造纸中的应用

介绍了芳纶1414、1313的结构与性能;介绍了芳纶纤维在造纸中的应用情况。     

间位与对位芳纶纤维造纸性能比较

本文介绍了芳纶1313和芳纶1414短纤维及浆粕纤维的纤维形态,并对比论述了芳纶纤维在造纸过程中的行为和性能.     

芳纶纳米纤维及其复合材料研究进展

综述了近年来芳纶纳米纤维的制备方法和国内外研究进展,重点阐述了碱/二甲基亚砜化学裂解法制备芳纶纳米纤维的原理和应用优势;归纳了芳纶纳米纤维在高强高韧材料、过滤材料、透明材料、电池材料、电磁屏蔽材料、隔热材料和电加热材料方面应用的研究进展,并对芳纶纳米纤维未来的研究方向进行了探讨和展望。     

对位芳纶纤维结构形态及造纸性能

介绍了对位芳纶纤维的分子结构、纤维微观结构和形态,并评述了对位芳纶纤维结构形态对其造纸性能的影响.     

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