填充助染型丙烯酸树脂复鞣剂Z-1的应用研究

介绍了一种新型丙烯酸树脂复鞣剂Z-1的结构及在皮革复鞣中的应用性能。Z-1为几种活性单体在水溶液中聚合而成的具有长支链结构、多功能基团的树脂复鞣剂。应用结果表明，复鞣剂Z-1对皮革具有选择填充性能，同时具有良好的匀染性能。     

超支化聚合物皮革复鞣填充剂的制备及应用

以马来酸单酯(TMPM)和甲基丙烯酸(MAA)为原料,过硫酸铵为引发剂,采用自由基共聚法制备超支化聚合物皮革复鞣填充剂(HPM)。通过正交试验考察了支化单体类型、引发剂用量、单体配比和反应温度对TMPM双键转化率的影响。结果显示:以TMPM-20为支化单体,n(TMPM):n(MAA)=1:18,w(APS)=6%,聚合物温度为82℃,聚合时间为2.5h时,采用单体滴加的方式,单体转化率较高。应用结果表明:HPM具有优异的复鞣和填充性能,可赋予皮革丰满、柔软的手感,对皮革染色性能负面影响小,综合应用性能优于BaytiganAR和ART-Ⅱ。     

DRA两性复鞣剂的复鞣效果

采用阳性单体和阴性单体经水溶液聚合制得两性复鞣剂DRA,探讨了DRA两性复鞣剂的应用工艺条件。结果表明。DRA两性复鞣剂用于皮革的复鞣,在保持阴离子型丙烯酸树脂复鞣剂原有性能的基础上,有效地解决了皮革染色时的败色现象。     

顺酐—苯乙烯共聚物复鞣剂的改性

本文叙述了顺酐－苯乙烯共聚物及其在皮革复鞣中的应用，讨论了（甲基）丙烯酸类单体同顺酐衍生物共聚制备的阴离子型和两性离子型皮革复鞣剂的合成工艺及其性能。     

利用废旧皮革胶原多肽制备KFC蛋白复鞣填充剂

详细论述了用丙烯酸和十二醇马来酸单酯对废旧皮革胶原多肽进行接枝改性,研制一种蛋白复鞣填充剂,确定的最优工艺方案如下:胶原多肽∶单体为1∶4~1∶2,软性单体∶丙烯酸≤1∶4,过硫酸钾用量1%~3%,反应温度80~88℃,加料时间1.5~2.0h,保温时间2.0~2.5h。并对该蛋白复鞣填充剂做了应用对比试验,证明该蛋白复鞣填充剂具有优良的填充性和选择填充性。     

填充发泡型乙烯基聚合物复鞣剂的制备及应用研究

在对复鞣剂作用下的皮革填充发泡机理进行分析的基础上，以甲基丙烯酸、丙烯酸丁酯及顺丁烯二酸酐为原料，用分子设计的原理合成制备了具有填充发泡性能的用作皮革复鞣剂的乙烯基聚合物，对聚合物复鞣剂的玻璃化转变温度及相对分子质量用示差扫描量热仪(DSC)及凝胶渗色谱仪(GPC)进行了表征，研究了乙烯基聚合物鞣剂的相对分子质量对其表面活性及在皮革中的渗透性、填充发泡性能的影响，用扫描电镜(SEM)对应用革的显微形貌进行了表征，应用结果表明该复鞣剂具有较好的复鞣及填充发泡效果，复鞣革丰满、柔软、弹性好。     

含氟复鞣剂研究进展

含氟复鞣剂可以赋予皮革良好的手感、优异的透气性、抗水抗油性、抗污性等性能。阐述了合成含氟复鞣剂用含氟单体和非氟共聚单体的选择及其合成工艺 ,介绍了含氟复鞣剂的研究进展 ,指出含氟复鞣剂今后将会向着高质量、多功能化方向发展     

高固含量微乳液聚合制备具有增强作用的丙烯酸树脂复鞣剂

采用高固含量微乳液聚合法制备了具有增强作用的丙烯酸树脂复鞣剂 ,并用其对猪二层革进行复鞣试验。结果显示 :交联剂DVB(二乙烯基苯 )和亲水性单体AA(丙烯酸 )的用量 ,对微乳液复鞣剂的性能有较大影响 ,当DVB用量为 1 2 %、AA用量为 1 %时 ,性能最好。在复鞣过程中 ,加入 0 2 %的渗透剂JFC能改善革的粒面性能 ,并且大幅提高革的强度。用 3 %的微乳液复鞣剂复鞣猪二层革 ,能使革的抗张强度提高 74% ,撕裂强度提高 48%。当微乳液复鞣剂的用量为 2 %时 ,革的强度和丰满度有了较大的改善 ,而且革的柔软度、弹性和粒面性能下降不多 ,所以复鞣剂的用量应以 2 %为宜。     

润滑型丙烯酸树脂复鞣剂的研究

以甲基丙烯酸和丙烯酸-2-乙基己酯为原料合成了润滑型丙烯酸树脂复鞣剂,对参与聚合反应的单体配比、乳化剂及引发剂用量进行了系统的研究,确立了最佳合成工艺;利用红外光谱对聚合物鞣剂进行了初步分析,并考察了其应用性能.结果表明,该聚合物具有良好地加脂复鞣性能、低雾性以及一定的防水性,复鞣革粒面细致、丰满性好,适用于防水革、耐水洗革以及低雾性皮革的生产.     

GAP—1皮革复鞣剂通过中试签定

一种适用于服装革、软鞋面革、沙发革等高档软革复鞣的GAP-1新型皮革复鞣剂已由化工部成都有机硅研究中心研制成功并于最近通过了四川省化工厅组织的中试技术签定。该复鞣剂是乙烯类单体与丙烯酸类单体共聚再径适当改性的水溶性树脂,外观为浅综色粘性透明水溶液,粘度为100～500mpa.s(30℃),pH值4.0—5.0,固含量>40％。本产品除具有一般丙烯酸树脂复鞣剂的特点外,其增白效果和耐光性能居国内领先水平,特别适用于生产白色软革和二层绒面革等的复鞣。     

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