有机硅交联剂改性阴离子型氨基硅微乳液的合成与应用

引用自交联的第三组分改性单体有机硅交联剂,采用微乳液聚合法,由D4开环聚合,硅烷偶联剂γ-氨丙基三乙氧基硅烷和有机硅交联剂共聚改性得到半透明的改性有机硅微乳液,对其聚合时的工艺进行了确定.用于涤棉织物整理,对它的应用性能进行了检测.结果表明:该硅微乳液稳定性好,整理织物具有松、柔、滑之手感,织物弹性提高,悬垂性好,是一种新型的织物整理剂.     

新型氨基硅油柔软剂BSO的合成及应用性能

用γ-丁内酯和γ-（2，3-环氧丙氧）丙基三甲氧基硅烷对氨基硅油ASO进行改性，得到新型氨基硅油BSO．介绍了氨基硅油柔软剂BSO的合成方法，并比较了两种氨基硅油制备的微乳液织物整理剂在应用过程中的柔软性、泛黄程度、亲水性、与阴离子型荧光增白剂的相容性、耐电解质性、耐碱性和乳液稳定性等基本性能。     

有机氟/纳米ZnO改性聚丙烯酸酯整理剂的合成及应用

用γ-(甲基丙烯酰氧基)丙基三甲氧基硅烷(KH-570)对纳米ZnO接枝改性,然后以改性纳米ZnO、甲基丙烯酸甲酯、丙烯酸乙酯和甲基丙烯酸六氟丁酯为原料,通过半连续种子乳液聚合法制备了有机氟/纳米ZnO聚丙烯酸酯织物整理剂,并将其用于亚麻织物的整理。采用FT-IR对合成的乳胶膜进行结构表征,以TG和XRD对接枝改性的纳米ZnO样品进行分析。结果表明:KH-570成功改性了纳米ZnO,提高了纳米ZnO的分散性;制备的共聚乳液呈半透明泛强蓝光。用其整理亚麻织物,织物表面变得光滑,对水的接触角为134.52°,具有疏水性能和抗污性能,优异的抑菌性,抑菌带宽度约为1.7 mm,经向和纬向断裂强力分别提高了152 N和139 N,透气率和透湿率略有下降。     

含氟氨基硅油的制备及其与氨基硅油的应用性能比较

用1,3,5-三(甲基三氟丙基)环三硅氧烷(D3F)与N,N-二甲基-β-氨乙基-γ-氨丙基二甲氧基硅烷(KH-602)等进行开环聚合反应,合成了一种新型织物后整理剂AFSO-1,并对其结构进行了表征.在应用性能上,与N-β-氨乙基-γ-氨丙基聚二甲基硅氧烷(ASO-1)进行了比较,结果表明:AFSO-1整理织物的柔软性不及ASO-1整理的织物,但拒水性、增深性明显提高.     

氨烃基聚甲基三氟丙基硅氧烷的制备及应用

在碱性催化剂作用下,用1,3,5-三(甲基三氟丙基)环三硅氧烷(DF3)与N,N-二甲基-β-氨乙基-γ-氨丙基二甲氧基硅烷(KH-602)进行开环聚合反应,合成了一种织物整理剂N,N-二甲基-β-氨乙基-γ-氨丙基聚甲基三氟丙基硅氧烷(AFSO-1),并用红外光谱、核磁共振氢谱对其结构进行了表征。用脂肪醇聚氧乙烯醚将其乳化后整理纯棉平纹针织布,研究了其应用性能及影响因素。应用结果表明,经其整理过的织物,与空白样相比,柔软性能明显提高,与经N-β-氨乙基-γ-氨丙基聚二甲基硅氧烷(ASO-1)整理过的织物相比,柔软性能略有提高,而拒水性能明显增强。     

有机硅氧烷-丙烯酸酯乳液聚合研究

采用单体后滴加法,用八甲基环四硅氧烷(D4)和γ-甲基丙烯酰氧基丙基三甲氧基硅烷(A-174),对丙烯酸酯乳液进行改性,通过乳液聚合合成有机硅-丙烯酸酯共聚物.对其合成工艺进行了初步探索,通过红外光谱、DSC分析,对产物进行了表征,考察了不同有机硅含量对共聚产物的成膜性能、胶膜拉伸强度、胶膜伸长率的影响.     

改性有机硅防水剂的应用

以八甲基环四硅氧烷(D4)、乙烯基三乙氧基硅烷、长碳链三甲氧基硅烷以及N-β-(氨乙基)-?-氨丙基甲基二甲氧基硅烷为原料合成改性硅油,并乳化为含固量25%的乳液。采用该有机硅防水剂乳液对棉织物进行防水整理,得到优化整理工艺为:乳化剂质量分数3%,乳液p H值5~6,整理剂质量浓度100 g/L,浸渍时间4 min,170℃焙烘3 min。整理织物与水的接触角可达到156.5°,且柔软性增强。     

交联型硅丙共聚乳液的研究

采用γ-甲基丙烯酰氧基丙基三甲氧基硅烷(A-174)对丙烯酸酯乳液进行共聚改性,得到了交联型丙烯酸酯乳液.进行了红外光谱、DSC、粒径及其分布、混合溶剂不溶解率等测试,证实了交联结构的存在.涂膜性能结果表明,A-174极大地提高了丙烯酸酯的硬度、抗冲击性、耐水性、耐溶剂性和抗张强度.     

氨基改性有机硅阴离子微乳液的聚合

以八甲基环四硅氧烷(D4)和N-(β-氨乙基)-γ-氨丙基甲基二甲氧基硅烷(KH-602)为主要原料,十二烷基苯磺酸(DBSA)为催化剂,经乳液聚合得到阴离子型氨基改性有机硅微乳液,探讨了反应温度、催化剂、非离子乳化剂以及偶联剂用量对聚合反应的影响,并初步分析了DBSA催化聚合的机理.结果表明:D4转化率随反应温度的升...     

单、双、三胺型改性聚硅氧烷的制备及应用性能

将线形硅油分别与γ-氨丙基甲基二甲氧基硅烷、N-β-（氨乙基）-γ-氨丙基甲基二甲氧基硅烷、γ-二乙烯三氨丙基甲基二甲氧基硅烷反应,利用碱催化缩聚法制备了单、双、三胺型改性聚硅氧烷。通过FT-IR对产物结构进行了表征,并研究了其应用性能,结果表明：双胺型聚硅氧烷整理后的织物在柔软度、抗折皱、断裂强度等方面性能更为优越。     

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