微胶囊技术在蓄热调温整理上的研究

利用相变材料和微胶囊技术生产蓄热调温型智能纺织品将在改善人类穿着舒适性方面发挥重要作用。文章简述了微胶囊技术的发展历程,并从调温机理、整理方法、性能评价等方面对蓄热调温整理的研究进行了论述。     

智能调温纤维综述

智能调温纤维是相变材料技术与纤维制造技术相结合开发的一种新型功能性纤维,可随外界环境温度的变化通过相变、吸收或放热来调节温度.从智能调温纤维的调温机理、相变材料的选择、加工方法(中空纤维浸渍法、熔融复合纺丝法、涂层法、微胶囊复合纺丝法)、性能评价以及国内外发展现状等方面进行了综述,并指出了目前智能调温纤维存在的不足之处.     

微胶囊技术在蓄热调温纺织品中的应用

本文简要介绍了微胶囊技术的发展概况 ,叙述了蓄热微胶囊技术在新型智能纺织品———蓄热调温纤维、织物和泡沫方面的应用。蓄热调温纺织品将对改善人类的穿着舒适性产生一定的影响     

相变调温材料在纺织领域中的发展及应用

介绍相变调温材料的国内外发展情况、分类和生产方法及在纺织领域的应用。其中相变调温材料分固-气型、液-气型、固-液型和固-固型四类,常用生产方法为纺丝法、相变材料微胶囊法、中空纤维填充法和后整理法四种。相变调温材料在消防服的设计、服装面料设计、医疗纺织品设计都有应用。相变调温纺织材料的生产将更多的应用微胶囊法,微胶囊的小型化及环保性能将是未来的发展方向之一。与此同时,在设计调温纺织品时,与其他生理保健功能的复合化也将是研究的热点。     

智能调温纤维的研究新进展

简述蓄热调温纤维及织物的储热调温机理、相变材料的选择,主要介绍了蓄热保温纤维及织物的加工方法及现状,以及近年来国内外技术较成功的代表产品丝维尔纤维和Outlast空调纤维,并对智能调温纺织品的发展作了展望.     

汽车座椅用调温纺织品的开发

调温纺织品是将相变材料与纤维和纺织品制造技术相结合开发出的一种新型功能性产品。以液体石蜡作为芯材料,合成了直径大约3.0μm的聚脲型相变微胶囊,并用涂层方法制备了汽车座椅用相变调温纺织品。测试了微胶囊的形貌、粒径及粒径分布,探讨了涂层工艺的各影响因素,分析了调温纺织品的物理性能和热性能。     

蓄热调温纤维用DA@PMMA相变微胶囊的制备及表征

基于正十二醇(DA)相变温度(约22℃)处于人体最佳舒适温度18~28℃范围内,采用DA为相变芯材,聚甲基丙烯酸甲酯(PMMA)为包封壁材,通过原位聚合法制备蓄热调温纺织品纤维用DA@PMMA相变微胶囊,并对相变微胶囊的形貌、粒径分布、热性能及抗压性进行表征。结果表明:DA@PMMA相变微胶囊粒径分布集中于1.232μm附近;壁材表面光滑致密;相变温度为18.7~25℃,热焓值为92.3 J/g,芯材包封率为84.7%,且具有较好的抗压性;可用于制备蓄热调温纺织品纤维。     

相变调温纺织品制备方法的研究进展

为明晰制备工艺对调温纺织品性能的影响,综述了相变调温纺织品的2种制备方法:即在中空纤维中填充相变材料或将相变材料加入纺丝液制备相变纤维,再经织造形成相变织物;或者通过直接填充、表面整理、表面接枝改性等直接复合方式获得相变织物.分析认为:中空纤维填充法对选用的纤维材料要求较高;直接填充法工艺简单、操作方便,但会使纺织品舒...     

聚氨酯/相变蜡蓄热调温功能整理剂的制备及其在棉织物上的应用

针对传统相变微胶囊后整理法制备蓄热调温纺织品时存在制备工序繁杂、效率低等难点,开发了一种简便快捷的后整理法。选用相变蜡、聚氧乙烯辛基苯酚醚-10(OP-10)乳化剂和水性聚氨酯为主要组分,经高剪切乳化制备蓄热调温功能整理剂,利用浸轧—焙烘方式对棉织物进行整理。优化乳化剂用量、相变蜡与聚氨酯配比及焙烘温度,并测定整理后棉织物及背心的蓄热调温性能。结果表明:当OP-10质量分数为5%,相变蜡与聚氨酯的质量比为1.5∶1,焙烘温度150 ℃时,整理剂在纤维表面原位成膜形成包裹纤维的蓄热调温薄膜,从而赋予棉织物蓄热调温功能;整理后棉织物具备蓄热调温功能,由其所制作的背心具有显著的蓄热调温功能。     

蓄热调温纺织品的研究与发展

蓄热调温纺织品是一种具有双向调温功能的新型智能纺织材料。论述了蓄热调温纺织品的调温机理、制造方法及应用,并对蓄热调温纺织品的市场前景进行了展望。     

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.     

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     

INFOPRINT 2014 was Successfully Held in Dongguan

Sponsored by Printing and Printing Equipment Industries Association of China （PEIAC） and organized by Print China magazine, the Seventeenth Beijing International Printing Information Conference （INFOPRINT 2014） was successfully held on 11th Dec. 2014 at Dongguan Exhibition International Hotel.