基于生物加工的PET功能修饰的进展

PET材料的功能化和高性能化日益受到重视,生物加工是进行聚酯功能化改性及环保处理的一种有效方法。本文综述了用于PET生物加工的两种方式的特性及应用情况,着重介绍了3种不同形态的PET进行生物水解表面改性修饰的过程,以及PET的物理特征、结构和水解产物等对其表面改性修饰能力的影响,最后对聚酯生物加工处理的前景做了展望。     

生物可降解聚酯的技术进展和应用前景

2019年,用于织物、包装和医疗健康领域的生物可降解聚酯达到110万t,市场需求还在高速增长。文章比较全面地综述了该产业链的主要技术,包括原料、催化剂、扩链剂、共混、共聚工业化合成聚酯、检验检测和加工应用技术。认为应根据日常消费、产业应用和高附加值的医疗、健康三大应用领域开发适应不同使用要求、低成本和降解速率可控的产品。产业链技术的重点是原料合成“绿色”化和能源成本的进一步下降;以现有工业化聚酯装置为基础,加快推进研究成果的产业化,完善“生物可降解”检验检测方法和标准、完善建立不同应用领域的产品标准;采用3D打印、超临界发泡等新加工应用技术,开拓聚酯材料的新应用市场。     

高性能非纤聚酯产品的技术与市场新进展

文章概述了全球非纤聚酯的发展和分布情况,并对全球高性能聚酯材料的附加值进行了比较。重点介绍了国内外高性能非纤聚酯材料的产品开发状况,尤其是工程塑料用聚酯的最新技术与市场发展。此外,作者还从高性能聚酯基础材料的改性、新聚酯原料石油资源的综合利用、提高聚酯材料使用性能和生物基资源的应用等几个方面探讨了高性能非纤聚酯产品的开发趋势。     

大豆生物解离制取油脂技术研究进展

从预处理酶解工艺改进、酶解破乳及高值化产品开发等方面对近年大豆生物解离制取油脂技术的国内外研究现状进行阐述,总结了生物解离技术的应用瓶颈问题及发展趋势,以期为创新升级我国大豆生物解离技术提供参考建议,为实现高值大豆产品的生物加工与调控提供理论依据。     

生物基聚对苯二甲酸丙二醇酯纤维制备技术的研究进展

生物基聚对苯二甲酸丙二醇酯纤维的制备技术涉及微生物发酵、发酵产物纯化、聚酯聚合及纺丝加工等多个专业领域。为能给纺织化纤领域研究者提供一个相对全面清晰的视野,以原料到产品的生产流程为主线,从生物基1,3-丙二醇的制备、生物基聚对苯二甲酸丙二醇酯的合成以及其纺丝加工3个方面,对生物基聚对苯二甲酸丙二醇酯纤维制备技术的相关研究进展进行了系统的梳理与剖析。在此基础上,提出了此技术领域未来发展的热点方向,包括生物基原料低成本纯化及含杂聚合、纤维高品质差别化开发、生物基对苯二甲酸的制备以及产品环境足迹评价体系的建立。     

Avantium:新型生物基聚酯纤维

荷兰Avantium公司已证实PEF(聚呋喃二甲酸乙二酯)也可以用来制成纤维,甚至可以将PEF瓶回收制成PEF纤维。这些纤维可以加工成100%生物基T恤。德国亚琛工业大学纺织技术研究所(ITA)通过传统聚酯加工技术和设备,对PEF纤维的纺丝、织造和染色进行了研究。     

食品包装用生物塑料研究进展

在白色污染和石油危机日趋严重的今天,具有生态友好特征和可持续性的生物基质-生物分解塑料有望替代部分石油基塑料成为一种新型基础原材料,在农业、包装、生物医用等领域已开始显示出巨大的市场潜力。本文介绍了聚乳酸、淀粉基塑料、聚羟基烷酸酯等几类最有可能率先实现产业化并用于食品包装材料的生物基质-生物分解塑料,对其在食品包装材料应用方面所具有的优势和存在的问题进行了评价,并对目前国内外在这几类材料的生产和应用技术及产业化等方面的最新进展进行了归纳。     

番茄红素的微胶囊化、稳定性及生物利用率的研究进展

番茄红素是一种很不稳定的脂溶性色素,在加工和储存过程中容易氧化或异构化。近年来人们已经应用微胶囊化来改善番茄红素的不稳定性。微胶囊化的番茄红素能减少与外界的接触,免受外界因素的不利影响,增加番茄红素的储存稳定性,提高其在肠道中的生物利用率。本文对番茄红素微胶囊的制备、储存稳定性及生物利用率进行了综述,以期为番茄红素微胶囊技术的应用提供参考。     

纺织品前处理中的生物加工技术新进展

纺织品的染整加工以高污染、高能耗和高消耗而著称,亟待进行绿色制造的转型升级。生物加工作为一种节能环保的加工方式,是实现纺织品绿色制造的重要途径。近年来,以酶的应用为代表的生物加工技术一直是研究的热点。文中分别从概念、发展历程、生物催化剂种类与作用机理、加工工艺与影响因素、工艺特点与存在问题、发展趋势等方面,对生物退浆、生物精练、生物漂白、生物脱胶4类纺织品前处理中的生物加工技术进行综述。     

日本积极发展生物降解塑料技术

据悉 ,为了治理污染 ,保护地球环境 ,日本正在积极发展生物降解塑料制造技术。生物降解塑料是指利用生物的物质生产功能制造出具有优良性能和特异性能的生物高分子材料。这种材料在使用后能够自动分解 ,或转化为水和二氧化碳 ,或转化为有机肥料 ,因此它被称为“清洁塑料”。生物降解塑料即能够以石油衍生物以及农作物衍生的各种天然物质为原料 ,应用生物化学合成技术加以生产 ,也可以使用植物淀粉、纤维素等生物高分子进行制造。日本在研究开发生物降解塑料生产技术方面不断取得进展。据报道 ,日本理化研究所于19 87年开发出生物聚酯制造技…     

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.