提高超细纤维合成革透湿透气性能的研究进展

本文简要介绍了超细纤维合成革与天然皮革的结构与特点,指出了超细纤维合成革相比天然皮革透湿透气性差的原因,综述了提高超细纤维合成革透湿透气性能的方法——革基布改性、聚氨酯树脂改性以及加工工艺的改进。     

超细纤维合成革仿天然皮革研究进展

概述了超细纤维合成革与天然皮革的区别与联系,阐述了超细纤维合成革卫生性能、染色性能较差的原因。另外,基于超细纤维合成革的两种主要组分聚酰胺和聚氨酯,作者综述了超细纤维合成革仿天然皮革的研究方法。旨在通过对超细纤维合成革改性方法的归纳整理,为后续超细纤维合成革仿天然皮革的研究起到抛砖引玉的作用。     

提高超细纤维合成革染色性能的研究进展

概述了超细纤维合成革的结构特点与染色性能,分别从染料种类、染色条件、超细纤维合成革基布改性及添加染色助剂4个方面,综述了提高超细纤维合成革染色性能的研究现状,并对提高其染色性能的研究方向进行了展望。     

超细纤维合成革的染色与功能整理研究进展

为了解决超细纤维合成革在制备、染色以及功能整理等方面出现的问题,系统阐述了超细纤维合成革的发展历程以及未来超细纤维合成革的发展方向;分析了染色工艺、染色助剂、染色基布的改性对聚酰胺超细纤维合成革染色性能的影响,评述了聚酯超细纤维合成革的染色现状;总结了国内超细纤维合成革经功能整理后的附加性能,包括阻燃、防污、抗静电、抗菌、耐寒、调温等。最后指出了未来超细纤维合成革在制备方式、高性能染色以及功能化整理方面应大力发展的方向,以对企业的产品优化升级、提高产品的市场竞争力提供指导。     

超细纤维合成革的市场及技术进展

超细纤维合成革是以聚氨酯为基体,用超细纤维非织造布增强的复合材料。高质量超细纤维合成革的研制和开发是市场的需求。本文结合市场与技术介绍了国内外超细纤维合成革行业的发展现状及趋势,期望国内的生产企业能结合自身的生产实际吸收国外的先进技术和理念并实现再创新。     

超细纤维合成革的染色性能及研究进展

简要介绍了超细纤维合成革的主要性能,论述了超细纤维合成革的染色性能,由于超细纤维线密度小,比表面积大,虽上染速度快、移染性好,但在匀染性、染深性、染色牢度等方面表现较差;聚氨酯分子存在不易染深、湿牢度不好等问题,因此需对超纤革进行研究改性,主要概述了超细纤维单一染料染色、拼混染料染色、聚氨酯染色以及交联剂、助剂等对超细纤维合成革的染色影响等。最后对超细纤维合成革染色技术的发展前景做了展望。     

交联剂改性超细纤维合成革基布的性能

针对超细纤维合成革存在吸湿性及透水汽性差的问题,选用栲胶等填充材料及牛蹄油等柔软剂对超细纤维合成革基布进行亲水交联改性。探讨了交联剂种类、交联剂用量、改性时间、改性温度及体系pH 值对超细纤维合成革基布性能的影响。结果表明：与未处理基布相比,交联改性基布的吸湿性提高了35.66%,透水汽性提高了53.23%,基布的抗张强度得到提高,增重增厚十分明显,且改性不影响其柔软度。扫描电子显微镜、水接触角、比表面积、综合热分析及X 射线衍射分析结果表明：交联改性基布的纤维松散程度明显提高,基布润湿性增加,比表面积增大,纤维规整度发生变化,且交联改性后基布具有较好的热稳定性。     

体育用品用合成革材料的制备研究

由于运动员剧烈运动时会产生热量与汗液,所以体育用品需具备良好的透气性、吸水性与机械性能。而随着各式各样合成革材料的衍生,以及制备工艺的不断改进,超细纤维合成革逐渐拥有了天然皮革的耐磨性、耐折性与舒适性等优势,还可为运动员提供轻质舒适的使用感。所以它逐步取代天然皮革成为体育用品制备领域用最新、最佳材料。本文以体育用品领域用超细纤维合成革材料为例,以改性纳米TiO₂与水性聚氨酯等为主要材料对其进行了改性制备,并测试分析了其卫生性能与力学性能。结果发现,添加改性纳米TiO₂的超细纤维合成革材料贮存稳定性整体表现良好;改性纳米TiO₂的掺加在很大程度上提升了超细纤维合成革材料的透气性与透水汽性、耐水解性、耐磨性与耐折性,而掺加量为3%时材料性能表现最优。     

超纤革仿天然皮革研究进展

概述了天然皮革的结构特点,并与超细纤维合成革性能进行对比,指出超细纤维合成革与天然皮革相比,卫生性能及染色性能差异是由于天然皮革具有复杂的三维立体结构以及纤维中具有大量的活性基团。分别从仿天然皮革的三维立体结构、对超细纤维合成革基布和水性聚氨酯进行改性仿天然皮革的物质组成、超纤革制品的后整理3个方面,综述了超细纤维合成革仿天然皮革的研究进展,并对超细纤维合成革仿天然皮革技术的发展前景做了展望。     

超细纤维在合成革领域中的应用

简要介绍了超细纤维的定义和应用,对超细纤维的生产方法做了概括性描述,并着重对超细纤维在合成革领域中的应用做了较详尽的介绍。     

Textural Properties of Cold-set Gels Induced from Heat-denatured Whey Protein Isolates

A 9% whey protein (WP) isolate solution at pH 7.0 was heat-denatured at 80°C for 30 min. Size-exclusion HPLC showed that native WP formed soluble aggregates after heat-treatment. Additions of CaCl2 (10–40 mM), NaCl (50–400 mM) or glucono-delta-lactone (GDL, 0.4–2.0%, w/v) or hydrolysis by a protease from Bacillus licheniformis caused gelation of the denatured solution at 45°C. Textural parameters, hardness, adhesiveness, and cohesiveness of the gels so formed changed markedly with concentration of added salts or pH by added GDL. Maximum gel hardness occurred at 200 mM NaCl or pH 4.7. Increasing CaCl2 concentration continuously increased gel hardness. Generally, GDL-induced gels were harder than salt-induced gels, and much harder than the protease-induced gel.     

Occurrence of bisphenol-F-diglycidyl ether (BFDGE) in fish canned in oil

The levels of bisphenol-F-diglycidyl ether (BFDGE) were quantified as part of a European survey on the migration of residues of epoxy resins into oil from canned fish. The contents of BFDGE in cans, lids and fish collected from all 15 Member States of the European Union and Switzerland were analysed in 382 samples. Cans and lids were separately extracted with acetonitrile. The extraction from fish was carried out with hexane followed by re-extraction with acetonitrile. The analysis was performed by reverse phase HPL C with fluorescence detection. BFDGE could be detected in 12% of the fish, 24% of the cans and 18% of the lids. Only 3% of the fish contained BFDGE in concentrations considerably above 1mg/kg. In addition to the presented data, a comparison was made with the levels of BADGE (bisphenol-A-diglycidyl ether)analysed in the same products in the context of a previous study.     

Review of techniques to manufacture micro-hydrogel particles for the food industry and their applications

Microgels are ‘soft’ microscopic cross-linked polymeric particles that are being increasingly exploited in a variety of industries for rheology control, encapsulation and targeted delivery. They are valued because of the ability to tune their functionality to address specific applications in oil recovery, coatings, drug delivery, cosmetics, personal care and foods. Food microgels are typically biopolymer hydrogels in the form of microspheres, nanospheres (also called nanogels), spheroids and fibres. The utilisation of engineered microgels in foods has so far been limited, despite their great potential to address several needs in the food industry, including: satiety control, encapsulation of phytonutrients and prebiotics, texture control for healthier food formulations (e.g. reduced fat products), and targeting delivery to specific areas in the digestive tract. We review the scientific and patent literature on the utilisation and manufacturing methods for producing microgels with an emphasis on micro-hydrogels for food applications.     

12—A CRITIQUE OF SOME HYPOTHESES RELATING TO THE HETEROGENEITY OF THE HIGH-SULPHUR PROTEINS OF WOOL

Joubert and Burns prepared a large number of fractions from the high-sulphur proteins of wool and estimated their molecular weights and amino-acid compositions. Their data have been re-examined in order to look for statistically significant interrelations between amino acids and between the proportion of various amino acids and molecular weight. Statistical analysis of the data is also used to examine the credibility of some hypotheses concerning the mechanism of keratin biosynthesis and to provide further evidence for the existence of families of proteins within the high-sulphur fractions of wool.     

Contribution of European research to risk analysis

The European Commission's, Quality of Life Research Programme, Key Action 1—Health, Food & Nutrition is mission-oriented and aims, amongst other things, at providing a healthy, safe and high-quality food supply leading to reinforced consumer confidence in the safety of European food. Its objectives also include the enhancing of the competitiveness of the European food supply. Key Action 1 is currently supporting a number of different types of European collaborative projects in the area of risk analysis. The objectives of these projects range from the development and validation of prevention strategies including the reduction of consumers risks; development and validation of new modelling approaches; harmonization of risk assessment principles, methodologies, and terminology; standardization of methods and systems used for the safety evaluation of transgenic food; providing of tools for the evaluation of human viral contamination of shellfish and quality control; new methodologies for assessing the potential of unintended effects of genetically modified (genetically modified) foods; development of a risk assessment model for Cryptosporidium parvum related to the food and water industries; to the development of a communication platform for genetically modified organism, producers, retailers, regulatory authorities and consumer groups to improve safety assessment procedures, risk management strategies and risk communication; development and validation of new methods for safety testing of transgenic food; evaluation of the safety and efficacy of iron supplementation in pregnant women; evaluation of the potential cancer-preventing activity of pro- and pre-biotic ('synbiotic') combinations in human volunteers. An overview of these projects is presented here.     

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 Latest Data about Development of Chinese Printing Industry in 2013

In the 2014 China（Shanghai）International Printing Week,Director Wang Yanbin released the latest data about development of Chinese printing industry in 2013.According to statistics,in 2013,the total output value of Chinese printing industry exceeded 1trillion Yuan for the first time,reaching 1.03985 trillion Yuan.There were 105,000 printing enterprises in China,employees were 3.415 million.The total asset was 1.06247 trillion Yuan;     

The State Council Issued "Directory of Government Approved Investment Projects(2013 Edition)"

正On December 2nd,2013,the State Council issued the notification of"Directory of Government Approved Investment Projects(2013 Edition)"(hereafter referred to as"notification").It is pointed out in the"notification"that in order to further deepen reforms in investment systems and administrative examination and approval systems,simplify administrative procedures and delegate powers to lower levels,earnestly     

China textile machinery: taking off in progress

正Among the 1600 exhibitors who take apart in the ITMA ASIA+CITME2014 2/3 are Chinese manufactures.If the numerous figures failed to attract your attention,the increase of quality should draw your focus.To adopt the demand of developing textile machine market,domestic textile machinery enterprises now follow the slogan of"technology drives development"to enhance product competitiveness.Our domestic sellers will showcase product ranging from spinning,weaving,dyeing and printing,     

Top Ten News of China's Paper Industry 2013

On December 24th, 2013, the meeting on the selection of top 10 news of China＇s paper industry 2013 sponsored by 〈China Paper Newsletters〉 was held in Beijing. The yearly selection of the top l0 news, which began in 2000, has become a brand activity widely recognized in the industry thanks to the support from the authorities at all levels and public participation.