紫外线吸收剂/分散染料同浴上染涤纶的性能

采用高温高压吸尽法将紫外线吸收剂和分散染料单独及同浴上染到涤纶织物上,比较了两种上染条件下紫外线吸收剂和分散染料对涤纶织物上染率,分别计算出两者对涤纶纤维的亲和力,并测定了所得织物的表观颜色深度值和耐光色牢度。探讨紫外线吸收剂与分散染料在同浴上染过程中的相互影响。结果表明:当紫外线吸收剂与分散染料同浴对涤纶织物进行上染时,两者的上染率都比单独上染时的上染率低,表现出了一定的竞染关系;所选用的紫外线吸收剂都能在一定程度上提高染色织物的耐光色牢度,其中以紫外线吸收剂UV-3改善分散染料所染涤纶织物耐光色牢度的效果最为明显。选用的紫外线吸收剂对分散染料在织物上的色光基本无影响。     

安徽省电力行业职业技能鉴定题库建设与应用

为更好地服务电力行业和国网安徽省电力有限公司的发展,贴近安全生产和优质服务的实际,结合电力行业职业技能鉴定信息化建设工作,对供电类工种试题库重新建设,形成安徽省电力行业职业技能鉴定地方题库,已然成为促进鉴定工作发展的必然趋势,为安徽省电力行业职业技能鉴定网络化考试提供有效支撑。     

聚四氟乙烯薄膜复合蒸呢包布及其应用性能

为了提高羊毛精纺面料的表面光泽及其耐久性,采用聚四氟乙烯（PTFE）微孔薄膜与传统包布复合研制新型复合蒸呢包布,测试采用新型复合包布罐蒸后毛织物的各项性能。结果表明;PTFE微孔薄膜的结构对复合包布的透湿量影响较小;采用复合包布经一次罐蒸的毛织物,其表面平整性、尺寸稳定性、力学性能、表面光泽都优于采用传统包布一次罐蒸的毛织物;采用复合包布经两次罐蒸的毛织物的表面平整性、尺寸稳定性、力学性能、表面光泽基本达到传统包布经罐蒸→电压→罐蒸的织物的效果。     

毛用反应性紫外线吸收剂的应用性能

将自制的反应性苯并三唑类紫外线吸收剂UV-WR单独或与Lanasol活性染料同浴上染羊毛织物。结果表明,经毛用反应性紫外线吸收剂UV-WR上染的羊毛织物具有较好的紫外线防护效果,并且具有一定的耐洗牢度。与染料同浴上染时,紫外线吸收剂UV-WR和Lanasol活性染料对羊毛的上染率、固色率都略有下降,两者间表现出一定的竞染作用。     

Research progress on chemical modification of silk fibroin and its applications北大核心CSCD

Mulberry silk is composed of the two major parts of two triangle-like silk fibroin fibers and sericin covering the fibers and a few lipids. After removing the sericin on the raw silk what is left is the silk fibroin fiber. Silk fibroin is the main part of silk accounting for about 75% of the total weight. Silk fibroin contains 18 natural amino acids such as glycine Gly alanine Ala serine Ser serine aspartic acid Asp and tyrosine Tyr . The secondary structure of silk fibroin has three main conformations α-helix β-fold and random coil. Under certain conditions the three conformations can transform into each other and change the mechanical properties of the silk fibroin material. Silk fibroin extracted from silk fiber is a natural polymer with biocompatibility and biodegradability. It can be further processed into different forms of materials nanoparticles films hydrogels sponges etc. It has been applied in many fields such as biomedicine and cosmetics. In order to meet the needs of different fields researchers have conducted further chemical modification treatment based on the original excellent properties of silk fibroin. Meanwhile the active groups on various amino acid residues in silk fibroin also provide chemical reaction sites for the chemical modification of silk fibroin. The chemical modification methods of silk fibroin mainly include amino acid residue modification macromolecular grafting modification and crosslinking reaction modification. Among them amino acid residue modification can modify protein amino acid residues by chemical reagents and some groups can be introduced into the side chains of silk fibroin macromolecules. Grafting modification of silk fibroin macromolecules is one of the main means to bind functional compounds to silk fibroin macromolecular chains. The properties of grafted silk fibroin are affected by the type and grafting rate of the grafts. The chemical crosslinking reaction modification of silk fibroin macromolecules is to make the macromolecular chains connected by covalent bonds and form a network structure by means of crosslinking agents enzymes or ultraviolet irradiation. The cross-linking reaction can not only form covalent bonds within and between the molecular chains of silk fibroin thus changing its structural properties and improving its stability but be used to form covalent bonds with other polymers. At present the chemical modification of silk fibroin is mainly applied in the fields of silk textiles biomedicine and environmental science. In the field of silk textiles graft copolymerization modification of vinyl and other monomers crosslinking agent modification and other methods are used to overcome the shortcomings of silk like being easy to wrinkle. The graft modified monomers mainly include ethylene methacrylate and methylacrylamide. The active groups on crosslinking agents such as polycarboxylic acid / anhydride and epoxide are covalently combined with carboxyl hydroxyl and amino groups on macromolecules of silk fibroin to improve the wrinkle resistance of silk fabrics. In the field of biomedicine silk fibroin materials with appropriate chemical modification have better biological activity drug delivery ability antimicrobial properties and mechanical properties. The optimization of these properties enables silk fibroin materials to show great potential in drug control delivery tissue regeneration and wound repair. The applied research in the field of environmental science mainly focuses on the adsorption separation and catalysis of impurities in water. Therefore the modification of amino acid residues grafting and cross-linking of protein macromolecules can change some important properties of silk fibroin and meet the requirements of various applications and functionalization of silk fibroin. In many fields of chemical modification and application of silk fibroin protein fruitful results have been achieved which has laid a good foundation for the further development of related fields and also shows that the chemical modification of silk fibroin material has great potential and application prospects. However there are still some problems that need to be overcome and further improved in the current chemical modification methods such as mild modification conditions and accurate adjustment of the degree of modification which will be the research direction of related fields in the future. © 2022 Authors. All rights reserved.     

鹤壁矿区大煤采煤机械化的发展和改革

如何实现采掘工作面高产(快速)、高效、低消耗,使煤炭资源回收率高是提高煤矿生产经济技术效益的核心。特别是特厚煤层的开采方法,有许多值得研究探讨的问题。本文仅就鹤壁矿区大煤采煤机械化的发展和改革谈一些粗浅意见。 鹤壁煤田为单一隐伏煤田。倾向西东,宏观上可视为单斜构造。大煤为主采层,其倾角一般在10～25,个别有30～45;煤层厚8.5米左右;以高倾角正断层为主,有少数幅度不大的褶曲构造;中等稳定顶板,综采分层开采测得矿压的最大平均值为37～39吨米~2。 冲枳层较厚,工作面不受地表水影响。底板砂岩水个别地方有渗出,但持续时间不长。 煤层自然发火期3～8月;煤尘有爆炸危险,爆炸指数20％左右。矿区矿井开采深度     

壳聚糖处理羊毛的染色性能研究

本研究了羊毛经壳聚糖的醋酸溶液处理后，壳聚糖在羊毛上的吸附率与不同处理条件的关系，分析和研究了壳聚糖处理对羊毛用直接染料和酸性染料染色时对上染性能的影响。     

仿牛仔真丝绸涂料染整一步法探讨

仿牛仔真丝绸生产中可采用涂料染色、树脂整理一步法工艺，它可以提高产品的折皱回弹性，节约涂料用量。     

羊毛的低温等离子体改性

用高频放电产生的低温等离子体对羊毛改性,可明显改善羊毛的润湿性,提高羊毛的上染速率;通过先进的分析、测试手段,探讨了低温等离子体对羊毛的作用及由此引起羊毛表面结构的变化。     

纳米抗静电整理剂在涤纶装饰织物中的应用研究

通过用有机醇铝水解的溶胶-凝胶法制备出稳定、均一、透明的纳米氧化铝溶胶，将其复配成纳米抗静电整理剂，通过轧-烘-焙工艺，应用于涤纶装饰织物抗静电整理，并分析了整理工艺条件对整理效果的影响。结果表明：整理剂浓度为10g／L，焙烘温度160℃、时间30s，织物的峰值电压和半衰期由原先未经整理时的4192V和大于90s，下降为9V和0.41s，抗静电效果显著。