Changes in Structure and Properties of Soybean Protein/Poly （vinyl alcohol） Blended Fibers Subjected to Wet Heat Treatment

The properties of soybean protein/poly（vinyl alcohol） （SP/ PVA） blended fibers subjected to wet heat treatment in hot water were measured. The structure of fibers was investigated by scanning electron microscope （SEM）, Fourier transform infrared （FTIR） spectroscopy, wide-angle X-ray diffraction （WXD） and differential scanning calorimetry （DSC）. The results show that the wet heat treatment above 100℃ has a great influence on the properties and structure of SP/PVA blended fibers. After the wet heat treatment at high temperature, the fibers exhibit the severe shrinking and yellowing, the great decrease in breaking strength and adhesive aggregation. The fibers show a broader main X-ray diffraction peak with the disappearance of minor diffraction peaks, a double DSC melting behavior with the peak temperatures of 215 and 233℃, and a weaker intensity of crystallization-sensitive absorbance peak of PVA component at 1 142 cm^-1. Therefore it is concluded that the wet heat treatment above 100℃ leads to a change in the crystalline structure of fibers and the scission and degradation of PVA macromolecular chains.     

Acetalization of Poly（vinyl alcohol） /Soybean Protein Fibers

Acetalizatioin on the blend fibers of poly （vinyl alcohol） （PVA） and soybean protein （SP） was studied by using dialdehydes as cross-linking agents. The optimal acetalization conditions were determined by Latin square experiment, where the modified fibers with good mechanical properties can be achieved by treating in 41 g/L dialdehyde solution at 67 ℃ for 9 min. The cross-linking reactions of PVA and SP with dialdehydes were confirmed by Fourier transform infrared （FTIR） spectroscopy. Tensile test and boiling water shrinkage measurements showed that the physical properties of PVA/SP fibers crosslinked by dialdehydes were improved comparing with those formalized fibers.     

Compatibility of Soybean Protein and Poly (vinyl alcohol)

IntroductionTheuseofsoybean ,peanut,zeinandothervegetableproteinsasinexpensivefibermaterialstoreplacewoolandsilkcanbetracedbackto 1930s.Earlyin 1935 ,theItalianfirm ,SniaViscosa ,beganlarge scaleproductionofcaseinfibers[1] .Shortlyafterward ,ICIinEngland produced peanut proteinfibersknownasArdil.CoCornProductRefiningmanufacturedzeinproteinfiberin 1939.Theseusesofseedmealsintoindustryenhancethevalueoftheagriculturematerial.Thelargeintroductionofpetroleum basedfibersduring 194 0sand 195 0s…     

甲壳胺与聚乙烯醇共混纤维

将甲壳胺与聚乙烯醇进行湿法纺丝得共混纤维,并将纤维进一步缩醛化. 缩醛化增加了共混纤维的强度,这是由于缩醛化使分子间形成亚甲基桥键以及减少了纤维内空洞所致. 扫描电镜观察还表明缩醛后的共混纤维有较好的断裂韧性. 实验表明强度和密度最大值的共混比为(10%～20%)/(90%～80%)(甲壳胺/聚乙烯醇).     

活性染料及棉纤维的染色

阐述了活性染料对棉纤维的常规染色方法和新形势下对活性染料染色的要求，介绍了一些新的活性染料染棉纤维的方法。     

大豆蛋白质纤维的成形及其结构分析

简述了大豆蛋白质纤维的成形过程，并对该种纤维分子结构进行了分析，同时．采用JSM-5600型扫描电子显微镜对其形态结构进行了观察。     

苯酚磺酞类酸性染料与蛋白质包合物的共振散射光谱

研究了几种苯酚磺酞类酸性染料与蛋白质的结合反应,发现染料pKa值与蛋白质等电点相近易于结合,共振光散射信号强,灵敏度高;染料的吸收峰、谷与染料-蛋白质包合物共振散射谷、峰波长基本对应;电负性取代基越多染料pKa值越低.     

One-bath Dyeing of Polyester/Wool Blend with Disperse Dyes

The role of auxiliary LAB as vehicle in dyeing polyester/ wool blends with disperse dyes is described. Dye exhaustion and bonding on polyester/wool samples are studied under different experimental conditions - the LAB amount, the temperature and pH value - to achieve optimum conditions. The results are compared with those obtained with and without conventional dyeing auxiliary products. Although dye exhaustion is higher in the presence of commercial carriers, the dye bonded increases markedly in the presence of auxiliary LAB in both fibers. The role played by auxiliary LAB in polyester/wool blend dyeing can provide a new method for this process.     

酸性条件下大豆分离蛋白的亚基解离

研究了不同pH值下大豆分离蛋白的Zeta电位、超速离心电泳、溶解性、荧光光谱及二级结构的变化及其规律,并进一步探讨了酸性条件下大豆分离蛋白亚基解离的机理.结果表明:酸性条件下大豆分离蛋白的亚基解离主要是由分子间静电斥力导致的,而且大豆球蛋白的解离程度远大于β-大豆伴球蛋白;溶液pH值在2.0 ～3.0之间时,Zeta电...     

改善羊毛对酸性染料吸附性能的研究

用阳离子剂对羊毛做变性处理后，可在羊毛中引入阳离子基，提高它在酸性液中的阳荷性，增加染座，增强对匀染性酸性染料的吸附能力，从而提高羊毛的上染率和染色牢度．试验结果表明，匀染性酸性染料对变性羊毛的染色深度和湿处理牢度在一定程度上均有提高．但碱性阳离子变性处理液对羊毛有一定损伤，需进一步研究改善措施．