Dyeing of sericin-modified cotton with reactive dyes

In this paper, a new air-jet weft-insertion system, which does not require any air-guide, such as a confusor or profiled reed, is discussed. Characteristics of the new double-holed relay nozzles, studied by using Pitote-tube measurement and Schlieren photography, are presented. The results of air-velocity and turbulence profiles measured by using a Laser Doppler Anemometer (LDA) are reported. The tensions developed in a stationary yarn are also studied.

Schlieren photography and Pitote-tube measurements show that, in many nozzles, the jets are either divergent or parallel with an angular lift Measurements indicate that the air velocity near the jet axis in the weft-insertion direction is much less, with the vertical component of the air velocity accounting for more than one-third of it, and that the main nozzle imparts a higher tension to stationary yarn than the relay nozzles.     

Electrospinning and characterization of poly (vinyl alcohol)–sericin nanofibers as a potential for tissue engineering applications

Poly vinyl alcohol (PVA) is a hydrophilic, biocompatible, and biodegradable polymer which has found application in biodrugs and tissue engineering. Sericin accompanying silk is a waste which is produced in scouring silk and has interesting properties which has attracted the attention of researchers. Silk sericin is also hydrophilic, biodegradable, and biocompatible. Moreover, it is cheap and anti-cancerous. Mixture of PVA and sericin in the form of 2D membrane or 3D hydrogels has been employed to heal skin damages. This research aimed at electrospinning PVA–sericin blend nanofibers in the form of a mat which has applications in tissue engineering, using dimethyl sulfoxide (DMSO) as an organic solvent. This research showed that the solution of PVA–sericin in DMSO was electrospinnable; however, the addition of urea to the solution made the electrospinning easier. The electrospinning solution contained ratio of 0:100, 10:90, 15:85, 20:80, and 25:75 sericin (%w/w)–PVA (%w/w). The electrospun PVA–sericin nanofibers had an average diameter in the range of 179–285 nm. X-ray diffractometer and differential scanning calorimetry investigations showed no reaction occurring between PVA and sericin. Polyvinyl alcohol 100% was also electrospun in DMSO. Up to now, the electrospinning of PVA in non-aqueous media has not been reported in the literature.     

丝胶组分和高湿后处理对静电纺丝素纤维结构与性能的影响

利用静电纺丝法制备了再生丝素和再生丝素/丝胶蛋白纤维,并对所得纤维进行了高湿后处理。采用扫描电镜分析了丝胶蛋白和高湿后处理对静电纺再生丝素蛋白纤维形貌的影响,采用拉曼光谱、X射线衍射和热失重分析研究了所得纤维微细结构及热性能。研究结果表明,添加丝胶蛋白有利于降低静电纺再生丝素蛋白纤维的直径及其分布,而高湿后处理对纤维的形貌没有明显影响;添加丝胶蛋白和/或高湿后处理有利于促进丝素发生向β-折叠构象的转变,并使纤维的结晶结构得到改善,从而进一步提高纤维的热稳定性。     

Synthesis and characterization of pH‐ and temperature‐sensitive silk sericin/poly(N‐isopropylacrylamide) interpenetrating polymer networks

Interpenetrating polymer networks (IPNs) composed of silk sericin (SS) and poly(N‐isopropylacrylamide) (PNIPAAm) were prepared simultaneously. The properties of the resultant IPN hydrogels were characterized by differential scanning calorimetry and SEM as well as their swelling behavior at various temperatures and pH values. The single glass transition temperature (T_g) presented in the IPN thermograms indicated that SS and PNIPAAm form a miscible pair. The swollen morphology of the IPNs observed by SEM demonstrated that water channels (pores present in SEM micrographs) were distributed homogeneously through out the network membranes. The swelling ratio of the IPNs depended significantly on the composition, temperature and pH of the buffer solutions. The dynamic transport of water into the IPN membrane was analyzed based on the Fickian equation. Copyright © 2006 Society of Chemical Industry     

丝胶的胶粘功能与蚕茧解舒优劣的关系

丝胶的胶粘功能因环境条件的作用而产生强弱变化。丝胶受多湿环境条件的影响，其分子结构由无规卷曲转化为β构象，发生胶凝作用，胶粘力增加，蚕茧解舒变劣。而合理的环境能阻止丝胶的胶凝作用，茧丝间胶着力弱，蚕茧解舒优。     

利用丝胶改善棉织物洗后平整度的研究

介绍了丝胶的构成及其应用情况，提出了纯棉织物经丝胶处理来改善其洗后平整度的新方法。先把纯棉织物放入具有一定浓度和温度的丝胶溶液中浸泡一段时间后，再经戊二醛固着处理即可。实验结果表明，经过丝胶处理后的纯棉织物的洗后平整度较前有了很大提高，几乎不随洗涤时间的增长而发生变化。     

丝胶回收方法

针对丝绸厂精练废水中所含大量的丝胶蛋白质，研究高效回收丝胶的各种方法，并分别从回收原理、工艺流程以及实际存在的问题和解决方法等方面对其进行了详细的分析研究。     

丝胶改性纤维的研究进展

就丝胶蛋白用于涤纶、棉等纤维改性的原理、方法及改性后纤维的性能等方面的研究成果作了简要综述,同时指出了丝胶改性纤维过程中存在的问题。     

Fabrication of alginate/sericin/cellulose nanocrystals interpenetrating network composite hydrogels with enhanced physicochemical properties and biological activity

Sodium alginate (SA) possesses good biocompatibility and can form hydrogel materials under certain conditions, which has been widely used in tissue engineering. However, the absence of cellular recognition sites and low mechanical strength for single-component alginate (ALG) hydrogels limit their practical applications. Therefore, enhancing the shortcomings of ALG hydrogels and augmenting their characteristics hold immense importance for their medical uses. In this study, comprehensively considering the excellent properties of cellulose nanocrystals (CNCs) and sericin (SS), the alginate/sericin/cellulose nanocrystalline (ALG/SS/CNCS) composite hydrogels were constructed by interpenetrating network (IPN) technique using hydroxyapatite/D-glucono-δ-lactone (HAP/GDL) as the endogenous ionic cross-linking agent of SA, 1-ethyl-(3-dimethylaminopropyl) carbodiimide hydrochloride/N-hydroxysuccinimide (EDC/NHS) as the chemical covalent cross-linking agent of SS and CNCS as the reinforcing agent. The effects of SS and CNCs additions on the comprehensive properties of ALG/SS/CNCs composite hydrogels, such as their morphologies, structure, mechanical properties, swelling, degradability, and cytocompatibility were investigated. The findings indicated that the ALG/SS/CNCS IPN composite hydrogels which were created through the physical blending of SA and SS, displayed a consistent three-dimensional form and a porous configuration. The weak mechanical strength of pure ALG hydrogels can be effectively improved and the swelling stability and mechanical properties of the composite hydrogels can be enhanced through the construction of IPN network and the incorporation of CNCs, thanks to the presence of intermolecular hydrogen bonding. The biodegradability of ALG/SS/CNCS composite hydrogels increased as the SS content increased, indicating that SS facilitated their biomineralization due to its inherent susceptibility to degradation. The results of the cell compatibility test conducted in a laboratory setting showed that SS and CNCS had the ability to enhance the attachment, proliferation, and differentiation of MC3T3-E1 cells on the ALG/SS/CNCS composite hydrogels. Hence, incorporating SS and CNCS into the alginate matrix to create IPN composite hydrogels could significantly enhance the physicochemical and biological characteristics of ALG hydrogels, thus rendering them appropriate for tissue engineering purposes.