Fabrication of Silk Fibroin Nanofibres by Needleless Electrospinning

Silk fibroin nanofibres were fabricated using a needleless electrospinning technique. The procedure focused on a new method for the preparation of a spinning solution from silk fibroin. The role of the concentration of silk fibroin solution, applied voltage and spinning distance were investigated as a function of the morphology of the obtained fibres and the spinning performance of the electrospinning process. The biocompatibility of the obtained fibre sheets was evaluated using an in vitro testing method with MG‐63 osteoblasts. The solvent system consisted of formic acid and calcium chloride that can dissolve silk fibroin at room temperature, and a rate of 0.25 g of calcium chloride per 1 g of silk fibroin was required to obtain a completely dissolved silk fibroin solution. The diameters of the silk electrospun fibres obtained from the formic acid–calcium chloride solvent system ranged from 100 to 2400 nm, depending on the spinning parameters. Furthermore, increasing the concentration of the silk fibroin solution and the applied voltage improved spinning ability and spinning performance in needleless electrospinning. In addition, in vitro tests with living cells showed that the obtained electrospun fibre sheets were highly biocompatible with MG‐63 osteoblasts

Dyeing, Fastness, and UV Protection Properties of Silk and Wool Fabrics Dyed with Eucalyptus Leaf Extract by the Exhaustion Process

This research was concerned with dye extraction from the leaves of eucalyptus and with the application of this dye for silk and wool fabric dyeing by the exhaustion process. Optimal results were achieved when dyeing at 90 degrees C for 40 minutes and at pH 4. Silk and wool fabrics dyed in a solution composed of eucalyptus extract from leaves in combination with a mordant compound showed a shade of yellowish-brown. An exception was when the fabrics were dyed with FeSO4 mordant, resulting in a shade of dark grayish-brown. The colour fastness to light and rubbing after dyeing the silk and wool fabrics treated with the mordant was investigated, the results of which showed fair to good fastness, whereas the colour fastness to washing was at a good to very good level. The results confirmed that natural dyes from eucalyptus leaf extract have potential applications for fabric dyeing and producing ultraviolet (UV) protective silk and wool fabrics

Preparation of nanofibrous mat using eco-friendly, biocompatible and biodegradable material

A novel blend of pectin/ chitosan (CS)/polyvinyl alcohol (PVA)has been prepared as a nanofibrous scaffold for skin tissue engineering and wound healing applications. Pectin has been used as an eco-friendly, non-toxic and water-soluble polymer to improve nanofibre properties. Pectin as a poly-anion polymer, in combination with chitosan polycationic polymers, creates a cross-linked poly-electrolyte complex with biocompatible properties. The CS/PVA solutions containing various concentrations of pectin are electrospun to form a 3D pectin/ CS/ PVA nano fibrous scaffold. Mechanical and antibacterial properties of the nanofibrous scaffolds are evaluated by various instrumental techniques, such as Attenuated Total Reflection-Fourier Transform Infrared, Scanning Electron Microscopy, nitrogen content and Differential Scanning Calorimetry. Mechanical properties are found to be improved and the strong antibacterial activity of the pectin/CS/PVA nano fibrous scaffold is confirmed against Escherichia coli, Staphylococcus aureus, Klebsiella and Candida albicans.

การพัฒนาสารกั้นสีจากแป้งที่ได้จากหัวบอนเพื่อใช้ในการพิมพ์ย้อมผ้าแบบรีซีสต์

รายงานวิจัย -- มหาวิทยาลัยเทคโนโลยีราชมงคลพระนคร, 2556The purpose of this research was to study the white resist printing with colour resistant material from flour of wild taro (Colocasia Esculenta (L.) Schott) and using reactive, pigment and natural dyes as dyestuffs. Five formulas of printing pastes were applied to light cotton, thick cotton and silk fabrics by the use three techniques nauely Silk screen (White resist and colour resist methods),stencil and batik. The optimal ratio of colour resistant materials from flour of wild taro were compose of 20 grams flour of wild taro, 32-36 ml. water, 30-34 ml. sodium chloride, 10-13 ml. calcium hydroxide, and 1-4% vegetable oil. The viscosities of printing paste from five recipes were shown in the rage between 559.9-671.9 Centipoise. All five recipes can resist dyestuffs and also easy to remove the flour of wild taro. The pattern at resist printing area of fabrics shows sharpness and whiteness. The colour fastness to washing, water and perspiration on cotton and silk fabric results were ranging between poor to fair level when using reactive and natural dyes as dyestuff. However, the fastness property of pigment dye shows medium to good level. The colour fastness to rubbing is shown to be in range of 4 to 4-5 for all recipes. The ratings of colour fastness to light in terms of colour change are fair to good (4 to >6).Rajamangala University of Technology Phra Nakho

Properties of silk fabric dyed with eucalyptus, quercetin, rutin and tannin using padding techniques

Abstract: Natural dyes from eucalyptus leaf extract, quercetin, rutin and tannin were applied to silk fabric by the padding techniques, namely the pad-batch and pad-dry techniques under different condition. In this experiment, ferrous sulfate was used as a mordant. The dyeing properties were evaluated by measuring K/S values and CIELAB. The different fastness properties were evaluated. The effect of dyes at different concentration levels with respect to their colour strength was also studied

การออกแบบผลิตภัณฑ์สิ่งทอจากผ้าย้อมใบลำไยเพื่อส่งเสริมเศรษฐกิจสร้างสรรค์ ในพื้นที่ตำบลยุหว่า อำเภอสันป่าตอง จังหวัดเชียงใหม่

รายงานวิจัย -- มหาวิทยาลัยเทคโนโลยีราชมงคลพระนคร, 2557This research aims to experiment with natural dye from the longan leaves, Color fastness, UV protection, Designed textile products from Textile dyeing of longan leaves. and to teach the dye from longan leaves for design and processing of textile products to the community under the concept of the creative economy. The study consisted of two parts, The first part is Color fastness and UV protection from fabric dye from longan leaves. The second part is Designed textile products from Textile dyeing of longan leaves. The research area at Yu Wa San, Pa Tong district, Chiang Mai province area planted with longan. This research is part of the solution to the problem of waste longan leaves. In addition, farmers have to produce compost leaves and fruits are often destroyed by the fire. Impact on air pollution and Haze occurred in Chiang Mai now. Natural dye extracted from longan leaves was applied to a silk fabric by exhaustion dyeing process. Aluminium potassium sulfate, ferrous sulfate, copper sulfate, and stannous chloride were used as mordants. The dyeing was conducted with and without metallic salt mordants, using three different mordanting methods, pre-mordanting, meta-mordanting, and post-mordanting. The colour of each dyed material was investigated in term of the CIELAB (L*, a* and b*) and K/S value. The color fastness to washing, rubbing, perspiration, light, and water of the dyed samples was determined according to ISO test method. The results show that the optimal results were achieved when dyeing at 80 ?C for 50 minutes and at pH 3. Silk fabric dyed in a solution composed of a Longan from leaves without mordant showed a shade of pale yellowish-brown, while those mordanted with stannous chloride, alum, and copper sulfate produced a variety of medium to dark yellowish-brown color shades. However, duller and darker brown shade was obtained with ferrous sulfate mordant. The color fastness to washing, water, perspiration and rubbing were good to very good. However, the light fastness results showed fair level, except fabric without mordanted, whose colour change rating was poor. The results confirmed that natural dyes from longan leaves extract with metal mordants have potential applications in fabric dyeing and in producing very good UV-protective silk fabrics. The second part is research data collected from literature research related research and field data was collected by interviewing, recording a career field research, brainstorming sessions and participatory action research between the villagers to researchers. The findings presented by descriptive analysis. The result is Textile product design of longan leaves dyed fabrics must take into account the capacity of the group. The villagers have restrictions on the production of textile products. There is no potential for forming other products. In addition to the garment as well as the group was started. The natural dyes of the longan leaves is new knowledge for the group. Therefore, textile products in the early to conclude that the textile products the group members have expertise in manufacturing men's casual shirts ladies casual shirts and scarf. Create patterns with a variety of tie-dye technique. The silk material used as the main material used is cotton minority. Users is a group of conservative tastes, nature lovers and those with artistic taste. The procession design and production-oriented textile products are Green DesignRajamangala University of Technology Phra Nakho