Phosphonic Acid Functionalization of Hyperbranched Polyamidoamine Grafted Ultrafine Silica to Prepare the Flame Retardant for Cotton Fabric

Polyamidoamine (PAMAM) dendrimers, the starburst polymers with a plurality of terminal functional groups have attracted considerable interest due to their novel functionalities such as nanoscopic containers, delivery devices, ultrafine colloid stabilizers and nanocomposite materials [1-8]. Surface modifications of terminal groups with different functionalities such as acetamide, hydroxyl, carboxyl or quaternized PAMAM dendrimers further increase the versatile applicability of these materials[9-13]. Focused on nanoparticle fillers such as carbon black and silica, these materials are widely used for rubber and plastics. A good uniform dispersion of extremely fine particle size for most of their applications is important.Grafting of hyperbranched polyamidoamine (PAMAM) dendrimer onto ultrafine silica followed by the introduction of phosphonic acid groups onto branch ends was carried out. First, an initiating site was incorporated into silica surface by reacting the silica silanol group with 3-aminopropyltriethoxysilane, producing amino-functionalized silica. The free amine group content was controlled by varying ratios of methanol to water in the hydrolysis step of sol-gel reaction. Then grafting of PAMAM was performed by repetitive reactions between Michael addition of silica amino groups to methyl acrylate and amidation of the resulting terminal methyl ester groups with ethylenediamine. Amino group content in each generation was determined. This was found to be significantly lower than theoretical value due to unavoidable side reactions. After the G3.0 hyperbranched PAMAM grafted onto silica was synthesized, phosphonic acids functionalization of the terminal amino groups by the Mannich type reaction was carried out. The phosphorylated hyperbranched PAMAM grafted silica was achieved and its application on cotton fabric to produce phosphonated cellulose was studied

การศึกษาประสิทธิภาพการใช้งานระบบบริหารงานบุคคล มหาวิทยาลัยเทคโนโลยีราชมงคลพระนคร

รายงานวิจัย -- มหาวิทยาลัยเทคโนโลยีราชมงคลพระนคร, 2557The first purpose of this research is to study the using of personnel management system of Rajamagala University of Technology Phranakhon. Secondly the satisfaction in system using is suggested. The investigation and gathering information from university workers are done by questionnaire of satisfaction. The information is evaluated by using frequency, percentage, mean and standard deviation term. The reliability of two samples is tested by t-test using Alpha Coefficient of Cronbach and the reliability of more than two samples is tested by One Way Analysis of Variance. The results showed that the efficiency of using the personnel management system is the same as the system which is used in division of personnel management administration and division of general administration. The setting, manual and log out of system which used in sub-system of each role are consistent with research hypothesis. The analysis of satisfaction of all workers, between sexes (male and female), and between duties (support and academic staff) showed that the satisfaction in personnel management system is at high level. The university plan to develop the system continuously to face the changing and the present.Rajamangala University of Technology Phra Nakho

Causticization and Anticrease finish in Continuous Process

รายงานการวิจัย--มหาวิทยาลัยเทคโนโลยีราชมงคลพระนคร, 2553The adsorption of cotton fabric is improved by treatment with sodium hydroxide, which is called causticization method. In the method, it is necessary to wash off unreacted sodium hydroxide from the fabric and then neutralize with some acids, such as acetic acid and sulphuric acid. In this research, citric acid was used to neutralize causticized fabric and anticrease finish on cotton fabric. The citric acid is non-formaldehyde anticrease finishing agent. So that the two processes, i.e. causticization and anticrease finish, could be combined into one continuous process. And it was found that the causticization would improve some properties of anticrease fabric with citric acid. From the result, it showed that the anticrease fabric had lower tensile strength than untreated fabric. The anticrease finish with 6% w/v citric acid had higher tensile strength than 8 and 10 % w/v, respectively. When concentration of acid, curing temperature and time were higher, wrinkle recovery angle would be increased. The effect of catalyst showed that anticrease finish using sodium hypophosphite as catalyst was higher wrinkle recovery angle and tensile strength than non-catalyst finish. The causticization before anticrease finish would increase tensile strength and whiteness of fabric when compared to only anticrease finish. The effect of catalyst showed that at low acid concentration, increasing of catalyst didn’t have effect on tensile strength and wrinkle recovery angle value. At higher acid concentration, trend of tensile strength was decreased whereas wrinkle recovery angle increased and slightly effect on whiteness.Rajamangala University of Technology Phra Nakho

การศึกษาปัจจัยที่มีผลต่อการออกระหว่างศึกษา : กรณีศึกษาคณะอุตสาหกรรมสิ่งทอและออกแบบแฟชั่น มหาวิทยาลัยเทคโนโลยีราชมงคลพระนคร

รายงานวิจัย -- มหาวิทยาลัยเทคโนโลยีราชมงคลพระนคร, 2558A Study of Factors Affecting Student’s Decision to Drop out School: A Case Study of Faculty of Industrial Textiles and Fashion Design, Rajamangala University of Technology Phra Nakhon was an applied research. It was designed for analyzing the voice of customers in student studying management. The samples group was four department students in the Industrial Textiles and Fashion Design faculty as Garment Technology, Textile Chemistry Technology, Fashion and Design, and Product design who retired during study and graduated in 2014 and 2015 academic year. The research results were used for improving the study efficiency and reducing the unexpected study. From the results shown, the most problem was withdrawn registration especially in the first and the second year student. Garment technology department was the highest rate of retention after that Fashion and design, Textile Chemistry Technology, and Product design were respectively. The education satisfactions survey was found the moderate level for curriculum and lecturer as the mean 2.57 and 3.14, orderly. Additional, the environmental satisfaction was low as 2.26 for the unexpected education students. In the other hands, the graduated students had the greater satisfactions for the whole factors. The curriculum satisfied was good as 3.30, the lecturer was best as 3.67, and the environment was moderate as 2.95, correspondingly. From these results, the Faculty of Industrial Textiles and Fashion Design were developed and pay attention in the subjects and lecturer in the first and second year education. The understanding of core study and the essential of each department was the significant factor for retaining and priding the student until they graduated in the Faculty of Industrial Textiles and Fashion Design.Rajamangala University of Technology Phra Nakho

การพิมพ์สีธรรมชาติจากเปลือกลูกจากแห้ง

รายงานวิจัย -- มหาวิทยาลัยเทคโนโลยีราชมงคลพระนคร, 2556The aim of this research is to study white and colour resist printing of dye extracted from dry nipa palm shell. The printing recipes and fixation condition were studied in this work. The result of white resist printing showed that 30 % owp of sodium carbonate (Na2CO3) was used to be a resisting agent. The steam fixation for 15 minutes was suitable to show a good white resist printing in whiteness and sharpness of printing pattern. The whiteness value was 35.05. The washing and rubbing fastness were good to very good and light fastness was fair. The tensile strengths of warp and weft directions were decreased to 10.29 % and 4.25 %, respectively. The colour resist printing was using Curcuma longa Linn. powder as illuminant dye. The dye was miscible in 30 % owp of sodium carbonate. The colour resist printing results were corresponding as white resist printing results. The 15 minute of steam fixation showed a good colour resist printing. The Curcuma longa Linn dye could be fixed on silk fabric and showed a good colour strength and sharpness of pattern. The washing and rubbing fastness were good to very good. And light fastness was fair. The tensile strengths of warp and weft directions were decreased to 18.37 % and 4.18 %, respectively.Rajamangala University of Technology Phra Nakho

การเพิ่มมูลค่าเศษด้ายพอลิเอสเตอร์ตามแนวคิดด้านการออกแบบเชิงนิเวศเศรษฐกิจ

รายงานวิจัย -- มหาวิทยาลัยเทคโนโลยีราชมงคลพระนคร, 2565The purpose of this research was to design and develop products from polyester yarn scraps according to an eco-economic design concept. The workpiece is formed by the compression molding machine used in the industrial system. Researchers studied the waste materials used in various processes of manufacturing in textile establishments to increase their value by designing a new product or by developing polyester yarn scraps. According to the research process, with the upcycle method that focuses on using resources for maximum value by turning the scarps into new products and eco-design concepts to increase the value of plastic polymer waste, one of the concepts of resource efficiency (4Rs) by recycling and design process. The research focuses on the process of polyester yarn scrap forming, especially from the textile industry, with the potential to be re formed to create new products with beautiful, shapes and unique patterns. From polyester yarn scarps through the extrusion process. By using the compression molding machine with a compression force of 80 tons, the temperature range and the time are controlled appropriately. Under the mold prototype hat from or flash mold.Rajamangala University of Technology Phra Nakho

การลอกกาวไหมด้วยยางมะละกอ

รายงานวิจัย -- มหาวิทยาลัยเทคโนโลยีราชมงคลพระนคร, 2550Degumming process is a fundamental process for silk yam and silk fabric finishing. The main objective is scouring the substrate such as silk gum (sericin), wax and fatty acid from silk fiber. The principle of degumming process is destroying the peptide linkage of amino acid in sericin structure into a small molecule which is soluble in water. The hydrolysis reaction performed by acid, alkaline, enzyme, surfactant as soap, and high pressure steam process. The conventional methods favor degumming with soap and sodium carbonate. This process has a problem on the surface area of silk. Proteolytic enzymes can answer this problem but it seldom use because of a specific condition and high cost. For this reason, the insteading of papain enzyme from dry latex of Carica payapa Linn. was decided to use for silk degumming at any condition study. This research was concerned with the silk degumming using papain enzyme form dry latex of Carica payapa Linn. The degumming process was performed at the temperature vary from 55 -85 degree Celsius, time fromlO to 40 minutes and the amount of dry latex ranging from 0 to 4% owf in order to study the suitable condition for degumming and surface morphology. The efficiency of degumming process was evaluated by determination of tensile strength and stainiqgJest with dire~~ dyes (C.1. Direct Red 80~StaIDing result.will be opposed to degumming efficiency. The result was revealed; the appropriate conditions for silk degumming with dry Carica payapa Linn. 's latex were recommended as follows : the amount of dry latex solution of 4 % owf at 75 degree Celsius for 30 minutes. The degummed fibers leaves lustrous, soft and surface smooth. This condition does not have effect to tensile strength and fiber surface.Rajamangala University of Technology Phra Nakho

การควบคุมคุณภาพการย้อมสีและตกแต่งสำเร็จเส้นด้ายผักตบชวาและวัสดุประกอบเพื่อการแปรรูปผลิตภัณฑ์เชิงพาณิชย์

รายงานวิจัย -- มหาวิทยาลัยเทคโนโลยีราชมงคลพระนคร, 2560Quality control of dyeing and finishing of Water Hyacinth yarns and their transformed materials for commercial was a main objective to establish the dye database of synthetic dye and natural dye. The dye database was a data for quality control in dyeing process of raw material as Water Hyacinth yarns, also it resolved the un-repeatability dyeing problem. Reactive dye was used for synthetic dye database creation on dry Water Hyacinth yarns at 80oC for 30 minutes. Red as Hicion Red He-3B, yellow as Hicion Yellow HE-4RN, Blue as Hicion Navy Blue HER 150%, and black as Hifix Black KNN were the represent synthetic dye and Sodim sulphate 20 g/l and sodium carbo nate 20 g/l were used as auxiliaries. The other hands, the natural dye database was forming from Ebony tree, Caesalpinia sappan and Turmeric. They were dye on dry Water Hyacinth yarns at 80oC for 30 minutes and Sodim sulphate 20 g/l was the auxiliary. Whereas, Butterfly pea were dye at 80oC for 30 minutes by Sodim sulphate 20 g/l and sodium carbonate 20 g/l were the auxiliaries. The whole dye database was defined the totally in Primary, Secondary and ternary dye cycle. The transfer knowledge was distributed to the enterprise at Nakhon Prathom Provincd as “Chumchonjaksanpaktobchawha Bann klongnokkratum”. The topics were “How to establish the synthetic and natural dye database”, “Water repel lent finishing”, and “developed and transformed the Water Hyacinth to products”. The target group was very satisfied in this topic as 4.39. In the result, the proportion between economic and social factor by the income increasing in 1 year was 5.04. So, the research project was achievement.Rajamangala University of Technology Phra Nakho

การพิมพ์สีครั่งบนผ้าฝ้ายและผ้าพอลิเอสเตอร์โดยไม่ใช้การมอร์แดนท์สำหรับผู้ประกอบการรายย่อย

รายงานวิจัย -- มหาวิทยาลัยเทคโนโลยีราชมงคลพระนคร, 2561This research had an aim for studying the printing process of LACCIFER LACCA KERR. (LAC) on cotton and polyester fabric. The Lac dye was extracted by using Sodium hypochlorite solution, Sodium hydroxide, Hydrogen peroxide and diethyl ether then Acetic acid was used for dye sedimentation. Then,the printing condition and color fastness to washing, crocking and light were examined. The efficiency of solution for extraction process were found Diethyl ether > Sodium hypochlorite solution > Sodium hydroxide > Hydrogen peroxide, respectively. The hot air was suitable fixation process for cotton and polyester printing. The cotton fixation was 150oC for 5 minutes, it is 11.87 in color strength. And, the polyester fabric was fixed at 220oC for 3 minutes, the 8.27 color strength was shown. The both of cotton and polyester were printed with Lac dye had the good color fastness to crocking and light and moderate in washing fastness. This study can apply the Lac dye on cotton and polyester fabric by a printing technique without mordanting. Then it can reduce some chemicals in the textile printing industry. This process can applied and transfer for small enterprise for Lac value added appication.Rajamangala University of Technology Phra Nakho

การใช้ประโยชน์จากน้ำแช่เมล็ดถั่วดำแห้งในกระบวนการย้อมสีสิ่งทอ

วารสารวิชาการและวิจัย มทร.พระนคร, 12 (2) : 138-147The purpose of this research was to investigate the use of soaked black bean water and to add value to it, otherwise it is considered as colored waste water. The soaked black bean water was analyzed for phytochemicals and dyeing process was carried out silk, cotton, and polyester fibers. Dried black beans were soaked in water, ratio 1:1, for at least 12 hours. The dyeing process involved soaking the fiber in soaked black bean water at 100o for 30 min. to determine the type of fiber, staining, and color fastness. Results showed presence of Anthocyanin, Anthraquinonoid, Terpenoid, Saponin, Tannin and Flavonoids in soaked black bean water. It was found that dye could be absorbed by silk fabric in an acidic condition. The shade appeared red-brown at L*44.17, a*16.88 and b*20.13, color strength was 6.19 and ultraviolet protection was blocked more than 97.5 percentages as UPF 50+. Moreover, the color fastness grading in crocking property was very good to excellent (CF 4-5), good washing fastness (WF4) and moderate fastness in the presence of light (LF 4). In conclusion, soaked black bean water can be used for dyeing for silk fabric and enhance UV protection.Rajamangala University of Technology Phra Nakho