Utilization dyeing process of coffea pigment as superhydrophobic coating on fabric application

Synthetic pigments and dyes was frequently used for textile products in order to fulfill the customers demand because it is less expensive and high durability compared to natural pigments or dyes. Therefore, the contribution of synthetic dyes waste water is higher and it becomes one of cause of hazardous pollution to the environment. Factories that discharge this dye waste water are harmful toxic waste and high chemical usage which can give a bad effect to the human health [1]. An alternative way need to be considered in order to overcome the problems that comes from the synthetics dyes. The alternative way that were studied in this project as the solution to the problems stated was by using natural resources which is coffee as a colorant for pigmentation or dyeing in order to replace the harmful synthetic dyeing [2]. Robusta coffee or Coffea canephora is chosen as the pigments colorant because it has minimal environmental impacts compare to synthetic pigments. Natural pigments are not harmful to the environment, which makes it so captivating for consumers. Natural pigments are biodegradable and disposing them will not lead to pollution [3]. Furthermore, natural pigments are safe to use. It does not cause any harm or health problem when abstain. Pigment appearance is altered by selective absorption and by scattering of light [4]. Other than that, different composition of natural pigments can give a wide-range of colour by modifying the concentration percentage of pigments ingredients such as Robusta coffee which brew for pigments in order to provide a varied brown colour to textile fabrics. The superhydrophobic coating fabrics for textile application provide a durable water repellent which is useful for fabrics in order to protect them from water. In addition, the fabric also can be easily clean [5]

Utilization of garcinia mangostana dyes for superhydrophobic oncotton textile application

The demand for textile products has increases rapidly nowadays and so did the production. Hence, people tend use synthetics dyes because it is cheaper and more durable as compared to natural dyes. Therefore, synthetic dyes has contributed to dye wastewater and becomes one of the causes of outrageous pollution in nowadays. Factories that discharge this wastewater as harmful toxic waste, colourfull and organic chemicals from dyeing. Chemicals such as sulphur, vat dyes, arsenic, and certain auxiliary chemicals make the wastewater highly toxic and poisonous [1]. In order to overcome this problem, an alternative way has to be found. One of the alternative way is to make a good use of the waste from the nature, for example, the peel of mangosteen. Mangosteen or known as Garcinia mangostana is one of the fruits that can be found easily in Malaysia during monsoon season. So, the difficulty of getting these fruits are not very hard. However, the rind of mangosteens are non-edible and being thrown unknowingly by most of the people in Malaysia. The rinds of the fruits contain high level of anthocyanin pigments which can be used in dyeing application of fabric. The utilization of fruit hulls of Garcinia mangostana will help to reduce biodegradable wastes in the environment. Its reuse or recycling will also aids in the halting of the release of greenhouse gases. Natural dyes are beneficial to the environment and it can reduces the water pollution [2]

Exploration to find green building materials from recycled solid wastes

This research studied the properties and the production of thermal insulation materials from recycled solid waste and their applications in residential house construction. Recycled materials that were used as specimens are aluminum, plastic, bagasse, textile, oil palm leaves, twigs, paper, corn cob, rubber, coconut husk, coconut shell, granite, wood, iron, glass, kenaf, and concrete. The specimens were produced by using composite method with epoxy solution as the binder to the loose grain of recycle waste material. Experimental method of the specimens has also been discussed in this project which is by recording the temperature of each specimen in several time periods and apply the data in the Fourier’s equation to determine heat transfer rate. This project therefore discussed mainly about theory of heat transfer which consist of conduction and radiation. From the research, it is found that textile, oil palm leaves, kenaf, coconut shell, twigs, paper, and coconut fiber are good insulator. Since the quantity of oil palm leaves and textile are abundantly available and have longer life span as compared to the rest, the oil palm leaves and textile are selected to be the based materials for the building insulation

The effects of lawsonia inermis pigmentation for superhydrophobic properties on cotton fabrics

Nowadays, there are many things that can be produced easily by the help of modern technologies. This include the synthetic materials that can be developed by using any advance machine that was manufactured [1]. However, those synthetics materials that was developed may bring harm to the environment. Their particles can be spread resulting an unhealthy atmosphere. Thus, the natural resources was used to produce an authentic materials (Calarge, 2018). In the recent years, textile industry has been developed significantly and contributes to the growth of Malaysia’s economy [2]. It can be categorized as one of the complicated industries among the manufacturing industries such as food, cosmetics and pharmaceutical industries [3]. Thus, the textile industries require high water consumption and resulting on high discharge rate of wastewater that loaded with contaminants [2]. The generation of wastewater from textile industry comes from the manufacturing process of textile fabrics such as washing scouring bleaching, mercerizing, and dyeing and finishing process. The highest amount of wastewater that produced from textile industries come from the process of dyeing and finishing. The contaminants of water that produced by dyeing and finishing process include high suspended solids (SS), chemical oxygen demand (COD), biochemical oxygen demand (BOD), heat, colour, acidity, basicity, and other organic pollutants [4]. This matter has to be seriously concerned as it may lead to allergic responses, eczema, and also affect the liver, lungs, and immune system of humans as well as animals [3]. The purpose for the project of the effects of Lawsonia Inermis was basically to produce a natural pigment that may not harm the environmen

Investigation of dyeing based on pandanus amaryllifolius for superhydrophobic coating in cotton-polyester blended in textile application

Natural dyes are derived from natural resources. Colouring materials obtained from natural resources of plant, animal, mineral, and microbial origins were used for colouration of various textile materials. Use of natural dyes started fall after the invention of synthetic dyes in the second half of the nineteenth century. The synthetic dyes were rapidly industrialization of textile production resulted in almost complete replacement of natural dyes by synthetic dyes because their easy availability simple application process, better fastness properties and consistency of shades [1]. Recent environmental awareness has again revived interest in natural dyes mainly among environmentally conscious people. Natural pigments are considered eco-friendly as these are renewable and biodegradable which is skin friendly and provide healthier benefits to the wearer [2]. Pandanus amaryllifolius also called as pandan leaf is a tropical plant that under screw pine genus and it can be easily found all around in Malaysia. It is a genus monocotyledon plants with over 750 accepted species. Extraction of green pigments from pandanus amaryllifolius to produce an organic pigment for fabric dyeing can become an alternative of synthetic pigments. Organic pigments also can be classified as a biochrome substance which is produced by living organisms. These biological pigments include flower and plant pigments [3]

Design of experiment for in-situ synthesis of waste vegetable oils and synthetic based polyurethane (PU) foam composites

This study focused on fabrication of polyurethane (PU) foams and its composites based on hydroxylated bioepoxy (B) and petroleum based synthetic epoxy (E), crosslinker and wood fillers. The fabrication of foams: B and E with different wood filler size such as flake (L) and powder (P) on different composition ratios of 5%, 10%, 15% and 20%. The fabrication techniques used in this research are open moulding technique. The physical properties such as morphological pore structure and its homogeneity of wood filler distribution in foam polymer composites were measured. The effect of different size of wood filler loading in PU foam composites were analyzed and discussed in detail such as gelling time, main pore size, interconnected pore and struts thickness. The operatory conditions of in-situ PU foams synthesis were optimized using a design of experiment (DOE). The correlations between factors (X1, X2, X3) and the responses (Y1, Y2, Y3, Y4) for B, E as well as BL, BF, EL or EF foams were further analyzed using Minitab software

Superhydrophobic dyeing of orange fruit pigment on cotton knitted textile application

The pigment is the substance that changes the colour of light based on the result of selective colour absorption. Pigments are used for colouring paint, fabric, ink, food, cosmetic and other materials. The materials that chosen and developed by human for use as pigment must have special properties that make them ideal for make them colouring other materials. The pigment must be stable in solid form at ambient temperatures [1]. Pigments can be divided into two groups which is organic pigment and inorganic pigment. For inorganic pigments, the colour is comparatively less bright and these pigments are also seemed to be less rich than the organic pigments. Large amount of inorganic pigments are required to generate desired effects since these pigments have low tinting strength. The most important thing is inorganic pigment contains toxic substances that may be harm to our health and environment. The researchers are started to investigate and use organic pigment into textile application nowadays [2]

Enhancement of graphite functionality in renewable polymer composite properties

The preparation and characterization of composite thin films of renewable polymer graphite (PG) is disclosed. Thin films ~ 0.1 mm thick are prepared using a simple solution mixing with mass proportion of 2/1 (renewable monomer/ Methylene Diphenyl Diisocyanate, MDI), upon differ graphite content (PG0 , PG5 , PG10, PG15, PG20, PG25 and PG30) and drop casting at room temperature. The morphology-structure relations of renewable PG composites with respect to electrical conductivity were diagnosed using Optical microscope (OM), Fourier transform infra-red spectroscopy (FTIR) and Thermogravimetric analysis (TGA). The homogeneous random dispersion and strong interface between the graphite in the classical insulating renewable polymer matrix were observed. Thus resulting of enhancements in thermal stability with slight shift of decomposition temperature and better mechanical properties through the modulus and tensile strength increment up to ~440% and ~100% respectively. The result shows that it can simultaneously leads to renewable PG conductivity (σ) where the percolation threshold occurs at higher graphite content (PG20, PG25 and PG30) of 103 - 104 S/m. Thus, this non-petroleum based renewable polymer graphite composites have remarkably more to offer as conducting polymer composites material in multidisciplinary applications

Spectroscopic studies of oils and its synthesized bio-polymer

Nowadays, the development of alternatives to petroleum based - natural based polymeric materials were grow rapidly due to contemporary challenge attributable to environmental concerns and the effects of fluctuating oil prices.Triglycerides, the primary components of vegetable oils, are an abundant, renewable, and widely investigated as the alternative feedstock for polymeric materials [1], In this study, 3 types of cooking oil was used such as, Virgin Oil (VO), ‘Popia’ Oil (PO), and Mixed Oil (MO) for the synthesis of bio-monomer named as Virgin Oil Monomer (VOM), Popia Oil Monomer (POM) and Mixed Oil Monomer (MOM). These bio-monomers then converted to the bio-polymers named as Virgin Oil Polymer (VOP), Popia Oil Polymer (POP) and Mixed Oil Polymer (MOP). The spectroscopic properties of oils, bio-monomers and bio-polymers were tested using Fourier Transform Infrared Spectroscopy (FTIR). The characteristic peak 3010.65 cm-1 was attributed to the C–H stretching of VO, PO, and MO. The peaks at 3010.65 cm-1 disappear during the epoxidation process and new peak appear around 3330cm-1 – 3450 cm-1 in the VOM, MOM and POM attributed to the hydroxyl groups (O-H). For VOP, MOP, and POP, a strong 3330 cm-1 - 3345 cm-1 absorption band characteristic of the N–H group and an absorption band characteristic of the C=O group centered around 1700 cm-1 are present in all the FTIR spectra. Hence, its shows all types of oils were successfully converted to the bio-monomers and bio-polymers as refer to the absorption band in spectroscopic analysis

Spectroscopic Studies of Oils and Its Synthesized Bio-Polymer / Nurulsaidatulsyida Sulong ...[et al.]

Nowadays, the development of alternatives to petroleum based - natural based polymeric materials were grow rapidly due to contemporary challenge attributable to environmental concerns and the effects of fluctuating oil prices.Triglycerides, the primary components of vegetable oils, are an abundant, renewable, and widely investigated as the alternative feedstock for polymeric materials [1], In this study, 3 types of cooking oil was used such as, Virgin Oil (VO), ‘Popia’ Oil (PO), and Mixed Oil (MO) for the synthesis of bio-monomer named as Virgin Oil Monomer (VOM), Popia Oil Monomer (POM) and Mixed Oil Monomer (MOM). These bio-monomers then converted to the bio-polymers named as Virgin Oil Polymer (VOP), Popia Oil Polymer (POP) and Mixed Oil Polymer (MOP). The spectroscopic properties of oils, bio-monomers and bio-polymers were tested using Fourie