Synthesis, Characterization and Permofarmance Activity of Metal Soap of Calcium, Cobalt, Iron and Copper from Palm Kernel Oil As a Drier in Paint
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Advances in Bioscience and Bioengineering 2016; 4(6): 85-90 http://www.sciencepublishinggroup.com/j/abb doi: 10.11648/j.abb.20160406.14 ISSN: 2330-4154 (Print); ISSN: 2330-4162 (Online) Synthesis, Characterization and Permofarmance Activity of Metal Soap of Calcium, Cobalt, Iron and Copper from Palm Kernel Oil as a Drier in Paint Eluchie Nene Pearl Biotechnology and Energy Research, Ministry of Science and Technology, Umuahia, Nigeria Email address: [email protected], [email protected] To cite this article: Eluchie Nene Pearl. Synthesis, Characterization and Permofarmance Activity of Metal Soap of Calcium, Cobalt, Iron and Copper from Palm Kernel Oil as a Drier in Paint. Advances in Bioscience and Bioengineering. Vol. 4, No. 6, 2016, pp. 85-90. doi: 10.11648/j.abb.20160406.14 Received: October 21, 2016; Accepted: November 12, 2016; Published: December 6, 2016 Abstract: The behavior of Palm Kernel Oil was saponified by potassium hydroxide to form soluble soap which was later reacted with solutions of copper, cobalt, Iron and calcium to produce the metal soaps which were used as drier in coating mixture (Paint). The performance of these metal soaps has been studied. The effect of environmental and corrosive factors on paints was also studied. From the study, the formulated paint samples using metal soap had low specific gravity (1.45-1.47). This is an indication that more metal soap can be incorporated into the paint. Full hardness of paint samples was within the range (0.38-0.41mm) which implies that the samples will have high tolerance to anti-corrosive coating. The paints showed strong adhesion properties that are capable to withstand abrasive and corrosive agents. Also when exposed to surfaces like paper and glass, the exhibited strong adaptability without rust. Considering the drying time of coating mixture (paints) containing metal soaps showed increased oxidizing activity of drier and shortened drying time. The progress of the formulated metal soap paint reaction on storage was monitored and confirmed using physical methods. The high performance of the paints prepared from metal soap is good evidence to justify their utilization as driers in the surface coat industry. Keywords: Palm Kernel Oil, Metal Soap, Saponification, Driers, Synthesis, Metal Soap Paint industrial raw materials from renewable sources. Palm kernel 1. Introduction oils are at the centre of this search as many useful products and Palm kernel oil is an edible plant derived from the kernel of industrial materials have been produced from them. One of oil palm Elaeisguineensis. It is a member of the family such materials is metal carboxylates also referred to as metal Arecaceae (Palm family). Palm kernel oil (triglyceride) like soaps. other nature fats and oil is a chemical compound of one Metallic soaps have been described as alkaline-earth or molecule of glycerol, bound to three molecules of fatty acids. heavy-metal long-chain carboxylates [2], which are insoluble It is a semi solid at room temperature is commonly used in in water, but soluble in non-aqueous solvents. Depending on commercial cooling because of its relatively low cost and can the type of metal salt used, they have been found to form be stored longer than other vegetable oils. emulsion and slurry respectively. They have the general Presently, petrochemicals are gradually being replaced by formula (RCO2)2M, where M is a metal such as Zn, Cd, Pb, Ba, oleo chemical feed stocks in many industrial and domestic Ca, Co, Cu, Al, Fe, etc and R is a linear or branched alkyl applications and this has resulted in an increase in demand for group. Metal soaps are manufactured by using one of the bio-based products and as such recognizing and increasing the following processes: double decomposition, direct reaction of benefits of using renewable materials. Palm kernel oils are carboxylic acid with metal oxides, hydroxides and carbonates important sources of nutritional oils, industrial and and direct reaction of metals with molten fatty acid [3]. These pharmaceutical importance [1], and current emphasis on reactions are usually carried out in an aqueous medium for sustainable development has made it imperative to search for alkaline and alkaline-earth soaps or in an organic medium, 86 Eluchie Nene Pearl: Synthesis, Characterization and Permofarmance Activity of Metal Soap of Calcium, Cobalt, Iron and Copper from Palm Kernel Oil as a Drier in Paint such as alcohol or benzene, for metallic soaps [4], [5]. They complete methylation process. The fatty acid methyl esters are used as additive in so many industrial applications. Metal were thrice extracted from the mixture with redistilled carboxylates have played an important role in the n-hexane. The content was concentrated to 1 ml for gas development of poly vinyl chloride (PVC) an important chromatography analysis, 1 µl of this was injected into the commercial polymer [6]. Other important applications are injection port of GC which was oven programmed with Model found in the manufacture of greases, paints or inks, plastics, HP 6890 powered with HP Chemstation Rev. A 09.01 [1206] cosmetics, textiles, pharmaceuticals, etc, in which they are software equipped with flame ionization detector and a employed as lubricants, driers, catalysts, wetting agents, capillary column HP INNOWax (30 m × 0.25 mm × 0.25 µm) thickening agents, stabilizers, water- proofing agents, to obtain individual peaks of fatty acid methyl esters. The inlet fungicides and pesticides [7], [8]. Many literature sources and detector temperatures were set at 250 and 320°C, have revealed excellent report on the characterization and respectively. Nitrogen gas was used and the split ratio was preparation of metal soap [9], their behavior and properties 20:1 with hydrogen pressure at 22 psi. The fatty acid methyl have been studied extensively [10]. esters peaks were identified by retention times in comparison Therefore, the present work has added to the available with calibration curve of the standards analyzed under the driers beforehand and consequently, they can find uses in paint, same conditions. varnish, printing ink and linoleum industries. The studies on the nature of these soaps are of great importance for their use 2.3. Preparation of Metal Soaps of the Oils in industries and for explaining their characteristics under Metal soaps of copper, cobalt, iron and calcium were different conditions. The physicochemical properties of prepared by methods described by [13]. 50g of palm kernel oil different metallic soaps have been investigated by several (PKO) was heated to 90-95oC in a 50ml beaker and 125cm3 of researchers. Many of the reports on the characterization and 10ml of potassium hydroxide (KOH) emulsified into this thick properties of metal soaps have been carried out on soaps layer with frequent stirring for one hour. After this period, the prepared using pure fatty acids with little attention on their use soap was then washed with cold distilled water to remove an as driers, inspite of their abundance, stability and low cost, as excess alkali. 0.05M solution of the soap was prepared in hot starting materials for the preparation of metal soaps. In order water and added with stirring to an aqueous solution of the to elucidate the drying agents in surface coatings and optimize metal salt (0.15Ml). The metallic soap which precipitated out paint formulations for best cost performance, this work aim to was filtered, washed with distilled water and dried in an air demonstrate the performance of surface coatings (paints) ventilated oven at 40°C for 24 hours. The colours of the prepared by the addition of metal soap as drier. metallic soaps were noted. The amount of driers added represents 0.50 wt. % calcium (ca), 0.50 wt. % copper (cu), 2. Materials and Methods 0.50 wt. % iron (Fe) and 0.05 wt. % cobalt (Co). These amounts of metals represent those normally used in the Potassium hydroxide, Ca (NO3)2.2H2O, Co (NO3)2, surface coatings industry [13]. The amount of driers giving the CuSO4.6H2O, and FeSO4, petroleum spirit, ethanol, sulphuric above percentage of metals in the paint-drier mixtures was acid and hydrochloric acid were obtained from BDH Chemicals, calculated as follows: England as analytical grade chemicals and used as received. Amount of drier required 2.1. Chemical Analysis of Palm Kernel Oil . % = % Palm kernel seeds (50g) were placed in a stoppered container with 1 L n-hexane and allowed to stand at room temperature for 2.4. Property Determination on Prepared Metal Soap Paint a period of 24 h with frequent agitation. The mixture was Samples strained, the damp solid material pressed, and returned into the The properties of the formulated metal soap paint were container. The process was repeated for 7 days to ensure determined by methods described by [14]. The American complete extraction. The oil was concentrated by simple standard testing methods (ASTM) was used to evaluate the distillation which gave 62 and 54% yield for TP and HC oils, prepared alkyd paint samples for viscosity (ASTM D respectively. The extracted oil was analyzed for its iodine, 1200-10), specific gravity (ASTM D 1475-13), adherence to saponification, and acid values using the methods described by surface (ASTM D 6677-07, 2012), settling and skinning the Association of Official Analytical Chemists [11]. tendencies (ASTM D 869-85). The settling tendencies of the 2.2. Fatty Acid Composition of the Oil samples were rated in accordance to the degree of settling on a scale that range from 10 to 0 (Table 4). Intermediate Fatty acid methyl esters of the oils were prepared by conditions were given appropriate odd numbers. The Nigerian saponification according to methods described by [12]. 50 mg Industrial Standard (NIS) procedure was used to study the of the fat contents was mixed for 5 min at 95°C with 3.4 ml of mildew formation resistance (NIS 278:1990), media the 0.5 M KOH in dry methanol.