Materials Literature
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This research studied the mechanical properties including thermal and UV stability of the modified acrylic sheet containing graft copolymer of poly(methyl methacrylate-co-styrene) on EPDM (GEPDM) synthesized via solution polymerization. The modified acrylic sheet (methyl methacrylate/styrene = 80/20 wt%) was prepared…
In this research, synthesis of porphyrinic compounds and investigation of their electrochemical and photophysical properties are described. Three novel porphyrinic compounds were synthesized by a copper-free Sonogashira coupling reaction between tris(4-iodophenyl)amine and 5,10,15-triphenyl-20-(4-ethynylphenyl)porphyr…
The properties of La₂-xCaxNi₁-yCoy(Ga, Ti)zO₄+d (x = 0.0-1.0, y = 0.1-0.2, z = 0.00-0.1, 0.2) cathode materials for solid oxide fuel cell were studied. It was found that the K₂NiF₄-type perovskite structure synthesized by the modified citrate method was obtained from La₂Ni₁-yCoyO₄+d (y = 0.1-0.2) calcined and sintered…
Silk fibroin solutions are prepared using alkaline solution (LiBr, NaOH and KOH) by dissolving silk fibers from waste fabric industry or local community silk industry. From the experiment, it was found that the optimal silk fibroin solution can be prepared from 2 g (2% w/v) of silk fibroin fiber dissolved in 0.35 M Na…
This research work deals with development of a paper-based polydiacetylene (PDA) sensor array for detecton and discrimination of volatile organic compounds (VOCs). The sensor array is generated from a combination of eight structurally diversed diacetylene (DA) monomers. 10,12-pentacosadiynoic acid (PCDA) and 10,12-tri…
The synthesis of a novel class of diacetylene lipid monomers containing amido or carboxyl head groups with various length methylene spacer (n = 2,3,4) between carbonyl group was accomplished by condensation of 10,12-pentacosadiynamine with various diacids or their cyclic anhydride derivatives. The polymerization and c…
The complexes of metal-amine [M(en)₂ and M(trien)] and metal-amine-salicylate [M(en)₂Sal₂ and M(trien)Sal₂], where M = Cu and Mn, were synthesized. The metal complexes were used as the catalysts in the preparation of rigid polyurethane foams. The reaction times, physical and mechanical properties of the prepared foams…
Cuttlebone is an important biomass which can be incorporated in natural rubber (NR) as a reinforcing filler. The main composition in cuttlebone particles was inorganic calcium carbonate (CaCO₃) about 89 – 94 % and the remained contents were protein (3 - 7 %) and chitin (3 - 4 %). The obtained chitin extracted from cut…
The preparation of natural fabric/castor oil polyurethane sandwich composites and laminated sheet was investigated aiming for synthetic fabric replacement. The natural fabric gave the reinforcement of sandwich composites which the castor oil polyurethane was required as an adhesive. In this work, the natural fiber/cas…
Three ethylene glycol esters and one ethanolamide derivatives of 10,12-pentacosadiynoic acid (PCDA) were synthesized and studied as a modulator for poly(PCDA) sensor. Ethylene glycol (EG-PCDA), triethylene glycol (3EG-PCDA) and pentaethylene glycol esters (5EG-PCDA) were synthesized by simple acid catalyzed esterifica…
This research was able to prepare double barrier controlled release system consisting of a polymeric barrier through chitosan’s derivation (N-succinylchitosan) and a chemical barrier through aldehyde’s derivation (Schiff base) under heterogeneous phase reaction. N-succinylchitosan was synthesized based on the reaction…
This thesis studied on the improving of fire resistance of cotton and silk fabrics which were carried out by radio frequency inductively couple plasma induced graft copolymerization of phosphorus-containing monomer, namely 2-methacryloyloxyethyl diphenyl phosphate (MEDP) and 2-methacryloyloxyethyl phenyl benzenephosph…
The substitution of Ca²⁺ and La³⁺ ions at A-site and the addition of Ca²⁺, Cu²⁺ and Zn²⁺ ions in the structure of Ba₀.₅Sr₀.₅Co₀.₈Fe₀.₂O₃-δ (BSCF) were successfully performed by the modified citrate method. The characterization by XRD and SEM demonstrated that all samples showed the single phase of cubic ABO₃ perovskit…
A new polymer-supported IBX was prepared in this research to use as an oxidizing agent in the oxidation reaction of glycerol. The appropriate method for the synthesis of polymer-supported IBX consisted of 8 steps using p-toluic acid as a starting material for IBX and aminomethyl polystyrene as a supporting material. F…
We have fabricated strain gauges from dielectric materials, barium titanate (BaTiO₃) and barium strontium titanate (BaSrTiO₃), depositing on flexible borosilicate glasses substrates using a sol-gel method. The coplanar capacitors were patterned on the surface of the films using a DC sputtering technique. The measureme…
The objective of this study was to evaluate the corrosion resistance of four types of dental alloys: Au-Pd, Ag-Pd, Ni-Cr and Cu-Al alloys covered by two different dental cements using immersion test in acidic solution. The alloys were cast into ten disc-shaped specimens (5.0 mm diameter and 0.8 mm thick). Each alloy w…
วัตถุประสงค์ของการทดลองในห้องปฏิบัติการครั้งนี้เพื่อศึกษาผลของสารปรับสภาพผิวเซอร์โคเนียสามชนิด ที่มีต่อค่ากำลังแรงยึดดึงของการเชื่อมติดระหว่างสารยึดเรซินและผิวหน้าเซอร์โคเนียที่ขัดเรียบ การศึกษานี้ได้ทำการเตรียมแผ่นเซอร์โคเนียขึ้นและเชื่อมติดกับแท่งเรซินคอมโพสิต โดยแบ่งชิ้นงานเป็น 4 กลุ่มๆ ละ 15 ชิ้น โดยมีกลุ่มที่ไม่ไ…
รายงานวิจัยฉบับนี้ครอบคลุมเนื้อหาการวิจัยในปีที่ 1 ของโครงการ “การเตรียมแผ่นฟิล์ม ไฮโดรเจลที่มีอนุภาคเงินนาโน” ซึ่งเป็นโครงการวิจัยต่อเนื่อง 2 ปี ที่มีเป้าหมายของโครงการในการเตรียมไฮโดรเจลที่มีสมบัติยับยั้งเชื้อจุลินทรีย์สำหรับการนำไปพัฒนาสู่การใช้งานด้านแผ่นปิดแผล สำหรับการดำเนินงานในโครงการปีที่ 1 จะมุ่งเน้นทำการศึก…
This research evaluates the use of natural fiber in polyamide-6 composites aiming to synthetic fiber replacement. The application of natural fiber as reinforcement in composite materials requires a strong adhesion between fiber and the synthetic matrix. In this work, the surface treatments were mercerization and apply…
This research was aimed to develop an active film from chitosan film incorporated with green tea extract to enhance antioxidant and antimicrobial properties in order to be used for food shelf life extension. The experiments were divided into 3 parts. Firstly, chitosan-based film preparation and modification were deter…