Procedia Chemistry最新文献_第2页

Properties of Fiberglass/MWCNT Buckypaper/Epoxy Laminated Composites 玻璃纤维/MWCNT巴克纸/环氧层压复合材料的性能

Procedia Chemistry Pub Date : 2016-01-01 DOI: 10.1016/J.PROCHE.2016.03.138

W. W. Dalina, S. Tan, M. Mariatti

引用次数: 8

The Effect of 3-aminopropyltrimethyoxysilane (AMEO) as a Coupling Agent on Curing and Mechanical Properties of Natural Rubber/Palm Kernel Shell Powder Composites 偶联剂3-氨基丙基三甲基氧基硅烷(AMEO)对天然橡胶/棕榈仁壳粉复合材料固化及力学性能的影响

Procedia Chemistry Pub Date : 2016-01-01 DOI: 10.1016/j.proche.2016.03.019

Shuhairiah Daud, Hanafi Ismail, Azhar Abu Bakar

{"title":"The Effect of 3-aminopropyltrimethyoxysilane (AMEO) as a Coupling Agent on Curing and Mechanical Properties of Natural Rubber/Palm Kernel Shell Powder Composites","authors":"Shuhairiah Daud, Hanafi Ismail, Azhar Abu Bakar","doi":"10.1016/j.proche.2016.03.019","DOIUrl":"10.1016/j.proche.2016.03.019","url":null,"abstract":"<div><p>This research is conducted using palm kernel shell powder (PKS) as filler in natural rubber The effect of 3-aminopropyltrimethoxysilane as coupling agent on composites were studied at different palm kernel shell loading i.e, 0 5, 10, 15 and 20 phr The palm kernel shell was crushed and sieved to an average particle size of 5.53μm The palm kernel shell filled natural rubber composites were prepared using laboratory size two roll mill The curing characteristics such as scorch time, cure time and maximum torque were obtained from rheometer The palm kernel shell powder filled natural rubber composites were cured at 150<sup>o</sup>C using hot press according to their cure time Curing characteristics, tensile properties, rubber-filler interaction and morphological properties of palm kernel shell powder filled natural rubber were studied Scorch time and cure time show reduction but tensile strength, elongation at break, modulus at 100% (M100) and modulus at 300% (M300) increased with the presence of 3-aminopropyltrimethyloxysilane Rubber-filler interaction studies showed that rubber filler interaction in natural rubber filled with palm kernel shell powder improved with incorporation of 3-aminopropyltrimethyoxysilane.</p></div>","PeriodicalId":20431,"journal":{"name":"Procedia Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.proche.2016.03.019","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88399514","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 13

Corrosion Behavior of Corroded Sn–3.0Ag–0.5Cu Solder Alloy 腐蚀Sn-3.0Ag-0.5Cu钎料合金的腐蚀行为

Procedia Chemistry Pub Date : 2016-01-01 DOI: 10.1016/J.PROCHE.2016.03.112

C. W. See, Muhamad Zamri Yahaya, Habsah Haliman, A. A. Mohamad

引用次数: 20

Application of Cassava Peel and Waste as Raw Materials for Xylooligosaccharide Production Using Endoxylanase from Bacillus subtilis of Soil Termite Abdomen 利用土壤白蚁腹部枯草芽孢杆菌内生聚糖酶生产低聚木糖的研究

Procedia Chemistry Pub Date : 2016-01-01 DOI: 10.1016/j.proche.2016.01.007

Anak Agung Istri Ratnadewi , Agung Budi Santoso , Erma Sulistyaningsih , Wuryanti Handayani

{"title":"Application of Cassava Peel and Waste as Raw Materials for Xylooligosaccharide Production Using Endoxylanase from Bacillus subtilis of Soil Termite Abdomen","authors":"Anak Agung Istri Ratnadewi , Agung Budi Santoso , Erma Sulistyaningsih , Wuryanti Handayani","doi":"10.1016/j.proche.2016.01.007","DOIUrl":"10.1016/j.proche.2016.01.007","url":null,"abstract":"<div><p>Xylooligosaccharides (XOS) are the sugars produced from xylan hydrolysis. XOS have a prebiotic characteristic by promoting the growth of probiotic microorganisms. Xylan containing agriculture wastes <em>e.g.</em> rice straw, sugarcane bagasse, corncobs, cassava peel and waste can be used to produce XOS by a consecutive process of alkali-pretreatment and enzymatic hydrolysis. In this study, we focused on enzymatic production of XOS from cassava peel and waste, which is a low cost material with a relatively high xylan content. The dried cassava peel and waste were ground and sieved to be <100 mesh size, and were then subjected to pretreatment with 0.5% (w/v) sodium hypochlorite solution for 5h to remove the lignin in the sample. In the next stage, the xylan was extracted by soaking in 10% sodium hydroxide (NaOH) for 24h, followed by adjusting the pH to pH 7 by adding 5% (w/v) hydrochloric acid (HCl). Next, after centrifugation, the obtained filtrate was precipitated with ethanol (ratio 1:3) and dried at 80°C for 48h. The NaOH pretreatment enabled almost 4.83% and 6.23% recovery of the xylan that was present in the cassava peel and waste. Next, the xylan from cassava peel and waste was hydrolyzed using endoxylanase (2.21 U/mL) from <em>Bacillus subtilis</em> of soil termite abdomen at pH 5 and 50°C for 15h. Analysis by TLC showed the production of XOS, with especially X5 as the major band. HPLC chromatography confirmed that the most abundant product was indeed X5. X3 and X4 were also found but no X2. The results were not so different from the hydrolysis of xylan from oat spelt xylan, but showed a relatively lower yield.</p></div>","PeriodicalId":20431,"journal":{"name":"Procedia Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.proche.2016.01.007","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80703070","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 18

Preparation and Characterization of Microwave-absorption of Sarulla North Sumatra Zeolite and Ferric Oxide-filled Polyurethane Nanocomposites 北苏门答腊沸石与氧化铁填充聚氨酯纳米复合材料的制备及微波吸收特性研究

Procedia Chemistry Pub Date : 2016-01-01 DOI: 10.1016/j.proche.2016.03.036

Golfrid Gultom , Basuki Wirjosentono , Kerista Sebayang , Masno Ginting

{"title":"Preparation and Characterization of Microwave-absorption of Sarulla North Sumatra Zeolite and Ferric Oxide-filled Polyurethane Nanocomposites","authors":"Golfrid Gultom , Basuki Wirjosentono , Kerista Sebayang , Masno Ginting","doi":"10.1016/j.proche.2016.03.036","DOIUrl":"10.1016/j.proche.2016.03.036","url":null,"abstract":"<div><p>Microwave-absorptive polymeric composite materials are becoming important to protect interference of any communication systems due to the increase in the use of microwave-inducing devices. In this work, the microwave-absorptive polyurethane composites are prepared using natural zeolites of Sarulla North Sumatra and commercial ferric-oxide as fillers. Weight ratio of the natural zeolite to ferric oxide were varied (18:2; 16:4; 14:6; 12:8 and 10:10) by weight. The fillers are prepared using ball milling technique and characterized using Particle Size Analyzer for particle size distribution. The nanocomposites, prepared using in-situ reaction of polyethylene glycol and toluene diisocyanate, is characterized for physical and mechanical properties using tensile strength, thermal properties with TGA techniques, as well as morphological and chemical properties using scanning electron microscopy. Composition and loading of the nanofillers against polyurethane matrices is 20% by weight. Microwave-absorption properties of the nanocomposites is characterized using 8-12GHz frequency. Tensile strengths of the natural zeolite-ferric oxides polyurethane nanocomposites shows higher values when matrices filled with lower ferric-oxide, which could be due to the nanozeolites have functioned as reinforcement for the polyurethane matrix through polar-polar interaction between the filler surfaces with the matrices. The microwave absorption properties, which investigated by Vector Network Analyzer, of the nanocomposites filled in polyurethane with the ratio of nanozeolite to ferric oxide filler of 12:8 shows reflection loss of – 13.2dB. This condition was observed at 11.1GHz.</p></div>","PeriodicalId":20431,"journal":{"name":"Procedia Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.proche.2016.03.036","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81056022","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6

Elimination of SCMV (Sugarcane Mozaik Virus) and Rapid Propagation of Virus-free Sugarcane (Saccharum officinarum L.) Using Somatic Embryogenesis 甘蔗莫扎克病毒(SCMV)的消灭及脱毒甘蔗的快速繁殖利用体细胞胚胎发生

Procedia Chemistry Pub Date : 2016-01-01 DOI: 10.1016/j.proche.2016.01.016

Parawita Dewanti , Laily Ilman Widuri , Choirul Ainiyati , Purnama Okviandari , Maisaro , Bambang Sugiharto

{"title":"Elimination of SCMV (Sugarcane Mozaik Virus) and Rapid Propagation of Virus-free Sugarcane (Saccharum officinarum L.) Using Somatic Embryogenesis","authors":"Parawita Dewanti , Laily Ilman Widuri , Choirul Ainiyati , Purnama Okviandari , Maisaro , Bambang Sugiharto","doi":"10.1016/j.proche.2016.01.016","DOIUrl":"10.1016/j.proche.2016.01.016","url":null,"abstract":"<div><p>The use of apical buds and in-vitro shoot for elimination of SCMV and shoot proliferation in sugarcane was assessed. The purpose of this research was to determine the level of virus elimination and to obtain virus-free sugarcane. Research were using explants of apical buds and in vitro shoots of sugarcane PS-881 cultured on MS medium supplemented with antiviral acyclovir and ribavirin consisted of 0, 20 and 40mg l<sup>-1</sup> with incubation duration 4, 5 and 6 weeks. Elimination of virus-free plantlets was detected by DAS-ELISA and RT-PCR. The results showed that the detection of RT-PCR using apical explants treated with acyclovir 40mg l<sup>-1</sup> for 6 weeks was not effective to eliminate SCMV, while the use of in vitro shoot explants treated with 40mg l<sup>-1</sup> of acyclovir or 40mg l<sup>-1</sup> ribavirin eliminated the SCMV for about 100% resulting virus-free sugarcane plantlets. Sugarcane virus-free propagated through somatic embryogenesis on five different induction mediums. Callus induction and proliferation through somatic embryogenesis were obtained on MS nutrient medium with the addition of 3mg l<sup>-1</sup> 2,4-D + 1.5mg l<sup>-1</sup> BAP. The result of regeneration produced ± 11 virus-free plantlets within 8 weeks.</p></div>","PeriodicalId":20431,"journal":{"name":"Procedia Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.proche.2016.01.016","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88201640","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 9

Bioflotation: Bacteria-Mineral Interaction for Eco-friendly and Sustainable Mineral Processing 生物浮选:细菌-矿物相互作用，实现生态友好和可持续的矿物加工☆

Procedia Chemistry Pub Date : 2016-01-01 DOI: 10.1016/j.proche.2016.03.068

Edy Sanwani , SitiKhodijah Chaerun , RiriaZendy Mirahati , Tri Wahyuningsih

{"title":"Bioflotation: Bacteria-Mineral Interaction for Eco-friendly and Sustainable Mineral Processing","authors":"Edy Sanwani , SitiKhodijah Chaerun , RiriaZendy Mirahati , Tri Wahyuningsih","doi":"10.1016/j.proche.2016.03.068","DOIUrl":"10.1016/j.proche.2016.03.068","url":null,"abstract":"<div><p>In the current study, the action of two bacteria capable of producing biosurfactants and oxidizing iron (Fe) and sulfur (S), namely <em>Bacillus pumilus</em> SKC-2 and <em>Alicyclobacillus ferrooxydans</em> SKC/SAA-2, was investigated with respect to their ability in possessing dual-function as either bio-collector or depressant for the development of sulfide bioflotation processes. Both bacterial strains were able to produce high amounts of biosurfactants interacted with pyrite that had an important role in their adhesion on the surface of pyrite as well as the change of pyrite surface properties. Over the course of the experiments, the pH of the solutions gradually decreased to ∼3, indicating the active oxidation of pyrite minerals by bacteria. The growth of both bacterial strains resulted in the generation of biosurfactants as represented by the decrease of the surface tension of the solutions and the increase of the contact angle of the pyrite surfaces as a function of time. However, the contact angle of pyrite surfaces gradually decreased after 5 days of incubation until the experiments terminated on 30 days. Scanning electron microscopy equipped with energy dispersive X-ray spectroscopy (SEM-EDS) and Fourier transform Infrared (FTIR) analyses also confirmed the role of both bacterial strains in changing the pyrite surface properties to be more hydrophobic or more hydrophilic depending on the time of incubation. These results indicate that the changes of pyrite surface properties are clearly as the results of bacterial action, likely serving as both bio-collector or bio-frother and depressant that would be very applicable for flotation processes. These results increase our knowledge on the interactions in pyrite-bacteria complexes and could potentially be a very useful result with real exploitable value for those working on sulfide bioflotation processes.</p></div>","PeriodicalId":20431,"journal":{"name":"Procedia Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.proche.2016.03.068","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91089619","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 28

Immobilization of Bromocresol Purple in Inorganic-Organic Sol-Gel Thin Film with Presence of Anionic and Non-ionic Surfactants 阴离子和非离子表面活性剂在无机-有机溶胶-凝胶薄膜上的固定化溴甲酚紫

Procedia Chemistry Pub Date : 2016-01-01 DOI: 10.1016/j.proche.2016.03.007

Mohd Nasha’ain Nordin, Nuruzatulifah Asari, Ahmad Aswad Mahaidin, Khairuldin MohdI Sha, Nik Mohd Azmi Nik Abdul Aziz

{"title":"Immobilization of Bromocresol Purple in Inorganic-Organic Sol-Gel Thin Film with Presence of Anionic and Non-ionic Surfactants","authors":"Mohd Nasha’ain Nordin, Nuruzatulifah Asari, Ahmad Aswad Mahaidin, Khairuldin MohdI Sha, Nik Mohd Azmi Nik Abdul Aziz","doi":"10.1016/j.proche.2016.03.007","DOIUrl":"10.1016/j.proche.2016.03.007","url":null,"abstract":"<div><p>Sol-gel materials known as organically modified silicates (ORMOSILs) offer interesting features such as chemical and mechanical stability. In this paper VTES (vinyltriethoxysilane) and TEOS (tetraalkoxysilane) are mixed in 3:1 ratio. Sol-gel solution was prepared by hydrolysis process of precursors by using ethanol as solvent. After a while a pH-sensitive indicator bromocresol purple (BCP) and surfactant were incorporate into the sol-gel mixture. The percentage of sodium dodecyl sulfate (SDS) and polyethylene glycol (PEG) which act as surfactant were varied to observe the effect of improving host material's nanostructure as well as the interaction between BCP and sol-gel matrices. The absorption peak of the BCP dye changed significantly in the presence of surfactant compared to pure VTES: TEOS mixture (control) in the range of 400 to 450nm. The presence of BCP dye in the sol-gel mixture can be determined via FTIR spectrum with a =C–H stretch in aromatics observed at 3100-3000 cm<sup>-1</sup> which represented the aromatic of the BCP structure. The addition of BCP and surfactant had influenced the FTIR spectra of VTES: TEOS sol-gel materials. Addition of an anionic surfactant to the sol-gel mixtures was found to increase the BCP dye and the sol-gel matrices interaction, thus reducing the dye's tendency to leach. This work shows that sol-gel derived matrices yield dyes with sufficient rigid environment and addition of the surfactant helps to improve the interaction of filler matrices. The anionic SDS shows better leaching resistant compared to non-ionic PEG surfactant. Results of this study offer an attractive possibility to optimize the doped sol gel matrices to be used as sensing material in aqueous condition.</p></div>","PeriodicalId":20431,"journal":{"name":"Procedia Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.proche.2016.03.007","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89509195","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 8

The Effect of Acrylic Acid on Tensile and Morphology Properties of Wollastonite Filled High Density Polyethylene/Natural Rubber Composites 丙烯酸对硅灰石填充高密度聚乙烯/天然橡胶复合材料拉伸性能和形貌的影响

Procedia Chemistry Pub Date : 2016-01-01 DOI: 10.1016/j.proche.2016.03.030

I. Yuhaida , H. Salmah , I. Hanafi , Z. Firuz

{"title":"The Effect of Acrylic Acid on Tensile and Morphology Properties of Wollastonite Filled High Density Polyethylene/Natural Rubber Composites","authors":"I. Yuhaida , H. Salmah , I. Hanafi , Z. Firuz","doi":"10.1016/j.proche.2016.03.030","DOIUrl":"10.1016/j.proche.2016.03.030","url":null,"abstract":"<div><p>Inorganic filler manufactured for incorporation into thermoplastic elastomers usually are surface treated with organic reagents in order to improve the interfacial adhesion between filler and the matrix. In the present paper, the effects of acrylic acid (AA) on tensile and morphology properties of wollastonite (WS) filled high density polyethylene (HDPE)/Natural Rubber (NR) composites were studied. The untreated and treated HDPE/NR/WS composites were melt-blending at 180°C with rotor speed of 50rpm for 10minutes. The composites were tensile-tested according to ASTM D638 and the etched surfaces were observed using scanning electron microscope (SEM). Tensile strength and elongation at break of the compositesdecreased upon the addition of wollastonite, but Young's modulus improves. The results of this study showed that the treated composites are found to have better tensile properties than the untreated composites. The morphology of treated composite showed better interfacial interaction between HDPE/NR and wollastonite.</p></div>","PeriodicalId":20431,"journal":{"name":"Procedia Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.proche.2016.03.030","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89875167","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Properties of Ce-doped Bi0.5Na0.5TiO3 Synthesized using the Soft Combustion Method 软燃烧法合成掺铈Bi0.5Na0.5TiO3的性能

Procedia Chemistry Pub Date : 2016-01-01 DOI: 10.1016/J.PROCHE.2016.03.107

K. A. Razak, W. C. Song, C. Y. Ng

引用次数: 12