Scientific Research Journal最新文献_第2页

Comparative Study of Mechanical and Physical Properties of Rice Husk Filled Polyethylene Waste Composites 稻壳填充聚乙烯废弃物复合材料力学与物理性能的比较研究

Scientific Research Journal Pub Date : 2023-09-21 DOI: 10.24191/srj.v20i2.23506

Siti Nor Din

{"title":"Comparative Study of Mechanical and Physical Properties of Rice Husk Filled Polyethylene Waste Composites","authors":"Siti Nor Din","doi":"10.24191/srj.v20i2.23506","DOIUrl":"https://doi.org/10.24191/srj.v20i2.23506","url":null,"abstract":"Polyethylene (PE), a type of plastic, is utilized extensively in many different applications and has become a significant part of our daily life. However, numerous plastic product manufactures have a significant environmental impact. As a result, several approaches have been investigated in order to reduce waste disposal issues. Rice husk (RH), on the other hand, is a form of agricultural waste that contains lignocellulosic fiber that can be used as a filler in polymer composites. As a result, combining both PE waste and RH fiber could be a viable option for saving our world. The objective of this study was to ascertain the impact of different RH fiber loadings, including 5, 10, 15, 20, and 25 %, on the mechanical and physical characteristics of composites manufactured from used HDPE and LDPE materials. Due to inadequate bonding between the hydrophilic fiber and the hydrophobic polymer matrix, it was discovered that increasing the filler loading lowered the tensile strength, elongation at break, and impact strength of the composites. In comparison to RH/HDPE, the tensile strength of RH/LDPE composites showed a greater decline at 45 % at the highest loading of 25 % RH fiber. Both composites showed a 98–99 % decrease in elongation at break as a result of constrained chain elongation and mobility. Additionally, the impact strength value of RH/HDPE waste composites decreased by 43 % compared to 31 % for RH/LDPE waste composites. In contrast, the inclusion of fillers improved the modulus and density of the composites substantially. While the trends for RH/HDPE and RH/LDPE composites are similar, RH/HDPE waste composites demonstrated superior mechanical characteristics than RH/LDPE waste composites.","PeriodicalId":21751,"journal":{"name":"Scientific Research Journal","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136238650","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Evaluation of the Moisture Management, Air and Water Vapour Permeabilities of Knitted Fabrics for Garments 服装用针织织物的水分管理、空气和水蒸气渗透性的评价

Scientific Research Journal Pub Date : 2023-09-21 DOI: 10.24191/srj.v20i2.21920

Mohd Rozi Ahmad

引用次数: 0

Characterization and Properties of Durian Skin Fiber Filled Polylactic Acid/Polypropylene Compatibilized with Glut Palmitate Salt 棕榈酸盐增容聚乳酸/聚丙烯填充榴莲皮纤维的表征及性能研究

Scientific Research Journal Pub Date : 2023-09-21 DOI: 10.24191/srj.v20i2.21016

Sarina Mohamad

{"title":"Characterization and Properties of Durian Skin Fiber Filled Polylactic Acid/Polypropylene Compatibilized with Glut Palmitate Salt","authors":"Sarina Mohamad","doi":"10.24191/srj.v20i2.21016","DOIUrl":"https://doi.org/10.24191/srj.v20i2.21016","url":null,"abstract":"PLA matrix provides good mechanical, physical and degradability properties, but somehow PLA alone is not good enough to produce a product as PLA has poor toughness resulting a brittle material. Natural fiber such as Durian skin fiber (DSF) can be incorporated into PLA/PP as a biopolymer to achieve the desired properties and better degradation which resulting a good bio-composite. Therefore, the study was carried out to produce bio-composite of DSF filled with PLA/PP and glut palmitate (GP) salt as compatibilizer. The bio-composites was successfully developed using different filler (DSF) loadings (0 php, 15 php, 30 php, 45 php and 60 php) with melt mixing blending. The FTIR analysis showed the new peak existed at 1595 cm-1 revealed a good interaction in the composite system which come from the bending of NH2 vibration from GP. The mechanical properties (tensile properties) and physical properties (water absorption ability and density) of prepared bio-composite were determined. Increasing of DSF filler loading to 60 php DSF in PLA/PP bio-composite with the addition of GP increased in tensile strength (5.06 ± 0.09 MPa) and elongation at break (3.74 ± 0.18%) due to enhanced interfacial bonding and strong adhesion between the polymer matrix and the filler due to the presence of compatibilizer. However, increased filler loading to 60 php DSF, showed a decreasing trend in the tensile modulus which represents high flexibility of the bio-composites. Furthermore, PLA/PP/DSF bio-composites absorption of water increases with the increasing filler loading until it reaches at saturation point. The study concludes that the DSF reinforced PLA/PP with the addition of GP was suitable to be used in the production of bioplastic by many industries which can promote a sustainable environment for society.","PeriodicalId":21751,"journal":{"name":"Scientific Research Journal","volume":"72 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136238656","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Revival of Ferromagnetic-Metallic Phase and Emergence of Griffiths Phase via Ni and Cr Substitution in Charged-Ordered Pr0.75Na0.25MnO3 Manganite 带电有序Pr0.75Na0.25MnO3锰矿中Ni和Cr取代铁磁金属相的还原和Griffiths相的出现

Scientific Research Journal Pub Date : 2023-09-21 DOI: 10.24191/srj.v20i2.22185

Rozilah Rajmi

{"title":"Revival of Ferromagnetic-Metallic Phase and Emergence of Griffiths Phase via Ni and Cr Substitution in Charged-Ordered Pr0.75Na0.25MnO3 Manganite","authors":"Rozilah Rajmi","doi":"10.24191/srj.v20i2.22185","DOIUrl":"https://doi.org/10.24191/srj.v20i2.22185","url":null,"abstract":"Polycrystalline samples of Pr0.75Na0.25Mn1-xAxO3 (A = Ni, Cr; x = 0, 0.03) were prepared using conventional solid-state method and their structural and magnetic properties were investigated. Monovalent-doped Pr0.75Na0.25MnO3 exhibits insulating behavior which is related to the strong localization of charge carriers due to the presence of charge ordering (CO). The substitution of different types of magnetic ions, A, which are Ni2+ and Cr3+, at a concentration of x = 0.03 at the Mn site in the CO Pr0.75Na0.25Mn1-xAxO3 manganite, has been found to dramatically modify its structural and magnetic properties. X-ray diffraction patterns showed that all samples were present in single phase and crystallized in orthorhombic structure with Pnma space group. The Rietveld refinement analysis showed that the unit cell volume increased due to Ni2+ substitution, while it decreased due to Cr3+ substitution, which may be attributed to the different ionic radii of both ions. The suppression of the CO state and the induction of the ferromagnetic-metallic state in the Ni-substituted and Cr-substituted samples are suggested to be due to the induction of double-exchange interaction involving Ni2+–O–Mn4+ and Mn3+–O–Cr3+, respectively. The variation in magnetic properties between the Ni-substituted and Cr-substituted samples is suggested to be due to the existence of different strengths of ferromagnetic interaction between Ni2+–O–Mn4+ and Mn3+–O–Cr3+. In addition, the deviation of the temperature dependence of the inverse magnetic susceptibility curves from the Curie-Weiss law suggests the existence of Griffith’s phase-like behaviour for both substitution samples. The Ni-substituted sample induced a greater GP effect than the Cr-substituted sample due to the larger difference of TC and TG value (TC-TG).","PeriodicalId":21751,"journal":{"name":"Scientific Research Journal","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136238657","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The Effect of Superplasticizer (SP) on the Workability and Skid Resistance of Geopolymer Concrete (GPC) Containing High Calcium Precursor (HCP) 高效减水剂(SP)对含高钙前驱体(HCP)地聚合物混凝土(GPC)和易性和抗滑性的影响

Scientific Research Journal Pub Date : 2023-09-21 DOI: 10.24191/srj.v20i2.22141

Nazirah Mohd Apandi

{"title":"The Effect of Superplasticizer (SP) on the Workability and Skid Resistance of Geopolymer Concrete (GPC) Containing High Calcium Precursor (HCP)","authors":"Nazirah Mohd Apandi","doi":"10.24191/srj.v20i2.22141","DOIUrl":"https://doi.org/10.24191/srj.v20i2.22141","url":null,"abstract":"A superplasticizer (SP) is one of the admixtures that may be used to improve the workability of concrete. However, its effects on geopolymer concrete (GPC) have yet to be well known or published, especially regarding its skid resistance and workability performance. This research aims to study the impact of the superplasticizer on the skid resistance and workability of geopolymer concrete containing high calcium precursor (HCP) in different proportions of SP, which are 0, 0.5, 1.0, 1.5 and 2.0 % by the weight of the HCP. Seven mix designs were produced: 1 conventional concrete mix, 5 geopolymers concrete mix, and 1 bituminous cold-mix asphalt mix. Slump flow and skid resistance tests were performed in this study. A skid resistance test is achieved using a British Pendulum Tester (BPT) on a 220 mm x 220 mm x 50 mm rectangle. This study found that the effect of SP on skid resistance is insignificant. However, the skid resistance of all GPC mix designs is higher than CC and asphalt mix. The workable flow of geopolymer concrete containing HCP and 0 - 2 % SP was 118-123 mm. However, less than 2 % of SP is given an insignificant difference. The optimum mix design of GPC is mix design GPC with an added 2 % SP (M6) that gives a high workability compared to other GPC mix designs and good skid resistance of 95 BPN. This study also found that workability correlates with skid resistance. The higher the spreading width value, the smaller the skid resistance value. In other words, the higher the flowability value, the less rough the sample surface. Hypothetically, the higher the percentage of SP, the higher the workability and the lower the skid resistance.","PeriodicalId":21751,"journal":{"name":"Scientific Research Journal","volume":"143 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136238655","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Extraction of Phytochemical from Murraya Koenigii (L.) Spreng Leaves using Maceration Method 锦葵中植物化学成分的提取用浸渍法洗嫩叶

Scientific Research Journal Pub Date : 2023-09-21 DOI: 10.24191/srj.v20i2.23459

Saliza Asman

引用次数: 0

Dual-axis Solar Energy Tracking and Monitoring System with Arduino as a Microcontroller 以Arduino为微控制器的双轴太阳能跟踪监测系统

Scientific Research Journal Pub Date : 2023-09-21 DOI: 10.24191/srj.v20i2.22365

Mohd Sufian Ramli

引用次数: 0

Effect of High Calcium Precursor (HCP) Content on Bonding Strength of Geopolymer Concrete Exposed at Different Curing Temperatures 高钙原体(HCP)含量对不同养护温度下地聚合物混凝土粘结强度的影响

Scientific Research Journal Pub Date : 2023-09-21 DOI: 10.24191/srj.v20i2.22142

Warid Wazien Ahmad Zailani

{"title":"Effect of High Calcium Precursor (HCP) Content on Bonding Strength of Geopolymer Concrete Exposed at Different Curing Temperatures","authors":"Warid Wazien Ahmad Zailani","doi":"10.24191/srj.v20i2.22142","DOIUrl":"https://doi.org/10.24191/srj.v20i2.22142","url":null,"abstract":"Geopolymer is a green cementitious binder that can be used to replace Portland cement binder and possesses exceptional physical, mechanical, and durability properties. Its mechanical properties such as bonding strength against the substrate were comparable to the Portland cement based repair products which can provide high durability and adhesive strength to the repaired structure. Geopolymer comprises two primary components which are the precursor and alkali activator. High Calcium Precursor (HCP) is the new repair material that was developed by Innovation Construction Materials (INCOM) Research Group to be used as a geopolymer’s precursor in Malaysia. In this research, the effect of HCP contents on the bonding strength of geopolymer concrete was assessed at different curing conditions. Based on the result, it was found that 100 g of HCP gave an optimum bonding strength of 21.3 MPa after 28 days of normal curing. In addition, in this research, the bonding strength also was measured after the geopolymer/substrate composite was exposed at different temperatures (60, 80, and 100 ⁰C). The bonding strength between HCP based geopolymer and the substrate does not significantly affected by the temperature’s exposure. Hence, HCP showed a high potential to be used as a precursor for geopolymer production.","PeriodicalId":21751,"journal":{"name":"Scientific Research Journal","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136238652","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

SONLU SAYDA NÖQTƏLƏRİNDƏN YANA DARTILARAQ YÜKLƏR ASILMIŞ BİRCİNS SİMİN MƏRKƏZLƏŞMİŞ QÜVVƏNİN TƏSİRİ ALTINDA YERDƏYİŞMƏSİ

Scientific Research Journal Pub Date : 2023-07-01 DOI: 10.36719/2789-6919/23/28-38

Zəfər Abbasov

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İRSİYYƏT, AİLƏ, ƏTRAF ALƏM, MƏKTƏB VƏ TƏHSİLİN VƏHDƏTİNDƏ FƏRDİN SOSİALLAŞMASI VƏ ŞƏXSİYYƏT PROBLEMİ

Scientific Research Journal Pub Date : 2023-07-01 DOI: 10.36719/2789-6919/23/7-19

Kərim Novruzov

引用次数: 0