Indonesian Chemistry and Application Journal最新文献_第2页

OPTIMASI RASIO Si/Al, RASIO PADATAN/CAIRAN, KONSENTRASI NaOH DAN JENIS AGREGAT DALAM SINTESA BETON GEOPOLIMER DENGAN METODE TAGUCHI 优化Si/Al比，固体/液体比

Indonesian Chemistry and Application Journal Pub Date : 2018-08-28 DOI: 10.26740/icaj.v2n1.p26-32

Ufafa Anggarini

{"title":"OPTIMASI RASIO Si/Al, RASIO PADATAN/CAIRAN, KONSENTRASI NaOH DAN JENIS AGREGAT DALAM SINTESA BETON GEOPOLIMER DENGAN METODE TAGUCHI","authors":"Ufafa Anggarini","doi":"10.26740/icaj.v2n1.p26-32","DOIUrl":"https://doi.org/10.26740/icaj.v2n1.p26-32","url":null,"abstract":"The optimization synthezised of geopolymer based on fly ash materials have been done by using Taguchi method. The experimental design was done with 4 factors and 3 levels, that were the influence of Si/Al ratio, solid/liquid ratio, NaOH and the type of aggregate. Geopolymers were synthesized by sol gel method at room temperature, using fly ash as aluminasilica source and alkaline activator solutions thain consist of NaOH and Na2SiO3. The influence of Si/Al ratio studied at level of 4.00, 4.25, 4,50, solid/liquid ratio at level of 1.50, 2.33, 4.00. NaOH (%wt/%v) of 0.24, 0.40, 0.56, and the type of aggregate of Malang sand, Bojonegoro sand and granite. Based on SNR analysis and the characterization determination of higher is better, the geopolymer optimum composition was Si/Al factor at level of 3 (4.50), solid/liquid ratio level at 2 (2.33), NaOH level at 1 (0.24) and type of aggregate level at 3 (granite). The calculation of compressive strength prediction was determined at 21.01 Mpa, while the optimum compressive strength of the experimental result was found at 21 Mpa. Keywords: Geopolymer, Taguchi Method, Si/Al, Solid/Liquid, NaOH, Type of agreggate","PeriodicalId":175785,"journal":{"name":"Indonesian Chemistry and Application Journal","volume":"356 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133632768","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

NATROSOL SEBAGAI SALAH SATU BAHAN PENGENTAL (THICKENER) PADA PRODUKSI BIOETANOL GEL DARI LIMBAH DAUN TEBU 作为一种软化剂，用于从甘蔗废料中提取生物乙醇凝胶

Indonesian Chemistry and Application Journal Pub Date : 2018-08-28 DOI: 10.26740/icaj.v2n1.p12-18

Rini Kartika Dewi

{"title":"NATROSOL SEBAGAI SALAH SATU BAHAN PENGENTAL (THICKENER) PADA PRODUKSI BIOETANOL GEL DARI LIMBAH DAUN TEBU","authors":"Rini Kartika Dewi","doi":"10.26740/icaj.v2n1.p12-18","DOIUrl":"https://doi.org/10.26740/icaj.v2n1.p12-18","url":null,"abstract":"Kemajuan teknologi pada bidang energi memberikan dampak posistif terhadap perkembangan energi alternatif, dimana salah satunya adalah modifikasi bioetanol menjadi bahan bakar gel (bioethanol gel/ fuel gel). Fuel gel banyak digunakan sebagai bahan bakar skala rumah tangga ataupun bahan bakar portabel untuk kegiatan di luar rumah. Beberapa kelebihan dari bioethanol gel antara lain merupakan energi terbarukan, hasil pembakaran bersih (tidak berasap, tidak berbau), penyalaan mudah serta memudahkan dalam distribusi. Bioetanol gel terdiri dari etanol, bahan pengental/ thickener (umumnya material turunan selulosa) dan neutralizer. Natrosol merupakan bahan pengental produksi Aqualon yang memiliki bahan aktif hidroksietilselulosa. Gugus fungsi O-H alkohol (1), C-H alkana (5) dan C-O ester (6) yang terbaca pada spektra FTIR menunjukkan keberadaan bahan aktif hidroksietilselulosa. Selain itu terdapat gugus fungsi O-H asam karboksilat (2) dan C=O (3) yang menunjukkan adanya campuran bahan lain yang merupakan senyawa asam karboksilat di dalam Natrosol. Proses pembuatan bioetanol gel adalah dengan menambahkan etanol hasil distilasi dengan kadar 96% dengan penambahan pengental (thickener), akuades dan triisopropanolamina (sebagai penstabil). Pengental berupa natrosol dan karbopol dengan variasi 0,5; 1,5; 2.0; 2.5 gram, dicampurkan dengan 31 gram akuades dan diaduk sampai terbentuk gel, hasilnya ditambahkan 75 gram etanol dan triisopropanolamina. Selanjutnya, dilakukan analisis terhadap gel bioetanol yang terbentuk dengan mengamati analisis nyala dengan pengamatan asap yang terbentuk, warna api, emisi gas dan lama penyalaan.","PeriodicalId":175785,"journal":{"name":"Indonesian Chemistry and Application Journal","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128948673","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: 1

Activity of Water Soluble Polysaccharide White Bentul (Colocasia Esculenta Schott [L]) As a Candidate for Antidiabetic Agent 水溶多糖白胶(Colocasia Esculenta Schott)抗糖尿病活性研究[L]

Indonesian Chemistry and Application Journal Pub Date : 2018-08-28 DOI: 10.26740/icaj.v2n1.p1-11

S. J. Raharjo

{"title":"Activity of Water Soluble Polysaccharide White Bentul (Colocasia Esculenta Schott [L]) As a Candidate for Antidiabetic Agent","authors":"S. J. Raharjo","doi":"10.26740/icaj.v2n1.p1-11","DOIUrl":"https://doi.org/10.26740/icaj.v2n1.p1-11","url":null,"abstract":"White bentul tuber is one of tuber plant species which have bioactive compound of Water Soluble Polysaccharide (WSP) and potentially healthy nutrition in the therapy of metabolic syndrome disease. The purpose of this research is to prove the ability of WSP isolate to reduce blood glucose level in white mice. Research method include the yield of WSP isolates white bentul tuber using enzymatic method, WSP identification using HPLC with Aminex HPX-87C BIORAD5 columns, and antidiabetic activity test using white mices. Test activity was performed in six treatment groups (Normal, Induction STZ 20 mg/ kgBW, Induction STZ 20 mg / kgBW + metformin 195mg / KgBW, three treatment with STZ induction 20 mg/ kgBW and WSP isolate with concentration 200, 400, and 600mg / kgBW). Determination of blood glucose levels using glucometer and supported by observation of histologic improvement of beta pancreatic cells in white mice that have necrosis. The result research are WSP yield of 4.81% and WSP level of 94.45%. Results of blood glucose levels of mice induced STZ 20mg/kgBW decreased optimal blood glucose with a dose of WSP 400mg/kgBW in the first week and histologic improvement of beta pancreatic cells that experienced the most optimal necrosis at WSP dose of 200 mg/kgBW. The conclusion of this research is the provision WSP isolate of white bentul tubers at doses of 200, 400, 600 mg/kgBW can decrease the blood glucose level induced STZ 20mg/kg BW and histological improvement in pancreatic beta cells at the most optimal dose of 200 mg / kgKeywords: White bentul tuber, water soluble polysaccharides, diabetes mellitus, beta pancratic cells ","PeriodicalId":175785,"journal":{"name":"Indonesian Chemistry and Application Journal","volume":"62 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114635569","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

STUDI ADSORPSI TIMBAL PADA MEMBRAN KITOSAN TERMODIFIKASI POLIDOPAMIN 一项对多多巴胺细胞膜的铅导体导体研究

Indonesian Chemistry and Application Journal Pub Date : 2018-08-28 DOI: 10.26740/ICAJ.V2N1.P33-37

Chairunnisa Chairunnisa

引用次数: 1

PEMBUATAN SERBUK KARBON AKTIF DARI LIMBAH BAMBU SEBAGAI PENYANGGA KATALIS LOGAM DALAM SINTESIS BIOFUEL SECARA FISCHER-TROPSCH

Indonesian Chemistry and Application Journal Pub Date : 2018-08-28 DOI: 10.26740/icaj.v2n1.p19-25

Endah Kusuma Rastini

{"title":"PEMBUATAN SERBUK KARBON AKTIF DARI LIMBAH BAMBU SEBAGAI PENYANGGA KATALIS LOGAM DALAM SINTESIS BIOFUEL SECARA FISCHER-TROPSCH","authors":"Endah Kusuma Rastini","doi":"10.26740/icaj.v2n1.p19-25","DOIUrl":"https://doi.org/10.26740/icaj.v2n1.p19-25","url":null,"abstract":"Sintesis Fischer-Tropsch merupakan rute alternatif untuk konversi biomassa menjadi bahan bakar cair yang cukup menjanjikan karena produk biofuel yang dihasilkan memiliki karakteristik identik dengan bahan bakar fosil. Biomassa dikonversi menjadi gas sintesis (CO dan H2) melalui polimerisasi menjadi hidrokarbon rantai panjang (wax) dan selanjutnya dipotong-potong melalui proses perengkahan menghasilkan hidrokarbon rantai pendek (C5-C12) yang merupakan biofuel. Penggunaan karbon aktif sebagai penyangga dapat menghasilkan biofuel secara langsung. Penelitian ini bertujuan karakterisasi serbuk karbon aktif sebagai penyangga katalis logam yang akan digunakan dalam sintesis Fischer-Tropsch dan memanfaatkan limbah bambu sebagai sumber karbon aktif. Pembuatan karbon aktif dari bambu ini dilakukan dengan kombinasi aktivasi Karbonisasi-H3PO4 (A), Karbonisasi-H3PO4-Steam (B). Bambu dikecilkan ukurannya, dikeringkan dan diarangkan pada 5000C dengan aliran gas nitrogen dalam reaktor karbonisasi, diserbukkan, selanjutnya diaktivasi dengan H3PO4 85% dan dicuci sampai pH netral. Setelah pengeringan, sampel difungsionalisasi dengan HNO3 65%, dinetralkan, dikeringkan dan dikalsinasi pada 7000C. Struktur kristal pada karbon aktif dianalisa menggunakan XRD. Karbon aktif hasil berbagai urutan aktivasi memiliki profil XRD yang identik dan sudah menunjukkan spektra khas untuk karbon aktif. Karbon aktif yang dihasilkan sudah sesuai dengan struktur kristal berdasarkan sudut difraksi hasil analisis XRD. Aktivasi karbon yang diawali dengan steam kemudian ditreatment dengan asam fosfat (B) menunjukkan hasil yang lebih baik dalam hal terbentuknya gugus fungsi oksigen. Spektra gugus fungsi alkohol, fenol, karbonil, karboksilat muncul dengan intensitas yang cukup besar dibandingkan perlakuan aktivasi tanpa menggunakan steam. Hal ini menunjukkan bahwa kombinasi aktivasi fisik (steam) dan aktivasi kimia (asam fosfat) meningkatkan terbentuknya gugus fungsi oksigen dibandingkan proses fungsionalisasi menggunakan asam nitrat saja.","PeriodicalId":175785,"journal":{"name":"Indonesian Chemistry and Application Journal","volume":"87 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124298032","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