RASIO PATI SINGKONG DAN ASAM AKRILAT TERHADAP KAPASITAS ABSORBSI PADA SINTESIS KOMPOSIT POLIMER SUPERABSORBAN

This study aimed to synthesize a superabsorbent polymer composite based on a natural polymer that has been made by grafting method using cassava starch as a backbone (main framework), Acrylic acid (AA) as a monomer, Ammonium persulfate (APS) as an initiator and N,N Methylene bisacrylamide (MBA) as a crosslinker. The effect of the ratio of cassava starch and acrylic acid (25 : 75; 50 : 50 and 75 : 25% weight total) has been studied based on absorption capacity. The chemical structure that occurs is analyzed using Fourier Transform Infra-red (FTIR) spectroscopy. The results of the FTIR spectrum showed that the grafting of acrylic acid to starch occurred. In the ratio of starch to acrylic acid 25 : 75% of the weight total obtained the maximum water absorption ability (absorption capacity) 224 g/g in aquades and 25 g/g in 0,9% NaCl solution. Tujuan dari penelitian ini adalah untuk mensintesis komposit polimer superabsorban berbasis polimer alam yang telah dibuat dengan metode grafting (pencangkokan) yang menggunakan pati singkong sebagai backbone (kerangka utama), asam akrilat (AA) sebagai monomer, Ammonium persulfat (APS) sebagai inisiator dan N,N Metilen bisakrilamida (MBA) sebagai crosslinker. Pengaruh rasio pati singkong dan asam akrilat (25 : 75; 50 : 50 dan 75 : 25% berat total) telah dipelajari berdasarkan kapasitas absorbsi. Struktur kimia yang terjadi dianalisa menggunakan spektroskopi Fourier Transform Infra-red (FTIR). Hasil dari spektrum FTIR memperlihatkan bahwa terjadinya grafting asam akrilat terhadap pati. Pada rasio pati dengan asam akrilat 25 : 75% berat total diperoleh kemampuan menyerap air (kapasitas absorbsi) maksimum 224 g/g dalam aquades dan 25 g/g dalam larutan NaCl 0,9%.

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Radiation Synthesis of Superabsorbent Poly(acrylamide-co-acrylic acid)-Sodium Alginate Hydrogels

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.746.88 ◽

2013 ◽

Vol 746 ◽

pp. 88-96 ◽

Cited By ~ 3

Author(s):

Erizal ◽

Sudirman ◽

Emil Budianto ◽

A. Mahendra ◽

Rike Yudianti

Keyword(s):

Electron Microscopy ◽

Acrylic Acid ◽

Sodium Alginate ◽

Irradiation Dose ◽

Natural Polymer ◽

Equilibrium Degree ◽

Infra Red ◽

Sem Micrograph ◽

Scanning Electron ◽

Poly Acrylamide

Sodium alginate (NaAlg) is considered to be a potential natural polymer for biomaterial applications, because of its hydrophilic properties that is capable to increase the swelling of hydrogels and biodegradable. This study describes the synthesis of a poly (acrylamide-co-acrylic acid) NaAlg superabsorbent hydrogels via crosslinking gamma radiation. The effect of irradiation dose (20-40 kGy) and NaAlg concentration (0.1-0.7 %) of on swelling of hydrogels were studied. The copolymers were characterized by Fourier transform infra red spectroscopy (FTIR) and scanning electron microscopy (SEM) micrograph. The presence of the lowest (0.1%) NaAlg concentration provokes a significant increasing the equilibrium degree solution (EDS) of hydrogel up 800 g/g ,and the extent of gel fraction increases as a function irradiation dose up to about 99 %. The hydrogels were also found to be sensitive to the ionic strength of medium. The FTIR spectra of hydrogels were shown crosslinking occurs between acrylamide and acrylic acid and pores structures in the hydrogel observed by using SEM.

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Interactions between Cocoa Husk Catechin and Casein Micelles and their Impact on Physico-chemical Properties

Asian Food Science Journal ◽

10.9734/afsj/2021/v20i230261 ◽

2021 ◽

pp. 21-33

Author(s):

Premy Puspitawati Rahayu ◽

Abdul Manab ◽

Manik Eirry Sawitri ◽

Ria Dewi Andriani ◽

Mulia Winirsya Apriliyani ◽

...

Keyword(s):

Particle Size ◽

Fourier Transform ◽

Chemical Structure ◽

Protein Profile ◽

Chemical Properties ◽

Electrophoretic Analysis ◽

Animal Science ◽

Physico Chemical ◽

Infra Red ◽

Microscopy Analysis

Aims: The purpose of this research was to investigate the influence of physicochemical properties of interaction casein with different concentration catechin sources of the cocoa husk. Study design: Casein was added catechin with various concentration treatments (0 (control), 20, 40 and 60 (μg/ml)). Place and Duration of Study: This study was conducted between April until August 2020 at the Faculty of Animal Science, Universitas Brawijaya. Methodology: Casein was added catechin with various concentration treatments (0, 20, 40 and 60 (μg/ml)). An analysis is carried out to determine interaction using UV-Vis detection, chemical structure using Fourier Transform Infra-Red, microscopy analysis by Scanning Electron Microscopy, particle size by Zetasizer Nano Series Software Version 7.01, Malvern Instrument and electrophoretic analysis. Results: The interaction between casein and catechin was investigated by the method of UV-Vis detection and chemical structure analysis by Fourier Transform Infra-Red showed that it was indicated that catechin could detected in casein. It is similar with recent research. The interaction of casein and catechin showed to decrease the particle size and showed on microscopy analysis. Protein profile showed to increase the molecular weight with the addition of catechin, it can be indicated that presence interaction both on casein with catechin. Conclusion: Casein interacted with catechins 60 µg/ml was able to increase casein stability, maintain nano size, casein components were still detected in the protein profile, the resulting microstructure looked compact and functional groups of bioactive compounds were still detected using Fourier Transform Infra-Red.

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Fast Swelling Superabsorbent Hydrogels Starch Based Prepared by Gamma Radiation Techniques

Indonesian Journal of Chemistry ◽

10.22146/ijc.21235 ◽

2014 ◽

Vol 14 (3) ◽

pp. 246-252 ◽

Cited By ~ 4

Author(s):

Erizal Erizal ◽

Dian Pribadi Perkasa ◽

Basril Abbas ◽

Sudirman Sudirman ◽

Sulistioso G.S.

Keyword(s):

Differential Scanning Calorimetry ◽

Fourier Transform ◽

Ionic Strength ◽

Acrylic Acid ◽

Irradiation Dose ◽

Room Temperature ◽

Scanning Calorimetry ◽

Radiation Crosslinking ◽

Infra Red ◽

Short Time

Fast swelling hydrogels were synthesized from the mixture of acrylamide (AAM)-acrylic acid (AA)-starch (15:5:1 w/v) solution by radiation crosslinking with varying irradiation doses (7.5-12.5 kGy) at room temperature. The copolymers were characterizated by Fourier transform infra red spectroscopy (FTIR) and Differential scanning calorimetry (DSC). It was found that hydrogels showed superabsorbent properties with higher swelling capacities (~400 g/g) and reached at a very short time (3 min). There was no significance difference between the effect irradiation dose on swelling of hydrogels. The hydrogels were also found to sensitive to the ionic strength of medium. The FTIR spectra and thermogram DSC of hydrogels were confirmed the crosslinking occurs in the hydrogels.

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The Role of the Initiator System in the Synthesis of Acidic Multifunctional Nanoparticles Designed for Molecular Imprinting of Proteins

Periodica Polytechnica Chemical Engineering ◽

10.3311/ppch.15414 ◽

2020 ◽

Vol 65 (1) ◽

pp. 28-41

Author(s):

Marwa Aly Ahmed ◽

Júlia Erdőssy ◽

Viola Horváth

Keyword(s):

Acrylic Acid ◽

Binding Affinity ◽

Molecular Imprinting ◽

Low Temperatures ◽

Ammonium Persulfate ◽

Sodium Bisulfite ◽

Multifunctional Nanoparticles ◽

High Affinity ◽

Initiator System

Multifunctional nanoparticles have been shown earlier to bind certain proteins with high affinity and the binding affinity could be enhanced by molecular imprinting of the target protein. In this work different initiator systems were used and compared during the synthesis of poly (N-isopropylacrylamide-co-acrylic acid-co-N-tert-butylacrylamide) nanoparticles with respect to their future applicability in molecular imprinting of lysozyme. The decomposition of ammonium persulfate initiator was initiated either thermally at 60 °C or by using redox activators, namely tetramethylethylenediamine or sodium bisulfite at low temperatures. Morphology differences in the resulting nanoparticles have been revealed using scanning electron microscopy and dynamic light scattering. During polymerization the conversion of each monomer was followed in time. Striking differences were demonstrated in the incorporation rate of acrylic acid between the tetramethylethylenediamine catalyzed initiation and the other systems. This led to a completely different nanoparticle microstructure the consequence of which was the distinctly lower lysozyme binding affinity. On the contrary, the use of sodium bisulfite activation resulted in similar nanoparticle structural homogeneity and protein binding affinity as the thermal initiation.

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PEMBUATAN DAN KARAKTERISASI SERAT HOLLOW DARI SELULOSA BAKTERIAL DENGAN NANOPARTIKEL ZnO UNTUK PENGOLAHAN AIR LIMBAH TEKSTIL

Arena Tekstil ◽

10.31266/at.v29i1.849 ◽

2014 ◽

Vol 29 (1) ◽

Author(s):

Rizka Yulina ◽

Srie Gustiani ◽

Wulan Septiani

Keyword(s):

Fourier Transform ◽

Acetobacter Xylinum ◽

Wet Spinning ◽

Ph Optimum ◽

Infra Red ◽

Remazol Black

Selulosa bakterial mempunyai sifat mekanik yang baik untuk digunakan sebagai membran pada proses pengolahan air limbah tekstil. Pada penelitian ini dilakukan pembuatan dan karakterisasi serat hollow dari bahan baku selulosa bakterial nata de coco dengan penambahan nanopartikel ZnO sebagai fotokatalis terimmobilisasi. Selulosa bakterial disintesis menggunakan bakteri Acetobacter xylinum di dalam medium air kelapa dan gula. Selulosa bakterial dilarutkan bersama dengan nanopartikel ZnO menggunakan pelarut cuprietilen diamina (Cuen) dengan variasi selulosa bakterial 2,25% dan 2,50%. Serat berbentuk hollow dihasilkan dari proses wet spinning menggunakan koagulan NaOH. Serat hollow yang telah melalui koagulan kemudian direndam dalam larutan asam, gliserol, dan alkohol, dengan variasi waktu perendaman asam selama 1 dan 2 hari. Uji kekuatan tarik menunjukkan hasil yang terbaik yakni sebesar 815,72 gf pada konsentrasi selulosa bakterial 2,50% dan perendaman asam selama 2 hari. Dari hasil uji gugus fungsi menggunakan spektroskopi Fourier Transform Infra Red (FTIR), terdapat beberapa gugus fungsi yang menunjukkan keberadaan selulosa dan nanopartikel ZnO. Proses dekolorisasi fotokatalitik terhadap air limbah tekstil artifisial yang mengandung zat warna reaktif Remazol Black 5 (RB5) menunjukkan bahwa pH optimum proses penyisihan warna yakni pada pH 9 dan dihasilkan persen penyisihan warna yang tertinggi yaitu 90,32%. Pada kondisi yang sama, proses dekolorisasi RB5 menggunakan serat hollow tanpa nanopatikel ZnO hanya menghasilkan persen penyisihan warna sebesar 32,10%. Berdasarkan laju penyisihan zat warna, aktivitas degradasi fotokatalitik terbesar (k’ = 0,2615) diperoleh pada konsentrasi ZnO 10% dan konsentrasi zat warna RB5 10 ppm.

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PENGGUNAAN TiO2 PARTIKEL NANO HASIL SINTESIS BERBASIS AIR MENGGUNAKAN METODA SOL-GEL PADA BAHAN KAPAS SEBAGAI APLIKASI UNTUK TEKSTIL ANTI UV

Arena Tekstil ◽

10.31266/at.v28i1.1434 ◽

2013 ◽

Vol 28 (1) ◽

Author(s):

Maya Komalasari ◽

Bambang Sunendar

Keyword(s):

Fourier Transform ◽

Electron Microscope ◽

Scanning Electron Microscope ◽

Sol Gel ◽

Crosslinking Agent ◽

X Ray Diffraction ◽

Nano Tio2 ◽

X Ray ◽

Infra Red ◽

Scanning Electron

Partikel nano TiO2 berbasis air dengan pH basa telah berhasil disintesis dengan menggunakan metode sol-gel dan diimobilisasi pada kain kapas dengan menggunakan kitosan sebagai zat pengikat silang. Sintesis dilakukan dengan prekursor TiCl4 pada konsentrasi 0,3 M, 0,5 M dan 1 M, dan menggunakan templat kanji dengan proses kalsinasi pada suhu 500˚C selama 2 jam. Partikel nano TiO2 diaplikasikan ke kain kapas dengan metoda pad-dry-cure dan menggunakan kitosan sebagai crosslinking agent. Berdasarkan hasil Scanning Electron Microscope (SEM),diketahui bahwa morfologi partikel TiO2 berbentuk spherical dengan ukuran nano (kurang dari 100 nm). Karakterisasi X-Ray Diffraction (XRD) menunjukkan adanya tiga tipe struktur kristal utama, yaitu (100), (101) dan (102) dengan fasa kristal yang terbentuk adalah anatase dan rutile. Pada karakterisasi menggunakan SEM terhadap serbuk dari TiO2 yang telah diaplikasikan ke permukaan kain kapas, terlihat adanya imobilisasi partikel nano TiO2 melalui ikatan hidrogen silang dengan kitosan pada kain kapas. Hasil analisa tersebut kemudian dikonfirmasi dengan FTIR (Fourier Transform Infra Red) yang hasilnya memperlihatkan puncak serapan pada bilangan gelombang 3495 cm-1, 2546 cm-1, dan 511 cm-1, yang masing-masing diasumsikan sebagai adanya vibrasi gugus fungsi O-H, N-H dan Ti-O-Ti. Hasil SEM menunjukkan pula bahwa kristal nano yang terbentuk diantaranya adalah fasa rutile , yang berdasarkan literatur terbukti dapatberfungsi sebagai anti UV.

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Synthesis, characterization, and their some chemical and biological properties of PVA/PAA/nPS hydrogel nanocomposites: Hydrogel and wound dressing

Journal of Bioactive and Compatible Polymers ◽

10.1177/0883911520921474 ◽

2020 ◽

Vol 35 (3) ◽

pp. 203-215

Author(s):

Mehmet Emin Diken ◽

Berna Koçer Kizilduman ◽

Begümhan Yilmaz Kardaş ◽

Enes Emre Doğan ◽

Mehmet Doğan ◽

...

Keyword(s):

Fourier Transform ◽

Acrylic Acid ◽

Infrared Spectra ◽

Vinyl Alcohol ◽

Fourier Transform Infrared ◽

Poly Vinyl Alcohol ◽

Seed Particles ◽

Fourier Transform Infrared Spectra ◽

Hydrogel Nanocomposites ◽

Poly Acrylic Acid

The nanocomposite hydrogels were prepared by dispersing of the nanopomegranate seed particles into poly(vinyl alcohol)/poly(acrylic acid) blend matrix in an aqueous medium by the solvent casting method. These hydrogels were characterized using scanning electron microscopy, Fourier transform infrared spectra, differential scanning calorimetry, and optical contact angle instruments. The nanopomegranate seed, blend, and hydrogel nanocomposites were tested for microbial activity. In addition, cytocompatibilities of these blend and hydrogel nanocomposites/composites were tested on human lymphocyte with in vitro MTS cell viability assays. Fourier transform infrared spectra revealed that esterification reaction took place among functional groups in the structure of poly(vinyl alcohol) and poly(acrylic acid). The hydrophilic properties of all hydrogels decreased with increasing nanopomegranate seed content. The mean diameters of the nanopomegranate seed particles were about 88 nm. Nanopomegranate seed particles demonstrated antibacterial properties against gram-positive bacteria, Staphylococcus aureus, and gram-negative bacteria, Escherichia coli. The lymphocyte viabilities increased after addition of nanopomegranate seeds into the polymer blend. The swelling behavior of blend and hydrogels was dependent on the cross-linking density created by the reaction between poly(vinyl alcohol)/poly(acrylic acid) blend and nanopomegranate seed. Scanning electron microscopy images were highly consistent with Fourier transform infrared spectra, differential scanning calorimetry, and antibacterial activity results.

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