Hasil Pencarian  ::  Simpan CSV :: Kembali

Abstrak :
Sintesis hidrogel kitosan-poli(N-vinil-2-pirolidon) (PNVP) dengan metode full-Interpenetrating Polymer Network (full-IPN) dilakukan secara bertahap (sequential). Tahap pertama yaitu melakukan sintesis jaringan polimer kitosan terikat silang asetaldehida melalui homogenisasi. Tahap kedua yaitu melakukan sintesis jaringan PNVP terikat silang N, N?-metilenbisakrilamida (MBA) melalui reaksi polimerisasi radikal bebas dari monomer NVP dengan agen pengikat silang MBA dan inisiator amonium persulfat (APS). Hidrogel kitosan-PNVP full-IPN yang dihasilkan, memiliki kekuatan ikat silang lebih baik yang teramati dari nilai derajat ikat silang serta dapat mempertahankan kemampuan swelling dengan baik yang teramati dari nilai rasio swelling dibandingkan dengan hidrogel kitosan. Hasil optimum dari rasio swelling dan derajat ikat silang pada hidrogel kitosan-PNVP full-IPN sebesar 149,8% dan 85,4% dengan komposisi kitosan:monomer NVP yaitu 70:30 (b/b %), waktu reaksi polimerisasi 0,5 jam, konsentrasi MBA 1% (b/b), serta konsentrasi APS 1% (b/b). Karakterisasi dilakukan dengan Spektrofotometer Fourier Transform Infrared (FTIR), Differential Scanning Calorimetry (DSC), dan Scanning Electron Microscope (SEM).

---

Synthesis of hydrogel chitosan-poly(N-vinyl-2-pyrrolidone) (PNVP) by full-Interpenetrating Polymer Network was performed in stages (sequential method). The first stage was the synthesis of chitosan polymer network by crosslinked with acetaldehyde under homogenization process. The second stage was the synthesis which was PNVP of crosslinked with N,N?-methylenebisacrylamide (MBA) through free radical polymerization reaction of NVP monomer, was used as the crosslink agent MBA and ammonium persulfate (APS) as the initiator. The synthesized hydrogel chitosan-PNVP full-IPN has a good strength due to the observed crosslinking structure observed the value of crosslinking degree and the good swelling capability by the value of swelling ratio compared with hydrogel chitosan. The optimum result of swelling ratio and the degree of crosslinking from hydrogel chitosan-PNVP full-IPN were 149,8% and 85,4% which were obtained with the composition chitosan:NVP monomer of 70:30 (w/w %), the polymerization reaction time of 0,5 hours, the concentration MBA 1% (w/w), and the concentration APS 1% (w/w). Products characterizations were done by Fourier Transform Infrared Spectrophotometer (FTIR), Differential Scanning Calorimetry (DSC), dan Scanning Electron Microscope (SEM).

Abstrak :
ABSTRAK
Seiring waktu, perkembangan makna tektonik mengarah pada materialitas, tindakan terampil dalam arti spesifik yaitu teknik dalam menghadirkan ekspresi visual dan estetika yang terwujud dalam struktur dan konstruksi. Teknologi beton mencakup pengetahuan tentang materialitas, teknik dan bentuk. Materialitas mengarah pada sifat dan karakteristik sebagai hal mendasar dalam menentukan teknik mengolahnya. Material beton merupakan material bentukan, teknik mengolahnya dengan mencetak (casting) pada cetakan untuk menghasilkan bentuk (form). Skripsi ini membahas material beton dalam konteks tektonik, bagaimana teknik pengolahan material beton dengan berbagai teknik agar menghasilkan perwujudan bentuk yang mengandung kualitas estetika tektonik dari elemen struktur dan konstruksi serta kualitas ruang sebagai elemen ruang

---

ABSTRACT
Over time, the development of tectonic significane lead to materiality, skillfull action within the meaning of spesific is a technique in presenting visual expression and aesthetics that materialized in the structure and constraction. Concrete technology include knowledge of materiality, techniques and forms. Materiality leads to the nature and characteristics as fundamental in determine the technique process. The concrete material is a material formed. The technique process by casting on the mold to produce form. This thesis discusses the concrete material in the context of tectonic, how the concrete materials process technique with various technique to produce manifestation form that contain the aesthetic tectonic qualities of structural elements and construction as well as the spatial quality as an element of space