Filled temperature‐sensitive poly(vinyl methyl ether) hydrogels

Theiss, Daniel; Schmidt, Thomas; Dorschner, H.; Reichelt, Rudolf; Arndt, Karl‐Friedrich

doi:10.1002/app.22015

Cited by 7 publications

(5 citation statements)

References 29 publications

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“…This process corresponds to the polymer chain collapse transition [5]. The temperature of this transition is the same for hydrogels of different crosslinking degree because it is determined by the LCST.…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Molecular relaxations in radiationally crosslinked poly(vinyl methyl ether) hydrogels

Pastorczak

Kadłubowski

Okrasa

et al. 2007

Journal of Non-Crystalline Solids

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Section: Discussionmentioning

confidence: 99%

“…Poly (vinyl methyl ether), PVME, is a hydrophilic polymer which exhibits lower critical solution temperature (LCST) at ca. 37°C [5]. A hydrogel formed from a PVME polymer reveals volume phase transition (swelling/deswelling) in this temperature and is considered to be potentially perfect drug carrier [6,7].…”

Section: Introductionmentioning

confidence: 99%

Molecular relaxations in radiationally crosslinked poly(vinyl methyl ether) hydrogels

Pastorczak

Kadłubowski

Okrasa

et al. 2007

Journal of Non-Crystalline Solids

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“…Rajah 8 menunjukkan morfologi bagi permukaan hidrogel dengan nisbah 5:2 yang telah dihasilkan berdasarkan kepada imej mikrograf, hidrogel dengan nisbah 5:2 mempunyai kerapuhan yang baik di mana tiada berlakunya peretakan di atas permukaan hidrogel [12]. Rajah 7.…”

Section: Analisis Mikroskopi Pengimbasan Elektronunclassified

Synthesis and Characterization of Starch-Based Hydrogel by Using Gamma Radiation Technique

Ping

Lazim²

2016

MJAS

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AbstrakHidrogel berasaskan kanji daripada ubi gadong dengan menggunakan teknik radiasi gamma telah disintesis dan pencirian terhadapnya telah dilakukan bagi mendapatkan hidrogel yang terbaik. Hidrogel berasaskan kanji ini dihasilkan dengan menggunakan asid akrilik (AA) sebagai monomer dan kanji ubi gadong sebagai ko-monomer. Teknik radiasi gamma telah digunakan sebagai agen penaut silang. Isipadu ubi gadong yang berlainan digunakan untuk menghasilkan hidrogel dengan nisbah asid akrilik (AA) kepada ubi gadong. Hidrogel dengan nisbah 4:1 dan 5:2 telah disintesis. Tindak balas yang terlibat ialah pempolimeran radikal bebas dengan menggunakan radiasi gamma. Ujian pengembangan telah dilakukan untuk menguji sensitiviti hidrogel terhadap perubahan pH. Analisis morfologi hidrogel dilakukan dengan menjalani analisis Mikroskopi Pengimbasan Elektron (SEM). Analisis struktur kimia hidrogel ditentukan oleh Spektroskopi Inframerah (IR). Pembelauan Sinar X (XRD) dijalankan bagi menunjukkan hidrogel mengandungi komponen amorfus. Kalorimetri Pengimbasan Perbezaan (DSC) dan Analisis Gravimetri Terma (TGA) dijalankan bagi menunjukkan kestabilan terma hidrogel yang disintesis. Ujian pembengkakan telah dijalankan di dalam larutan penimbal pH 3, 5, 7, 9 dan 12 pada suhu bilik. Dalam larutan penimbal 7, 9 dan 12, didapati bahawa hidrogel bernisbah 5:2 mempunyai nilai yang lebih tinggi berbanding dengan hidrogel bernisbah 4:1. Manakala di dalam larutan penimbal pH 3 dan 5 pula, hidrogel bernisbah 4:1 mempunyai nilai pengembangan yang lebih tinggi berbanding hidrogel bernisbah 5:2. Puncak pada Spektrum Inframerah membuktikan kehadiran kumpulan berfungsi -OH daripada kanji berkurangan kerana telah digunakan dalam proses pempolimeran. Daripada termogram DSC dan TGA dapat diperhatikan bahawa nilai peralihan kaca, Tg untuk hidrogel bernisbah 5:2 lebih tinggi berbanding dengan hidrogel bernisbah 4:1.Kata kunci: hidrogel, kanji, ubi gadong, teknik radiasi gamma Abstract Starch-based hydrogel is synthesized using gamma radiation. The hydrogel is then characterized to obtain the best ratio of hydrogel. Starch-grafted-acrylic acid hydrogels is produced using acrylic acid as monomer and starch from gadong tuber as comonomer. Gamma radiation is used as cross-linking agent. Different volume of starch is used to produce hydrogels with different ratios of acrylic acid (AA) to starch. Hydrogels with ratio of 4:1 and 5:2 are synthesized. The reaction involved in the synthesis of hydrogel was a free radical polymerization. Swelling test for the starch-based hydrogel is carried out to observe the ability of hydrogel respond to the environmental change. Scanning Electron Microscope (SEM) is used to determine the morphology of hydrogel. The analysis of chemical structure is determined using the Infrared Spectrometer (IR). X-Ray Diffraction (XRD) is used to determine the present of amorphous component in the hydrogel. Differential Scanning Calorimetry (DSC) and Thermogravimetric Analysis (TGA) are used to determine the thermal stability of the hydrogel. Swe...

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“…One interesting strategy, e.g., is to prepare smart hydrogels in the presence of ferroelectric microand nanoparticles [9].…”

Section: Fesem Of Filled Hydrogelsmentioning

confidence: 99%

Hydrogels

Matzelle¹,

Reichelt²

2009

I&M

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Filled temperature‐sensitive poly(vinyl methyl ether) hydrogels

Cited by 7 publications

References 29 publications

Molecular relaxations in radiationally crosslinked poly(vinyl methyl ether) hydrogels

Molecular relaxations in radiationally crosslinked poly(vinyl methyl ether) hydrogels

Synthesis and Characterization of Starch-Based Hydrogel by Using Gamma Radiation Technique

Hydrogels

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