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Subject: search.filters.subject.Film properties

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    Item type:Publication,
    Properties of novel biodegradable film from gelatin capsule waste as influenced by various solvents and washing cycles
    (2024-12-01)
    Kumnerdsiri, Pudthaya
    ;
    Sanprasert, Sasina
    ;
    Seubsai, Anusorn
    ;
    Pongsetkul, Jaksuma
    ;
    Harnkarnsujarit, Nathdanai
    Biodegradable films, featuring eco-friendly attributes, offer a promising solution to environmental pollution and ecological challenges, serving as a viable alternative to synthetic polymer packaging films. This study investigates the washing process with various solvents (ethanol and water) and washing cycles (1 and 3 times) on the properties of gelatin capsule waste films (GCWF). The washing process could improve properties such as tensile strength, thermal properties, transparency value, and solubility by eliminating oil droplets from the raw materials. The GCWF washed by ethanol (GCWF Alc) exhibited higher tensile strength (TS), thermal properties, and transparency value compared with GCWF washed by water (GCWF W). Increasing the number of washing cycles could also enhance the efficiency of eliminating oil droplets from the raw materials. The complete degradation of GCWF in soil was observed on day 15 after burial. FTIR spectroscopy revealed differences in bands and patterns between control film (GCWF) and washed films (GCWF Alc and GCWF W). These findings highlight the potential of the washing process in enhancing film properties, and the utilization of gelatin capsule waste as biodegradable films could be further developed for food packaging applications, contributing to environmentally friendly technologies
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    A study of polymer for delay germination in hybrid sweet corn seed production
    (2024-05-01)
    Sodakul, N.
    ;
    Sikhao, P.
    The results showed that the pH values of each coating substance formulation exhibited statistically significant differences. Notably, the highest pH value was observed in the coating substance mixed with CMC. Similarly, the viscosity of the coating substances showed significant variations, with the commercial coating substance having the highest viscosity. Following this, the coating substances mixed with CMC, HPMC, NaAlg, and PVP-K30 demonstrated progressively lower viscosities. To assess the uniformity of the coating, the surface characteristics of the seeds were visually examined. The results indicated that seeds coated with the commercial coating substance exhibited the highest coating uniformity. Subsequently, the uniformity levels decreased in the following order: seeds coated with a mixture of PVP-K30, HPMC, CMC, and NaAlg. For the seed quality test after coating, the results showed that all types of polymers had no statistically significant effect on the germination percentage and germination index. If further studies are conducted on the types and concentrations of polymers, it is possible to develop seed coating formulations to delay germination.
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