Itandukaniro riri hagati ya sitashi ya hydroxypropyl na selulose ya Hydroxypropyl methyl

Ifu ya Hydroxypropyl na hydroxypropyl methyl cellulose (HPMC) byombi ni polysaccharide zahinduwe zikoreshwa mu nganda zitandukanye, harimo ibiribwa, imiti, amavuta yo kwisiga, n'ubwubatsi. Nubwo bihuriye ku bintu bimwe na bimwe, bifite itandukaniro ritandukanye mu bijyanye n'imiterere ya chimique, imiterere, n'ikoreshwa. Dore itandukaniro rikomeye riri hagati ya hydroxypropyl na HPMC:

Imiterere y'ibinyabutabire:

1. Ifu ya Hydroxypropyl:
   • Igitagangurirwa cya Hydroxypropyl ni igitagangurirwa cyahinduwe kiboneka binyuze mu kwinjiza amatsinda ya hydroxypropyl kuri molekile ya sitaga.
   • Ifuru ni polysaccharide igizwe n'ibice bya glucose bihujwe n'imigozi ya glycosidic. Ifuru ya hydroxypropyl ikubiyemo gusimbuza amatsinda ya hydroxyl (-OH) muri molekyuli ya starchi hamwe n'amatsinda ya hydroxypropyl (-CH2CHOHCH3).
2. Hydroxypropyl Methyl Cellulose (HPMC):
   • HPMC ni eteri ya selulosi yahinduwe iboneka binyuze mu kwinjiza amatsinda ya hydroxypropyl na methyl kuri molekile ya selulosi.
   • Selulose ni polysaccharide igizwe n'ibice bya glucose bihujwe n'imigozi ya glycosidic ya β (1 → 4). Hydroxypropylation ishyiramo amatsinda ya hydroxypropyl (-CH2CHOHCH3), mu gihe methylation ishyiramo amatsinda ya methyl (-CH3) ku mugongo wa cellulose.

Imitungo:

1. Gushonga:
   • Igitagangurirwa cya Hydroxypropyl gikunze gushonga mu mazi ashyushye ariko gishobora gushonga mu mazi akonje.
   • HPMC irashongeshwa mu mazi akonje n'ashyushye, ikora ibisubizo bisobanutse kandi bitose. Gushonga kwa HPMC biterwa n'urwego rwo gusimbuza (DS) n'uburemere bwa molekile ya polymer.
2. Ubucucike:
   • Igitagangurirwa cya Hydroxypropyl gishobora kugaragaza ubushobozi bwo kongera ubukana, ariko ubukana bwacyo muri rusange buri hasi ugereranije na HPMC.
   • HPMC izwiho ubushobozi bwayo bwiza bwo gukurura no guhindura ubushyuhe. Ubushyuhe bw'ibisubizo bya HPMC bushobora guhindurwa hakoreshejwe guhindura urugero rwa polymer, DS, n'uburemere bwa molekile.

Porogaramu:

1. Ibiribwa n'imiti:
   • Ifu ya Hydroxypropyl ikunze gukoreshwa nk'ikintu gikomeza ubushyuhe, gitera imbaraga, kandi gitera imbaraga mu biryo nk'isupu, isosi, n'ibiryo biryoshye. Ishobora kandi gukoreshwa mu miti.
   • HPMC ikoreshwa cyane mu biribwa, mu miti no mu mavuta yo kwisiga nk'umuti ugabanya ubushyuhe, ugabanya ubushyuhe, ugabanya ubushyuhe, ugabanya ubushyuhe, kandi ugabanya ubushyuhe. Ikunze kuboneka mu bicuruzwa nka ibinini, amavuta yo kwisiga, amavuta yo kwisiga, n'ibikoresho byo kwisiga ku giti cy'umuntu.
2. Ubwubatsi n'ibikoresho by'ubwubatsi:
   • HPMC ikoreshwa cyane mu nganda z'ubwubatsi nk'inyongera mu bicuruzwa bishingiye kuri sima nka kole z'amatafari, mortiers, renderings, na plasters. Ituma amazi agumana, akore neza, afatanye, kandi irushaho kunoza imikorere muri izi porogaramu.

Umwanzuro:

Nubwo sitashi ya hydroxypropyl na HPMC byombi ari polysaccharides zahinduwe zifite imikorere isa, zifite imiterere, imiterere, n'imikorere itandukanye. Sitashi ya hydroxypropyl ikoreshwa cyane cyane mu biribwa no mu miti, mu gihe HPMC ikoreshwa cyane mu biribwa, mu miti, mu mavuta yo kwisiga, no mu bikoresho by'ubwubatsi. Guhitamo hagati ya sitashi ya hydroxypropyl na HPMC biterwa n'ibisabwa byihariye by'ikoreshwa ryabyo.