Ungakuthola kanjani okuqukethwe umlotha we-hydroxypropyl methylcellulose?

Okuqukethwe komlotha kuyinkomba ebalulekile yokuthii-hydroxypropyl methylcellulose. Amakhasimende amaningi avame ukubuza ukuthi uma eqonda i-hydroxypropyl methylcellulose: iyini inani lomlotha? I-Hydroxypropyl methylcellulose enokuqukethwe komlotha okuncane isho ubumsulwa obuphezulu; i-cellulose enokuqukethwe komlotha okukhulu isho ukuthi kunokungcola okuningi kuyo, okuzothinta umphumela wokusetshenziswa noma kwandise inani lokwengeza. Lapho amakhasimende ekhetha i-hydroxypropyl methylcellulose, avame ukukhanyisa ngqo i-cellulose ethile ngomlilo bese eyishisa ukuze ahlole okuqukethwe komlotha we-cellulose. Kodwa le ndlela yokuthola ayihambisani nesayensi, ngoba abakhiqizi abaningi banezela izisheshisi zokushisa ku-cellulose. Ngaphezulu, i-cellulose inomlotha omncane kakhulu ngemva kokusha, kodwa empeleni, ukugcinwa kwamanzi kwe-hydroxypropyl methylcellulose akukuhle kakhulu.

Ngakho-ke kufanele sikubone kanjani kahle okuqukethwe umlotha we-hydroxypropyl methylcellulose? Indlela efanele yokuthola ukusebenzisa isithando somlilo ukuze sithole.

Ibhalansi yokuhlaziya ye-Instrument, isithando somlilo esishisayo esishisayo, isithando sikagesi.

Inqubo yokuhlola:

1) Okokuqala, faka i-crucible engu-30ml ye-porcelain esithandweni sokushisa okuphezulu bese uyishisa ku-(500~600) °C imizuzu engama-30, vala isango lesithando ukuze wehlise izinga lokushisa esithandweni libe ngaphansi kwama-200°C, bese ukhipha i-crucible bese uyihambisa ku-deiscator ukuze iphole (20~30 min), inesisindo.

2) Isisindo esingu-1.0 gi-hydroxypropyl methylcelluloseKubhalansi yokuhlaziya, faka isampula elilinganisiwe ku-crucible, bese ubeka i-crucible equkethe isampula ku-furnace kagesi ukuze i-carbonization, iphole kuze kufike ekushiseni kwegumbi, engeza i-sulfuric acid (0.5-1.0) ml, bese uyibeka ku-furnace kagesi ukuze i-carbonization iphelele. Bese uthuthela ku-furnace yokushisa okuphezulu, ushise ku-(500~600) ℃ ihora eli-1, ucime amandla e-furnace yokushisa okuphezulu, lapho izinga lokushisa le-furnace lehla ngaphansi kuka-200 ℃, likhiphe bese ulifaka ku-desiccator ukuze liphole (20~30 min), bese ulilinganisa kubhalansi yokuhlaziya.

Ukubala Izinsalela zokusha zibalwa ngokwefomula (3):

m2-m1

Izinsalela zokushisa (%) = ×100………………(3)

m

Kufomula: m1 – isisindo se-crucible engenalutho, ku-g;

m2 – isisindo sezinsalela kanye ne-crucible, ku-g;

m – isisindo sesampula, ku-g.