ʻO ka Hydroxypropylmethylcellulose (HPMC) kahi derivative cellulose i hoʻohana nui ʻia i nā ʻoihana like ʻole. ʻO ka hoʻohana nui ʻana o HPMC e like me nā mānoanoa, stabilizers a me emulsifiers i ka meaʻai, lāʻau lapaʻau a me nā ʻoihana hoʻonaninani. Hoʻohana pū ʻia ʻo HPMC i ka ʻāpana hana ma ke ʻano he mea hoʻohui cement, ma ke ʻano he uhi no nā papa a me nā capsules, a ma ke ʻano he ophthalmic solution. ʻO nā mea waiwai nui o HPMC he cellulose a me nā reagents kemika.
Cellulose:
ʻO Cellulose ka mea nui no ka hana ʻana o HPMC. ʻO ka Cellulose kahi polymer kūlohelohe i loaʻa i loko o nā paia o nā mea kanu a ʻo ia ka polymer kūlohelohe nui loa ma ka Honua. ʻO nā waiwai kemika o cellulose ua like ia me HPMC, kahi e hana ai i mea waiwai kūpono no ka hana ʻana o HPMC. Loaʻa ka Cellulose mai nā kumu like ʻole, me ka lāʻau, ka pulupulu, a me nā mea kanu like ʻole.
ʻO ke kumu maʻamau o ka cellulose i hoʻohana ʻia no ka hana HPMC ʻo ia ka pulp lāʻau. Loaʻa ka pulp lāʻau mai nā lāʻau palupalu e like me ka spruce, pine a me ka fir. Hoʻohana ʻia ka pulp lāʻau e wāwahi i ka lignin a me ka hemicellulose, e waiho ana i ka cellulose maʻemaʻe. Hoʻomaʻemaʻe ʻia ka cellulose maʻemaʻe a holoi ʻia e wehe i nā haumia.
ʻO ka cellulose i hoʻohana ʻia no ka hana HPMC pono ke ʻano kiʻekiʻe a pono e hahai ʻia nā ana hoʻomalu koʻikoʻi e hōʻoia i ka maʻemaʻe o ka cellulose. He mea koʻikoʻi ka maʻemaʻe o ka cellulose no ka mea hiki i nā haumia ke hoʻopili i nā waiwai o ka huahana hope.
Nā mea hoʻopaʻa kemika:
Pono ka hana ʻana o HPMC i ka hoʻohana ʻana i nā reagents kemika. ʻO nā reagents kemika i hoʻohana ʻia i ka hana ʻana o ka HPMC he propylene oxide, methyl chloride, sodium hydroxide, hydrochloric acid, etc.
Hoʻohana ʻia ka propylene oxide e hana i ka hydroxypropyl cellulose (HPC), a laila hana ʻia me ka methyl chloride e hana i ka HPMC. Hoʻopili ka HPC me ka methyl chloride e pani i kekahi o nā pūʻulu hydroxyl ma ke kaulahao cellulose me nā pūʻulu methoxy a me hydroxypropyl, a laila e hoʻokumu ʻia ai ka HPMC.
Hoʻohana ʻia ka sodium hydroxide i ka hana ʻana o HPMC e hoʻonui i ka waiwai pH o ka hopena hopena e kōkua i ka hoʻopau ʻana i ka cellulose.
I ka wā o ke kaʻina hana HPMC, hoʻohana ʻia ka waika hydrochloric e hoʻoponopono i ka waiwai pH o ka hopena hopena.
Pono ka ma'ema'e ki'eki'e o nā reagents kemika i ho'ohana 'ia i ka hana HPMC, a pono e ho'omalu pono 'ia nā kūlana o ka hopena e hō'oia i ka maika'i o ka huahana hope.
i ka hopena:
ʻO nā mea waiwai nui o HPMC he cellulose a me nā reagents kemika. ʻO ka cellulose, i loaʻa mai nā kumu like ʻole me ka lāʻau, ka pulupulu, a me nā mea kanu like ʻole, ʻo ia ka mea mua no ka hana ʻana o HPMC. ʻO nā reagents kemika i hoʻohana ʻia i ka hana HPMC he propylene oxide, methyl chloride, sodium hydroxide a me ka waikawa hydrochloric. Pono ka hana ʻana o HPMC i nā ʻano hoʻomalu koʻikoʻi e hōʻoia i ka maʻemaʻe o nā mea maka a me ka maikaʻi o ka huahana hope. Hoʻohana nui ʻia ʻo HPMC i nā ʻoihana like ʻole a loaʻa iā ia ka nui o nā noi ma muli o kāna mau waiwai kūikawā.
Ka manawa hoʻouna: Sep-06-2023