ʻO HPMC a i ʻole hydroxypropyl methylcellulose kahi mea hana maʻalahi i hoʻohana ʻia i nā ʻano ʻoihana like ʻole e like me nā lāʻau lapaʻau, nā mea hoʻonani a me ka meaʻai. Hoʻohana nui ʻia ia ma ke ʻano he mea hoʻomānoanoa a me ka emulsifier, a loli kona mānoanoa ma muli o ka mahana i hōʻike ʻia ai. Ma kēia ʻatikala, e kālele mākou i ka pilina ma waena o ka mānoanoa a me ka mahana ma HPMC.
Ua wehewehe ʻia ka viscosity ma ke ʻano he ana o ke kūʻē ʻana o kahi wai i ke kahe. He mea paʻa hapa ka HPMC nona ke ana kūʻē e pili ana i nā kumu like ʻole, me ka mahana. No ka hoʻomaopopo ʻana i ka pilina ma waena o ka viscosity a me ka mahana ma HPMC, pono mua mākou e ʻike pehea i hoʻokumu ʻia ai ka mea a me ke ʻano o ia mea.
Loaʻa ka HPMC mai ka cellulose, kahi polymer kūlohelohe i nā mea kanu. No ka hana ʻana i ka HPMC, pono e hoʻololi kemika ʻia ka cellulose me ka propylene oxide a me ka methyl chloride. ʻO kēia hoʻololi ʻana ka hopena i ka hoʻokumu ʻia ʻana o nā hui hydroxypropyl a me methyl ether i loko o ke kaulahao cellulose. ʻO ka hopena he mea semi-solid hiki ke hoʻoheheʻe ʻia i loko o ka wai a me nā mea hoʻoheheʻe organik a hoʻohana ʻia i nā ʻano hana like ʻole, me ke ʻano he uhi no nā papa a me ke ʻano he mea hoʻomānoanoa no nā meaʻai, a me nā mea ʻē aʻe.
ʻO ka mānoanoa o ka HPMC e pili ana i ka nui o ka mea a me ka mahana i hōʻike ʻia ai. Ma keʻano laulā, emi ka mānoanoa o ka HPMC me ka piʻi ʻana o ka nui. ʻO ke ʻano kēia, ʻo nā nui kiʻekiʻe o ka HPMC e hopena i nā viscosities haʻahaʻa a ʻo ka hope.
Eia nō naʻe, ʻoi aku ka paʻakikī o ka pilina inverse ma waena o ka viscosity a me ka mahana. E like me ka mea i ʻōlelo ʻia ma mua, piʻi ka viscosity o HPMC me ka emi ʻana o ka mahana. ʻO ke ʻano kēia, ke hoʻokau ʻia ka HPMC i nā mahana haʻahaʻa, emi iho kona hiki ke kahe a lilo ia i ʻoi aku ka viscosity. Pēlā nō, ke hoʻokau ʻia ka HPMC i nā mahana kiʻekiʻe, piʻi kona hiki ke kahe a emi iho kona viscosity.
Aia nā kumu like ʻole e hoʻopilikia i ka pilina ma waena o ka mahana a me ka mānoanoa ma HPMC. No ka laʻana, hiki i nā mea hoʻoheheʻe ʻē aʻe i loko o ka wai ke hoʻopilikia i ka mānoanoa, e like me ka pH o ka wai. Ma ke ʻano laulā, akā naʻe, aia kahi pilina inverse ma waena o ka mānoanoa a me ka mahana ma HPMC ma muli o ka hopena o ka mahana ma ka hoʻopaʻa ʻana o ka hydrogen a me nā pilina molekala o nā kaulahao cellulose ma HPMC.
Ke hoʻohaʻahaʻa ʻia ka HPMC i nā mahana haʻahaʻa, ʻoi aku ka paʻa o nā kaulahao cellulose, kahi e alakaʻi ai i ka hoʻonui ʻia o ka hoʻopaʻa ʻana o ka hydrogen. ʻO kēia mau hoʻopaʻa hydrogen ke kumu o ke kūʻē ʻana o ka mea i ke kahe, a laila e hoʻonui ai i kona viscosity. I ka ʻaoʻao ʻē aʻe, i ka wā i hoʻohaʻahaʻa ʻia ai nā HPMC i nā mahana kiʻekiʻe, ua lilo nā kaulahao cellulose i ʻoi aku ka maʻalahi, a ua emi iho nā hoʻopaʻa hydrogen. Hoʻemi kēia i ke kūʻē ʻana o ka mea i ke kahe, a laila e emi ai ka viscosity.
He mea kūpono ke hoʻomaopopo ʻana ʻoiai he pilina inverse ma waena o ka viscosity a me ka mahana o HPMC, ʻaʻole mau kēia no nā ʻano HPMC āpau. Hiki ke ʻokoʻa ka pilina pololei ma waena o ka viscosity a me ka mahana ma muli o ke kaʻina hana a me ke ʻano kikoʻī o HPMC i hoʻohana ʻia.
He mea hana nui ka HPMC i hoʻohana nui ʻia ma nā ʻoihana like ʻole no kona mau waiwai mānoanoa a me ka emulsifying. Pili ka mānoanoa o HPMC i kekahi mau mea, me ka nui o ka mea a me ka mahana i hōʻike ʻia ai. Ma ke ʻano laulā, ua like ka mānoanoa o HPMC me ka mahana, ʻo ia hoʻi, i ka emi ʻana o ka mahana, piʻi ka mānoanoa. ʻO kēia ma muli o ka hopena o ka mahana ma ka hoʻopaʻa ʻana o ka hydrogen a me nā pilina molekala o nā kaulahao cellulose i loko o HPMC.
Ka manawa hoʻouna: Sep-08-2023