ʻO Hydroxypropylmethylcellulose (HPMC) kekahi o nā mea maʻamau i hoʻohana ʻia i ka ʻoihana lāʻau lapaʻau a me nā ʻoihana meaʻai a me ka ʻoihana kūkulu. ʻO kekahi o nā pōmaikaʻi nui o HPMC ʻo kona hiki ke mālama i ka wai, kahi e kūpono ai ia no nā ʻano noi like ʻole. Hoʻopili ʻia ka hana paʻa wai o HPMC e nā kumu he nui, me ka viscosity, content, ambient temperature and molecular structure.
viscosity
ʻO kekahi o nā kumu nui e pili ana i ka hana paʻa wai o HPMC ʻo kona viscosity. ʻO ka viscosity e pili ana i ka mānoanoa a i ʻole ke kūʻē ʻana i ke kahe o kahi mea. No HPMC, ʻoi aku ka kiʻekiʻe o ka viscosity, ʻoi aku ka kiʻekiʻe o ka paʻa wai.
ʻOi aku ka kiʻekiʻe o ka viscosity HPMC he kiʻekiʻe ke kaumaha molekala, ʻo ia hoʻi nā kaulahao polymer lōʻihi. ʻOi aku ka paʻakikī o nā kaulahao lōʻihi i ka neʻe ʻana o nā molekala wai ma o ka mea. ʻO kēia ka hopena i ka paʻa ʻana o ka wai i ka wā e paʻa ai nā molekole wai i loko o ka matrix polymer, kahi e hoʻonui ai i ka ikaika holoʻokoʻa o ka matrix.
maʻiʻo
ʻO kekahi kumu e pili ana i ka hana mālama wai o HPMC ʻo ia ka ʻike. Aia ka HPMC i ʻelua mau mea nui me nā pae like ʻole o ka hydrophilicity, ʻo ia hoʻi methoxyl a me hydroxypropyl. ʻOi aku ka kiʻekiʻe o ka hydroxypropyl content i HPMC, ʻoi aku ka nui o ka hiki ke mālama i ka wai.
Hoʻoholo ka hui hydroxypropyl i HPMC i kāna hana mālama wai. Hoʻopili kēia mau pūʻulu a paʻa i nā mole wai, e hoʻohūhū ai ka HPMC. Kōkua kēia pehu i ka hana ʻana i mea pale e hoʻolohi i ka hoʻokuʻu ʻana o ka wai mai HPMC. ʻO nā pūʻulu Methoxy, ma ka ʻaoʻao ʻē aʻe, ʻaʻole like ka hydrophilic e like me nā pūʻulu hydroxypropyl a no laila ʻaʻole kōkua nui i ka hiki ke mālama i ka wai.
ka wela ambient
ʻO ka wela ambient kekahi mea e pili ana i ka hana mālama wai o HPMC. Ke piʻi aʻe ka mahana, e emi ana ka mana mālama wai o HPMC. Hana ʻia kēia no ka mea ma nā wela kiʻekiʻe, ʻoi aku ka nui o ka ikehu kinetic o nā kaulahao polymer o HPMC, a ʻoi aku ka wikiwiki o lākou. No laila, ua hoʻokuʻu ʻia nā mole wai mai ka polimer matrix. Eia kekahi, ma nā haʻahaʻa haʻahaʻa, paʻa paʻa nā molekala wai i loko o ka matrix HPMC, e hopena i ka paʻa wai kiʻekiʻe.
No laila, he mea koʻikoʻi ka mālama ʻana i ka mahana ambient i ka wā o ke kaʻina hana e hōʻoia i ka hana paʻa ʻana o ka wai.
Hoʻolālā Molecular
Hoʻopili pū ʻia ka mana paʻa wai o HPMC e kona ʻano molekala. Hoʻoholo ʻia ke ʻano mole o HPMC e ka degere o ka hoʻololi ʻana (DS) a me ka hāʻawi ʻana i ke kaumaha.
ʻO ke degere o ka hoʻololi ʻana e pili ana i ka pae i hoʻololi ʻia nā pūʻulu hydroxyl o cellulose e nā hui hydroxypropyl. ʻO ka HPMC me kahi kūlana kiʻekiʻe o ka hoʻololi ʻana he ʻoi aku ka nui o ka hiki ke mālama i ka wai. ʻO ka hoʻohālikelike, ʻo HPMC me kahi haʻahaʻa haʻahaʻa o ka hoʻololi ʻana he haʻahaʻa haʻahaʻa ka hiki ke mālama i ka wai.
Hoʻopili pū ka puʻunaue kaumaha molekala o HPMC i ka hiki ke paʻa wai. ʻOi aku ka kiʻekiʻe o ka paona molekala, ʻoi aku ka kiʻekiʻe o ka hiki ke mālama i ka wai, no ka mea, ʻoi aku ka nui o nā molekala i kahi ʻano matrix ʻoi aku ka paʻa o ka wai.
i ka hopena
He mea pono loa ka HPMC ma muli o kona mau waiwai mālama wai. ʻO ka mana paʻa wai o HPMC pili pono i kona viscosity, content, ambient temperature and molecular structure. No laila, ʻo ke koho ʻana i ka HPMC kūpono no kahi noi kikoʻī pono e noʻonoʻo pono i kēia mau mea. Ma ke ʻano holoʻokoʻa, ʻoi aku ka maikaʻi o ka HPMC i ka maikaʻi a me ka maikaʻi o nā ʻano huahana like ʻole ma nā ʻoihana like ʻole, me nā lāʻau lapaʻau, nā meaʻai, a me ke kūkulu ʻana.
Ka manawa hoʻouna: ʻAukake-30-2023