He mea nui loa ka helu viscosity o ka hydroxypropyl methylcellulose. ʻAʻole hōʻike ka viscosity i ka maʻemaʻe. Pili ka viscosity o ka cellulose HPMC i ke kaʻina hana. Pono nā ʻano hoʻohana like ʻole e koho i ka cellulose HPMC me nā viscosities like ʻole, ʻaʻole ʻo ke kiʻekiʻe o ka viscosity o ka cellulose HPMC, ʻoi aku ka maikaʻi! ʻO ka mea kūpono, ʻo ia ka mea kūpono!
1. Ka hoʻomalu ʻana i ka mānoanoa
ʻAʻole hiki i ka hydroxypropyl methylcellulose kiʻekiʻe ke hana i ka cellulose kiʻekiʻe loa ma o ka vacuuming a me ka hoʻololi ʻana i ka nitrogen i ka hana ʻana. Ma ke ʻano laulā, ʻaʻole hiki ke kāohi ʻia ka hana ʻana o ka cellulose kiʻekiʻe ma Kina. Eia nō naʻe, inā hiki ke hoʻokomo ʻia kahi mika oxygen trace i loko o ka ipuhao, hiki ke kāohi ʻia ka hana ʻana o kona viscosity ma ke ʻano hana.
2. Hoʻohana ʻana i ka ʻelele hui
Eia kekahi, ke noʻonoʻo nei i ka wikiwiki o ka hoʻololi ʻana o ka naikokene, he maʻalahi ke hana i nā huahana viscosity kiʻekiʻe me ka nānā ʻole i ke ea o ka ʻōnaehana. ʻOiaʻiʻo, he mea koʻikoʻi nō hoʻi ke kekelē o ka polymerization o ka pulupulu i hoʻomaʻemaʻe ʻia. Inā ʻaʻole ia e holo pono, a laila e hana me ka hui hydrophobic. Aia nā mea hui ma kēia wahi ma Kina. He aha ke ʻano o ka mea hui e koho ai he mana nui ia i ka hana o ka huahana hope loa.
3. Ka nui o ka hydroxypropyl
ʻO ke koena o ka oxygen i loko o ka reactor ke kumu o ka hōʻino ʻana o ka cellulose a me ka emi ʻana o ke kaumaha molekala, akā ua kaupalena ʻia ke koena o ka oxygen, inā e hoʻopili hou ʻia nā molekala i haki ʻia, ʻaʻole paʻakikī ke hana i ka viscosity kiʻekiʻe. Eia nō naʻe, pili nui ka helu saturation me ka nui o ka hydroxypropyl. Makemake wale kekahi mau hale hana e hoʻemi i ke kumukūʻai a me ke kumukūʻai, akā ʻaʻole makemake e hoʻonui i ka nui o ka hydroxypropyl, no laila ʻaʻole hiki i ka maikaʻi ke hiki i ka pae o nā huahana haole like.
4. Nā kumu ʻē aʻe
He pilina maikaʻi loa ka nui o ka paʻa ʻana o ka wai o ka huahana me ka hydroxypropyl, akā no ke kaʻina hana holoʻokoʻa, hoʻoholo pū ia i kona nui o ka paʻa ʻana o ka wai, ka hopena alkalization, ka lakio o ka methyl chloride a me ka propylene oxide, ka nui o ka alkali a me ka paʻa ʻana o ka wai. ʻO ka lakio i ka pulupulu i hoʻomaʻemaʻe ʻia e hoʻoholo i ka hana o ka huahana.
Ka manawa hoʻouna: ʻApelila-04-2023