ʻO ka viscosity index o ka hydroxypropyl methylcellulose he kuhikuhi nui loa. ʻAʻole hōʻike ka viscosity i ka maʻemaʻe. ʻO ka viscosity o cellulose HPMC e pili ana i ke kaʻina hana. Pono nā wahi hoʻohana like ʻole e koho i ka HPMC cellulose me nā viscosities like ʻole, ʻaʻole ʻoi aku ka kiʻekiʻe o ka viscosity o cellulose HPMC, ʻoi aku ka maikaʻi! ʻO ka mea pono ka pololei!
1. Ka hoʻomalu viscosity
ʻAʻole hiki i ka hydroxypropyl methylcellulose viscosity kiʻekiʻe ke hoʻohua i ka cellulose kiʻekiʻe loa ma ka hoʻoheheʻe ʻana a me ka hoʻololi ʻana o ka nitrogen i ka hana. ʻO ka maʻamau, ʻaʻole hiki ke kāohi ʻia ka hana ʻana o ka cellulose kiʻekiʻe-viscosity ma Kina. Eia nō naʻe, inā hiki ke hoʻokomo ʻia kahi mika oxygen trace i loko o ka ipu hao, hiki ke hoʻohana ʻia ka hana ʻana o kona viscosity.
2. Hoʻohana i ka ʻoihana hui
Eia kekahi, e noʻonoʻo ana i ka wikiwiki o ka hoʻololi ʻana o ka nitrogen, maʻalahi ka hana ʻana i nā huahana kiʻekiʻe-viscosity ʻoiai ke ʻano o ka airtight o ka ʻōnaehana. ʻOiaʻiʻo, koʻikoʻi nō hoʻi ka pae o ka polymerization o ka pulupulu hoʻomaʻemaʻe. Inā ʻaʻole ia e hana, a laila e hana me ka hui hydrophobic. Aia nā luna hui ma kēia wahi ma Kina. ʻO ke ʻano o ka ʻoihana hui e koho ai he mana nui i ka hana o ka huahana hope.
3. Hydroxypropyl maʻiʻo
ʻO ke koena o ka oxygen i loko o ka reactor ke kumu o ka degradation o cellulose a me ka emi ʻana o ke kaumaha mole, akā ua kaupalena ʻia ke koena o ka oxygen, ʻoiai ke hoʻopili hou ʻia nā molekala haʻihaʻi, ʻaʻole paʻakikī ke hana i ka viscosity kiʻekiʻe. Eia nō naʻe, pili ka nui o ka saturation me ka ʻike o ka hydroxypropyl. Makemake wale kekahi mau hale hana e hoʻemi i ke kumukūʻai a me ke kumukūʻai, akā makemake ʻole e hoʻonui i ka ʻike o ka hydroxypropyl, no laila ʻaʻole hiki i ka maikaʻi ke hiki i ke kiʻekiʻe o nā huahana like ʻole.
4. Nā kumu ʻē aʻe
He pilina nui ka wai paʻa o ka huahana me ka hydroxypropyl, akā no ke kaʻina hana holoʻokoʻa, hoʻoholo pū ia i kona kahe paʻa wai, ka hopena alkalization, ka lākiō o ka methyl chloride a me ka propylene oxide, ka ʻike alkali a me ka paʻa wai. Hoʻoholo ka lakio i ka pulupulu hoʻomaʻemaʻe i ka hana o ka huahana.
Ka manawa kau: Apr-04-2023