He aha ka HPMC?He aha ka MC?

ʻO ka HPMC ka hydroxypropyl methylcellulose, ʻo ia ka non-ionic cellulose i hui ʻia eter i hana ʻia mai ka pulupulu hoʻomaʻemaʻe ma hope o ka alkalization, me ka hoʻohana ʻana i ka propylene oxide a me ka methyl chloride ma ke ʻano he etherification agents, a ma o ke ʻano o nā hopena.ʻO ka pae o ka hoʻololi ʻana he 1.2-2.0.He ʻokoʻa kona mau waiwai ma muli o nā ʻano like ʻole o ka methoxyl content a me ka hydroxypropyl content.

ʻO ka MC ka methyl cellulose, ka mea i hana ʻia me ka cellulose ether ma o ka mālama ʻana i ka pulupulu i hoʻomaʻemaʻe ʻia me ka alkali, me ka hoʻohana ʻana i ka methane chloride ma ke ʻano he etherification agent, a me ka hele ʻana i nā ʻano hopena.ʻO ka maʻamau, ʻo ka degere o ka hoʻololi ʻana he 1.6 ~ 2.0, a ʻokoʻa hoʻi ka solubility me nā pae like ʻole o ka hoʻololi.No ka non-ionic cellulose ether.

(1) Hiki ke hoʻoheheʻe ʻia ka Hydroxypropyl methylcellulose i ka wai anuanu, a e loaʻa iā ia nā pilikia i ka hoʻoheheʻe ʻana i ka wai wela.Akā ʻoi aku ka kiʻekiʻe o ka mahana o ka gelation i ka wai wela ma mua o ka methyl cellulose.Hoʻomaikaʻi maikaʻi ʻia ka solubility i ka wai anuanu ke hoʻohālikelike ʻia me ka methyl cellulose.ʻO ka Hydroxypropyl methylcellulose paʻa i ka waika a me ka alkali, a paʻa loa kona hopena wai i ka pae o ka pH = 2 ~ 12.He liʻiliʻi ka hopena o ka soda a me ka wai lime i kāna hana, akā hiki i ka alkali ke wikiwiki i kona hoʻoheheʻe ʻana a hoʻonui i kona viscosity.He kūpaʻa ka Hydroxypropyl methylcellulose i nā paʻakai maʻamau, akā ke kiʻekiʻe ka paʻakai o ka paʻakai, piʻi ka viscosity o ka hydroxypropyl methylcellulose solution.

Hiki ke hoʻoheheʻe ʻia ka Methylcellulose i ka wai anuanu, a paʻakikī ke hoʻoheheʻe ʻia i ka wai wela.Paʻa loa kona hopena wai i ka pae o pH=3~12.He kūpono maikaʻi me ka starch, guar gum, etc. a me nā surfactants he nui.Ke piʻi ka mahana i ka mahana gelation, puka ka gelation.

(2) ʻO ka viscosity o ka hydroxypropyl methylcellulose e pili ana i kona kaumaha mole, a ʻoi aku ka nui o ke kaumaha mole, ʻoi aku ka kiʻekiʻe o ka viscosity.Hoʻopili ka mahana i kona viscosity, i ka piʻi ʻana o ka mahana, emi ka viscosity.Eia nō naʻe, ʻoi aku ka haʻahaʻa o kona viscosity kiʻekiʻe ma mua o ka methyl cellulose.Paʻa kona hopena ke mālama ʻia ma ka lumi wela.

He hopena koʻikoʻi ka Methylcellulose i ka hana a me ka pili ʻana o ka mortar.ʻO ka "adhesion" ma aneʻi e pili ana i ka ikaika pipili i manaʻo ʻia ma waena o ka mea hoʻopili a ka mea hana a me ke pani o ka pā, ʻo ia hoʻi, ka pale ʻana o ka mortar.He kiʻekiʻe ka adhesiveness, nui ka pale ʻana o ka mortar, a ʻo ka ikaika i koi ʻia e ka poʻe hana i ka hana o ka hoʻohana ʻana he nui nō hoʻi, a ʻo ka hana ʻana o ka mortar he ʻilihune.Aia ka methyl cellulose adhesion ma kahi pae haʻahaʻa i nā huahana cellulose ether.

(3) ʻO ka paʻa ʻana o ka wai o ka hydroxypropyl methylcellulose e pili ana i kona nui hoʻohui, viscosity, a me nā mea ʻē aʻe, a ʻoi aku ka kiʻekiʻe o ka paʻa ʻana o ka wai ma lalo o ka nui hoʻohui like ma mua o ka methyl cellulose.

ʻO ka paʻa ʻana o ka wai o ka methylcellulose e pili ana i kona nui hoʻohui, viscosity, particle fineness and dissolution rate.ʻO ka maʻamau, inā nui ka hoʻohui, liʻiliʻi ka fineness, a nui ka viscosity, kiʻekiʻe ka nui o ka paʻa ʻana o ka wai.I waena o lākou, ʻo ka nui o ka hoʻohui i ka hopena nui loa i ka nui o ka mālama ʻana i ka wai, a ʻaʻole kūlike ka pae o ka viscosity i ke kiʻekiʻe o ka paʻa wai.ʻO ka nui o ka hoʻoheheʻe ʻana ma muli o ke ʻano o ka hoʻololi ʻana o ka ʻili o nā ʻāpana cellulose a me ka fineness.Ma waena o nā cellulose ethers ma luna, ʻo ka methyl cellulose a me ka hydroxypropyl methyl cellulose i ʻoi aku ka nui o ka paʻa wai.

(4) Hiki ke hoʻohui ʻia ka Hydroxypropyl methylcellulose me nā pūhui polymer hiki ke hoʻoheheʻe ʻia i ka wai e hana i kahi ʻano like ʻole a ʻoi aku ka viscosity solution.E like me ka polyvinyl alcohol, starch ether, vegetable gum, etc. ʻOi aku ka kiʻekiʻe o ka hoʻopili ʻana o ka hydroxypropyl methylcellulose i ka hana pahū ma mua o ka methylcellulose.

Hydroxypropyl methylcelluloseHPMCʻoi aku ka maikaʻi o ke kūpaʻa ʻana i ka enzyme ma mua o ka methylcellulose, a ʻoi aku ka liʻiliʻi o kona hopena e nā enzymes ma mua o ka methylcellulose.

Hiki ke hoʻololi koʻikoʻi i ka paʻa ʻana o ka wai o ka methyl cellulose.ʻO ka maʻamau, ʻoi aku ka kiʻekiʻe o ka mahana, ʻoi aku ka maikaʻi o ka paʻa ʻana o ka wai.Inā ʻoi aku ka mahana o ka mortar ma mua o 40 ° C, e hoʻemi nui ʻia ka paʻa ʻana o ka wai o ka methyl cellulose, e hoʻopilikia nui i ke kūkulu ʻana i ka mortar.Ke kiʻekiʻe ka mahana, e hoʻāʻo e koho i ka hydroxypropyl methylcellulose.