He aha ka hopena o ka waiwai mālama wai o cellulose ether?

ʻO ka ʻōlelo maʻamau, ka viscosity ohydroxypropyl methylcelluloseʻoi aku ka kiʻekiʻe, akā pili pū i ke degere o ka hoʻololi ʻana a me ka degere awelika o ka hoʻololi ʻana. Hydroxypropyl methylcelluloseHe cellulose ether non-ionic me ka pauka keʻokeʻo keʻokeʻo a ʻaʻohe ʻala a ʻono ʻole, hiki ke hoʻoheheʻe ʻia i ka wai a me ka hapa nui o nā mea hoʻoheheʻe organik polar a me nā ʻāpana kūpono o ka ethanol/wai, propanol/wai, dichloroethane, etc., insoluble in acetone and absolute ethanol, pehu i loko o kahi colloid māmā a ʻeleʻele paha i loko o ka wai anuanu. He hana ili ka wai o ka wai, hana i kahi kiʻiʻoniʻoni lahilahi ma hope o ka maloʻo ʻana, e hoʻololi hou ʻia mai ka sol a i ka gel ma ke kaʻina ma ka hoʻomehana ʻana a me ka hoʻoluʻu. ʻO ke aniani kiʻekiʻe a me ka hana paʻa.

ʻO ka hydroxypropyl methylcellulose ka waiwai o ka gelation thermal. Ma hope o ka hoʻomehana ʻana o ka wai wai o ka huahana, hana ia i ka gel a hoʻoheheʻe ʻia, a hoʻoheheʻe ʻia ma hope o ka hoʻoilo. ʻOkoʻa ka mahana gelation o nā kikoʻī like ʻole. ʻokoʻa ka solubility me ka viscosity. ʻO ka haʻahaʻa o ka viscosity, ʻoi aku ka nui o ka solubility. ʻOkoʻa nā waiwai o ka hydroxypropyl methylcellulose me nā kikoʻī like ʻole. ʻAʻole pili ka hoʻoheheʻe ʻana o ka hydroxypropyl methylcellulose i ka wai e ka waiwai pH.

Nā hiʻohiʻona: Loaʻa iā ia nā hiʻohiʻona o ka hiki ke mānoanoa, ka paʻakai paʻakai, ka paʻa PH, ka paʻa ʻana o ka wai, ke kūpaʻa dimensional, ka waiwai hana kiʻiʻoniʻoni maikaʻi loa, ka laulā ākea o ke kūpaʻa enzyme, dispersibility a me ka cohesiveness.

ʻO kapaʻa waiHoʻopili pinepine ʻia nā huahana hydroxypropyl methylcellulose e nā kumu penei:

1. Kaulike o ka hydroxypropyl methylcellulose

Hoʻopili like ʻia ka hydroxypropyl methylcellulose, methoxyl a me ka hydroxypropoxyl, a ʻoi aku ka kiʻekiʻe o ka paʻa wai.

2. Hydroxypropyl methylcellulose wela gel wela

ʻOi aku ka kiʻekiʻe o ka wela gel wela, ʻoi aku ka kiʻekiʻe o ka paʻa wai; A i ʻole, ʻoi aku ka haʻahaʻa o ka paʻa wai.

3. Viscosity o ka hydroxypropyl methylcellulose

Ke piʻi ka viscosity o ka hydroxypropyl methylcellulose, piʻi pū ka nui o ka mālama ʻana i ka wai; ke piʻi ka viscosity i kahi pae, ʻoi aku ka maʻalahi o ka piʻi ʻana o ka paʻa wai.

4. ʻO ka nui o ka hydroxypropyl methylcellulose i hoʻohui ʻia

ʻOi aku ka nui o ka hydroxypropyl methylcellulose i hoʻohui ʻia, ʻoi aku ka kiʻekiʻe o ka pae paʻa wai a ʻoi aku ka maikaʻi o ka hopena paʻa wai. Ma ka laulā o ka 0.25-0.6% hoʻohui, piʻi wikiwiki ka nui o ka paʻa wai me ka hoʻonui ʻana i ka nui o ka hoʻohui; ke piʻi aʻe ka nui o ka hoʻohui, e lohi ka piʻi ʻana o ka paʻa wai.