ʻO ke kuleana a me ke kumu o ka mālama ʻana i ka wai o ka hydroxypropyl methylcellulose HPMC

ʻO ka Hydroxypropyl methylcellulose (HPMC) he ether non-ionic cellulose i hana ʻia mai ka cellulose material polymer maoli ma o nā kaʻina hana kemika. He pauka keʻokeʻo ʻaʻala ʻole, ʻono a ʻona ʻole e pehu ana i loko o kahi solution colloidal māmā a ʻeleʻele paha i loko o ka wai anuanu. He mānoanoa, hoʻopaʻa, dispersing, emulsifying, film-forming, suspending, adsorbing, gelling, surface active, moisture-retaining and protect colloid properties. Hiki ke hoʻohana ʻia ka Hydroxypropyl methylcellulose a me ka methylcellulose i nā mea kūkulu hale, ʻoihana pena, resin synthetic, ʻoihana ceramic, lāʻau lapaʻau, meaʻai, textile, mahiʻai, kemika o kēlā me kēia lā a me nā ʻoihana ʻē aʻe.

Hydroxypropyl methylcellulose HPMC hoohalike kemika:
[C6H7O2(OH)3-mn(OCH3)m(OCH2CH(OH)CH3)n]x

ʻO ka hopena paʻa wai a me ke kumu o ka hydroxypropyl methylcellulose HPMC:
Cellulose ether HPMCʻO ka nui o ka hana o ka paʻa ʻana o ka wai a me ka mānoanoa o ka mortar sima a me ka slurry e pili ana i ka gypsum, a hiki ke hoʻomaikaʻi maikaʻi i ka ikaika cohesive a me ka pale ʻana o ka slurry.

ʻO nā mea e like me ke ea wela, ka mahana a me ka wikiwiki o ka makani e hoʻopili i ka nui o ka volatilization o ka wai i loko o ka mortar sima a me nā huahana gypsum. No laila, i nā kau like ʻole, aia kekahi mau ʻokoʻa i ka hopena paʻa wai o nā huahana me ka nui o ka HPMC i hoʻohui ʻia. Ma ke kūkulu kikoʻī, hiki ke hoʻoponopono ʻia ka hopena paʻa wai o ka slurry ma ka hoʻonui a hoʻemi ʻana i ka nui o ka HPMC i hoʻohui ʻia. ʻO ka paʻa wai o ka methyl cellulose ether ma lalo o nā kūlana wela kiʻekiʻe he hōʻailona koʻikoʻi ia e ʻike ai i ka maikaʻi o ka methyl cellulose ether. Hiki i nā huahana HPMC maikaʻi ke hoʻoponopono i ka pilikia o ka mālama ʻana i ka wai ma lalo o ke kiʻekiʻe wela. I nā kau wela kiʻekiʻe, ʻoi aku hoʻi ma nā wahi wela a maloʻo a me ka hana ʻana i nā ʻāpana lahilahi ma ka ʻaoʻao o ka lā, pono ka HPMC kiʻekiʻe e hoʻomaikaʻi i ka paʻa ʻana o ka wai o ka slurry. Loaʻa i ka HPMC kūlana kiʻekiʻe ke kūlike. Hoʻokaʻawale like ʻia kāna mau pūʻulu methoxyl a me hydroxypropoxyl ma ke kaulahao mole cellulose, hiki ke hoʻomaikaʻi i ka hiki o nā ʻātoma oxygen ma nā paʻa hydroxyl a me ether e hui pū me ka wai e hana i nā paʻa hydrogen. , i lilo ka wai manuahi i wai paʻa, i mea e hoʻomalu pono ai i ka hoʻoheheʻe ʻana o ka wai i hoʻokumu ʻia e ke anuanu kiʻekiʻe, a loaʻa ka paʻa wai kiʻekiʻe.

High-quality cellulose HPMC hiki ke uniformly a me ka hoʻopuehu pono i loko o ka pahu sima a me ka gypsum-ma muli huahana, a hoʻopili i nā mea paʻa paʻa a pau, a hana i ka wetting kiʻiʻoniʻoni, i ka wai i loko o ke kumu ua hoʻokuʻu mālie no ka manawa lōʻihi, a me ka inorganic glue ʻO. ʻO ka hopena hydration o ka mea coagulated e hōʻoia i ka ikaika paʻa a me ka ikaika compressive o ka mea. No laila, i ke kūkulu ʻana i ke kauwela kiʻekiʻe, i mea e hoʻokō ai i ka hopena paʻa wai, pono e hoʻohui i nā huahana HPMC kiʻekiʻe i ka nui e like me ke ʻano, i ʻole, ʻaʻole lawa ka hydration, hoʻemi ʻia ka ikaika, māwae, hollowing. a me ka hoʻoheheʻe ʻana ma muli o ka maloʻo nui ʻana. nā pilikia, akā hoʻonui pū i ka paʻakikī o ka hana ʻana o nā limahana. I ka hāʻule ʻana o ka mahana, hiki ke hoʻemi ʻia ka nui o ka wai HPMC i hoʻohui ʻia, a hiki ke hoʻokō ʻia ka hopena paʻa wai like.

ʻO ka paʻa ʻana o ka wai o ka huahana hydroxypropyl methylcellulose HPMC ponoʻī e hoʻopilikia pinepine ʻia e nā kumu penei:

1. Kaulike o ka cellulose ether HPMC
Hāʻawi like ʻia ka HPMC, methoxyl a me ka hydroxypropoxyl, a ʻoi aku ka nui o ka paʻa wai.

2. Cellulose ether HPMC 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. Cellulose Etera HPMC Viscosity
Ke piʻi ka viscosity o HPMC, 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. Hoʻohui ka nui o ka cellulose ether HPMC
ʻOi aku ka nui o ka cellulose ether HPMC 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 nui o ka mālama ʻana i ka wai.