ʻO ka Hydroxypropyl methyl cellulose HPMC he mea non-ionic cellulose ether i hana ʻia mai ka cellulose material polymer maoli ma o ke ʻano o ka hana kemika. He pauka keʻokeʻo ʻaʻala ʻole, ʻono a ʻona ʻole e pehu ana i loko o kahi solution colloidal maʻemaʻe a liʻiliʻi paha i loko o ka wai anuanu. Loaʻa iā ia nā hiʻohiʻona o ka mānoanoa, ka hoʻopaʻa ʻana, ka dispersion, emulsification, ka hoʻokumu ʻana i ke kiʻiʻoniʻoni, ka hoʻokuʻu ʻana, ka adsorption, ka gelation, ka hana ʻili, ka paʻa ʻana o ka wai a me ka colloid pale. Hiki ke hoʻohana ʻia ka Hydroxypropyl methylcellulose i nā mea kūkulu hale, ʻoihana uhi, resin synthetic, ʻoihana ceramic, lāʻau lapaʻau, meaʻai, textile, mahiʻai, ʻoihana kemika i kēlā me kēia lā a me nā ʻoihana ʻē aʻe.
ʻO ka hana paʻa ʻana o ka wai a me ka loina: ʻo ka cellulose ether HPMC ka mea nui o ka mālama ʻana i ka wai a me ka mānoanoa o ka mortar sima a me ka gypsum-based slurry, hiki ke hoʻomaikaʻi maikaʻi i ka ikaika hoʻopaʻa 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 ka nui like o nā huahana HPMC. 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 moʻo HPMC maikaʻi ke hoʻoponopono i ka pilikia o ka mālama ʻana i ka wai ma nā wela kiʻekiʻe. 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 ʻia kāna mau pūʻulu methoxy a me hydroxypropoxy ma ke kaulahao molekula cellulose, hiki ke hoʻomaikaʻi i ka hiki o nā ʻātoma oxygen ma nā mea 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, a laila e hoʻomalu pono i ka hoʻoheheʻe ʻana o ka wai i hoʻokumu ʻia e ka wela wela, a me ka loaʻa ʻana o ka paʻa wai kiʻekiʻe.
High-quality cellulose HPMC hiki ke uniformly a me ka hoʻopuehu maikaʻi i loko o ka pahu sima a me ka gypsum-ma muli huahana, a wahī a pau paʻa particles, a hana i ka papa o ka wetting film. Hoʻokuʻu mālie ʻia ka wai ma ke kumu no ka manawa lōʻihi. Hoʻopili ka mea condensed i ka hydration reaction, i mea e hōʻoia ai 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 o ka paʻa ʻana o ka wai, pono e hoʻohui ʻia nā huahana HPMC kiʻekiʻe i ka nui e like me ke ʻano, inā ʻaʻole, lawa ʻole ka hydration, hoʻemi ʻia ka ikaika, māwae, hollowing a hāʻule. e hana ʻia ma muli o ka maloʻo nui ʻana. ʻO nā pilikia, akā hoʻonui i ka paʻakikī o nā limahana hana. I ka emi ʻana o ka mahana, hiki ke hoʻemi ʻia ka nui o ka HPMC i hoʻohui ʻia, a hiki ke hoʻokō ʻia ka hopena paʻa wai like.
Hoʻopili ʻia ka paʻa wai o ka HPMC e nā kumu penei:
1. Homogeneity o cellulose ether HPMC
I loko o ka HPMC homogeneously reacted, ka methoxy a me ka hydroxypropoxy pūʻulu e like me ka mahele, a me ka nui o ka paʻa wai.
2. Thermal gel wela o cellulose ether HPMC
He kiʻekiʻe ka mahana wela o ka gel, kiʻekiʻe ka nui o ka mālama ʻana i ka wai; akā, he haʻahaʻa ka paʻa wai.
3. Viscosity o cellulose ether HPMC
Ke piʻi ka viscosity o HPMC, piʻi pū ka nui o ka mālama ʻana i ka wai; ke piʻi ka viscosity i kahi pae, ʻo ka piʻi ʻana o ka nui o ka mālama ʻana i ka wai e pālahalaha.
4. Hoʻohui i 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, e piʻi wikiwiki ka nui o ka mālama ʻana i ka wai me ka piʻi ʻana o 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.
Ka manawa hoʻouna: Dec-16-2021