ʻO Hydroxypropyl methylcellulose (HPMC) kahi ʻetera cellulose non-ionic i hana ʻia mai ka cellulose mea polymer kūlohelohe ma o kahi moʻo o nā kaʻina hana kemika. He pauka keʻokeʻo ʻala ʻole, ʻono ʻole a ʻaʻohe ʻawaʻawa e pehu ana i loko o kahi hopena colloidal maopopo a ʻeleʻele iki paha i ka wai anuanu. Loaʻa iā ia nā waiwai colloidal mānoanoa, hoʻopaʻa, hoʻopuehu, emulsifying, hana kiʻiʻoniʻoni, hoʻokuʻu, adsorbing, gelling, hana ʻili, mālama wai a pale. Hiki ke hoʻohana ʻia ʻo Hydroxypropyl methyl cellulose a me methyl cellulose i nā mea kūkulu hale, ʻoihana pena, resin synthetic, ʻoihana keramika, lāʻau lapaʻau, meaʻai, lole, mahiʻai, kemika o kēlā me kēia lā a me nā ʻoihana ʻē aʻe.
Ka hopena paʻa wai a me ke kumumanaʻo o ka hydroxypropyl methylcellulose HPMC
ʻO ka Cellulose Ether HPMC ke kuleana nui o ka paʻa ʻana o ka wai a me ka mānoanoa i loko o ka sima lepo a me ka slurry gypsum-based, a hiki ke hoʻomaikaʻi pono i ka ikaika cohesive a me ke kūpaʻa ʻana o ka slurry.
ʻO nā mea e like me ka mahana o ka ea, ka mahana a me ka wikiwiki o ke kaomi makani e hoʻopilikia i ka nui o ka volatilization o ka wai i loko o ka sima 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 like o ka HPMC i hoʻohui ʻia. I ke kūkulu kikoʻī, hiki ke hoʻoponopono ʻia ka hopena paʻa wai o ka slurry ma ka hoʻonui ʻana a i ʻole ka 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 hoʻokaʻawale i ka maikaʻi o ka methyl cellulose ether. Hiki i nā huahana moʻo HPMC maikaʻi loa ke hoʻoponopono pono i ka pilikia o ka paʻa wai ma lalo o ka mahana kiʻekiʻe. I nā kau wela kiʻekiʻe, ʻoi aku hoʻi i nā wahi wela a maloʻo a me ke kūkulu ʻana i ka papa lahilahi ma ka ʻaoʻao lā, pono ka HPMC kiʻekiʻe e hoʻomaikaʻi i ka paʻa wai o ka slurry. He ʻano like maikaʻi loa ka HPMC kiʻekiʻe. Hoʻolaha like ʻia kāna mau hui methoxy a me hydroxypropoxy ma ke kaulahao molekala cellulose, hiki ke hoʻomaikaʻi i ka hiki o nā ʻātoma oxygen ma nā pilina hydroxyl a me ether e hui pū me ka wai e hana i nā pilina hydrogen. , i lilo ai ka wai manuahi i wai paʻa, i mea e kaohi pono ai i ka mahu ʻana o ka wai i hoʻokumu ʻia e ke aniau wela kiʻekiʻe, a hoʻokō i ka paʻa ʻana o ka wai kiʻekiʻe.
Hiki ke hoʻopuehu like ʻia ka HPMC cellulose kiʻekiʻe a me ka maikaʻi i loko o ka sima sima a me nā huahana gypsum, a kāʻei i nā ʻāpana paʻa a pau, a hana i kahi kiʻiʻoniʻoni pulu, e hoʻokuʻu mālie ʻia ka makū i loko o ke kumu no ka manawa lōʻihi, a ʻo ka hopena hydration o ka mea i hoʻopaʻa ʻia e hōʻoia i ka ikaika o ka hoʻopaʻa ʻana a me ka ikaika compressive o ka mea. No laila, i ke kūkulu ʻana i ke kauwela wela kiʻekiʻe, i mea e hoʻokō ai i ka hopena paʻa wai, pono e hoʻohui i nā huahana HPMC kiʻekiʻe i nā nui lawa e like me ke ʻano, inā ʻaʻole, ʻaʻohe lawa o ka hydration, hoʻemi ʻia ka ikaika, haki, hollowing a me ka hoʻokahe ʻana i hoʻokumu ʻia e ka maloʻo nui. nā pilikia, akā hoʻonui pū i ka paʻakikī o ke kūkulu ʻana o nā limahana. I ka hāʻule ʻana o ka mahana, hiki ke hoʻemi mālie 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 aʻe:
Ua hoʻokaʻawale like ʻia ka HPMC, methoxyl a me ka hydroxypropoxyl, a kiʻekiʻe ka nui o ka paʻa ʻana o ka wai;
Kiʻekiʻe ka mahana o ka gel wela o ka cellulose ether HPMC, kiʻekiʻe ka nui o ka mālama ʻana i ka wai; inā ʻaʻole, haʻahaʻa ka nui o ka mālama ʻana i ka wai;
Ke piʻi ka mānoanoa o ka cellulose ether HPMC, piʻi pū ka nui o ka paʻa ʻana o ka wai; ke hiki ka mānoanoa i kahi pae, ʻo ka piʻi ʻana o ka nui o ka paʻa ʻana o ka wai e akahai;
ʻO ka nui o ka cellulose ether HPMC i hoʻohui ʻia, ʻo ke kiʻekiʻe o ka nui o ka paʻa ʻana o ka wai a ʻoi aku ka maikaʻi o ka hopena paʻa wai. Ma ka pae o 0.25-0.6% hoʻohui, piʻi koke ka nui o ka paʻa ʻana o ka wai me ka hoʻonui ʻana o ka nui o ka hoʻohui; i ka wā e piʻi hou ai ka nui o ka hoʻohui, lohi ka piʻi ʻana o ka nui o ka paʻa ʻana o ka wai.
Ka manawa hoʻouna: Iune-01-2023