Pehea e hoʻomaikaʻi ai i ka paʻa wai o ka hydroxypropyl methylcellulose

ʻO ka Hydroxypropyl methylcellulose ka mea hoʻohui maʻamau i hoʻohana ʻia i loko o ka mīkini lepo maloʻo. He kuleana koʻikoʻi ka cellulose ether i ka mortar pauka maloʻo. Ma hope o ka hoʻoheheʻe ʻia ʻana o ka cellulose ether i loko o ka mortar, e hōʻoia ka hana o ka ʻili i ka cementitious mea ʻO ka ʻōnaehana i hoʻokaʻawale maikaʻi ʻia, a me ka cellulose ether, ma ke ʻano he colloid pale, "wraps" i nā ʻāpana paʻa a hana i kahi papa o ka lubricating film ma kona ʻaoʻao. ili, e hoʻoikaika i ka ʻōnaehana mortar a me ka hoʻomaikaʻi ʻana i ke kahe o ka mortar i ka wā o ka hui ʻana i nā waiwai a me ka maʻalahi o ke kūkulu ʻana.

ʻO ka Hydroxypropyl methylcellulose HPMC ka paʻa wai maikaʻi loa, hiki ke pale i ka makū o ka mortar pulu mai ka evaporating prematurely a i ʻole e komo ʻia e ka papa kumu, e hōʻoiaʻiʻo ana i ka hoʻomaʻemaʻe piha ʻana o ka sima, a laila e hōʻoiaʻiʻo ai i nā waiwai mechanical o ka mortar, ʻoi aku ka maikaʻi. i nā ʻāpana lahilahi i hoʻohana ʻia ma lalo o ka mahana wela a me nā kūlana maloʻo. Hiki i ka hopena paʻa wai o ka hydroxypropyl methylcellulose ether ke hoʻololi i ke kaʻina hana kuʻuna a hoʻomaikaʻi i ka holomua o ke kūkulu ʻana. No ka laʻana, hiki ke hoʻokō ʻia ke kūkulu ʻana i ka plastering ma luna o nā substrate hoʻoheheʻe wai me ka ʻole o ka pulu.

ʻO ka viscosity, dosage, ambient temperature and molecular structure of hydroxypropyl methylcellulose HPMC he hopena nui i kāna hana mālama wai. Ma lalo o nā kūlana like, ʻoi aku ka nui o ka viscosity o cellulose ether, ʻoi aku ka maikaʻi o ka paʻa ʻana o ka wai; ʻoi aku ka kiʻekiʻe o ka dosage, ʻoi aku ka maikaʻi o ka mālama ʻana i ka wai. ʻO ka maʻamau, hiki i kahi liʻiliʻi o ka cellulose ether ke hoʻomaikaʻi nui i ka paʻa ʻana o ka wai o ka mortar. Ke piʻi ka dosage i kekahi Ke kiʻekiʻe ke degere, piʻi mālie ka nui o ka mālama ʻana i ka wai; i ka wā e piʻi aʻe ai ka wela, e emi maʻamau ka paʻa ʻana o ka wai o ka cellulose ether, akā ʻoi aku ka maikaʻi o ka mālama ʻana o ka wai ma lalo o nā kūlana kiʻekiʻe; ʻO ka cellulose me kahi haʻahaʻa haʻahaʻa o ka hoʻololi ʻana e mālama ʻo Etera i ka wai.

ʻO ka hui hydroxyl ma ka mole HPMC a me ka oxygen atom ma ka paʻa etera e hui pū me ka mole wai e hana i kahi paʻa hydrogen, e hoʻohuli i ka wai manuahi i ka wai i hoʻopaʻa ʻia, no laila ke pāʻani maikaʻi nei i ka mālama ʻana i ka wai; nā mole wai a me ka cellulose ʻO ka interdiffusion ma waena o nā kaulahao ether molecular e hiki ai i nā molekole wai ke komo i loko o nā kaulahao nui o ka cellulose ether a pili i nā mana hoʻopaʻa ikaika, pēlā e hana ai i ka wai manuahi a me ka wai i hoʻopili ʻia, e hoʻomaikaʻi ai i ka paʻa ʻana o ka wai o ka lepo; Hoʻomaikaʻi ka cellulose ether i ka paʻa ʻana o ka wai o ka hui hou ʻana. Eia naʻe, ma muli o ka maikaʻi ʻole o ka hoʻopaʻa ʻana i ka wai o ka cellulose ether o kēia manawa, ʻilihune ka hui ʻana o ka mortar a me ka maikaʻi ʻole o ka hana ʻana, a ʻoi aku ka maikaʻi o ka mortar i ka haki ʻana, hollowing a hāʻule ma hope o ke kūkulu ʻana.