ʻO ka hui pāpaʻu, kahi e hoʻokani nei i kahi kuleana koʻikoʻi i ka hoʻomaikaʻi ʻana i ka hana o ke kūkulu ʻana i ka mortar maloʻo-hui ʻia, ʻoi aku ma mua o 40% o ke kumukūʻai o nā mea i loko o ka mortar maloʻo-hui ʻia. ʻO ka hapa nui o nā hui ʻana ma ka mākeke kūloko e hoʻolako ʻia e nā mea hana haole, a ʻo ka nui o nā huahana e hāʻawi ʻia e nā mea hoʻolako. No laila, ke kiʻekiʻe nei ke kumukūʻai o ka huahana mortar maloʻo-hui ʻia, a he paʻakikī ke hoʻolaha i ka masonry maʻamau a me ka mortar plastering me ka nui a me ka laulā. Hoʻomalu ʻia nā huahana mākeke kiʻekiʻe e nā ʻoihana haole, a he haʻahaʻa ka loaʻa kālā o nā mea hana mortar maloʻo-hui ʻia a me ke kumukūʻai haʻahaʻa; ʻaʻohe noiʻi ʻōnaehana a me ka nānā pono ʻana i ka hoʻopili ʻana o nā hui ʻana, a hahai makapō i nā ʻano haole. Eia, ʻo ka mea a mākou e kaʻana like aku ai me ʻoe, he aha ke kuleana o ka hydroxypropyl methylcellulose i loko o nā hui maʻamau o ka mortar maloʻo-hui ʻia?
ʻO ka Hydroxypropyl methylcellulose kahi ʻano cellulose nona ka hana a me ka hoʻohana ʻana e piʻi wikiwiki nei i nā makahiki i hala iho nei. Hana ʻia ka Hydroxypropyl methylcellulose me ka pulupulu i hoʻomaʻemaʻe ʻia ma hope o ka mālama ʻana i ka alkalization, me ka hoʻohana ʻana i ka propylene oxide a me ka methyl chloride ma ke ʻano he etherification agents, kahi cellulose non-ionic i hui ʻia me ka ether i hana ʻia ma o kahi moʻo o nā hopena. ʻO ke kekelē o ka hoʻololi ʻana he 1.2 ~ 2.0. He ʻokoʻa kona mau waiwai ma muli o ka lakio o ka ʻike methoxyl a me ka ʻike hydroxypropyl. ʻO nā ʻano o ka hydroxypropyl methylcellulose penei:
1. He maʻalahi ka hoʻoheheʻe ʻana o ka Hydroxypropyl methylcellulose i ka wai anuanu, a e pilikia ia i ka hoʻoheheʻe ʻana i ka wai wela. Akā, ʻoi aku ka kiʻekiʻe o kona mahana gelation i ka wai wela ma mua o ka methyl cellulose. Ua hoʻomaikaʻi nui ʻia ka solubility i ka wai anuanu i hoʻohālikelike ʻia me ka methyl cellulose.
2. Pili ka mānoanoa o ka hydroxypropyl methylcellulose i kona kaumaha molekala. ʻO ka nui o ke kaumaha molekala, ʻo ke kiʻekiʻe o ka mānoanoa. Hoʻopilikia pū ka mahana i kona mānoanoa, i ka piʻi ʻana o ka mahana, e emi ana ka mānoanoa. Eia nō naʻe, ʻoi aku ka haʻahaʻa o ka mana o kona mānoanoa kiʻekiʻe a me ka mahana ma mua o ka methyl cellulose. Paʻa kona hopena ke mālama ʻia ma ka mahana o ka lumi.
3. ʻO ka paʻa ʻana o ka wai o ka hydroxypropyl methylcellulose e pili ana i ka nui o ka hoʻohui ʻana, ka mānoanoa, a me nā mea ʻē aʻe, a ʻo kona helu paʻa wai ma lalo o ka nui hoʻohui like ʻoi aku ke kiʻekiʻe ma mua o ka methyl cellulose.
4. Paʻa ka Hydroxypropyl methylcellulose i ka waikawa a me ka alkali, a paʻa loa kona hopena wai ma ka pae pH = 2 ~ 12. ʻAʻole nui ka hopena o ka soda caustic a me ka wai lime i kāna hana, akā hiki i ka alkali ke hoʻolalelale i kona hoʻoheheʻe ʻia a hoʻonui iki i kona viscosity. Paʻa ka Hydroxypropyl methylcellulose i nā paʻakai maʻamau, akā i ka wā e kiʻekiʻe ai ka nui o ka hopena paʻakai, e piʻi aʻe ka viscosity o ka hopena hydroxypropyl methylcellulose.
5. Hiki ke kāwili ʻia ka Hydroxypropyl methylcellulose me nā polymers wai-hoʻoheheʻe ʻia e hana i kahi hopena like a ʻoi aku ka mānoanoa. E like me ka polyvinyl alcohol, starch ether, vegetable gum, a pēlā aku.
6. ʻOi aku ka maikaʻi o ke kūpaʻa ʻana o ka Hydroxypropyl methylcellulose i nā enzyme ma mua o ka methylcellulose, a ʻoi aku ka haʻahaʻa o ka hiki ke hoʻohaʻahaʻa ʻia ka enzymatic o kāna hopena ma mua o ka methylcellulose.
7. ʻOi aku ke kiʻekiʻe o ka hoʻopili ʻana o ka hydroxypropyl methylcellulose i ke kūkulu ʻana o ka mortar ma mua o ka methylcellulose.
Ka manawa hoʻouna: Mei-09-2023