ʻOi aku ka kiʻekiʻe o ka viscosity o ka hydroxypropyl methylcellulose, ʻoi aku ka maikaʻi o ka hana paʻa wai. He mea nui ka viscosity no ka hana HPMC. I kēia manawa, hoʻohana nā mea hana HPMC like ʻole i nā ʻano a me nā mea hana like ʻole e ana i ka viscosity o HPMC. ʻO nā ala nui ʻo Haake Rotovisko, Hoppler, Ubbelohde a me Brookfield.
No ka huahana like, ʻokoʻa loa nā hopena viscosity i ana ʻia e nā ʻano hana like ʻole, a ʻoi aku ka pālua o kekahi. No laila, i ka hoʻohālikelike ʻana i nā viscosities, e ʻike pono e hana ma waena o nā ʻano hoʻokolohua like, me ka mahana, spindle, etc.
E pili ana i ka nui o nā ʻāpana, ʻoi aku ka maikaʻi o ka paʻa ʻana o ka wai. Ke hoʻopili ʻia nā ʻāpana nui o ka cellulose ether me ka wai, e hoʻoheheʻe koke ka ʻili e hana i kahi gel, kahi e hoʻopili ai i ka mea a pale i ke komo mau ʻana o nā molekole wai. . Hoʻopili nui ia i ka hopena paʻa wai o kāna cellulose ether, a ʻo ka solubility kekahi o nā kumu i ke koho ʻana i ka cellulose ether. He hōʻailona hana koʻikoʻi ka Fineness o ka methylcellulose ether. ʻO ka MC i hoʻohana ʻia i ka mortar maloʻo e koi ʻia i ka pauka, me ka haʻahaʻa haʻahaʻa haʻahaʻa, a ʻo ka fineness hoʻi e koi ai i ka 20% a i ka 60% o ka nui o ka nui e emi iho ma mua o 63um. Pili ka fineness i ka solubility o ka hydroxypropyl methylcellulose ether. ʻO ka MC koʻikoʻi ka mea maʻamau a hiki ke hoʻoheheʻe ʻia i ka wai me ka ʻole o ka caking, akā lohi ka dissolution rate, no laila ʻaʻole kūpono ia no ka hoʻohana ʻana i ka mortar maloʻo. I loko o ka mortar maloʻo, hoʻopuehu ʻia ʻo MC i nā mea cementitious e like me ka aggregate, filler fine a me ka sima. ʻO nā pauka maikaʻi wale nō ka mea e pale ai i ka methylcellulose ether mai ka hui ʻana me ka wai. Ke hoʻohui ʻo MC i ka wai e hoʻoheheʻe i nā aggregates, paʻakikī ke hoʻopuehu a hoʻoheheʻe. ʻO ka MC me ka ʻoi aku ka maikaʻi ʻaʻole wale ke kumu o ka ʻōpala, akā e hōʻemi ana i ka ikaika kūloko o ka mortar. Ke kūkulu ʻia kēia ʻano momona maloʻo ma luna o kahi nui, e hoʻemi nui ʻia ka wikiwiki o ka hoʻōla ʻana o ka hamo maloʻo kūloko, a ʻo ka haki ʻana ma muli o nā manawa hoʻōla like ʻole. No ka hoʻoheheʻe ʻana i ka mortar me ka hoʻohana ʻana i ka hana mechanical, koi ʻia ka fineness kiʻekiʻe ma muli o ka pōkole o ka manawa hui ʻana.
ʻO ka ʻōlelo maʻamau, ʻoi aku ka kiʻekiʻe o ka viscosity, ʻoi aku ka maikaʻi o ka hopena paʻa wai. Eia nō naʻe, ʻoi aku ka kiʻekiʻe o ka viscosity a me ke kaumaha molekala o MC, ʻo ka emi ʻana o ka solubility, kahi hopena maikaʻi ʻole i ka ikaika a me ka hana ʻana o ka mortar. ʻO ke kiʻekiʻe o ka viscosity, ʻoi aku ka maopopo o ka hopena mānoanoa o ka mortar, akā ʻaʻole like ia. ʻO ke kiʻekiʻe o ka viscosity, ʻoi aku ka paʻa o ka mortar pulu. E paʻa ia i ka scraper i ka wā o ke kūkulu ʻana a loaʻa ka pili kiʻekiʻe i ka substrate. Akā, he mea liʻiliʻi ia e hoʻonui ai i ka ikaika o ke kūkulu ʻana o ka mortar pulu ponoʻī. I ka wā o ke kaʻina hana, ʻaʻole maopopo ka hana anti-sag. ʻO ka ʻokoʻa, ʻo kekahi mau methylcellulose ethers haʻahaʻa haʻahaʻa akā i hoʻololi ʻia he mau waiwai maikaʻi loa i ka hoʻomaikaʻi ʻana i ka ikaika hana o nā morta pulu.
ʻOi aku ka nui o ka cellulose ether i hoʻohui ʻia i loko o ka mortar, ʻoi aku ka maikaʻi o ka mālama ʻana i ka wai, a ʻoi aku ka kiʻekiʻe o ka viscosity, ʻoi aku ka maikaʻi o ka hana paʻa wai.
ʻO ka maikaʻi o ka HPMC kekahi hopena i kona paʻa wai. ʻO ka mea maʻamau, no ka methyl cellulose ethers me ka like viscosity akā ʻokoʻa ka fineness, i ka wā e like ai ka nui o ka hoʻohui, ʻoi aku ka maikaʻi o ka maikaʻi, ʻoi aku ka maikaʻi o ka hopena paʻa wai.
ʻO ka paʻa ʻana o ka wai o HPMC pili pū me ka mahana hoʻohana. Ke emi nei ka paʻa wai o ka methylcellulose ether i ka piʻi ʻana o ka mahana. Eia nō naʻe, i nā noi waiwai maoli, hana pinepine ʻia ka mīkini maloʻo ma luna o nā substrate wela me nā mahana kiʻekiʻe (ma luna o 40 degere) i nā wahi he nui, e like me ka putty plastering ma nā paia o waho ma lalo o ka lā kauwela, e hoʻolōʻihi pinepine i ka paʻa ʻana o ka sima a me ka wehe ʻana o nā kala. sima. paakiki. Momo maloo. ʻO ka emi ʻana o ka paʻa ʻana o ka wai e hōʻike ʻia e pili ana ka hana a me ka pale ʻana i ka māwae, a he mea koʻikoʻi loa ia e hōʻemi i ka mana o nā mea wela ma lalo o ia mau kūlana. ʻOiai ke manaʻo ʻia nei nā mea hoʻohui methylhydroxyethylcellulose ether ma ke poʻo o ka hoʻomohala ʻenehana, hiki i ko lākou hilinaʻi ʻana i ka mahana ke alakaʻi i ka nāwaliwali o nā waiwai mortar maloʻo. ʻOiai ua hoʻonui ʻia ke ʻano o ka methylhydroxyethylcellulose (Xia formula), ʻaʻole hiki ke hoʻokō i nā pono o ka hoʻohana. Ma o kekahi mau lāʻau lapaʻau kūikawā, e like me ka hoʻonui ʻana i ke kiʻekiʻe o ka etherification, a me nā mea ʻē aʻe, hiki i ka MC ke mālama i ka mālama ʻana i ka wai maikaʻi ma nā mahana kiʻekiʻe, a laila e hāʻawi i ka hana maikaʻi ma lalo o nā kūlana paʻakikī.
Ka manawa hoʻouna: Feb-06-2024