Hydroxypropyl methylcellulosehe cellulose ether maoli, ʻaʻole ia e pōʻino i ke kino o ke kanaka. Eia naʻe, ʻo nā mea maka o ka pulupulu linters a me ka HPMC i hoʻohana ʻia i loko o ka hale hana he alo a pau, no ka mea, e loaʻa kēia i ka hopena o ka lepo, a ʻaʻole ʻino nā mea ʻē aʻe.
ʻO ka Hydroxypropyl methylcellulose ʻaʻohe mea ʻawaʻawa. Manaʻo ʻia ʻo Cellulose he kūpono a ua hana ʻia me ka hoʻohana ʻana i nā fibers kūlohelohe ma o ka hui ʻana o ka alkali, ka pane grafting, ka holoi ʻana, ka maloʻo ʻana, ka wili a me nā kaʻina hana ʻē aʻe. ʻAʻole e hoʻopilikia i ke olakino o nā kānaka.
ʻO ka hydroxypropyl methyl cellulose, i ʻike ʻia ʻo hypromellose a me cellulose hydroxypropyl methyl ether, i hana ʻia ma ka hoʻohana ʻana i ka pulupulu maʻemaʻe maʻemaʻe ma ke ʻano he mea maka a me ka hoʻomaʻamaʻa kūikawā ma lalo o nā kūlana alkaline.
ʻO ka synthesis o ka hydroxypropyl methylcellulose: mālama ʻia ka pulupulu i hoʻomaʻemaʻe ʻia me ka lye ma 35-40 ℃ no ka hapalua hola, ʻoki ʻia, ʻoki ʻia ka cellulose, a lawe ʻia ka ʻelemakule ma 35 ℃ e hana i ka fiber alkali i loaʻa i ka polymerized. I loko o ka laulā i makemake ʻia. E hoʻokomo i ka fiber alkali i loko o ka ipu etherification, e hoʻohui i ka propylene oxide a me ka methyl chloride i ke kaʻina, a etherify ma 50-80 ℃ no 5h, a ʻo ke kaomi kiʻekiʻe e pili ana i 1.8MPa. A laila e hoʻohui i ka nui kūpono o ka waika hydrochloric a me ka waikawa oxalic e holoi i nā mea i ka wai wela ma 90 ° C e hoʻonui i ka nui a me ka nui. Dehydrate ma ka centrifugation. Swash i kūʻole. Ke emi ka wai i loko o ka mea ma lalo o 60%, e hoʻomaloʻo iā ia me ke kahe o ka ea wela ma 130 ° C a hiki i kahi mea ma lalo o 5%.
ʻO ka HPMC i hana ʻia e ke ʻano solvent e hoʻohana i ka toluene a me ka isopropanol e like me ka solvent. Inā ʻino loa ka holoi ʻana, ʻaʻala iki ke koena. He pilikia kēia o ke kaʻina hana holoi, ʻaʻole pili i ka hoʻohana a i ʻole kekahi pilikia.
ʻO Hypromellose kahi pulupulu i hoʻomaʻemaʻe ʻole ʻia me ka wai e loaʻa ai ka cellulose alkaline, a laila komo i nā solvents, etherification agents, toluene a me isopropanol no ka etherification reactions, a ua neutralized, holoi ʻia, maloʻo, a paʻi ʻia no ka loaʻa ʻana o nā huahana. ʻino loa a pilau, no laila hiki i nā mea hoʻohana ke hoʻohana iā ia i kahi ʻano paʻa.
Pono ka Hydroxypropyl methylcellulose e hoʻolohe i nā mea i loko o ka noi:
I ka hopena o ka lepo lepo, hydroxypropyl methylcellulose wale nō ke pāʻani i kahi hopena kākoʻo, a ʻaʻole komo i kekahi hopena kemika. Hoʻohui ʻia ka lepo lepo me ka wai a kau ʻia ma ka paia, ʻo ia ka hopena kemika. Ma muli o ka hoʻokumu ʻia ʻana o nā mea hou, ua wehe ʻia ka lepo lepo ma luna o ka pā mai ka pā a hoʻoheheʻe ʻia a lilo i pauda i mea hou. ʻO ka Hydroxypropyl methylcellulose wale nō ka mālama i ka wai a kōkua i ka calcium hina e loaʻa i kahi pane maikaʻi, akā ʻaʻole ia e komo i kekahi pane.
ʻAʻole komo ʻo Hydroxypropyl Methyl Cellulose HPMC i kekahi hopena kemika, akā kōkua wale nō. E hoʻohui i ka wai i ka pauka lepo a kau ma ka paia, he hopena kemika. Ma muli o ka hoʻokumu ʻana i nā mea hou, ua hoʻoneʻe ʻia ka lepo lepo ma luna o ka pā mai ka pā a lepo i lepo, a laila ʻaʻole hiki, no ka mea, ua hana ʻia nā mea hou NS. ʻO nā mea nui o ka pauka calcium hina: Ca(OH)2, kahi hui o CaO a me kahi liʻiliʻi o CaCO3, CaO
H2O=Ca（OH）2-Ca（OH）2 CO2=CaCO3↓ H2O
Hoʻopuka ka calcium hina i nā mea ʻē aʻe ma lalo o ka hopena o ka wai a me CO2 i ka lewa, ʻoiai ʻo HPMC e paʻa wale i ka wai a kōkua i ka calcium hina e loaʻa kahi pane maikaʻi. ʻAʻole ia e komo i kekahi pane.
ʻO ka Hydroxypropyl methyl cellulose ka nui o ka hoʻohana. I ke ola o kēlā me kēia lā, nui nā huahana i hiki ʻole ke hoʻokaʻawale ʻia mai ka hana hana. A laila, ma nā ʻoihana like ʻole, he aha ka hopena o ka hydroxypropyl methylcellulose, e wehewehe wau iā ʻoe, i hiki iā ʻoe ke pale i ka hoʻohana hewa ʻana i ka wā e loaʻa ai ka ʻike.
ʻO ka mea mua, i ka ʻoihana kūkulu, hiki ke manaʻo ʻia he mea hoʻopaʻa a me ka mea mālama wai. ʻO ka mortar mortar hiki ke pumpable, no laila, ʻo nā mortar maloʻo a pau a mākou e hoʻohana ai, loaʻa kona komo. Eia kekahi, i loko o nā mea hana e like me ka gypsum raw, plaster, a me ka lepo lepo, hiki ke hoʻohana ʻia e like me ka mea hoʻopaʻa, ʻaʻole ia e hoʻolōʻihi i ka manawa no ka hana, akā e hoʻomāhuahua i ka pena. I loko o ke kinikini, adhesive ceramic tiles, molecular compound plastic decors, hiki ke hoʻohanaʻia e like me ka mea hoʻonui adhesion, a me nā mea'ē aʻe.
Ma nāʻoihana'ē aʻe, e like me ka porcelain a me ka hanaʻana i ka ipu lepo, hiki ke hoʻohanaʻia e like me ka mea hoʻopili no ka hanaʻana i ka porcelain a me nā mea kanu; i ka ʻoihana lacquer a me ka paʻi ʻīnika, hiki ke hoʻohana ʻia e like me ka pauka wehe, mānoanoa, stabilizer, a no ka mea hiki ke hui pū ʻia me ka organik Solvent a hui pū ʻia ka wai, a hiki ke hoʻohana ʻia e like me ka wehe ʻana i ka pena i ka hana ʻana i nā plastic compound molecular. , a me nā mea palupalu, nā mea hoʻokuʻu mold, lubricants, etc.; i ka hana ʻana i ka polyvinyl chloride, ua manaʻo ʻia ʻo ia he pauka manuahi.
Hoʻohana nui ʻia nā huahana i hana ʻia me ka hydroxypropyl methylcellulose i ka hou o nā huaʻai a me nā mea kanu, nā lāʻau lapaʻau, nā ʻili holoholona a me nā ʻoihana textile. He palekana a ʻaʻole ʻawaʻawa, ʻaʻole hoʻonāukiuki loa i nā ʻili a me nā ʻili o ke kino o ke kanaka, a hiki ke hoʻohana ʻia ma ke ʻano he meaʻai. Eia naʻe, ma ke kūlana maoli o ka mea, hiki i kona lepo ke hoʻohaumia i ka ea, a ʻaʻole pono i ka mālama ʻana i ka ʻili ke hoʻokaʻawale iā ia mai ke ahi e pale aku i ka pahū.
paʻa wai
ʻO ka hydroxypropyl methylcellulose kūikawā no ke kūkulu ʻana e pale i ka hoʻohana nui ʻana o ka wai e ka substrate, a pono e mālama ʻia ka wai i loko o ka plaster e like me ka hiki i ka manawa i hoʻonohonoho pono ʻia ka gypsum. Ua kapa ʻia kēia waiwai kūikawā i ka mālama ʻana i ka wai a pili pono i ka viscosity o ka solution hydroxypropyl methylcellulose i hoʻohana ʻia no ke kūkulu ʻana i ka plaster. ʻO ke kiʻekiʻe o ka viscosity solution, ʻoi aku ka kiʻekiʻe o ka ʻike paʻa wai.
Anti-sagging
Hiki ke hoʻohana ʻia ka mortar me nā waiwai kūikawā o ka anti-sagging me kahi uhi ʻoi aku ka mānoanoa me ka ʻole o ka sagging, ʻo ia hoʻi ʻaʻole e hoʻololi ka mortar ponoʻī i kāna kāne, inā ʻaʻole ia e paheʻe i lalo i ka wā e hoʻomaka ai ke kūkulu ʻana.
E ho'ēmi i ka viscosity a maʻalahi ke kūkulu
Ma hope o ka hoʻohui ʻana i nā huahana hydroxypropyl methylcellulose kikoʻī i kūkulu ʻia, hiki ke hana ʻia ka plaster gypsum ʻōmaʻomaʻo me kahi ʻano haʻahaʻa haʻahaʻa. Ke manaʻo ʻia he kūpono a hoʻohana ʻia kahi papa haʻahaʻa haʻahaʻa o ka hydroxypropyl methylcellulose i kūkulu ʻia, Hoʻemi ʻia ke kiʻekiʻe o ka viscosity a maʻalahi ke kūkulu ʻana. Eia naʻe,ʻo ka paʻaʻana o ka wai o ka hydroxypropyl methylcellulose no ka hana haʻahaʻa-viscosity he mea nāwaliwali ia, a he mea pono e hoʻonui i ka nui o ka hoʻohui.
Laki hoʻopili palaki
No ka nui o ka mīkini paʻa maloʻo, ʻoi aku ka maikaʻi o ka hana ʻana i ka nui o ka nui o ka mortar pulu, hiki ke hoʻokō ʻia me ka hoʻohui ʻana i kahi wai liʻiliʻi a me nā ʻōpū. Eia nō naʻe, inā lōʻihi ka nui o ka wai a me nā ʻōhū, pilikia ka ikaika.
Ka manawa hoʻouna: Apr-26-2024