Hydroxypropyl methylcellulosehe ʻea cellulose kūlohelohe ia, ʻaʻole ia he mea ʻino i ke kino o ke kanaka. Eia nō naʻe, ʻo nā mea maka o nā linters pulupulu a me HPMC i hoʻohana ʻia i ka hale hana he maka maka āpau, no ka mea, e loaʻa kēia i ka hopena o ka lepo, a ʻo nā mea ʻē aʻe ʻaʻole ia he mea ʻino.
ʻAʻohe mea ʻawahia o ka Hydroxypropyl methylcellulose. Ua manaʻo ʻia he kūpono ka Cellulose a hana ʻia ma ka hoʻohana ʻana i nā olonā kūlohelohe ma o ka alkali fusion, grafting response, holoi ʻana, hoʻomaloʻo ʻana, wili ʻana a me nā kaʻina hana ʻē aʻe. ʻAʻole ia e hoʻoweliweli i ke olakino o kānaka.
ʻO ka Hydroxypropyl methyl cellulose, i ʻike ʻia hoʻi ʻo hypromellose a me cellulose hydroxypropyl methyl ether, ua hana ʻia ma ka hoʻohana ʻana i ka cellulose pulupulu maʻemaʻe loa ma ke ʻano he mea maka a ke hana ʻia nei i ka etherification kūikawā ma lalo o nā kūlana alkaline.
ʻO ka hana ʻana o ka hydroxypropyl methylcellulose: mālama ʻia ka cellulose pulupulu i hoʻomaʻemaʻe ʻia me ka lye ma 35-40 ℃ no ka hapalua hola, kaomi ʻia, kuʻi ʻia ka cellulose, a lawe ʻia ka ʻelemakule ma 35 ℃ e hana i ka polymerized like ʻana o ka fiber alkali i loaʻa. I loko o ka pae i koi ʻia. E kau i ka fiber alkali i loko o ka ipuhao etherification, e hoʻohui i ka propylene oxide a me ka methyl chloride ma ke kaʻina, a etherify ma 50-80 ℃ no 5h, a ʻo ke kaomi kiʻekiʻe ma kahi o 1.8MPa. A laila e hoʻohui i ka nui kūpono o ka hydrochloric acid a me ka oxalic acid e holoi i nā mea i loko o ka wai wela ma 90°C e hoʻonui i ka nui a me ka nui. Dehydrate ma o centrifugation. Holoi i ka neutral. Ke emi ka nui o ka wai i loko o ka mea ma mua o 60%, e hoʻomaloʻo me kahi kahawai o ka ea wela ma 130°C i kahi ʻike ma lalo o 5%.
Hoʻohana ka HPMC i hana ʻia e ke ʻano solvent i ka toluene a me ka isopropanol ma ke ʻano he solvent. Inā holoi maikaʻi ʻole ʻia, e loaʻa iā ia kahi ʻala iki i koe. He pilikia kēia o ke kaʻina holoi, ʻaʻole ia e hoʻopilikia i ka hoʻohana a i ʻole kekahi pilikia.
He pulupulu i hoʻomaʻemaʻe ʻia ka Hypromellose i hoʻomaʻū pinepine ʻia me ka wai e loaʻa ai ka cellulose alkaline, a laila komo i loko o nā mea hoʻoheheʻe, nā mea etherification, toluene a me isopropanol no nā hopena etherification, a ua hoʻopau ʻia, holoi ʻia, hoʻomaloʻo ʻia, a kuʻi ʻia e loaʻa ai nā huahana i hoʻopau ʻia. He mea ʻino loa a pilau hoʻi, no laila hiki i nā mea hoʻohana ke hoʻohana iā ia me ke ʻano paʻa.
Pono ka Hydroxypropyl methylcellulose e hoʻolohe i nā mea aʻe i ka noi:
I ka hopena o ka pauka lepo, hoʻokani wale ka hydroxypropyl methylcellulose i kahi hopena kākoʻo, ʻaʻole ia e komo i kekahi hopena kemika. Hoʻohui ʻia ka pauka lepo me ka wai a kau ʻia ma ka paia, he hopena kemika ia. Ma muli o ke kūkulu ʻia ʻana o nā mea hou, ua wehe ʻia ka pauka lepo ma ka paia mai ka paia a wili ʻia i pauka e hana i nā mea hou. Hoʻopaʻa wale ka Hydroxypropyl methylcellulose i ka wai a kōkua i ka calcium hina e loaʻa kahi pane maikaʻi aʻe, 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 luna o ka paia, he hopena kemika ia. Ma muli o ke kūkulu ʻia ʻana o nā mea hou, ua wehe ʻia ka pauka lepo ma ka paia mai ka paia a wili ʻia i pauka, a laila ʻaʻole hiki, no ka mea, ua hoʻokumu ʻia nā mea hou NS. ʻO nā ʻāpana nui o ka pauka calcium hina: Ca(OH)2, kahi hui ʻana o CaO a me kahi liʻiliʻi o CaCO3, CaO
H2O=Ca（OH）2-Ca（OH）2 CO2=CaCO3↓ H2O
Hoʻopuka ka kalipuna hina i nā mea ʻē aʻe ma lalo o ka hopena o ka wai a me CO2 i ka lewa, ʻoiai ʻo HPMC e mālama wale i ka wai a kōkua i ka kalipuna hina e loaʻa kahi pane maikaʻi aʻe. ʻAʻole ia e komo i kekahi pane.
He nui nā hoʻohana o ka Hydroxypropyl methyl cellulose. I ke ola o kēlā me kēia lā, nui nā huahana i hiki ʻole ke hoʻokaʻawale ʻia mai ke kaʻina 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 aku i ka hoʻohana pono ʻole ʻana iā ia me ka loaʻa ʻana o ka ʻike.
ʻO ka mea mua, i loko o ka ʻoihana kūkulu hale, hiki ke manaʻo ʻia he mea hoʻopaneʻe a me ka mea hoʻopaʻa wai. Hiki ke hoʻopili ʻia ka mortar mortar, no laila aia nā mortar maloʻo a pau a mākou e hoʻohana ai. Eia kekahi, i nā mea kūkulu hale e like me ka gypsum maka, ka plaster, a me ka pauka lepo, hiki ke hoʻohana ʻia ma ke ʻano he mea hoʻopaʻa, ʻaʻole wale ia e hoʻolōʻihi i ka manawa no ka hana, akā e hoʻolilo hoʻi i ka pena i ʻoi aku ka maʻalahi o ka palaki ʻana. I loko o ke kinikini, nā tile keramika hoʻopili, nā mea hoʻonaninani plastik hui molekala, hiki ke hoʻohana ʻia ma ke ʻano he mea hoʻonui hoʻopili, a pēlā aku. Hiki ke ʻōlelo ʻia ʻo ka hydroxypropyl methyl cellulose ka mea kaulana loa no kona versatility i nā mea kūkulu hale.
I nā ʻoihana ʻē aʻe, e like me ka hana ʻana i ka porcelain a me ka hana ʻana i nā ipu lepo, hiki ke hoʻohana ʻia ma ke ʻano he mea hoʻopili no ka hana ʻana i nā huahana porcelain a me nā ipu lepo; i ka ʻoihana lacquer a me ka paʻi ʻīnika, hiki ke hoʻohana ʻia ma ke ʻano he pauka wehe, thickener, stabilizer, a no ka mea hiki ke hui pū ʻia me ka Solvent organik a i ʻole ka hui ʻana o ka wai, a hiki ke hoʻohana ʻia ma ke ʻano he mea wehe pena i ka hana ʻana i nā plastics hui molekala, a me nā mea palupalu, nā mea hoʻokuʻu ʻōpala, nā lubricants, a pēlā aku; i ka hana ʻana o ka polyvinyl chloride, ua manaʻo ʻia he pauka wehe.
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 lole. He palekana a ʻaʻohe mea ʻawahia, ʻaʻole hoʻonāukiuki loa i nā membrane mucous a me nā ʻili o ke kino kanaka, a hiki ke hoʻohana ʻia ma ke ʻano he mea hoʻohui meaʻai. Eia nō naʻe, i ke kūlana maoli o ka mea, hiki i kona lepo ke hoʻohaumia i ka ea, a ʻaʻole ia he mea maikaʻi no ka mālama ʻana i ka ʻili e hoʻokaʻawale iā ia mai ke ahi e pale aku i ka pahū ʻana.
ka paʻa ʻana o ka wai
ʻO ka hydroxypropyl methylcellulose kūikawā no ke kūkulu ʻana e pale aku i ka hoʻohana nui ʻana o ka wai e ka substrate, a pono e mālama ʻia ka wai i loko o ka plaster i ka hiki ke hiki i ka wā e paʻa loa ai ka gypsum. Ua kapa ʻia kēia waiwai kūikawā ʻo ka paʻa wai a pili pono i ka viscosity o ka hydroxypropyl methylcellulose solution i hoʻohana ʻia no ke kūkulu ʻana i loko o ka plaster. ʻO ke kiʻekiʻe o ka viscosity o ka solution, ʻo ke kiʻekiʻe o ka ʻike paʻa wai.
Anti-salging
Hiki ke hoʻopili ʻia ka sima me nā ʻano kūikawā o ka anti-sagging me kahi uhi mānoanoa me ka ʻole o ka sagging, ʻo ia hoʻi ke ʻano ʻaʻole e loli ke kāne o ka sima ponoʻī, inā ʻaʻole e paheʻe i lalo ke hoʻomaka ke kūkulu ʻia ʻana.
E hoʻemi i ka mānoanoa a hoʻomaʻalahi i ke kūkulu ʻana
Ma hope o ka hoʻohui ʻana i nā huahana hydroxypropyl methylcellulose kikoʻī no ke kūkulu ʻana, hiki ke hana ʻia ka plaster gypsum ʻōmaʻomaʻo me kahi ʻano viscous iki. Ke manaʻo ʻia he kūpono a hoʻohana ʻia kahi pae viscosity haʻahaʻa o ka hydroxypropyl methylcellulose kikoʻī no ke kūkulu ʻana, ua emi iki ke kiʻekiʻe o ka viscosity a ua maʻalahi ke kūkulu ʻana. Eia nō naʻe, ua nāwaliwali iki ka paʻa ʻana o ka wai o ka hydroxypropyl methylcellulose no ke kūkulu ʻana me ka viscosity haʻahaʻa, a pono e hoʻonui i ka nui o ka hoʻohui.
Ka helu hoʻohālikelike palaki
No ka nui paʻa o ka mortar maloʻo, ʻoi aku ka hoʻokele waiwai o ka hana ʻana i kahi nui o ka mortar pulu kiʻekiʻe, hiki ke hoʻokō ʻia ma ka hoʻohui ʻana i kahi wai liʻiliʻi a me nā pehu. Eia nō naʻe, inā lōʻihi loa ka nui o ka wai a me nā pehu, ua hōʻino ʻia ka ikaika.
Ka manawa hoʻouna: ʻApelila-26-2024