ʻO ka Hydroxypropylmethylcellulose (HPMC) he polymer multifunctional i loaʻa mai ka cellulose maoli. Hoʻohana maʻamau ia i nā ʻoihana like ʻole, me ka lāʻau lapaʻau, ka meaʻai, ke kūkulu ʻana a me nā mea hoʻonaninani. ʻO ka hana ʻana o HPMC e pili ana i nā ʻano mea maka a me kahi kaʻina hana he nui.
Cellulose:
Puna: ʻO ka mea maka nui o HPMC he cellulose, he waiʻaʻaʻa paʻakikī i loaʻa i loko o nā paia o nā mea kanu. ʻO ke kumu maʻamau o cellulose no ka hana HPMC he pulp lāʻau, akā hiki ke hoʻohana ʻia nā kumu ʻē aʻe e like me ka pulupulu linters.
Hoʻomākaukau: Hoʻomaʻamaʻa pinepine ʻia ka Cellulose e wehe i nā haumia a laila hana ʻia i kahi ʻano kūpono no ka hoʻololi hou ʻana.
Kumu:
ʻAno: Hoʻohana pinepine ʻia ʻo Sodium hydroxide (NaOH) a i ʻole potassium hydroxide (KOH) ma ke ʻano he kumu i ka wā mua o ka hana HPMC.
Hana: Hoʻohana ʻia ka alkali no ka mālama ʻana i ka cellulose, ka mea e pehu ai a luku i kona ʻano. ʻO kēia kaʻina hana, i kapa ʻia ʻo alkalization, hoʻomākaukau i ka cellulose no nā hopena hou aʻe.
Alkali etherifying agent:
Hydroxypropylating agent: Hoʻohana pinepine ʻia ka propylene oxide e hoʻokomo i nā hui hydroxypropyl i loko o ka iwi kuamoʻo cellulose. Hāʻawi kēia ʻanuʻu i ka solubility a me nā waiwai makemake ʻē aʻe i ka cellulose.
Nā mea hana methylating: Hoʻohana pinepine ʻia ka Methyl chloride a i ʻole dimethyl sulfate e hoʻokomo i nā hui methyl ma luna o ka hale cellulose, a laila e hoʻonui ai i kāna mau waiwai holoʻokoʻa.
Mea hana methylating:
Methanol: Hoʻohana mau ʻia ka Methanol ma ke ʻano he mea hoʻoheheʻe a reactant i nā kaʻina methylation. Kōkua ia i ka hoʻokomo ʻana i nā hui methyl i loko o nā kaulahao cellulose.
Hydroxypropylating agent:
ʻO ka propylene oxide: ʻO ia ke kumu waiwai nui no ka hoʻokomo ʻana i nā pūʻulu hydroxypropyl i cellulose. ʻO ka hopena ma waena o propylene oxide a me cellulose e hana ʻia ma lalo o nā kūlana hoʻomalu.
mea hoʻolalelale:
Acid Catalyst: Hoʻohana ʻia kahi catalyst acid, e like me ka sulfuric acid, e hāpai i ka hopena etherification. Kōkua lākou i ka mālama ʻana i ka nui o ka hopena a me nā waiwai huahana.
Mea hoʻoheheʻe:
Wai: Hoʻohana pinepine ʻia ka wai ma ke ʻano he solvent ma nā ʻano like ʻole o ka hana hana. He mea nui ia no ka hoʻoheheʻe ʻana i nā reactants a me ka hoʻolaha ʻana i ka hopena ma waena o ka cellulose a me ka etherifying agents.
Mea hoʻokuʻu:
ʻO ka sodium hydroxide (NaOH) a i ʻole ka potassium hydroxide (KOH): hoʻohana ʻia e hoʻokaʻawale i nā catalysts acid a hoʻoponopono i ka pH i ka wā synthesis.
mea hoʻomaʻemaʻe:
Nā kōkua kānana: Hiki ke hoʻohana ʻia nā ʻano kōkua kānana e wehe i nā haumia a me nā huahana i makemake ʻole ʻia mai ka hui ʻana.
Nā mea hoʻomaʻemaʻe: ʻO ka holoi ʻana me ka wai a i ʻole nā mea hoʻoheheʻe ʻē aʻe e kōkua i ka wehe ʻana i nā koena kemika a me nā haumia mai ka huahana hope.
Desiccant:
Hoʻomaloʻo ʻana i ka ea a i ʻole ka umu: Ma hope o ka hoʻomaʻemaʻe ʻana, hiki ke hoʻomaloʻo ʻia ka huahana a i ʻole ka umu e hoʻomaloʻo e hoʻoneʻe i ke koena solvent a me ka wai.
Mea hoʻomalu maikaʻi:
Analytical Reagents: Hoʻohana ʻia nā reagents like ʻole no nā kumu hoʻomalu maikaʻi e hōʻoia i ka hoʻokō ʻana o nā huahana HPMC i ka hana pono a me nā kikoʻī.
ʻO ka hana ʻana o ka hydroxypropyl methylcellulose e pili ana i ka hoʻololi ʻana i ka cellulose ma o ke ʻano o nā hopena kemika. Loaʻa nā mea waiwai i ka cellulose, alkali, etherifying agent, catalyst, solvent, neutralizing agent, purifying agent a me ka desiccant, kahi mea nui i ka hana synthesis. Hiki ke ʻokoʻa nā kūlana kikoʻī a me nā reagents i hoʻohana ʻia ma muli o nā waiwai i makemake ʻia a me ka hoʻohana ʻana o ka huahana hydroxypropyl methylcellulose hope loa.
Ka manawa hoʻouna: Dec-21-2023