4 Nā ʻenehana hana kumu a me nā ʻano o ka HPMC, mai nalo!

ʻO ka Hydroxypropyl methylcellulose (HPMC) he polymer versatile i hoʻohana nui ʻia i nā ʻoihana like ʻole, e like me ke kūkulu ʻana, lāʻau lapaʻau, a me nā ʻoihana meaʻai. Hana ʻia ʻo HPMC me ka hoʻohana ʻana i nā ʻenehana hana like ʻole a me nā ʻano hana, e pili ana i ka noi i manaʻo ʻia. Ma kēia ʻatikala, e ʻimi mākou i ʻehā mau ʻenehana hana kumu a me nā ʻano o ka HPMC āu e poina ʻole ai.

1. ʻIkepili Etherification ʻO ka ʻenehana etherification ka ʻenehana hana maʻamau i hoʻohana ʻia no HPMC. Ma kēia kaʻina hana, mālama ʻia ka cellulose me kahi alkali, e like me ka sodium hydroxide, e hana i ka cellulose alkali. Hoʻopili ʻia ka cellulose alkali me ka propylene oxide a me ka methyl chloride e hana i ka HPMC. Hiki ke ho'omalu 'ia ke degere o ka ho'ololi 'ana (DS) o HPMC ma ka ho'ololi 'ana i ka ratio o ka propylene oxide i ka methyl chloride i ka wā o ka hopena.

ʻO ke kumu no ka HPMC i hana ʻia me ka ʻenehana etherification:

Kelepona + Alkali → Alkali Cellulose Alkali Cellulose + Propylene Oxide + Methyl Chloride → HPMC

2. ʻenehana hoʻomaloʻo Spray ʻO ka ʻenehana hoʻomaloʻo hoʻoheheʻe ʻia he ʻenehana hana kiʻekiʻe loa no HPMC. Ma kēia kaʻina hana, hoʻoheheʻe ʻia ka cellulose i loko o kahi hopena alkali a laila hoʻopili ʻia me ka propylene oxide a me ka methyl chloride. Hoʻomaloʻo ʻia ka hopena HPMC e hana i ka pauka HPMC.

ʻO ke kumu no ka HPMC i hana ʻia me ka ʻenehana hoʻomaloʻo ʻana:

Cellulose + Alkali → Alkali Cellulose Alkali Cellulose + Propylene Oxide + Methyl Chloride → HPMC Solution HPMC Solution + Spray Drying → HPMC Powder

3. ʻO ka ʻenehana polymerization hoʻokuʻu ʻia kahi ʻenehana hana hou no HPMC. Ma kēia kaʻina hana, hoʻokuʻu ʻia ka cellulose i loko o kahi mea hoʻoheheʻe a laila hoʻopili ʻia me ka propylene oxide a me ka methyl chloride i mua o kahi mea hoʻomaka polymerization e hana i ka HPMC.

ʻO ke kumu no ka HPMC i hana ʻia me ka hoʻohana ʻana i ka ʻenehana polymerization suspension:

Cellulose + Solvent + Polymerization Initiator → Cellulose Suspension Cellulose Suspension + Propylene Oxide + Methyl Chloride → HPMC

4. ʻO ka ʻenehana polymerization solution he ʻenehana hana hou no HPMC. Ma kēia kaʻina hana, ua hoʻoheheʻe ʻia ka cellulose i loko o kahi mea hoʻoheheʻe a laila hana ʻia me ka propylene oxide a me ka methyl chloride i mua o kahi mea hoʻomaka polymerization e hana i ka HPMC.

ʻO ke kumu no ka HPMC i hana ʻia me ka ʻenehana polymerization solution:

Cellulose + Solvent + Polymerization Initiator → Cellulose Solution Cellulose Solution + Propylene Oxide + Methyl Chloride → HPMC

I ka hopena, ʻo HPMC kahi polymer versatile i hana ʻia me ka hoʻohana ʻana i nā ʻenehana hana like ʻole a me nā ʻano hana, e pili ana i ka noi i manaʻo ʻia. ʻO nā ʻenehana hana kumu ʻehā a me nā ʻano hoʻohālikelike o HPMC e loaʻa i ka ʻenehana etherification, ka ʻenehana hoʻomaloʻo ʻana, ka ʻenehana polymerization hoʻokuʻu, a me ka ʻenehana polymerization solution. ʻO ka hoʻomaopopo ʻana i ka ʻenehana hana a me ke ʻano o ka HPMC hiki ke kōkua i nā mea hana e koho i ka huahana HPMC kūpono no kā lākou mau noi kikoʻī.