He aha ke kiko heheʻe o ka polymer HPMC?

HPMC (Hydroxypropyl Methylcellulose) he hui polymer wai-soluble i hoʻohana nui ʻia i nā lāʻau lapaʻau, meaʻai, kūkulu hale, nā mea hoʻonani a me nā ʻoihana ʻē aʻe. ʻO HPMC kahi derivative cellulose semi-synthetic i loaʻa ma o ka hoʻololi kemika o ka cellulose kūlohelohe, a hoʻohana pinepine ʻia ma ke ʻano he thickener, stabilizer, emulsifier a me ka adhesive.

Nā waiwai kino o HPMC

ʻOi aku ka paʻakikī o ke kiko heheʻe o HPMC no ka mea ʻaʻole maopopo loa kona kiko heheʻe e like me nā mea crystalline maʻamau. Hoʻopilikia ʻia kona kiko heheʻe e ke ʻano molekala, ke kaumaha molekala a me ke kekelē o ka pani ʻana o nā hui hydroxypropyl a me methyl, no laila hiki ke loli e like me ka huahana HPMC kikoʻī. Ma ke ʻano laulā, ma ke ʻano he polymer wai-soluble, ʻaʻohe kiko heheʻe maopopo a like o HPMC, akā palupalu a palaho i loko o kahi pae mahana.

Pae hoʻoheheʻe

ʻOi aku ka paʻakikī o ke ʻano wela o AnxinCel®HPMC, a ʻo kāna ʻano hoʻoheheʻe wela e aʻo pinepine ʻia e ka loiloi thermogravimetric (TGA). Mai nā palapala, hiki ke ʻike ʻia aia ka pae hoʻoheheʻe o HPMC ma waena o 200.°C a me 300°C, akā ʻaʻole kēia pae e hōʻike i ka kiko heheʻe maoli o nā huahana HPMC āpau. Hiki i nā ʻano huahana HPMC like ʻole ke loaʻa nā kiko heheʻe like ʻole a me ke kūpaʻa wela ma muli o nā mea e like me ke kaumaha molekala, ke kekelē o ka ethoxylation (kekelē o ka pani ʻana), ke kekelē o ka hydroxypropylation (kekelē o ka pani ʻana).

HPMC kaumaha molekala haʻahaʻa: Hoʻoheheʻe pinepine ʻia a palupalu paha i nā mahana haʻahaʻa, a hoʻomaka paha e pyrolyze a hoʻoheheʻe paha ma kahi o 200°C.

HPMC kaumaha molekala kiʻekiʻe: ʻO nā polymers HPMC me ke kaumaha molekala kiʻekiʻe aʻe e koi paha i nā mahana kiʻekiʻe e hoʻoheheʻe a palupalu paha ma muli o ko lākou mau kaulahao molekala lōʻihi, a hoʻomaka pinepine e pyrolyze a hoʻoheheʻe ma waena o 250°C a me 300°C.

Nā mea e pili ana i ka kiko heheʻe o HPMC

Kaumaha molekala: ʻOi aku ka hopena o ke kaumaha molekala o HPMC i kona kiko heheʻe. ʻO ke kaumaha molekala haʻahaʻa ke ʻano o ka mahana heheʻe haʻahaʻa, ʻoiai ʻo ke kaumaha molekala kiʻekiʻe e alakaʻi i ke kiko heheʻe kiʻekiʻe.

Ke kēkelē o ka pani ʻana: ʻO ke kēkelē o ka hydroxypropylation (ʻo ia hoʻi ka lakio pani o ka hydroxypropyl i loko o ka mole) a me ke kēkelē o ka methylation (ʻo ia hoʻi ka lakio pani o ka methyl i loko o ka mole) o HPMC e hoʻopilikia pū i kona kiko heheʻe. Ma keʻano laulā, ʻo ke kēkelē kiʻekiʻe o ka pani ʻana e hoʻonui i ka solubility o HPMC a hoʻemi i kona kiko heheʻe.

Ka nui o ka wai: Ma ke ʻano he mea hoʻoheheʻe wai, pili pū ka wahi heheʻe o HPMC i kona nui o ka wai. Hiki i ka HPMC me ka nui o ka wai ke hoʻohaʻahaʻa ʻia a hoʻoheheʻe hapa ʻia paha, e hopena ana i ka loli o ka mahana o ka decomposition thermal.

Paʻa wela a me ka mahana decomposition o HPMC

ʻOiai ʻaʻohe kiko heheʻe paʻa o ka HPMC, ʻo kona kūpaʻa wela kahi hōʻailona hana koʻikoʻi. Wahi a ka ʻikepili thermogravimetric analysis (TGA), hoʻomaka pinepine ka HPMC e palaho ma ka pae mahana o 250°C a i 300°C. Pili ka mahana hoʻoheheʻe kikoʻī i ke kaumaha molekala, ke kekelē o ka pani ʻana a me nā waiwai kino a me nā kemika ʻē aʻe o HPMC.

Ka lapaʻau wela ma nā noi HPMC

I nā noi, he mea nui loa ke kiko heheʻe a me ke kūpaʻa wela o HPMC. No ka laʻana, i ka ʻoihana lāʻau lapaʻau, hoʻohana pinepine ʻia ʻo HPMC ma ke ʻano he mea no nā capsules, nā uhi kiʻiʻoniʻoni, a me nā mea lawe no nā lāʻau lapaʻau hoʻokuʻu mau. I kēia mau noi, pono ke kūpaʻa wela o HPMC e hoʻokō i nā koi mahana hana, no laila ʻo ka hoʻomaopopo ʻana i ke ʻano wela a me ka pae kiko heheʻe o HPMC he mea nui ia no ka kaohi ʻana i ke kaʻina hana.

Ma ke kahua kūkulu hale, hoʻohana pinepine ʻia ʻo AnxinCel®HPMC ma ke ʻano he mea hoʻomānoanoa i ka mortar maloʻo, nā uhi a me nā mea hoʻopili. Ma kēia mau noi, pono nō hoʻi ke kūpaʻa wela o HPMC i loko o kahi pae i ʻole e pala i ka wā o ke kūkulu ʻana.

HPMC, ma ke ʻano he mea polymer, ʻaʻohe ona kiko heheʻe paʻa, akā hōʻike i nā ʻano palupalu a me ka pyrolysis i loko o kahi pae mahana. ʻO kona pae heheʻe ma waena o 200°C a me 300°C, a ʻo ke kiko heheʻe kikoʻī e pili ana i nā mea e like me ke kaumaha molekala, ke kekelē o ka hydroxypropylation, ke kekelē o ka methylation, a me ka nui o ka wai o HPMC. I nā hiʻohiʻona noi like ʻole, he mea nui ka hoʻomaopopo ʻana i kēia mau waiwai wela no kona hoʻomākaukau ʻana a me ka hoʻohana ʻana.