ʻO ka Cellulose Acetate, CA no ka pōkole.ʻO ka Cellulose Acetate kahiʻano fiber i hanaʻia e ke kanaka, i māheleʻia i ka diacetate fiber a me ka triacetate fiber. Hana ʻia ka fiber kemika me ka cellulose, i hoʻololi ʻia i cellulose acetate e ke ʻano kemika. Ua hoʻomākaukau mua ʻia i ka makahiki 1865 ma ke ʻano he cellulose acetate. He resin thermoplastic i loaʻa ma ka esterification o cellulose me ka acetic acid a i ʻole acetic anhydride ma lalo o ka hana o ka catalyst. He polymer maoli i hoʻololi kemika i loaʻa ma o ka esterification o ka hydroxyl i loko o nā molekole cellulose me ka acetic acid. ʻO kāna hana ma muli o ke ʻano o ka acetylation.

01. Hoʻokaʻawale o CA

Hiki ke hoʻokaʻawale ʻia ka cellulose i ka fiber diacetate a me ka triacetate fiber e like me ke kiʻekiʻe o ka hydroxy substitution e ka hui acetyl.

Hoʻokumu ʻia ka ʻakika diacetic ma hope o ka hydrolysis hapa o ka acetate type I, a ʻoi aku ka haʻahaʻa o kona degere esterification ma mua o ka ʻano III acetate. No laila, ʻoi aku ka haʻahaʻa o ka hoʻomehana ʻana ma mua o ka vīnega ʻekolu, ʻoi aku ka maikaʻi o ka hana hoʻoluʻu ma mua o ka vīnega ʻekolu, a ʻoi aku ka kiʻekiʻe o ka hoʻomaʻamaʻa ʻana o ka wai ma mua o ka vīnega ʻekolu.

ʻO ka waikawa Triacetic kahi ʻano acetate me ke kiʻekiʻe esterification kiʻekiʻe me ka hydrolysis. No laila, ua ikaika ka māmā a me ka wela, ka maikaʻi ʻole o ke kala ʻana a me ka haʻahaʻa haʻahaʻa o ka moisture absorption (ʻike ʻia ʻo moisture rein).

I loko o ka molecular structure o ka acetate fiber, ua hoʻololi ʻia ka hui hydroxyl ma ke apo glucose cellulose e ka hui acetyl e hana i ka pilina ester. ʻOi aku ka haʻahaʻa o ka esterification o ka fiber diacetate ma mua o ka triacetate fiber ma muli o ka hydrolysis. ʻO ka fiber diacetate he wahi amorphous nui i loko o ka hoʻolālā supramolecular, ʻoiai ʻo ka triacetate fiber kekahi ʻano crystalline, a ʻoi aku ka kiʻekiʻe o ka symmetry, regularity a me ka crystallinity o ka fiber macromolecules ma mua o ka fiber diacetate.

02. Nā waiwai o ka fiber acetate

Nā waiwai kemika

1. Alkali kū'ē

ʻAʻole i hoʻopōʻino ka mea ʻala alkali nāwaliwali i ka fiber acetate, a he liʻiliʻi loa ka nui o ke kaumaha o ka fiber. Ma hope o ka loaʻa ʻana o ka alkali ikaika, ʻoi aku ka diacetate fiber, maʻalahi ke deacetylate, e hopena i ka pohō kaumaha, ka ikaika a me ka modulus. No laila, ʻaʻole pono ka pH o ka hopena no ka mālama ʻana i ka fiber acetate ma mua o 7.0. Ma lalo o nā kūlana holoi maʻamau, he ikaika ka chlorine bleaching resistance, a hiki ke hoʻomaʻemaʻe ʻia me ka tetrachloroethylene.

2. Ke kū'ē i nā mea hoʻoheheʻe organik

Hoʻopau loa ʻia ka cellulose acetate i ka acetone, DMF a me ka glacial acetic acid, akā ʻaʻole i ka ethanol a me ka tetrachloroethylene. E like me kēia mau hiʻohiʻona, hiki ke hoʻohana ʻia ka acetone e like me ka solvent wili o ka acetate fiber, a hiki ke hoʻohana ʻia ka tetrachlorethylene no ka hoʻomaʻemaʻe maloʻo o nā lole acetate fiber.

3. Kaʻakika kūʻē

Loaʻa i ka CA kahi kūpaʻa kūpaʻa maikaʻi. ʻAʻole pili ka sulfuric acid maʻamau, hydrochloric acid a me ka waikawa nitric i ka ikaika, luster a me ka elongation o ka fiber i loko o kahi pae koʻikoʻi; Akā hiki ke hoʻoheheʻe ʻia i loko o ka sulfuric acid concentrated, concentrated hydrochloric acid a me concentrated nitric acid.

4. Hooluu

ʻOiai ua loaʻa mai nā acetate fibers mai ka cellulose, kahi hapa nui o nā pūʻulu hydroxyl polar ma ke apo glucose cellulose e pani ʻia e nā hui acetyl e hana i nā esters i ka wā esterification. No laila, ʻaʻohe pili o nā mea pena i hoʻohana mau ʻia no ke kala ʻana i nā fiber cellulose. ʻO nā mea waihoʻoluʻu kūpono loa no ka fiber acetate, ʻo ia nā mea hoʻoheheʻe haʻahaʻa haʻahaʻa me ka nui o ka lawe ʻana i ka wai.

ʻO ka fiber Acetate a i ʻole ka lole i hoʻoluʻu ʻia me nā mea hoʻoheheʻe ʻia he kala ʻālohilohi, hopena pae maikaʻi, kiʻekiʻe o ka lawe ʻana i ka wai, kiʻekiʻe ka wikiwiki o ka waihoʻoluʻu a me ka chromatography piha.

waiwai kino

1. ʻAʻole i loaʻa iā CA kekahi mau wai hoʻoheheʻe wale ʻia, akā loaʻa nō hoʻi ka waiwai o ka hoʻoneʻe wikiwiki ʻana ma hope o ka lawe ʻana i ka wai.

2. He maikaʻi ke kūpaʻa wela o ka fiber acetate. ʻO ka mahana hoʻololi aniani o ka fiber ma kahi o 185 ℃, a ʻo ka wela hoʻoheheʻe ʻana ma kahi o 310 ℃. I ka hopena o ka piʻi ʻana o ka mahana, ʻo 90.78% ka nui o ka pohō kaumaha o ka fiber; ʻO ka ikaika haʻihaʻi o ka fiber acetate he 1.29 cN/dtex, aʻo ke kānana he 31.44%.

3. ʻOi aku ka liʻiliʻi o CA ma mua o ka viscose fiber, kahi kokoke i ka polyester fiber; ʻO ka ikaika ka haʻahaʻa loa o nā fiber ʻekolu.

4. He elasticity maikaʻi ko CA, e like me ka siliki a me ka hulu hipa

5. He haʻahaʻa ka emi ʻana o ka wai paila, akā ʻo ka mālama wela kiʻekiʻe e pili i ka ikaika a me ka luster o ka fiber, no laila ʻaʻole pono ka mahana ma mua o 85 ℃

ʻO nā pono o ka Cellulose Acetate

1.Diacetate fiber he maikaʻi ka ea permeability a me ka waiwai anti-static

I loko o ke kaiapuni me ka haʻahaʻa haʻahaʻa o 65%, ʻo ka diacetate ka like me ka pulupulu, a ʻoi aku ka maikaʻi o ka hoʻomaloʻo wikiwiki ʻana ma mua o ka pulupulu, no laila hiki iā ia ke komo maikaʻi i ka wai i hoʻopau ʻia e ke kino kanaka a hoʻokuʻu iā ia i ka manawa like. I ʻoluʻolu ka poʻe. I ka manawa like, hiki i ka hana hoʻoheheʻe wai maikaʻi ke hōʻemi i ka hōʻiliʻili o ka uila static, ʻaʻole maʻalahi ka hana ʻana i ka uila static.

2. Loaʻa i ka fiber diacetate kahi pā palupalu

He haʻahaʻa ka modulus mua, a ua nāwaliwali ka fiber a hiki ke maʻalahi ma lalo o ka hana o ka ukana liʻiliʻi, e hōʻike ana i kahi ʻano palupalu, no laila he palupalu a ʻoluʻolu ka ʻili. Akā inā haʻahaʻa loa ka modulus mua, e nāwaliwali ia.

He kiʻekiʻe ka modulus mua, a paʻa ka fiber a ʻaʻole maʻalahi ke kulou ma lalo o ka hana o ka ukana liʻiliʻi, e hōʻike ana i kahi ʻano ʻoʻoleʻa.

3. He kūlana deodorization maikaʻi ka fiber diacetate

No ke aha ke ʻano maikaʻi o ka lole acetate?

1. ʻO ka fiber diacetate he luster palupalu e like me ka momi

ʻO ka ʻāpana keʻa o ka silika mulberry he triangle ʻaʻole maʻamau, a ʻo ka pauku keʻa o ka fiber acetate he concave convex irregular. Loaʻa iā lāua ʻelua nā kaha lōʻihi ma ko lāua mau ʻāpana longitudinal, e hoʻopuehu ana ko lāua kukui transverse a me ka mālamalama longitudinal diffuse. He haʻahaʻa ka index refractive, 1.48. No laila, ʻo ka mulberry silika a hāʻawi i kahi ʻulaʻula palupalu e like me ka momi.

2. Loaʻa i ka Cellulose Acetate kahi drapability maikaʻi loa

ʻO ka modulus mua o ka fiber he 30-45cn / dtex, nāwaliwali ka rigidity, ʻo ka ʻāpana keʻa he concave convex irregular, palupalu ka lole, a maikaʻi ka manaʻo draping.

3. Loaʻa i ka fiber diacetate nā kala ʻālohilohi a me ka wikiwiki o ke kala

ʻO ke kala acetate fiber, ka chromatography piha, ka waihoʻoluʻu piha a me ka maʻemaʻe, ka wikiwiki o ka waihoʻoluʻu.

4. ʻO ka fiber Acetate kahi kūpaʻa maikaʻi

He haʻahaʻa ka hoʻonui ʻia ʻana o ka wai, no laila ke kūpaʻa maikaʻi ʻo ia ma hope o ka hana ʻana i lole e mālama ai i ka nani o nā lole.

5. ʻO ka fiber diacetate kahi waiwai antifouling kūlike

No ka lepo me ka lepo, ka wai a me ka aila, ʻaʻole maʻalahi ka haumia a maʻalahi hoʻi e hoʻomaʻemaʻe